Remove JSON dump

Now using the PostgreSQL client library from the distribution package.

.gitignore

@@ -174,3 +174,6 @@ poetry.toml
 pyrightconfig.json
 
 # End of https://www.toptal.com/developers/gitignore/api/python
+
+# Project specific ignores
+database.db

alembic/versions/325b901ac712_nordigen_tokens.py

@@ -0,0 +1,35 @@
+"""nordigen tokens
+
+Revision ID: 325b901ac712
+Revises: 60469d5dd2b0
+Create Date: 2023-05-25 19:10:10.374008+00:00
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "325b901ac712"
+down_revision = "60469d5dd2b0"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table(
+        "nordigen",
+        sa.Column("type", sa.String(), nullable=False),
+        sa.Column("token", sa.String(), nullable=False),
+        sa.Column("expires", sa.DateTime(), nullable=False),
+        sa.PrimaryKeyConstraint("type", name=op.f("pk_nordigen")),
+        schema="pfbudget",
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table("nordigen", schema="pfbudget")
+    # ### end Alembic commands ###

alembic/versions/60469d5dd2b0_drop_sqlalchemy_enum.py

@@ -0,0 +1,48 @@
+"""Drop SQLAlchemy enum
+
+Revision ID: 60469d5dd2b0
+Revises: b599dafcf468
+Create Date: 2023-05-15 19:24:07.911352+00:00
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = "60469d5dd2b0"
+down_revision = "b599dafcf468"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.execute(
+        """
+        CREATE TYPE pfbudget.scheduleperiod
+        AS ENUM ('daily', 'weekly', 'monthly', 'yearly')
+        """
+    )
+    op.execute(
+        """ALTER TABLE pfbudget.category_schedules
+        ALTER COLUMN period TYPE pfbudget.scheduleperiod
+        USING period::text::pfbudget.scheduleperiod
+        """
+    )
+    op.execute("DROP TYPE pfbudget.period")
+
+
+def downgrade() -> None:
+    op.execute(
+        """
+        CREATE TYPE pfbudget.period
+        AS ENUM ('daily', 'weekly', 'monthly', 'yearly')
+        """
+    )
+    op.execute(
+        """ALTER TABLE pfbudget.category_schedules
+        ALTER COLUMN period TYPE pfbudget.period
+        USING period::text::pfbudget.period
+        """
+    )
+    op.execute("DROP TYPE pfbudget.scheduleperiod")

alembic/versions/8623e709e111_compact_category_selector.py

@@ -0,0 +1,74 @@
+"""Compact category selector
+
+Revision ID: 8623e709e111
+Revises: ce68ee15e5d2
+Create Date: 2023-05-08 19:00:51.063240+00:00
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = "8623e709e111"
+down_revision = "ce68ee15e5d2"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table("category_selectors", schema="pfbudget")
+    op.add_column(
+        "transactions_categorized",
+        sa.Column(
+            "selector",
+            sa.Enum(
+                "unknown",
+                "nullifier",
+                "vacations",
+                "rules",
+                "algorithm",
+                "manual",
+                name="selector_t",
+                schema="pfbudget",
+                inherit_schema=True,
+            ),
+            nullable=False,
+        ),
+        schema="pfbudget",
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column("transactions_categorized", "selector", schema="pfbudget")
+    op.create_table(
+        "category_selectors",
+        sa.Column("id", sa.BIGINT(), autoincrement=False, nullable=False),
+        sa.Column(
+            "selector",
+            postgresql.ENUM(
+                "unknown",
+                "nullifier",
+                "vacations",
+                "rules",
+                "algorithm",
+                "manual",
+                name="selector_t",
+                schema="pfbudget",
+            ),
+            autoincrement=False,
+            nullable=False,
+        ),
+        sa.ForeignKeyConstraint(
+            ["id"],
+            ["pfbudget.transactions_categorized.id"],
+            name="fk_category_selectors_id_transactions_categorized",
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name="pk_category_selectors"),
+        schema="pfbudget",
+    )
+    # ### end Alembic commands ###

alembic/versions/b599dafcf468_selector_type_name_change.py

@@ -0,0 +1,46 @@
+"""Selector type name change
+
+Revision ID: b599dafcf468
+Revises: 8623e709e111
+Create Date: 2023-05-08 19:46:20.661214+00:00
+
+"""
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "b599dafcf468"
+down_revision = "8623e709e111"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.execute(
+        """
+        CREATE TYPE pfbudget.categoryselector
+        AS ENUM ('unknown', 'nullifier', 'vacations', 'rules', 'algorithm', 'manual')
+        """
+    )
+    op.execute(
+        """ALTER TABLE pfbudget.transactions_categorized
+        ALTER COLUMN selector TYPE pfbudget.categoryselector
+        USING selector::text::pfbudget.categoryselector
+        """
+    )
+    op.execute("DROP TYPE pfbudget.selector_t")
+
+
+def downgrade() -> None:
+    op.execute(
+        """
+        CREATE TYPE pfbudget.selector_t
+        AS ENUM ('unknown', 'nullifier', 'vacations', 'rules', 'algorithm', 'manual')
+        """
+    )
+    op.execute(
+        """ALTER TABLE pfbudget.transactions_categorized
+        ALTER COLUMN selector TYPE pfbudget.selector_t
+        USING selector::text::pfbudget.selector_t
+        """
+    )
+    op.execute("DROP TYPE pfbudget.categoryselector")

pfbudget/__main__.py

@@ -38,10 +38,10 @@ if __name__ == "__main__":
             params = [args["path"], args["bank"], args["creditcard"]]
 
         case Operation.RequisitionId:
-            keys = {"name", "country"}
+            keys = {"bank"}
             assert args.keys() >= keys, f"missing {args.keys() - keys}"
 
-            params = [args["name"][0], args["country"][0]]
+            params = [args["bank"][0]]
 
         case Operation.Download:
             keys = {"all", "banks", "interval", "start", "end", "year", "dry_run"}
@@ -163,14 +163,14 @@ if __name__ == "__main__":
 
             params = [
                 type.CategoryRule(
-                    args["start"][0] if args["start"] else None,
-                    args["end"][0] if args["end"] else None,
-                    args["description"][0] if args["description"] else None,
-                    args["regex"][0] if args["regex"] else None,
-                    args["bank"][0] if args["bank"] else None,
-                    args["min"][0] if args["min"] else None,
-                    args["max"][0] if args["max"] else None,
                     cat,
+                    start=args["start"][0] if args["start"] else None,
+                    end=args["end"][0] if args["end"] else None,
+                    description=args["description"][0] if args["description"] else None,
+                    regex=args["regex"][0] if args["regex"] else None,
+                    bank=args["bank"][0] if args["bank"] else None,
+                    min=args["min"][0] if args["min"] else None,
+                    max=args["max"][0] if args["max"] else None,
                 )
                 for cat in args["category"]
             ]
@@ -215,14 +215,14 @@ if __name__ == "__main__":
 
             params = [
                 type.TagRule(
-                    args["start"][0] if args["start"] else None,
-                    args["end"][0] if args["end"] else None,
-                    args["description"][0] if args["description"] else None,
-                    args["regex"][0] if args["regex"] else None,
-                    args["bank"][0] if args["bank"] else None,
-                    args["min"][0] if args["min"] else None,
-                    args["max"][0] if args["max"] else None,
                     tag,
+                    start=args["start"][0] if args["start"] else None,
+                    end=args["end"][0] if args["end"] else None,
+                    description=args["description"][0] if args["description"] else None,
+                    regex=args["regex"][0] if args["regex"] else None,
+                    bank=args["bank"][0] if args["bank"] else None,
+                    min=args["min"][0] if args["min"] else None,
+                    max=args["max"][0] if args["max"] else None,
                 )
                 for tag in args["tag"]
             ]

pfbudget/cli/argparser.py

@@ -6,7 +6,7 @@ import os
 import re
 
 from pfbudget.common.types import Operation
-from pfbudget.db.model import AccountType, Period
+from pfbudget.db.model import AccountType, SchedulePeriod
 
 from pfbudget.db.sqlite import DatabaseClient
 import pfbudget.reporting.graph
@@ -60,11 +60,12 @@ def argparser() -> argparse.ArgumentParser:
     # init = subparsers.add_parser("init")
     # init.set_defaults(op=Operation.Init)
 
-    # Exports transactions to .csv file
+    # Exports transactions to specified format and file
     export = subparsers.add_parser("export")
     export.set_defaults(op=Operation.Export)
     file_options(export)
 
+    # Imports transactions from specified format and file
     pimport = subparsers.add_parser("import")
     pimport.set_defaults(op=Operation.Import)
     file_options(pimport)
@@ -132,8 +133,7 @@ def argparser() -> argparse.ArgumentParser:
     # PSD2 requisition id
     requisition = subparsers.add_parser("eua")
     requisition.set_defaults(op=Operation.RequisitionId)
-    requisition.add_argument("id", nargs=1, type=str)
+    requisition.add_argument("bank", nargs=1, type=str)
-    requisition.add_argument("country", nargs=1, type=str)
 
     # Download through the PSD2 API
     download = subparsers.add_parser("download", parents=[period])
@@ -268,7 +268,7 @@ def category(parser: argparse.ArgumentParser):
     schedule = commands.add_parser("schedule")
     schedule.set_defaults(op=Operation.CategorySchedule)
     schedule.add_argument("category", nargs="+", type=str)
-    schedule.add_argument("period", nargs=1, choices=[e.value for e in Period])
+    schedule.add_argument("period", nargs=1, choices=[e.value for e in SchedulePeriod])
     schedule.add_argument("--frequency", nargs=1, default=[1], type=int)
 
     rule = commands.add_parser("rule")

pfbudget/cli/interactive.py

@@ -3,9 +3,8 @@ import decimal
 from ..core.manager import Manager
 from ..db.model import (
     Category,
-    CategorySelector,
     Note,
-    Selector_T,
+    CategorySelector,
     SplitTransaction,
     Tag,
     Transaction,
@@ -16,15 +15,13 @@ from ..db.model import (
 
 class Interactive:
     help = "category(:tag)/split/note:/skip/quit"
-    selector = Selector_T.manual
+    selector = CategorySelector.manual
 
     def __init__(self, manager: Manager) -> None:
         self.manager = manager
 
-        with self.manager.db.session() as session:
+        self.categories = self.manager.database.select(Category)
-            self.categories = session.get(Category)
+        self.tags = self.manager.database.select(Tag)
-            self.tags = session.get(Tag)
-            session.expunge_all()
 
     def intro(self) -> None:
         print(
@@ -35,28 +32,34 @@ class Interactive:
     def start(self) -> None:
         self.intro()
 
