Adding a last run tracking file to be able to created skipped days tasks

.gitignore

@@ -1,4 +1,5 @@
 .idea/
+.last.run
 configuration.yml
 tasks.yml
 test/

main.py

@@ -1,12 +1,11 @@
 import datetime
+import os
 
-from caldav.lib.error import NotFoundError
-from caldav.objects import Todo
 from yaml import load, FullLoader
-import icalendar
 from icalendar.parser import Contentlines, Contentline
 from dateutil.rrule import rrule, FREQNAMES
 import caldav
+from caldav.lib.error import NotFoundError
 
 
 APP_ID = 'CaldavRecurringTask'
@@ -66,6 +65,9 @@ class Client:
         if self.calendar is None:
             raise LookupError('No calendar named "{}" found'.format(calendar_name))
 
+    def todos(self, include_completed=True):
+        return self.calendar.todos(include_completed=include_completed)
+
     def add_todo(self, new_task):
         self.calendar.add_todo(new_task.to_ical())
 
@@ -82,28 +84,42 @@ if __name__ == "__main__":
     with open('./configuration.yml', 'r') as configuration_file:
         conf = load(configuration_file.read(), Loader=FullLoader)
 
-    ref_date = datetime.date.today() + datetime.timedelta(days=2)
-    with open('tasks.yml', 'r') as content_file:
-        tasks_conf = load(content_file.read(), Loader=FullLoader)
+    last_run_file_path = './.last.run'
+    if os.path.isfile(last_run_file_path):
+        with open(last_run_file_path, 'r') as last_run_file:
+            run_date_str = last_run_file.readline()
+            run_date = datetime.datetime.strptime(run_date_str, '%Y-%m-%d') + datetime.timedelta(days=1)
+            run_date = run_date.date()
+    else:
+        run_date = datetime.date.today()
 
-    task_list = []
-    for task_name, task_data in tasks_conf.items():
-        t = Task(ref_date, task_name, task_data)
-        if t.date_begin.date() == ref_date:
-            task_list.append(t)
+    while run_date <= datetime.date.today():
+        ref_date = run_date + datetime.timedelta(days=2)
+        with open('tasks.yml', 'r') as content_file:
+            tasks_conf = load(content_file.read(), Loader=FullLoader)
 
-    if task_list:
-        server = conf['dav_server']
-        client = Client(server['url'], server['user'], server['pass'], server['calendar'])
-        previous_tasks = client.todos(include_completed=True)
-        for task in task_list:
-            if not client.get_todo_by_uid(task.uid):
-                # Removing previous completed tasks
-                for t in previous_tasks:
-                    if t.icalendar_component.get('uid').startswith(f"{APP_ID}-{task.name}")\
-                            and t.icalendar_component.get('status') == 'COMPLETED':
-                        t.delete()
+        task_list = []
+        for task_name, task_data in tasks_conf.items():
+            t = Task(ref_date, task_name, task_data)
+            if t.date_begin.date() == ref_date:
+                task_list.append(t)
 
-                client.add_todo(task)
+        if task_list:
+            server = conf['dav_server']
+            client = Client(server['url'], server['user'], server['pass'], server['calendar'])
+            previous_tasks = client.todos(include_completed=True)
+            for task in task_list:
+                if not client.get_todo_by_uid(task.uid):
+                    # Removing previous completed tasks
+                    for t in previous_tasks:
+                        if t.icalendar_component.get('uid').startswith(f"{APP_ID}-{task.name}")\
+                                and t.icalendar_component.get('status') == 'COMPLETED':
+                            t.delete()
 
-    print('process finished: {} tasks created'.format(len(task_list)))
+                    client.add_todo(task)
+
+        print('process finished for date {}: {} tasks created\n'.format(run_date, len(task_list)))
+        run_date = run_date + datetime.timedelta(days=1)
+
+    with open(last_run_file_path, 'w') as last_run_file:
+        last_run_file.write(str(datetime.date.today()))