Show workouts on monthly calendar, not yet interactive (Will make it so you can change month and select workout to view on click)

app.py

@@ -11,6 +11,7 @@ import os
 import sparklines
 from dateutil.parser import isoparse
 import humanize
+from dateutil.relativedelta import relativedelta
 
 
 app = Flask(__name__)
@@ -326,6 +327,62 @@ def render_users_and_workouts():
         duration_sparkline = sparklines.sparklines(
             [int(w['duration_minutes']) for w in workouts])[0]
 
+        # Generate a monthly calendar view of the workouts
+        def get_month_bounds(dt):
+            # First day of the month
+            first_day_of_month = dt.replace(day=1)
+
+            # Last day of the month
+            next_month = first_day_of_month + relativedelta(months=1)
+            last_day_of_month = next_month - timedelta(days=1)
+
+            start = dict(
+                [(6, 0), (0, 1), (1, 2), (2, 3), (3, 4), (4, 5), (5, 6)])
+            start_date = first_day_of_month - \
+                timedelta(days=start[first_day_of_month.weekday()])
+
+            end = dict([(6, 6), (0, 5), (1, 4),
+                       (2, 3), (3, 2), (4, 1), (5, 0)])
+            end_date = last_day_of_month + \
+                timedelta(days=end[last_day_of_month.weekday()])
+
+            return start_date, end_date
+
+        def date_range(start_date, end_date):
+            current_date = start_date
+            while current_date <= end_date:
+                yield current_date
+                current_date += timedelta(days=1)
+
+        def get_workout_for_date(workouts, date):
+            for w in workouts:
+                if w['start_time_date'].date() == date:
+                    return w
+            return None
+
+        current_date = datetime.now().date()
+        start_date, end_date = get_month_bounds(current_date)
+        monthly_workouts = [w for w in workouts if start_date <=
+                            w['start_time_date'].date() <= end_date]
+
+        days_of_month = [
+            {
+                'date': single_date,
+                'day_of_month': single_date.day,
+                'is_workout': bool(workout),
+                'workout': workout if workout else None,
+                'is_current_date': single_date == current_date,
+                'is_current_month': single_date.month == current_date.month and single_date.year == current_date.year
+            }
+            for single_date in date_range(start_date, end_date)
+            for workout in [get_workout_for_date(monthly_workouts, single_date)]
+        ]
+
+        calendar_month = {
+            'month_year': current_date.strftime('%B, %Y'),
+            'days_of_month': days_of_month
+        }
+
         user_data = {
             'id': user.id,
             'name': user.name,
@@ -336,7 +393,8 @@ def render_users_and_workouts():
             'duration_by_week': duration_by_week,
             'num_days': num_days,
             'workout_counts_sparkline': workout_counts_sparkline,
-            'duration_sparkline': duration_sparkline
+            'duration_sparkline': duration_sparkline,
+            'calendar_month': calendar_month
         }
         users_data.append(user_data)