-        with self.manager.db.session() as session:
+        with self.manager.database.session as session:
-            uncategorized = session.uncategorized()
+            uncategorized = session.select(
+                Transaction, lambda: ~Transaction.category.has()
+            )
+            uncategorized.sort()
             n = len(uncategorized)
             print(f"{n} left to categorize")
 
             i = 0
             new = []
-            next = uncategorized[i]
+
-            print(next)
+            while (command := input("$ ")) != "quit" and i < len(uncategorized):
-            while (command := input("$ ")) != "quit":
+                current = uncategorized[i] if len(new) == 0 else new.pop()
+                print(current)
+
                 match command:
                     case "help":
                         print(self.help)
 
                     case "skip":
-                        i += 1
+                        if len(uncategorized) == 0:
+                            i += 1
 
                     case "quit":
                         break
 
                     case "split":
-                        new = self.split(next)
+                        new = self.split(current)
                         session.insert(new)
 
                     case other:
@@ -67,34 +70,31 @@ class Interactive:
                         if other.startswith("note:"):
                             # TODO adding notes to a splitted transaction won't allow
                             # categorization
-                            next.note = Note(other[len("note:") :].strip())
+                            current.note = Note(other[len("note:") :].strip())
                         else:
                             ct = other.split(":")
                             if (category := ct[0]) not in [
                                 c.name for c in self.categories
                             ]:
                                 print(self.help, self.categories)
+                                continue
 
                             tags = []
                             if len(ct) > 1:
                                 tags = ct[1:]
 
-                            next.category = TransactionCategory(
+                            current.category = TransactionCategory(
-                                category, CategorySelector(self.selector)
+                                category, self.selector
                             )
                             for tag in tags:
                                 if tag not in [t.name for t in self.tags]:
                                     session.insert([Tag(tag)])
                                     self.tags = session.get(Tag)
 
-                                next.tags.add(TransactionTag(tag))
+                                current.tags.add(TransactionTag(tag))
 
-                            i += 1
+                            if len(new) == 0:
-
+                                i += 1
-                        session.commit()
-
-                next = uncategorized[i] if len(new) == 0 else new.pop()
-                print(next)
 
     def split(self, original: Transaction) -> list[SplitTransaction]:
         total = original.amount

pfbudget/common/types.py

@@ -51,6 +51,11 @@ class Operation(Enum):
     ImportCategoryGroups = auto()
 
 
+class ExportFormat(Enum):
+    JSON = auto()
+    pickle = auto()
+
+
 class TransactionError(Exception):
     pass
 

pfbudget/core/command.py

@@ -0,0 +1,128 @@
+from abc import ABC, abstractmethod
+import json
+from pathlib import Path
+import pickle
+from typing import Type
+
+from pfbudget.common.types import ExportFormat
+from pfbudget.db.client import Client
+from pfbudget.db.model import (
+    Bank,
+    Category,
+    CategoryGroup,
+    Serializable,
+    Tag,
+    Transaction,
+)
+
+# required for the backup import
+import pfbudget.db.model
+
+
+class Command(ABC):
+    @abstractmethod
+    def execute(self) -> None:
+        raise NotImplementedError
+
+    def undo(self) -> None:
+        raise NotImplementedError
+
+
+class ExportCommand(Command):
+    def __init__(
+        self, client: Client, what: Type[Serializable], fn: Path, format: ExportFormat
+    ):
+        self.__client = client
+        self.what = what
+        self.fn = fn
+        self.format = format
+
+    def execute(self) -> None:
+        values = self.__client.select(self.what)
+        match self.format:
+            case ExportFormat.JSON:
+                with open(self.fn, "w", newline="") as f:
+                    json.dump([e.serialize() for e in values], f, indent=4)
+            case ExportFormat.pickle:
+                raise AttributeError("pickle export not working at the moment!")
+                with open(self.fn, "wb") as f:
+                    pickle.dump(values, f)
+
+
+class ImportCommand(Command):
+    def __init__(
+        self, client: Client, what: Type[Serializable], fn: Path, format: ExportFormat
+    ):
+        self.__client = client
+        self.what = what
+        self.fn = fn
+        self.format = format
+
+    def execute(self) -> None:
+        match self.format:
+            case ExportFormat.JSON:
+                with open(self.fn, "r") as f:
+                    try:
+                        values = json.load(f)
+                        values = [self.what.deserialize(v) for v in values]
+                    except json.JSONDecodeError as e:
+                        raise ImportFailedError(e)
+
+            case ExportFormat.pickle:
+                raise AttributeError("pickle import not working at the moment!")
+                with open(self.fn, "rb") as f:
+                    values = pickle.load(f)
+
+        self.__client.insert(values)
+
+
+class ImportFailedError(Exception):
+    pass
+
+
+class BackupCommand(Command):
+    def __init__(self, client: Client, fn: Path, format: ExportFormat) -> None:
+        self.__client = client
+        self.fn = fn
+        self.format = format
+
+    def execute(self) -> None:
+        banks = self.__client.select(Bank)
+        groups = self.__client.select(CategoryGroup)
+        categories = self.__client.select(Category)
+        tags = self.__client.select(Tag)
+        transactions = self.__client.select(Transaction)
+
+        values = [*banks, *groups, *categories, *tags, *transactions]
+
+        match self.format:
+            case ExportFormat.JSON:
+                with open(self.fn, "w", newline="") as f:
+                    json.dump([e.serialize() for e in values], f, indent=4)
+            case ExportFormat.pickle:
+                raise AttributeError("pickle export not working at the moment!")
+
+
+class ImportBackupCommand(Command):
+    def __init__(self, client: Client, fn: Path, format: ExportFormat) -> None:
+        self.__client = client
+        self.fn = fn
+        self.format = format
+
+    def execute(self) -> None:
+        match self.format:
+            case ExportFormat.JSON:
+                with open(self.fn, "r") as f:
+                    try:
+                        values = json.load(f)
+                        values = [
+                            getattr(pfbudget.db.model, v["class_"]).deserialize(v)
+                            for v in values
+                        ]
+                    except json.JSONDecodeError as e:
+                        raise ImportFailedError(e)
+
+            case ExportFormat.pickle:
+                raise AttributeError("pickle import not working at the moment!")
+
+        self.__client.insert(values)

pfbudget/core/manager.py

@@ -1,4 +1,3 @@
-import csv
 import json
 from pathlib import Path
 import pickle
@@ -14,12 +13,11 @@ from pfbudget.db.model import (
     CategoryGroup,
     CategoryRule,
     CategorySchedule,
-    CategorySelector,
     Link,
     MoneyTransaction,
-    Nordigen,
+    NordigenBank,
     Rule,
-    Selector_T,
+    CategorySelector,
     SplitTransaction,
     Tag,
     TagRule,
@@ -81,7 +79,7 @@ class Manager:
                 else:
                     banks = self.database.select(Bank, Bank.nordigen)
 
-                extractor = PSD2Extractor(Manager.nordigen_client())
+                extractor = PSD2Extractor(self.nordigen_client())
 
                 transactions = []
                 for bank in banks:
@@ -103,10 +101,20 @@ class Manager:
                     categories = session.select(Category)
                     tags = session.select(Tag)
 
-                    rules = [cat.rules for cat in categories if cat.name == "null"]
+                    rules = [
+                        rule
+                        for cat in categories
+                        if cat.name == "null"
+                        for rule in cat.rules
+                    ]
                     Nullifier(rules).transform_inplace(uncategorized)
 
-                    rules = [rule for cat in categories for rule in cat.rules]
+                    rules = [
+                        rule
+                        for cat in categories
+                        if cat.name != "null"
+                        for rule in cat.rules
+                    ]
                     Categorizer(rules).transform_inplace(uncategorized)
 
                     rules = [rule for tag in tags for rule in tag.rules]
@@ -116,24 +124,34 @@ class Manager:
                 self.database.update(Bank, params)
 
             case Operation.PSD2Mod:
-                self.database.update(Nordigen, params)
+                self.database.update(NordigenBank, params)
 
             case Operation.BankDel:
                 self.database.delete(Bank, Bank.name, params)
 
             case Operation.PSD2Del:
-                self.database.delete(Nordigen, Nordigen.name, params)
+                self.database.delete(NordigenBank, NordigenBank.name, params)
-
-            case Operation.Token:
-                Manager.nordigen_client().generate_token()
 
             case Operation.RequisitionId:
-                link, _ = Manager.nordigen_client().requisition(params[0], params[1])
+                bank_name = params[0]
-                print(f"Opening {link} to request access to {params[0]}")
+                bank = self.database.select(Bank, (lambda: Bank.name == bank_name))[0]
+
+                if not bank.nordigen or not bank.nordigen.bank_id:
+                    raise ValueError(f"{bank} doesn't have a Nordigen ID")
+
+                link, req_id = self.nordigen_client().new_requisition(
+                    bank.nordigen.bank_id
+                )
+
+                self.database.update(
+                    NordigenBank,
+                    [{"name": bank.nordigen.name, "requisition_id": req_id}],
+                )
+
                 webbrowser.open(link)
 
             case Operation.PSD2CountryBanks:
-                banks = Manager.nordigen_client().country_banks(params[0])
+                banks = self.nordigen_client().country_banks(params[0])
                 print(banks)
 
             case (
@@ -245,10 +263,7 @@ class Manager:
                     session.insert(transactions)
 
             case Operation.Export:
-                with self.database.session as session:
+                self.dump(params[0], params[1], self.database.select(Transaction))
-                    self.dump(
-                        params[0], params[1], self.database.select(Transaction, session)
-                    )
 
             case Operation.Import:
                 transactions = []
@@ -274,8 +289,7 @@ class Manager:
 
                     if category := row.pop("category", None):
                         transaction.category = TransactionCategory(
-                            category["name"],
+                            category["name"], category["selector"]["selector"]
-                            CategorySelector(category["selector"]["selector"]),
                         )
 
                     transactions.append(transaction)
@@ -284,27 +298,21 @@ class Manager:
                     self.database.insert(transactions)
 
             case Operation.ExportBanks:
-                with self.database.session as session:
+                self.dump(params[0], params[1], self.database.select(Bank))
-                    self.dump(params[0], params[1], self.database.select(Bank, session))
 
             case Operation.ImportBanks:
                 banks = []
                 for row in self.load(params[0], params[1]):
                     bank = Bank(row["name"], row["BIC"], row["type"])
                     if row["nordigen"]:
-                        bank.nordigen = Nordigen(**row["nordigen"])
+                        bank.nordigen = NordigenBank(**row["nordigen"])
                     banks.append(bank)
 
                 if self.certify(banks):
                     self.database.insert(banks)
 
             case Operation.ExportCategoryRules:
-                with self.database.session as session:
+                self.dump(params[0], params[1], self.database.select(CategoryRule))
-                    self.dump(
-                        params[0],
-                        params[1],
-                        self.database.select(CategoryRule, session),
-                    )
 
             case Operation.ImportCategoryRules:
                 rules = [CategoryRule(**row) for row in self.load(params[0], params[1])]
@@ -313,10 +321,7 @@ class Manager:
                     self.database.insert(rules)
 
             case Operation.ExportTagRules:
-                with self.database.session as session:
+                self.dump(params[0], params[1], self.database.select(TagRule))
-                    self.dump(
-                        params[0], params[1], self.database.select(TagRule, session)
-                    )
 
             case Operation.ImportTagRules:
                 rules = [TagRule(**row) for row in self.load(params[0], params[1])]
@@ -325,10 +330,7 @@ class Manager:
                     self.database.insert(rules)
 
             case Operation.ExportCategories:
-                with self.database.session as session:
+                self.dump(params[0], params[1], self.database.select(Category))
-                    self.dump(
-                        params[0], params[1], self.database.select(Category, session)
-                    )
 
             case Operation.ImportCategories:
                 # rules = [Category(**row) for row in self.load(params[0])]
@@ -341,7 +343,7 @@ class Manager:
                         for rule in rules:
                             del rule["type"]
 
