refactor: move month_year_picker to common and make it more generic

app/apps/monthly_overview/views/ui.py

@@ -1,71 +0,0 @@
-from dateutil.relativedelta import relativedelta
-from django.db.models import (
-    Count,
-)
-from django.db.models.functions import ExtractYear, ExtractMonth
-from django.shortcuts import render
-from django.utils import timezone
-
-from apps.transactions.models import Transaction
-
-
-def month_year_picker(request):
-    # Get current month and year from request or use current date
-    current_date = timezone.localdate(timezone.now())
-    current_month = int(request.GET.get("month", current_date.month))
-    current_year = int(request.GET.get("year", current_date.year))
-
-    # Set start and end dates
-    start_date = timezone.datetime(current_year - 1, 1, 1).date()
-    end_date = timezone.datetime(current_year + 1, 12, 31).date()
-
-    # Get years from transactions
-    transaction_years = Transaction.objects.dates("reference_date", "year", order="ASC")
-
-    # Extend start_date and end_date if necessary
-    if transaction_years:
-        start_date = min(start_date, transaction_years.first().replace(month=1, day=1))
-        end_date = max(end_date, transaction_years.last().replace(month=12, day=31))
-
-    # Generate all months between start_date and end_date
-    all_months = []
-    current_month_date = start_date
-    while current_month_date <= end_date:
-        all_months.append(current_month_date)
-        current_month_date += relativedelta(months=1)
-
-    # Get transaction counts for each month
-    transaction_counts = (
-        Transaction.objects.annotate(
-            year=ExtractYear("reference_date"), month=ExtractMonth("reference_date")
-        )
-        .values("year", "month")
-        .annotate(transaction_count=Count("id"))
-        .order_by("year", "month")
-    )
-
-    # Create a dictionary for quick lookup
-    count_dict = {
-        (item["year"], item["month"]): item["transaction_count"]
-        for item in transaction_counts
-    }
-
-    # Create the final result
-    result = [
-        {
-            "year": date.year,
-            "month": date.month,
-            "transaction_count": count_dict.get((date.year, date.month), 0),
-        }
-        for date in all_months
-    ]
-
-    return render(
-        request,
-        "monthly_overview/fragments/month_year_picker.html",
-        {
-            "month_year_data": result,
-            "current_month": current_month,
-            "current_year": current_year,
-        },
-    )