Adds graph date options and report option

Also checks for transactions before loop incase of months without
transactions.

main.py

@@ -4,6 +4,7 @@ import datetime as dt
 
 from pfbudget.graph import average, discrete, monthly
 from pfbudget.transactions import load_transactions, save_transactions
+import pfbudget.report as report
 import pfbudget.tools as tools
 
 
@@ -143,10 +144,31 @@ def status(state, args):
 
 
 def graph(state, args):
+    start, end = None, None
+    if args.start or args.interval:
+        start = dt.datetime.strptime(args.start[0], "%Y/%m/%d").date()
+
+    if args.end or args.interval:
+        end = dt.datetime.strptime(args.end[0], "%Y/%m/%d").date()
+
+    if args.interval:
+        start = dt.datetime.strptime(args.interval[0], "%Y/%m/%d").date()
+        end = dt.datetime.strptime(args.interval[1], "%Y/%m/%d").date()
+
+    if args.year:
+        start = dt.datetime.strptime(args.year[0], "%Y").date()
+        end = dt.datetime.strptime(
+            str(int(args.year[0]) + 1), "%Y"
+        ).date() - dt.timedelta(days=1)
+
     if args.option == "monthly":
-        monthly(state, args.start, args.end)
+        monthly(state, start, end)
     elif args.option == "discrete":
-        discrete(state, args.start, args.end)
+        discrete(state, start, end)
+
+
+def f_report(state, args):
+    report.net(state)
 
 
 if __name__ == "__main__":
@@ -205,8 +227,13 @@ if __name__ == "__main__":
         default="monthly",
         help="graph option help",
     )
-    p_graph.add_argument("start", type=str, nargs="?", help="graph start date")
-    p_graph.add_argument("end", type=str, nargs="?", help="graph end date")
+    p_graph_interval = p_graph.add_mutually_exclusive_group()
+    p_graph_interval.add_argument(
+        "--interval", type=str, nargs=2, help="graph interval", metavar=("START", "END")
+    )
+    p_graph_interval.add_argument("--start", type=str, nargs=1, help="graph start date")
+    p_graph_interval.add_argument("--end", type=str, nargs=1, help="graph end date")
+    p_graph_interval.add_argument("--year", type=str, nargs=1, help="graph year")
 
     p_init.set_defaults(func=init)
     p_restart.set_defaults(func=restart)
@@ -215,6 +242,7 @@ if __name__ == "__main__":
     p_vacation.set_defaults(func=vacation)
     p_status.set_defaults(func=status)
     p_graph.set_defaults(func=graph)
+    p_report.set_defaults(func=f_report)
 
     state = tools.pfstate(p)
     state.filename = p

pfbudget/graph.py

@@ -148,6 +148,7 @@ def discrete(state, start, end):
         labels=["Fixed", "Required", "Health", *get_discretionary_expenses()],
     )
     plt.legend(loc="upper left")
+    plt.grid()
     plt.show()
 
 

pfbudget/report.py

@@ -0,0 +1,85 @@
+from .categories import (
+    get_income_categories,
+    get_fixed_expenses,
+    get_required_expenses,
+    get_health_expenses,
+    get_discretionary_expenses,
+)
+from .transactions import (
+    load_transactions,
+    daterange,
+    by_category,
+    by_month,
+    by_month_and_category,
+    by_year_and_category,
+)
+
+
+def net(state, start=None, end=None):
+    transactions = load_transactions(state.data_dir)
+    if not start:
+        start = transactions[0].date
+    if not end:
+        end = transactions[-1].date
+
+    income, fixed, required, health, discretionary = [], [], [], [], []
+    yearly_transactions_by_categories = by_year_and_category(transactions, start, end)
+    for _, transactions_by_category in yearly_transactions_by_categories.items():
+        income.append(
+            sum(
+                float(t.value)
+                for category, transactions in transactions_by_category.items()
+                if transactions and category in get_income_categories()
+                for t in transactions
+            )
+        )
+        fixed.append(
+            sum(
+                -float(t.value)
+                for category, transactions in transactions_by_category.items()
+                if transactions and category in get_fixed_expenses()
+                for t in transactions
+            )
+        )
+        required.append(
+            sum(
+                -float(t.value)
+                for category, transactions in transactions_by_category.items()
+                if transactions and category in get_required_expenses()
+                for t in transactions
+            )
+        )
+        health.append(
+            sum(
+                -float(t.value)
+                for category, transactions in transactions_by_category.items()
+                if transactions and category in get_health_expenses()
+                for t in transactions
+            )
+        )
+        discretionary.append(
+            sum(
+                -float(t.value)
+                for category, transactions in transactions_by_category.items()
+                if transactions and category in get_discretionary_expenses()
+                for t in transactions
+            )
+        )
+
+    for i, year in enumerate(yearly_transactions_by_categories.keys()):
+        print(year)
+        print(
+            "Income: {:.2f}, Expenses: {:.2f}, Net: {:.2f}\n"
+            "Fixed Expenses: {:.2f}\n"
+            "Required Expenses: {:.2f}\n"
+            "Health Expenses: {:.2f}\n"
+            "Discretionary Expenses: {:.2f}\n".format(
+                income[i],
+                fixed[i] + required[i] + health[i] + discretionary[i],
+                income[i] - (fixed[i] + required[i] + health[i] + discretionary[i]),
+                fixed[i],
+                required[i],
+                health[i],
+                discretionary[i],
+            )
+        )

pfbudget/transactions.py

@@ -153,6 +153,8 @@ def by_month(transactions, start=None, end=None) -> dict:
 
 def by_category(transactions) -> dict:
     transactions_by_category = dict.fromkeys(get_categories(), None)
+
+    if transactions:
         for transaction in transactions:
             try:
                 transactions_by_category[transaction.category].append(transaction)
@@ -162,6 +164,16 @@ def by_category(transactions) -> dict:
     return transactions_by_category
 
 
+def by_year_and_category(transactions, start, end) -> dict:
+    yearly_transactions_by_category = {}
+
+    yearly_transactions = by_year(transactions, start, end)
+    for year, transactions in yearly_transactions.items():
+        yearly_transactions_by_category[year] = by_category(transactions)
+
+    return yearly_transactions_by_category
+
+
 def by_month_and_category(transactions, start, end) -> dict:
     monthly_transactions_by_categories = {}