-                        category.rules = set(CategoryRule(**rule) for rule in rules)
+                        category.rules = [CategoryRule(**rule) for rule in rules]
                     if row["schedule"]:
                         category.schedule = CategorySchedule(**row["schedule"])
                     categories.append(category)
@@ -350,12 +352,7 @@ class Manager:
                     self.database.insert(categories)
 
             case Operation.ExportCategoryGroups:
-                with self.database.session as session:
+                self.dump(params[0], params[1], self.database.select(CategoryGroup))
-                    self.dump(
-                        params[0],
-                        params[1],
-                        self.database.select(CategoryGroup, session),
-                    )
 
             case Operation.ImportCategoryGroups:
                 groups = [
@@ -369,7 +366,7 @@ class Manager:
         return parse_data(filename, args)
 
     def askcategory(self, transaction: Transaction):
-        selector = CategorySelector(Selector_T.manual)
+        selector = CategorySelector.manual
 
         categories = self.database.select(Category)
 
@@ -383,9 +380,6 @@ class Manager:
         if format == "pickle":
             with open(fn, "wb") as f:
                 pickle.dump([e.format for e in sequence], f)
-        elif format == "csv":
-            with open(fn, "w", newline="") as f:
-                csv.writer(f).writerows([e.format.values() for e in sequence])
         elif format == "json":
             with open(fn, "w", newline="") as f:
                 json.dump([e.format for e in sequence], f, indent=4, default=str)
@@ -397,8 +391,6 @@ class Manager:
         if format == "pickle":
             with open(fn, "rb") as f:
                 return pickle.load(f)
-        elif format == "csv":
-            raise Exception("CSV import not supported")
         else:
             print("format not well specified")
             return []
@@ -415,6 +407,5 @@ class Manager:
             self._database = Client(self._db, echo=self._verbosity > 2)
         return self._database
 
-    @staticmethod
+    def nordigen_client(self) -> NordigenClient:
-    def nordigen_client() -> NordigenClient:
+        return NordigenClient(NordigenCredentialsManager.default, self.database)
-        return NordigenClient(NordigenCredentialsManager.default)

pfbudget/db/client.py

@@ -1,10 +1,11 @@
 from collections.abc import Sequence
 from copy import deepcopy
 from sqlalchemy import Engine, create_engine, delete, select, update
+from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm import Session, sessionmaker
 from typing import Any, Mapping, Optional, Type, TypeVar
 
-# from pfbudget.db.exceptions import InsertError, SelectError
+from pfbudget.db.exceptions import InsertError
 
 
 class DatabaseSession:
@@ -16,10 +17,17 @@ class DatabaseSession:
         return self
 
     def __exit__(self, exc_type: Any, exc_val: Any, exc_tb: Any):
-        if exc_type:
+        try:
-            self.__session.rollback()
+            if exc_type:
-        else:
+                self.__session.rollback()
-            self.__session.commit()
+            else:
+                self.__session.commit()
+        except IntegrityError as e:
+            raise InsertError() from e
+        finally:
+            self.__session.close()
+
+    def close(self):
         self.__session.close()
 
     def insert(self, sequence: Sequence[Any]) -> None:
@@ -33,7 +41,10 @@ class DatabaseSession:
         else:
             stmt = select(what)
 
-        return self.__session.scalars(stmt).all()
+        return self.__session.scalars(stmt).unique().all()
+
+    def delete(self, obj: Any) -> None:
+        self.__session.delete(obj)
 
 
 class Client:
@@ -50,13 +61,16 @@ class Client:
     T = TypeVar("T")
 
     def select(self, what: Type[T], exists: Optional[Any] = None) -> Sequence[T]:
-        return self.session.select(what, exists)
+        session = self.session
+        result = session.select(what, exists)
+        session.close()
+        return result
 
     def update(self, what: Type[Any], values: Sequence[Mapping[str, Any]]) -> None:
         with self._sessionmaker() as session, session.begin():
             session.execute(update(what), values)
 
-    def delete(self, what: Type[Any], column: Any, values: Sequence[str]) -> None:
+    def delete(self, what: Type[Any], column: Any, values: Sequence[Any]) -> None:
         with self._sessionmaker() as session, session.begin():
             session.execute(delete(what).where(column.in_(values)))
 

pfbudget/db/model.py

@@ -1,9 +1,11 @@
 from __future__ import annotations
+from collections.abc import Mapping, MutableMapping, Sequence
+from dataclasses import dataclass
 import datetime as dt
 import decimal
 import enum
 import re
-from typing import Annotated, Any, Optional
+from typing import Annotated, Any, Callable, Optional, Self, cast
 
 from sqlalchemy import (
     BigInteger,
@@ -36,6 +38,20 @@ class Base(MappedAsDataclass, DeclarativeBase):
         },
     )
 
+    type_annotation_map = {
+        enum.Enum: Enum(enum.Enum, create_constraint=True, inherit_schema=True),
+    }
+
+
+@dataclass
+class Serializable:
+    def serialize(self) -> Mapping[str, Any]:
+        return dict(class_=type(self).__name__)
+
+    @classmethod
+    def deserialize(cls, map: Mapping[str, Any]) -> Self:
+        raise NotImplementedError
+
 
 class AccountType(enum.Enum):
     checking = enum.auto()
@@ -46,36 +62,38 @@ class AccountType(enum.Enum):
     MASTERCARD = enum.auto()
 
 
-accounttype = Annotated[
+class Bank(Base, Serializable):
-    AccountType,
-    mapped_column(Enum(AccountType, inherit_schema=True)),
-]
-
-
-class Export:
-    @property
-    def format(self) -> dict[str, Any]:
-        raise NotImplementedError
-
-
-class Bank(Base, Export):
     __tablename__ = "banks"
 
     name: Mapped[str] = mapped_column(primary_key=True)
     BIC: Mapped[str] = mapped_column(String(8))
-    type: Mapped[accounttype]
+    type: Mapped[AccountType]
 
-    nordigen: Mapped[Optional[Nordigen]] = relationship(lazy="joined", init=False)
+    nordigen: Mapped[Optional[NordigenBank]] = relationship(default=None, lazy="joined")
 
-    @property
+    def serialize(self) -> Mapping[str, Any]:
-    def format(self) -> dict[str, Any]:
+        nordigen = None
-        return dict(
+        if self.nordigen:
+            nordigen = {
+                "bank_id": self.nordigen.bank_id,
+                "requisition_id": self.nordigen.requisition_id,
+                "invert": self.nordigen.invert,
+            }
+
+        return super().serialize() | dict(
             name=self.name,
             BIC=self.BIC,
-            type=self.type,
+            type=self.type.name,
-            nordigen=self.nordigen.format if self.nordigen else None,
+            nordigen=nordigen,
         )
 
+    @classmethod
+    def deserialize(cls, map: Mapping[str, Any]) -> Self:
+        bank = cls(map["name"], map["BIC"], map["type"])
+        if map["nordigen"]:
+            bank.nordigen = NordigenBank(**map["nordigen"])
+        return bank
+
 
 bankfk = Annotated[str, mapped_column(Text, ForeignKey(Bank.name))]
 
@@ -90,7 +108,7 @@ idpk = Annotated[
 money = Annotated[decimal.Decimal, mapped_column(Numeric(16, 2))]
 
 
-class Transaction(Base, Export):
+class Transaction(Base, Serializable):
     __tablename__ = "transactions"
 
     id: Mapped[idpk] = mapped_column(init=False)
@@ -98,32 +116,83 @@ class Transaction(Base, Export):
     description: Mapped[Optional[str]]
     amount: Mapped[money]
 
-    split: Mapped[bool] = mapped_column(init=False, default=False)
+    split: Mapped[bool] = mapped_column(default=False)
+
+    category: Mapped[Optional[TransactionCategory]] = relationship(
+        back_populates="transaction", default=None, lazy="joined"
+    )
+    tags: Mapped[set[TransactionTag]] = relationship(default_factory=set, lazy="joined")
+    note: Mapped[Optional[Note]] = relationship(
+        cascade="all, delete-orphan", passive_deletes=True, default=None, lazy="joined"
+    )
 
     type: Mapped[str] = mapped_column(init=False)
-
-    category: Mapped[Optional[TransactionCategory]] = relationship(init=False)
-    note: Mapped[Optional[Note]] = relationship(
-        cascade="all, delete-orphan", init=False, passive_deletes=True
-    )
-    tags: Mapped[set[TransactionTag]] = relationship(init=False)
-
     __mapper_args__ = {"polymorphic_on": "type", "polymorphic_identity": "transaction"}
 
-    @property
+    def serialize(self) -> Mapping[str, Any]:
-    def format(self) -> dict[str, Any]:
+        category = None
-        return dict(
+        if self.category:
+            category = {
+                "name": self.category.name,
+                "selector": self.category.selector.name,
+            }
+
+        return super().serialize() | dict(
             id=self.id,
-            date=self.date,
+            date=self.date.isoformat(),
             description=self.description,
-            amount=self.amount,
+            amount=str(self.amount),
             split=self.split,
+            category=category if category else None,
+            tags=[{"tag": tag.tag} for tag in self.tags],
+            note={"note": self.note.note} if self.note else None,
             type=self.type,
-            category=self.category.format if self.category else None,
-            # TODO note
-            tags=[tag.format for tag in self.tags] if self.tags else None,
         )
 
+    @classmethod
+    def deserialize(
+        cls, map: Mapping[str, Any]
+    ) -> Transaction | BankTransaction | MoneyTransaction | SplitTransaction:
+        match map["type"]:
+            case "bank":
+                return BankTransaction.deserialize(map)
+            case "money":
+                return MoneyTransaction.deserialize(map)
+            case "split":
+                return SplitTransaction.deserialize(map)
+            case _:
+                return cls._deserialize(map)
+
+    @classmethod
+    def _deserialize(cls, map: Mapping[str, Any]) -> Self:
+        category = None
+        if map["category"]:
+            category = TransactionCategory(map["category"]["name"])
+            if map["category"]["selector"]:
+                category.selector = map["category"]["selector"]
+
+        tags: set[TransactionTag] = set()
+        if map["tags"]:
+            tags = set(TransactionTag(t["tag"]) for t in map["tags"])
+
+        note = None
+        if map["note"]:
+            note = Note(map["note"]["note"])
+
+        result = cls(
+            dt.date.fromisoformat(map["date"]),
+            map["description"],
+            map["amount"],
+            map["split"],
+            category,
+            tags,
+            note,
+        )
+
+        if map["id"]:
+            result.id = map["id"]
+        return result
+
     def __lt__(self, other: Transaction):
         return self.date < other.date
 
@@ -134,40 +203,64 @@ idfk = Annotated[
 
 
 class BankTransaction(Transaction):
-    bank: Mapped[bankfk] = mapped_column(nullable=True)
+    bank: Mapped[Optional[bankfk]] = mapped_column(default=None)
 
     __mapper_args__ = {"polymorphic_identity": "bank", "polymorphic_load": "inline"}
 
-    @property
+    def serialize(self) -> Mapping[str, Any]:
-    def format(self) -> dict[str, Any]:
+        map = cast(MutableMapping[str, Any], super().serialize())
-        return super().format | dict(bank=self.bank)
+        map["bank"] = self.bank
+        return map
+
+    @classmethod
+    def deserialize(cls, map: Mapping[str, Any]) -> Self:
+        transaction = cls._deserialize(map)
+        transaction.bank = map["bank"]
+        return transaction
 
 
 class MoneyTransaction(Transaction):
     __mapper_args__ = {"polymorphic_identity": "money"}
 
+    def serialize(self) -> Mapping[str, Any]:
+        return super().serialize()
+
+    @classmethod
+    def deserialize(cls, map: Mapping[str, Any]) -> Self:
+        return cls._deserialize(map)
+
 
 class SplitTransaction(Transaction):
-    original: Mapped[idfk] = mapped_column(nullable=True)
+    original: Mapped[Optional[idfk]] = mapped_column(default=None)
 
     __mapper_args__ = {"polymorphic_identity": "split", "polymorphic_load": "inline"}
 
-    @property
+    def serialize(self) -> Mapping[str, Any]:
-    def format(self) -> dict[str, Any]:
+        map = cast(MutableMapping[str, Any], super().serialize())
-        return super().format | dict(original=self.original)
+        map["original"] = self.original
+        return map
+
+    @classmethod
+    def deserialize(cls, map: Mapping[str, Any]) -> Self:
+        transaction = cls._deserialize(map)
+        transaction.original = map["original"]
+        return transaction
 
 
-class CategoryGroup(Base, Export):
+class CategoryGroup(Base, Serializable):
     __tablename__ = "category_groups"
 
     name: Mapped[str] = mapped_column(primary_key=True)
 
-    @property
+    def serialize(self) -> Mapping[str, Any]:
-    def format(self) -> dict[str, Any]:
+        return super().serialize() | dict(name=self.name)
-        return dict(name=self.name)
+
+    @classmethod
+    def deserialize(cls, map: Mapping[str, Any]) -> Self:
+        return cls(map["name"])
 
 
-class Category(Base, Export):
+class Category(Base, Serializable, repr=False):
     __tablename__ = "categories"
 
     name: Mapped[str] = mapped_column(primary_key=True)
@@ -175,28 +268,75 @@ class Category(Base, Export):
         ForeignKey(CategoryGroup.name), default=None
     )
 
-    rules: Mapped[set[CategoryRule]] = relationship(
+    rules: Mapped[list[CategoryRule]] = relationship(
-        cascade="all, delete-orphan", passive_deletes=True, default_factory=set
+        cascade="all, delete-orphan",
+        passive_deletes=True,
+        default_factory=list,
+        lazy="joined",
     )
     schedule: Mapped[Optional[CategorySchedule]] = relationship(
-        cascade="all, delete-orphan", passive_deletes=True, default=None
+        cascade="all, delete-orphan", passive_deletes=True, default=None, lazy="joined"
     )
 
+    def serialize(self) -> Mapping[str, Any]:
+        rules: Sequence[Mapping[str, Any]] = []
+        for rule in self.rules:
+            rules.append(
+                {
+                    "start": rule.start.isoformat() if rule.start else None,
+                    "end": rule.end.isoformat() if rule.end else None,
+                    "description": rule.description,
+                    "regex": rule.regex,
+                    "bank": rule.bank,
+                    "min": str(rule.min) if rule.min is not None else None,
+                    "max": str(rule.max) if rule.max is not None else None,
+                }
+            )
+
+        schedule = None
+        if self.schedule:
+            schedule = {
+                "period": self.schedule.period.name if self.schedule.period else None,
+                "period_multiplier": self.schedule.period_multiplier,
+                "amount": self.schedule.amount,
+            }
+
+        return super().serialize() | dict(
+            name=self.name,
+            group=self.group,
+            rules=rules,
+            schedule=schedule,
+        )
+
+    @classmethod
+    def deserialize(cls, map: Mapping[str, Any]) -> Self:
+        rules: list[CategoryRule] = []
+        for rule in map["rules"]:
+            rules.append(
+                CategoryRule(
+                    dt.date.fromisoformat(rule["start"]) if rule["start"] else None,
+                    dt.date.fromisoformat(rule["end"]) if rule["end"] else None,
+                    rule["description"],
+                    rule["regex"],
+                    rule["bank"],
+                    rule["min"],
+                    rule["max"],
+                )
+            )
+
+        return cls(
+            map["name"],
+            map["group"],
+            rules,
+            CategorySchedule(**map["schedule"]) if map["schedule"] else None,
+        )
+
     def __repr__(self) -> str:
         return (
             f"Category(name={self.name}, group={self.group}, #rules={len(self.rules)},"
             f" schedule={self.schedule})"
         )
 
-    @property
-    def format(self) -> dict[str, Any]:
-        return dict(
-            name=self.name,
-            group=self.group if self.group else None,
-            rules=[rule.format for rule in self.rules],
-            schedule=self.schedule.format if self.schedule else None,
-        )
-
 
 catfk = Annotated[
     str,
@@ -204,21 +344,26 @@ catfk = Annotated[
 ]
 
 
-class TransactionCategory(Base, Export):
+class CategorySelector(enum.Enum):
+    unknown = enum.auto()
+    nullifier = enum.auto()
+    vacations = enum.auto()
+    rules = enum.auto()
+    algorithm = enum.auto()
+    manual = enum.auto()
+
+
+class TransactionCategory(Base):
     __tablename__ = "transactions_categorized"
 
     id: Mapped[idfk] = mapped_column(primary_key=True, init=False)
     name: Mapped[catfk]
 
-    selector: Mapped[CategorySelector] = relationship(
+    selector: Mapped[CategorySelector] = mapped_column(default=CategorySelector.unknown)
-        cascade="all, delete-orphan", lazy="joined"
-    )
 
-    @property
+    transaction: Mapped[Transaction] = relationship(
-    def format(self):
+        back_populates="category", init=False, compare=False
-        return dict(
+    )
-            name=self.name, selector=self.selector.format if self.selector else None
-        )
 
 
 class Note(Base):
@@ -228,106 +373,85 @@ class Note(Base):
     note: Mapped[str]
 
 
-class Nordigen(Base, Export):
+class NordigenBank(Base):
     __tablename__ = "banks_nordigen"
 
-    name: Mapped[bankfk] = mapped_column(primary_key=True)
+    name: Mapped[bankfk] = mapped_column(primary_key=True, init=False)
     bank_id: Mapped[Optional[str]]
     requisition_id: Mapped[Optional[str]]
-    invert: Mapped[Optional[bool]]
+    invert: Mapped[Optional[bool]] = mapped_column(default=None)
-
-    @property
-    def format(self) -> dict[str, Any]:
-        return dict(
-            name=self.name,
-            bank_id=self.bank_id,
-            requisition_id=self.requisition_id,
-            invert=self.invert,
-        )
 
 
-class Tag(Base):
+class Tag(Base, Serializable):
     __tablename__ = "tags"
 
     name: Mapped[str] = mapped_column(primary_key=True)
 
-    rules: Mapped[set[TagRule]] = relationship(
+    rules: Mapped[list[TagRule]] = relationship(
-        cascade="all, delete-orphan", passive_deletes=True, default_factory=set
+        cascade="all, delete-orphan",
+        passive_deletes=True,
+        default_factory=list,
+        lazy="joined",
     )
 
+    def serialize(self) -> Mapping[str, Any]:
+        rules: Sequence[Mapping[str, Any]] = []
+        for rule in self.rules:
+            rules.append(
+                {
+                    "start": rule.start,
+                    "end": rule.end,
+                    "description": rule.description,
+                    "regex": rule.regex,
+                    "bank": rule.bank,
+                    "min": str(rule.min) if rule.min is not None else None,
+                    "max": str(rule.max) if rule.max is not None else None,
+                }
+            )
 
-class TransactionTag(Base, Export):
+        return super().serialize() | dict(name=self.name, rules=rules)
+
+    @classmethod
+    def deserialize(cls, map: Mapping[str, Any]) -> Self:
+        rules: list[TagRule] = []
+        for rule in map["rules"]:
+            rules.append(
+                TagRule(
+                    dt.date.fromisoformat(rule["start"]) if rule["start"] else None,
+                    dt.date.fromisoformat(rule["end"]) if rule["end"] else None,
+                    rule["description"],
+                    rule["regex"],
+                    rule["bank"],
+                    rule["min"],
+                    rule["max"],
+                )
+            )
+
+        return cls(map["name"], rules)
+
+
+class TransactionTag(Base, unsafe_hash=True):
     __tablename__ = "transactions_tagged"
 
     id: Mapped[idfk] = mapped_column(primary_key=True, init=False)
     tag: Mapped[str] = mapped_column(ForeignKey(Tag.name), primary_key=True)
 
-    @property
-    def format(self):
-        return dict(tag=self.tag)
 
-    def __hash__(self):
+class SchedulePeriod(enum.Enum):
-        return hash(self.id)
+    daily = enum.auto()
+    weekly = enum.auto()
+    monthly = enum.auto()
+    yearly = enum.auto()
 
 
-class Selector_T(enum.Enum):
+class CategorySchedule(Base):
-    unknown = enum.auto()
-    nullifier = enum.auto()
-    vacations = enum.auto()
-    rules = enum.auto()
-    algorithm = enum.auto()
-    manual = enum.auto()
-
-
-categoryselector = Annotated[
-    Selector_T,
-    mapped_column(Enum(Selector_T, inherit_schema=True), default=Selector_T.unknown),
-]
-
-
-class CategorySelector(Base, Export):
-    __tablename__ = "category_selectors"
-
-    id: Mapped[int] = mapped_column(
-        BigInteger,
-        ForeignKey(TransactionCategory.id, ondelete="CASCADE"),
-        primary_key=True,
-        init=False,
-    )
-    selector: Mapped[categoryselector]
-
-    @property
-    def format(self):
-        return dict(selector=self.selector)
-
-
-class Period(enum.Enum):
-    daily = "daily"
-    weekly = "weekly"
-    monthly = "monthly"
-    yearly = "yearly"
-
-
-scheduleperiod = Annotated[Selector_T, mapped_column(Enum(Period, inherit_schema=True))]
-
-
-class CategorySchedule(Base, Export):
     __tablename__ = "category_schedules"
 
-    name: Mapped[catfk] = mapped_column(primary_key=True)
+    name: Mapped[catfk] = mapped_column(primary_key=True, init=False)
-    period: Mapped[Optional[scheduleperiod]]
+    period: Mapped[Optional[SchedulePeriod]]
     period_multiplier: Mapped[Optional[int]]
     amount: Mapped[Optional[int]]
 
-    @property
-    def format(self) -> dict[str, Any]:
-        return dict(
-            name=self.name,
-            period=self.period,
-            period_multiplier=self.period_multiplier,
-            amount=self.amount,
-        )
-
 
 class Link(Base):
     __tablename__ = "links"
@@ -336,17 +460,17 @@ class Link(Base):
     link: Mapped[idfk] = mapped_column(primary_key=True)
 
 
-class Rule(Base, Export):
+class Rule(Base):
     __tablename__ = "rules"
 
     id: Mapped[idpk] = mapped_column(init=False)
-    start: Mapped[Optional[dt.date]]
+    start: Mapped[Optional[dt.date]] = mapped_column(default=None)
-    end: Mapped[Optional[dt.date]]
+    end: Mapped[Optional[dt.date]] = mapped_column(default=None)
-    description: Mapped[Optional[str]]
+    description: Mapped[Optional[str]] = mapped_column(default=None)
-    regex: Mapped[Optional[str]]
+    regex: Mapped[Optional[str]] = mapped_column(default=None)
-    bank: Mapped[Optional[str]]
+    bank: Mapped[Optional[str]] = mapped_column(default=None)
-    min: Mapped[Optional[money]]
+    min: Mapped[Optional[money]] = mapped_column(default=None)
-    max: Mapped[Optional[money]]
+    max: Mapped[Optional[money]] = mapped_column(default=None)
 
     type: Mapped[str] = mapped_column(init=False)
 
@@ -361,16 +485,16 @@ class Rule(Base, Export):
             valid = re.compile(self.regex, re.IGNORECASE)
 
         ops = (
-            Rule.exists(self.start, lambda r: r < t.date),
+            Rule.exists(self.start, lambda r: t.date >= r),
-            Rule.exists(self.end, lambda r: r > t.date),
+            Rule.exists(self.end, lambda r: t.date <= r),
             Rule.exists(self.description, lambda r: r == t.description),
             Rule.exists(
                 valid,
                 lambda r: r.search(t.description) if t.description else False,
             ),
             Rule.exists(self.bank, lambda r: r == t.bank),
-            Rule.exists(self.min, lambda r: r < t.amount),
+            Rule.exists(self.min, lambda r: t.amount >= r),
-            Rule.exists(self.max, lambda r: r > t.amount),
+            Rule.exists(self.max, lambda r: t.amount <= r),
         )
 
         if all(ops):
@@ -378,21 +502,8 @@ class Rule(Base, Export):
 
         return False
 
-    @property
-    def format(self) -> dict[str, Any]:
-        return dict(
-            start=self.start,
-            end=self.end,
-            description=self.description,
-            regex=self.regex,
-            bank=self.bank,
-            min=self.min,
-            max=self.max,
-            type=self.type,
-        )
-
     @staticmethod
-    def exists(r, op) -> bool:
+    def exists(r: Optional[Any], op: Callable[[Any], bool]) -> bool:
         return op(r) if r is not None else True
 
 
@@ -405,19 +516,13 @@ class CategoryRule(Rule):
         primary_key=True,
         init=False,
     )
-    name: Mapped[catfk]
+    name: Mapped[catfk] = mapped_column(init=False)
 
     __mapper_args__ = {
         "polymorphic_identity": "category_rule",
+        "polymorphic_load": "selectin",
     }
 
-    @property
-    def format(self) -> dict[str, Any]:
-        return super().format | dict(name=self.name)
-
-    def __hash__(self):
-        return hash(self.id)
-
 
 class TagRule(Rule):
     __tablename__ = "tag_rules"
@@ -428,15 +533,19 @@ class TagRule(Rule):
         primary_key=True,
         init=False,
     )
-    tag: Mapped[str] = mapped_column(ForeignKey(Tag.name, ondelete="CASCADE"))
+    tag: Mapped[str] = mapped_column(
+        ForeignKey(Tag.name, ondelete="CASCADE"), init=False
+    )
 
     __mapper_args__ = {
         "polymorphic_identity": "tag_rule",
+        "polymorphic_load": "selectin",
     }
 
-    @property
-    def format(self) -> dict[str, Any]:
-        return super().format | dict(tag=self.tag)
 
-    def __hash__(self):
+class Nordigen(Base):
-        return hash(self.id)
+    __tablename__ = "nordigen"
+
+    type: Mapped[str] = mapped_column(primary_key=True)
+    token: Mapped[str]
+    expires: Mapped[dt.datetime]

pfbudget/extract/nordigen.py

@@ -1,12 +1,16 @@
 from dataclasses import dataclass
+import datetime as dt
 import dotenv
-import json
 import nordigen
 import os
 import requests
 import time
+from typing import Any, Optional, Sequence, Tuple
 import uuid
 
+from pfbudget.db.client import Client
+from pfbudget.db.model import Nordigen
+
 from .exceptions import CredentialsError, DownloadError
 
 dotenv.load_dotenv()
@@ -16,40 +20,38 @@ dotenv.load_dotenv()
 class NordigenCredentials:
     id: str
     key: str
-    token: str = ""
 
     def valid(self) -> bool:
-        return self.id and self.key
+        return len(self.id) != 0 and len(self.key) != 0
 
 
 class NordigenClient:
     redirect_url = "https://murta.dev"
 
-    def __init__(self, credentials: NordigenCredentials):
+    def __init__(self, credentials: NordigenCredentials, client: Client):
-        super().__init__()
-
         if not credentials.valid():
             raise CredentialsError
 
-        self._client = nordigen.NordigenClient(
+        self.__client = nordigen.NordigenClient(
             secret_key=credentials.key, secret_id=credentials.id, timeout=5
         )
+        self.__client.token = self.__token(client)
 
-        if credentials.token:
+    def download(self, requisition_id) -> Sequence[dict[str, Any]]:
-            self._client.token = credentials.token
-
-    def download(self, requisition_id):
         try:
-            requisition = self._client.requisition.get_requisition_by_id(requisition_id)
+            requisition = self.__client.requisition.get_requisition_by_id(
+                requisition_id
+            )
             print(requisition)
         except requests.HTTPError as e:
             raise DownloadError(e)
 
-        transactions = {}
+        transactions = []
         for acc in requisition["accounts"]:
-            account = self._client.account_api(acc)
+            account = self.__client.account_api(acc)
 
             retries = 0
+            downloaded = None
             while retries < 3:
                 try:
                     downloaded = account.get_transactions()
@@ -60,55 +62,93 @@ class NordigenClient:
                     time.sleep(1)
 
             if not downloaded:
-                print(f"Couldn't download transactions for {account}")
+                print(f"Couldn't download transactions for {account.get_metadata()}")
                 continue
 
-            transactions.update(downloaded)
+            if (
+                "transactions" not in downloaded
+                or "booked" not in downloaded["transactions"]
+            ):
+                print(f"{account} doesn't have transactions")
+                continue
+
+            transactions.extend(downloaded["transactions"]["booked"])
 
         return transactions
 
     def dump(self, bank, downloaded):
-        with open("json/" + bank.name + ".json", "w") as f:
+        # @TODO log received JSON
-            json.dump(downloaded, f)
+        pass
 
-    def generate_token(self):
+    def new_requisition(
-        self.token = self._client.generate_token()
+        self,
-        print(f"New access token: {self.token}")
+        institution_id: str,
-        return self.token
+        max_historical_days: Optional[int] = None,
+        access_valid_for_days: Optional[int] = None,
+    ) -> Tuple[str, str]:
+        kwargs = {
+            "max_historical_days": max_historical_days,
+            "access_valid_for_days": access_valid_for_days,
+        }
+        kwargs = {k: v for k, v in kwargs.items() if v is not None}
 
-    def requisition(self, id: str, country: str = "PT"):
+        req = self.__client.initialize_session(
-        requisition = self._client.initialize_session(
+            self.redirect_url, institution_id, str(uuid.uuid4()), **kwargs
-            redirect_uri=self.redirect_url,
-            institution_id=id,
-            reference_id=str(uuid.uuid4()),
         )
-        return requisition.link, requisition.requisition_id
+        return req.link, req.requisition_id
 
     def country_banks(self, country: str):
-        return self._client.institution.get_institutions(country)
+        return self.__client.institution.get_institutions(country)
 
-    # def __token(self):
+    def __token(self, client: Client) -> str:
-    #     if token := os.environ.get("TOKEN"):
+        with client.session as session:
-    #         return token
+            token = session.select(Nordigen)
-    #     else:
-    #         token = self._client.generate_token()
-    #         print(f"New access token: {token}")
-    #         return token["access"]
 
-    @property
+            def datetime(seconds: int) -> dt.datetime:
-    def token(self):
+                return dt.datetime.now() + dt.timedelta(seconds=seconds)
-        return self._token
 
-    @token.setter
+            if not len(token):
-    def token(self, value):
+                print("First time nordigen token setup")
-        if self._token:
+                new = self.__client.generate_token()
-            print("Replacing existing token with {value}")
+                session.insert(
-        self._token = value
+                    [
+                        Nordigen(
+                            "access",
+                            new["access"],
+                            datetime(new["access_expires"]),
+                        ),
+                        Nordigen(
+                            "refresh",
+                            new["refresh"],
+                            datetime(new["refresh_expires"]),
+                        ),
+                    ]
+                )
+
+                return new["access"]
+
+            else:
+                access = next(t for t in token if t.type == "access")
+                refresh = next(t for t in token if t.type == "refresh")
+
+                if access.expires > dt.datetime.now():
+                    pass
+                elif refresh.expires > dt.datetime.now():
+                    new = self.__client.exchange_token(refresh.token)
+                    access.token = new["access"]
+                    access.expires = datetime(new["access_expires"])
+                else:
+                    new = self.__client.generate_token()
+                    access.token = new["access"]
+                    access.expires = datetime(new["access_expires"])
+                    refresh.token = new["refresh"]
+                    refresh.expires = datetime(new["refresh_expires"])
+
+                return access.token
 
 
 class NordigenCredentialsManager:
     default = NordigenCredentials(
-        os.environ.get("SECRET_ID"),
+        os.environ.get("SECRET_ID", ""),
-        os.environ.get("SECRET_KEY"),
+        os.environ.get("SECRET_KEY", ""),
-        os.environ.get("TOKEN"),
     )

pfbudget/extract/parsers.py

@@ -1,58 +1,45 @@
-from collections import namedtuple
+from __future__ import annotations
 from decimal import Decimal
 from importlib import import_module
 from pathlib import Path
 import datetime as dt
+from typing import Any, Callable, NamedTuple, Optional
 import yaml
 
 from pfbudget.common.types import NoBankSelected
-from pfbudget.db.model import Transaction
+from pfbudget.db.model import BankTransaction
 from pfbudget.utils import utils
 
-Index = namedtuple(
+
-    "Index", ["date", "text", "value", "negate"], defaults=[-1, -1, -1, False]
+class Index(NamedTuple):
-)
+    date: int = -1
-Options = namedtuple(
+    text: int = -1
-    "Options",
+    value: int = -1
-    [
+    negate: bool = False
-        "encoding",
-        "separator",
-        "date_fmt",
-        "start",
-        "end",
-        "debit",
-        "credit",
-        "additional_parser",
-        "category",
-        "VISA",
-        "MasterCard",
-        "AmericanExpress",
-    ],
-    defaults=[
-        "",
-        "",
-        "",
-        1,
-        None,
-        Index(),
-        Index(),
-        False,
-        None,
-        None,
-        None,
-        None,
-    ],
-)
 
 
-def parse_data(filename: Path, args: dict) -> list[Transaction]:
+class Options(NamedTuple):
-    cfg: dict = yaml.safe_load(open("parsers.yaml"))
+    encoding: str
+    separator: str
+    date_fmt: str
+    start: int = 1
+    end: Optional[int] = None
+    debit: Index = Index()
+    credit: Index = Index()
+    additional_parser: bool = False
+    VISA: Optional[Options] = None
+    MasterCard: Optional[Options] = None
+    AmericanExpress: Optional[Options] = None
+
+
+def parse_data(filename: Path, args: dict[str, Any]) -> list[BankTransaction]:
+    cfg: dict[str, Any] = yaml.safe_load(open("parsers.yaml"))
     assert (
         "Banks" in cfg
     ), "parsers.yaml is missing the Banks section with the list of available banks"
 
     if not args["bank"]:
-        bank, creditcard = utils.find_credit_institution(
+        bank, creditcard = utils.find_credit_institution(  # type: ignore
             filename, cfg.get("Banks"), cfg.get("CreditCards")
         )
     else:
@@ -60,7 +47,7 @@ def parse_data(filename: Path, args: dict) -> list[Transaction]:
         creditcard = None if not args["creditcard"] else args["creditcard"][0]
 
     try:
-        options: dict = cfg[bank]
+        options: dict[str, Any] = cfg[bank]
     except KeyError as e:
         banks = cfg["Banks"]
         raise NoBankSelected(f"{e} not a valid bank, try one of {banks}")
@@ -73,9 +60,6 @@ def parse_data(filename: Path, args: dict) -> list[Transaction]:
             raise NoBankSelected(f"{e} not a valid bank, try one of {creditcards}")
         bank += creditcard
 
-    if args["category"]:
-        options["category"] = args["category"][0]
-
     if options.get("additional_parser"):
         parser = getattr(import_module("pfbudget.extract.parsers"), bank)
         transactions = parser(filename, bank, options).parse()
@@ -86,7 +70,7 @@ def parse_data(filename: Path, args: dict) -> list[Transaction]:
 
 
 class Parser:
-    def __init__(self, filename: Path, bank: str, options: dict):
+    def __init__(self, filename: Path, bank: str, options: dict[str, Any]):
         self.filename = filename
         self.bank = bank
 
@@ -97,10 +81,10 @@ class Parser:
 
         self.options = Options(**options)
 
-    def func(self, transaction: Transaction):
+    def func(self, transaction: BankTransaction):
         pass
 
-    def parse(self) -> list[Transaction]:
+    def parse(self) -> list[BankTransaction]:
         transactions = [
             Parser.transaction(line, self.bank, self.options, self.func)
             for line in list(open(self.filename, encoding=self.options.encoding))[
@@ -111,7 +95,8 @@ class Parser:
         return transactions
 
     @staticmethod
-    def index(line: list, options: Options) -> Index:
+    def index(line: list[str], options: Options) -> Index:
+        index = None
         if options.debit.date != -1 and options.credit.date != -1:
             if options.debit.value != options.credit.value:
                 if line[options.debit.value]:
@@ -138,49 +123,57 @@ class Parser:
         else:
             raise IndexError("No debit not credit indexes available")
 
-        return index
+        return index if index else Index()
 
     @staticmethod
-    def transaction(line: str, bank: str, options: Options, func) -> Transaction:
+    def transaction(
-        line = line.rstrip().split(options.separator)
+        line_: str, bank: str, options: Options, func: Callable[[BankTransaction], None]
+    ) -> BankTransaction:
+        line = line_.rstrip().split(options.separator)
         index = Parser.index(line, options)
 
-        date = (
+        try:
-            dt.datetime.strptime(line[index.date].strip(), options.date_fmt)
+            date_str = line[index.date].strip()
-            .date()
+            date = dt.datetime.strptime(date_str, options.date_fmt).date()
-            .isoformat()
-        )
-        text = line[index.text]
-        value = utils.parse_decimal(line[index.value])
-        if index.negate:
-            value = -value
 
-        if options.category:
+            text = line[index.text]
-            category = line[options.category]
-            transaction = Transaction(date, text, bank, value, category)
-        else:
-            transaction = Transaction(date, text, bank, value)
 
-        if options.additional_parser:
+            value = utils.parse_decimal(line[index.value])
-            func(transaction)
+            if index.negate:
-        return transaction
+                value = -value
+
+            transaction = BankTransaction(date, text, value, bank=bank)
+
+            if options.additional_parser:
+                func(transaction)
+
+            return transaction
+
+        except IndexError:
+            raise IndexError(line_)
 
 
 class Bank1(Parser):
-    def __init__(self, filename: str, bank: str, options: dict):
+    def __init__(self, filename: Path, bank: str, options: dict[str, Any]):
         super().__init__(filename, bank, options)
-        self.transfers = []
+        self.transfers: list[dt.date] = []
         self.transaction_cost = -Decimal("1")
 
-    def func(self, transaction: Transaction):
+    def func(self, transaction: BankTransaction):
-        if "transf" in transaction.description.lower() and transaction.value < 0:
+        if (
-            transaction.value -= self.transaction_cost
+            transaction.description
+            and "transf" in transaction.description.lower()
+            and transaction.amount < 0
+        ):
+            transaction.amount -= self.transaction_cost
             self.transfers.append(transaction.date)
 
-    def parse(self) -> list:
+    def parse(self) -> list[BankTransaction]:
         transactions = super().parse()
         for date in self.transfers:
             transactions.append(
-                Transaction(date, "Transaction cost", self.bank, self.transaction_cost)
+                BankTransaction(
+                    date, "Transaction cost", self.transaction_cost, bank=self.bank
+                )
             )
         return transactions

pfbudget/extract/psd2.py

@@ -35,4 +35,4 @@ class PSD2Extractor(Extractor):
         ]
 
     def convert(self, bank, downloaded, start, end):
-        return [convert(t, bank) for t in downloaded["transactions"]["booked"]]
+        return [convert(t, bank) for t in downloaded]

pfbudget/transform/categorizer.py

@@ -4,11 +4,10 @@ from typing import Iterable, Sequence
 from pfbudget.db.model import (
     CategoryRule,
     CategorySelector,
-    Selector_T,
     Transaction,
     TransactionCategory,
+    TransactionTag,
 )
-from .exceptions import TransactionCategorizedError
 from .transform import Transformer
 
 
@@ -25,12 +24,15 @@ class Categorizer(Transformer):
     def transform_inplace(self, transactions: Sequence[Transaction]) -> None:
         for rule in self.rules:
             for transaction in transactions:
-                if transaction.category:
-                    raise TransactionCategorizedError(transaction)
-
                 if not rule.matches(transaction):
                     continue
 
-                transaction.category = TransactionCategory(
+                if not transaction.category:
-                    rule.name, CategorySelector(Selector_T.rules)
+                    transaction.category = TransactionCategory(
-                )
+                        rule.name, CategorySelector.rules
+                    )
+                else:
+                    if not transaction.tags:
+                        transaction.tags = {TransactionTag(rule.name)}
+                    else:
+                        transaction.tags.add(TransactionTag(rule.name))

pfbudget/transform/exceptions.py

@@ -1,6 +1,2 @@
 class MoreThanOneMatchError(Exception):
     pass
-
-
-class TransactionCategorizedError(Exception):
-    pass

pfbudget/transform/nullifier.py

@@ -6,7 +6,6 @@ from .exceptions import MoreThanOneMatchError
 from .transform import Transformer
 from pfbudget.db.model import (
     CategorySelector,
-    Selector_T,
     Transaction,
     TransactionCategory,
 )
@@ -16,7 +15,7 @@ class Nullifier(Transformer):
     NULL_DAYS = 4
 
     def __init__(self, rules=None):
-        self.rules = rules
+        self.rules = rules if rules else []
 
     def transform(self, transactions: Sequence[Transaction]) -> Sequence[Transaction]:
         """transform
@@ -89,6 +88,6 @@ class Nullifier(Transformer):
 
     def _nullify(self, transaction: Transaction) -> Transaction:
         transaction.category = TransactionCategory(
-            "null", selector=CategorySelector(Selector_T.nullifier)
+            "null", selector=CategorySelector.nullifier
         )
         return transaction

pyproject.toml

@@ -8,17 +8,16 @@ readme = "README.md"
 packages = [{include = "pfbudget"}]
 
 [tool.poetry.dependencies]
-python = "^3.10"
+python = "^3.11"
 codetiming = "^1.4.0"
 matplotlib = "^3.7.1"
 nordigen = "^1.3.1"
-psycopg2 = {extras = ["binary"], version = "^2.9.6"}
+psycopg2 = "^2.9.6"
 python-dateutil = "^2.8.2"
 python-dotenv = "^1.0.0"
 pyyaml = "^6.0"
 sqlalchemy = "^2.0.9"
 
-
 [tool.poetry.group.dev.dependencies]
 alembic = "^1.10.3"
 black = "^23.3.0"
@@ -28,11 +27,15 @@ pytest = "^7.3.0"
 pytest-cov = "^4.0.0"
 pytest-mock = "^3.10.0"
 sqlalchemy = {extras = ["mypy"], version = "^2.0.9"}
+ruff = "^0.0.267"
 
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
 
+[tool.pytest.ini_options]
+pythonpath = ". tests"
+
 [pytest]
 mock_use_standalone_module = true
 

tests/mocks/banks.py

@@ -0,0 +1,8 @@
+from pfbudget.db.model import AccountType, Bank, NordigenBank
+
+
+checking = Bank(
+    "bank", "BANK", AccountType.checking, NordigenBank("bank_id", "requisition_id")
+)
+
+cc = Bank("cc", "CC", AccountType.MASTERCARD)

tests/mocks/categories.py

@@ -1,15 +1,21 @@
 from decimal import Decimal
 
-from pfbudget.db.model import Category, CategoryRule, Tag, TagRule
+from pfbudget.db.model import Category, CategoryGroup, CategoryRule, Tag, TagRule
 
-category_null = Category("null", None, set())
+category_null = Category("null")
+
+categorygroup1 = CategoryGroup("group#1")
 
 category1 = Category(
     "cat#1",
-    None,
+    "group#1",
-    {CategoryRule(None, None, "desc#1", None, None, None, Decimal(0), "cat#1")},
+    rules=[CategoryRule(description="desc#1", max=Decimal(0))],
 )
 
-tag_1 = Tag(
+category2 = Category(
-    "tag#1", {TagRule(None, None, "desc#1", None, None, None, Decimal(0), "tag#1")}
+    "cat#2",
+    "group#1",
+    rules=[CategoryRule(description="desc#1", max=Decimal(0))],
 )
+
+tag_1 = Tag("tag#1", rules=[TagRule(description="desc#1", max=Decimal(0))])

tests/mocks/client.py

@@ -0,0 +1,22 @@
+import datetime as dt
+
+from pfbudget.db.client import Client
+from pfbudget.db.model import Base, Nordigen
+
+
+class MockClient(Client):
+    now = dt.datetime.now()
+
+    def __init__(self):
+        url = "sqlite://"
+        super().__init__(
+            url, execution_options={"schema_translate_map": {"pfbudget": None}}
+        )
+        Base.metadata.create_all(self.engine)
+
+        self.insert(
+            [
+                Nordigen("access", "token#1", self.now + dt.timedelta(days=1)),
+                Nordigen("refresh", "token#2", self.now + dt.timedelta(days=30)),
+            ]
+        )

tests/mocks/nordigen.py

@@ -1,3 +1,11 @@
+from typing import Any, Dict, List, Optional
+import nordigen
+from nordigen.types.http_enums import HTTPMethod
+from nordigen.types.types import RequisitionDto, TokenType
+
+from pfbudget.extract.nordigen import NordigenCredentials
+
+
 id = "3fa85f64-5717-4562-b3fc-2c963f66afa6"
 
 accounts_id = {
@@ -10,6 +18,7 @@ accounts_id = {
     "owner_name": "string",
 }
 
+# The downloaded transactions match the simple and simple_transformed mocks
 accounts_id_transactions = {
     "transactions": {
         "booked": [
@@ -80,3 +89,58 @@ requisitions_id = {
     "account_selection": False,
     "redirect_immediate": False,
 }
+
+credentials = NordigenCredentials("ID", "KEY")
+
+
+class MockNordigenClient(nordigen.NordigenClient):
+    def __init__(
+        self,
+        secret_key: str = "ID",
+        secret_id: str = "KEY",
+        timeout: int = 10,
+        base_url: str = "https://ob.nordigen.com/api/v2",
+    ) -> None:
+        super().__init__(secret_key, secret_id, timeout, base_url)
+
+    def generate_token(self) -> TokenType:
+        return {
+            "access": "access_token",
+            "refresh": "refresh_token",
+            "access_expires": 86400,
+            "refresh_expires": 2592000,
+        }
+
+    def exchange_token(self, refresh_token: str) -> TokenType:
+        assert len(refresh_token) > 0, "invalid refresh token"
+        return {
+            "access": "access_token",
+            "refresh": "refresh_token",
+            "access_expires": 86400,
+            "refresh_expires": 2592000,
+        }
+
+    def request(
+        self,
+        method: HTTPMethod,
+        endpoint: str,
+        data: Optional[Dict[str, Any]] = None,
+        headers: Optional[Dict[str, Any]] = None,
+    ) -> Any:
+        if endpoint == "requisitions/" + "requisition_id" + "/":
+            return requisitions_id
+        elif endpoint == "accounts/" + id + "/transactions/":
+            return accounts_id_transactions
+        else:
+            raise NotImplementedError(endpoint)
+
+    def initialize_session(
+        self,
+        redirect_uri: str,
+        institution_id: str,
+        reference_id: str,
+        max_historical_days: int = 90,
+        access_valid_for_days: int = 90,
+        access_scope: List[str] | None = None,
+    ) -> RequisitionDto:
+        return RequisitionDto("http://random", "requisition_id")

tests/mocks/transactions.py

@@ -0,0 +1,73 @@
+from datetime import date
+from decimal import Decimal
+
+from pfbudget.db.model import (
+    BankTransaction,
+    CategorySelector,
+    MoneyTransaction,
+    Note,
+    SplitTransaction,
+    Transaction,
+    TransactionCategory,
+    TransactionTag,
+)
+
+# The simple and simple_transformed match the nordigen mocks
+simple = [
+    BankTransaction(date(2023, 1, 14), "string", Decimal("328.18"), bank="bank"),
+    BankTransaction(date(2023, 2, 14), "string", Decimal("947.26"), bank="bank"),
+]
+
+simple_transformed = [
+    BankTransaction(
+        date(2023, 1, 14),
+        "",
+        Decimal("328.18"),
+        bank="bank",
+        category=TransactionCategory("category#1", CategorySelector.algorithm),
+    ),
+    BankTransaction(
+        date(2023, 2, 14),
+        "",
+        Decimal("947.26"),
+        bank="bank",
+        category=TransactionCategory("category#2", CategorySelector.algorithm),
+    ),
+]
+
+bank = [
+    BankTransaction(date(2023, 1, 1), "", Decimal("-10"), bank="bank#1"),
+    BankTransaction(date(2023, 1, 1), "", Decimal("-10"), bank="bank#2"),
+]
+
+money = [
+    MoneyTransaction(date(2023, 1, 1), "", Decimal("-10")),
+    MoneyTransaction(date(2023, 1, 1), "", Decimal("-10")),
+]
+
+__original = Transaction(date(2023, 1, 1), "", Decimal("-10"), split=True)
+__original.id = 9000
+
+split = [
+    __original,
+    SplitTransaction(date(2023, 1, 1), "", Decimal("-5"), original=__original.id),
+    SplitTransaction(date(2023, 1, 1), "", Decimal("-5"), original=__original.id),
+]
+
+tagged = [
+    Transaction(
+        date(2023, 1, 1),
+        "",
+        Decimal("-10"),
+        tags={TransactionTag("tag#1"), TransactionTag("tag#1")},
+    )
+]
+
+noted = [
+    Transaction(
+        date(2023, 1, 1),
+        "",
+        Decimal("-10"),
+        note=Note("note#1"),
+    )
+]

tests/test_backup.py

@@ -0,0 +1,144 @@
+from pathlib import Path
+from typing import Any, Sequence, Type
+import pytest
+
+from mocks import banks, categories, transactions
+from mocks.client import MockClient
+
+from pfbudget.common.types import ExportFormat
+from pfbudget.core.command import (
+    BackupCommand,
+    ExportCommand,
+    ImportBackupCommand,
+    ImportCommand,
+    ImportFailedError,
+)
+from pfbudget.db.client import Client
+from pfbudget.db.model import (
+    Bank,
+    BankTransaction,
+    Base,
+    Category,
+    CategoryGroup,
+    MoneyTransaction,
+    Note,
+    SplitTransaction,
+    Tag,
+    Transaction,
+    TransactionCategory,
+    TransactionTag,
+)
+
+
+@pytest.fixture
+def client() -> Client:
+    return MockClient()
+
+
+params = [
+    (transactions.simple, Transaction),
+    (transactions.simple_transformed, Transaction),
+    (transactions.bank, Transaction),
+    (transactions.bank, BankTransaction),
+    (transactions.money, Transaction),
+    (transactions.money, MoneyTransaction),
+    (transactions.split, SplitTransaction),
+    ([banks.checking, banks.cc], Bank),
+    ([categories.category_null, categories.category1, categories.category2], Category),
+    (
+        [
+            categories.categorygroup1,
+            categories.category_null,
+            categories.category1,
+            categories.category2,
+        ],
+        CategoryGroup,
+    ),
+    ([categories.tag_1], Tag),
+]
+
+not_serializable = [
+    (transactions.simple_transformed, TransactionCategory),
+    (transactions.tagged, TransactionTag),
+    (transactions.noted, Note),
+]
+
+
+class TestBackup:
+    @pytest.mark.parametrize("input, what", params)
+    def test_import(self, tmp_path: Path, input: Sequence[Any], what: Type[Any]):
+        file = tmp_path / "test.json"
+
+        client = MockClient()
+        client.insert(input)
+        originals = client.select(what)
+
+        assert originals
+
+        command = ExportCommand(client, what, file, ExportFormat.JSON)
+        command.execute()
+
+        other = MockClient()
+        command = ImportCommand(other, what, file, ExportFormat.JSON)
+        command.execute()
+
+        imported = other.select(what)
+
+        assert originals == imported
+
+        command = ExportCommand(client, what, file, ExportFormat.pickle)
+        with pytest.raises(AttributeError):
+            command.execute()
+
+        command = ImportCommand(other, what, file, ExportFormat.pickle)
+        with pytest.raises(AttributeError):
+            command.execute()
+
+    @pytest.mark.parametrize("input, what", not_serializable)
+    def test_try_backup_not_serializable(
+        self, tmp_path: Path, input: Sequence[Any], what: Type[Any]
+    ):
+        file = tmp_path / "test.json"
+
+        client = MockClient()
+        client.insert(input)
+        originals = client.select(what)
+        assert originals
+
+        command = ExportCommand(client, what, file, ExportFormat.JSON)
+
+        with pytest.raises(AttributeError):
+            command.execute()
+
+        other = MockClient()
+        command = ImportCommand(other, what, file, ExportFormat.JSON)
+
+        with pytest.raises(ImportFailedError):
+            command.execute()
+
+        imported = other.select(what)
+        assert not imported
+
+    def test_full_backup(self, tmp_path: Path):
+        file = tmp_path / "test.json"
+
+        client = MockClient()
+        client.insert([e for t in params for e in t[0]])
+
+        command = BackupCommand(client, file, ExportFormat.JSON)
+        command.execute()
+
+        other = MockClient()
+        command = ImportBackupCommand(other, file, ExportFormat.JSON)
+        command.execute()
+
+        def subclasses(cls: Type[Any]) -> set[Type[Any]]:
+            return set(cls.__subclasses__()) | {
+                s for c in cls.__subclasses__() for s in subclasses(c)
+            }
+
+        for t in [cls for cls in subclasses(Base)]:
+            originals = client.select(t)
+            imported = other.select(t)
+
+            assert originals == imported, f"{t}"

tests/test_command.py

@@ -0,0 +1,54 @@
+import json
+from pathlib import Path
+import pytest
+
+from mocks.client import MockClient
+import mocks.transactions
+
+from pfbudget.common.types import ExportFormat
+from pfbudget.core.command import ExportCommand, ImportCommand
+from pfbudget.db.client import Client
+from pfbudget.db.exceptions import InsertError
+from pfbudget.db.model import Transaction
+
+
+@pytest.fixture
+def client() -> Client:
+    return MockClient()
+
+
+class TestCommand:
+    def test_export_json(self, tmp_path: Path, client: Client):
+        file = tmp_path / "test.json"
+        client.insert(mocks.transactions.simple)
+
+        command = ExportCommand(client, Transaction, file, ExportFormat.JSON)
+        command.execute()
+
+        with open(file, newline="") as f:
+            result = json.load(f)
+            assert result == [t.serialize() for t in client.select(Transaction)]
+
+    def test_export_pickle(self, tmp_path: Path, client: Client):
+        file = tmp_path / "test.pickle"
+        command = ExportCommand(client, Transaction, file, ExportFormat.pickle)
+        with pytest.raises(AttributeError):
+            command.execute()
+
+    def test_import_json(self, tmp_path: Path, client: Client):
+        file = tmp_path / "test"
+        client.insert(mocks.transactions.simple)
+
+        command = ExportCommand(client, Transaction, file, ExportFormat.JSON)
+        command.execute()
+
+        # Since the transactions are already in the DB, we expect an insert error
+        with pytest.raises(InsertError):
+            command = ImportCommand(client, Transaction, file, ExportFormat.JSON)
+            command.execute()
+
+    def test_import_pickle(self, tmp_path: Path, client: Client):
+        file = tmp_path / "test"
+        command = ExportCommand(client, Transaction, file, ExportFormat.pickle)
+        with pytest.raises(AttributeError):
+            command.execute()

tests/test_database.py

@@ -2,14 +2,14 @@ from datetime import date
 from decimal import Decimal
 import pytest
 
+from mocks.client import MockClient
+
 from pfbudget.db.client import Client
 from pfbudget.db.model import (
     AccountType,
     Bank,
-    Base,
+    NordigenBank,
     CategorySelector,
-    Nordigen,
-    Selector_T,
     Transaction,
     TransactionCategory,
 )
@@ -17,20 +17,21 @@ from pfbudget.db.model import (
 
 @pytest.fixture
 def client() -> Client:
-    url = "sqlite://"
+    return MockClient()
-    client = Client(url, execution_options={"schema_translate_map": {"pfbudget": None}})
-    Base.metadata.create_all(client.engine)
-    return client
 
 
 @pytest.fixture
 def banks(client: Client) -> list[Bank]:
     banks = [
-        Bank("bank", "BANK", AccountType.checking),
+        Bank("bank", "BANK", AccountType.checking, NordigenBank(None, "req", None)),
         Bank("broker", "BROKER", AccountType.investment),
         Bank("creditcard", "CC", AccountType.MASTERCARD),
     ]
-    banks[0].nordigen = Nordigen("bank", None, "req", None)
+
+    # fix nordigen bank names which would be generated post DB insert
+    for bank in banks:
+        if bank.nordigen:
+            bank.nordigen.name = bank.name
 
     client.insert(banks)
     return banks
@@ -39,19 +40,22 @@ def banks(client: Client) -> list[Bank]:
 @pytest.fixture
 def transactions(client: Client) -> list[Transaction]:
     transactions = [
-        Transaction(date(2023, 1, 1), "", Decimal("-10")),
+        Transaction(
+            date(2023, 1, 1),
+            "",
+            Decimal("-10"),
+            category=TransactionCategory("category", CategorySelector.algorithm),
+        ),
         Transaction(date(2023, 1, 2), "", Decimal("-50")),
     ]
-    transactions[0].category = TransactionCategory(
-        "name", CategorySelector(Selector_T.algorithm)
-    )
 
     client.insert(transactions)
+
+    # fix ids which would be generated post DB insert
     for i, transaction in enumerate(transactions):
         transaction.id = i + 1
-        transaction.split = False  # default
+        if transaction.category:
-    transactions[0].category.id = 1
+            transaction.category.id = 1
-    transactions[0].category.selector.id = 1
 
     return transactions
 
@@ -121,13 +125,13 @@ class TestDatabase:
     def test_update_nordigen(self, client: Client, banks: list[Bank]):
         name = banks[0].name
 
-        result = client.select(Nordigen, lambda: Nordigen.name == name)
+        result = client.select(NordigenBank, lambda: NordigenBank.name == name)
         assert result[0].requisition_id == "req"
 
         update = {"name": name, "requisition_id": "anotherreq"}
-        client.update(Nordigen, [update])
+        client.update(NordigenBank, [update])
 
-        result = client.select(Nordigen, lambda: Nordigen.name == name)
+        result = client.select(NordigenBank, lambda: NordigenBank.name == name)
         assert result[0].requisition_id == "anotherreq"
 
         result = client.select(Bank, lambda: Bank.name == name)

tests/test_load.py

@@ -31,8 +31,8 @@ class TestDatabaseLoad:
 
     def test_insert(self, loader: Loader):
         transactions = [
-            BankTransaction(date(2023, 1, 1), "", Decimal("-500"), "Bank#1"),
+            BankTransaction(date(2023, 1, 1), "", Decimal("-500"), bank="Bank#1"),
-            BankTransaction(date(2023, 1, 2), "", Decimal("500"), "Bank#2"),
+            BankTransaction(date(2023, 1, 2), "", Decimal("500"), bank="Bank#2"),
         ]
 
         loader.load(transactions)

tests/test_psd2.py

@@ -4,9 +4,10 @@ from typing import Any, Optional
 import pytest
 import requests
 
+from mocks.client import MockClient
 import mocks.nordigen as mock
 
-from pfbudget.db.model import AccountType, Bank, BankTransaction, Nordigen
+from pfbudget.db.model import AccountType, Bank, BankTransaction, NordigenBank
 from pfbudget.extract.exceptions import BankError, CredentialsError
 from pfbudget.extract.extract import Extractor
 from pfbudget.extract.nordigen import NordigenClient, NordigenCredentials
@@ -58,14 +59,13 @@ def mock_requests(monkeypatch: pytest.MonkeyPatch):
 
 @pytest.fixture
 def extractor() -> Extractor:
-    credentials = NordigenCredentials("ID", "KEY", "TOKEN")
+    credentials = NordigenCredentials("ID", "KEY")
-    return PSD2Extractor(NordigenClient(credentials))
+    return PSD2Extractor(NordigenClient(credentials, MockClient()))
 
 
 @pytest.fixture
 def bank() -> Bank:
-    bank = Bank("Bank#1", "", AccountType.checking)
+    bank = Bank("Bank#1", "", AccountType.checking, NordigenBank("", mock.id, False))
-    bank.nordigen = Nordigen("", "", mock.id, False)
     return bank
 
 
@@ -73,7 +73,7 @@ class TestExtractPSD2:
     def test_empty_credentials(self):
         cred = NordigenCredentials("", "")
         with pytest.raises(CredentialsError):
-            NordigenClient(cred)
+            NordigenClient(cred, MockClient())
 
     def test_no_psd2_bank(self, extractor: Extractor):
         with pytest.raises(BankError):
@@ -88,12 +88,17 @@ class TestExtractPSD2:
         with pytest.raises(requests.Timeout):
             extractor.extract(bank)
 
-    def test_extract(self, extractor: Extractor, bank: Bank):
+    def test_extract(
+        self, monkeypatch: pytest.MonkeyPatch, extractor: Extractor, bank: Bank
+    ):
+        monkeypatch.setattr(
+            "pfbudget.extract.nordigen.NordigenClient.dump", lambda *args: None
+        )
         assert extractor.extract(bank) == [
             BankTransaction(
-                dt.date(2023, 1, 14), "string", Decimal("328.18"), "Bank#1"
+                dt.date(2023, 1, 14), "string", Decimal("328.18"), bank="Bank#1"
             ),
             BankTransaction(
-                dt.date(2023, 2, 14), "string", Decimal("947.26"), "Bank#1"
+                dt.date(2023, 2, 14), "string", Decimal("947.26"), bank="Bank#1"
             ),
         ]

tests/test_transform.py

@@ -5,9 +5,9 @@ import mocks.categories as mock
 
 from pfbudget.db.model import (
     BankTransaction,
+    Category,
     CategoryRule,
     CategorySelector,
-    Selector_T,
     TransactionCategory,
     TransactionTag,
 )
@@ -20,8 +20,8 @@ from pfbudget.transform.transform import Transformer
 class TestTransform:
     def test_nullifier(self):
         transactions = [
-            BankTransaction(date(2023, 1, 1), "", Decimal("-500"), "Bank#1"),
+            BankTransaction(date(2023, 1, 1), "", Decimal("-500"), bank="Bank#1"),
-            BankTransaction(date(2023, 1, 2), "", Decimal("500"), "Bank#2"),
+            BankTransaction(date(2023, 1, 2), "", Decimal("500"), bank="Bank#2"),
         ]
 
         for t in transactions:
@@ -31,14 +31,12 @@ class TestTransform:
         transactions = categorizer.transform(transactions)
 
         for t in transactions:
-            assert t.category == TransactionCategory(
+            assert t.category == TransactionCategory("null", CategorySelector.nullifier)
-                "null", CategorySelector(Selector_T.nullifier)
-            )
 
     def test_nullifier_inplace(self):
         transactions = [
-            BankTransaction(date(2023, 1, 1), "", Decimal("-500"), "Bank#1"),
+            BankTransaction(date(2023, 1, 1), "", Decimal("-500"), bank="Bank#1"),
-            BankTransaction(date(2023, 1, 2), "", Decimal("500"), "Bank#2"),
+            BankTransaction(date(2023, 1, 2), "", Decimal("500"), bank="Bank#2"),
         ]
 
         for t in transactions:
@@ -48,20 +46,20 @@ class TestTransform:
         categorizer.transform_inplace(transactions)
 
         for t in transactions:
-            assert t.category == TransactionCategory(
+            assert t.category == TransactionCategory("null", CategorySelector.nullifier)
-                "null", CategorySelector(Selector_T.nullifier)
-            )
 
     def test_nullifier_with_rules(self):
         transactions = [
-            BankTransaction(date(2023, 1, 1), "", Decimal("-500"), "Bank#1"),
+            BankTransaction(date(2023, 1, 1), "", Decimal("-500"), bank="Bank#1"),
-            BankTransaction(date(2023, 1, 2), "", Decimal("500"), "Bank#2"),
+            BankTransaction(date(2023, 1, 2), "", Decimal("500"), bank="Bank#2"),
         ]
 
         for t in transactions:
             assert not t.category
 
-        rules = [CategoryRule(None, None, None, None, "Bank#1", None, None, "null")]
+        rule = CategoryRule(bank="Bank#1")
+        rule.name = "null"
+        rules = [rule]
 
         categorizer: Transformer = Nullifier(rules)
         transactions = categorizer.transform(transactions)
@@ -69,24 +67,28 @@ class TestTransform:
         for t in transactions:
             assert not t.category
 
-        rules.append(CategoryRule(None, None, None, None, "Bank#2", None, None, "null"))
+        rule = CategoryRule(bank="Bank#2")
+        rule.name = "null"
+        rules.append(rule)
         categorizer = Nullifier(rules)
         transactions = categorizer.transform(transactions)
 
         for t in transactions:
-            assert t.category == TransactionCategory(
+            assert t.category == TransactionCategory("null", CategorySelector.nullifier)
-                "null", CategorySelector(Selector_T.nullifier)
-            )
 
     def test_tagger(self):
         transactions = [
-            BankTransaction(date(2023, 1, 1), "desc#1", Decimal("-10"), "Bank#1")
+            BankTransaction(date(2023, 1, 1), "desc#1", Decimal("-10"), bank="Bank#1")
         ]
 
         for t in transactions:
             assert not t.category
 
-        categorizer: Transformer = Tagger(mock.tag_1.rules)
+        rules = mock.tag_1.rules
+        for rule in rules:
+            rule.tag = mock.tag_1.name
+
+        categorizer: Transformer = Tagger(rules)
         transactions = categorizer.transform(transactions)
 
         for t in transactions:
@@ -94,16 +96,32 @@ class TestTransform:
 
     def test_categorize(self):
         transactions = [
-            BankTransaction(date(2023, 1, 1), "desc#1", Decimal("-10"), "Bank#1")
+            BankTransaction(date(2023, 1, 1), "desc#1", Decimal("-10"), bank="Bank#1")
         ]
 
         for t in transactions:
             assert not t.category
 
-        categorizer: Transformer = Categorizer(mock.category1.rules)
+        rules = mock.category1.rules
+        for rule in rules:
+            rule.name = mock.category1.name
+
+        categorizer: Transformer = Categorizer(rules)
         transactions = categorizer.transform(transactions)
 
         for t in transactions:
-            assert t.category == TransactionCategory(
+            assert t.category == TransactionCategory("cat#1", CategorySelector.rules)
-                "cat#1", CategorySelector(Selector_T.rules)
+
-            )
+    def test_rule_limits(self):
+        transactions = [
+            BankTransaction(date.today(), "", Decimal("-60"), bank="Bank#1"),
+            BankTransaction(date.today(), "", Decimal("-120"), bank="Bank#1"),
+        ]
+
+        cat = Category("cat")
+        cat.rules = [CategoryRule(min=-120, max=-60)]
+        for r in cat.rules:
+            r.name = cat.name
+
+        transactions = Categorizer(cat.rules).transform(transactions)
+        assert all(t.category.name == cat.name for t in transactions)