plomlompom.com Git - misc/blob - todo.py

   1 from plomlib import PlomDB, run_server, PlomHandler, PlomException
   2 import json
   3 from uuid import uuid4
   4 from datetime import datetime, timedelta
   5 from urllib.parse import parse_qs
   6 from jinja2 import Environment as JinjaEnv, FileSystemLoader as JinjaFSLoader
   7 from urllib.parse import urlparse
   8 db_path = '/home/plom/org/todo_new.json'
   9 server_port = 8082
  10 DATE_FORMAT = '%Y-%m-%d'
  11 j2env = JinjaEnv(loader=JinjaFSLoader('todo_templates'))
  12
  13 class Task:
  14
  15     def __init__(self, db, title_history=None, tags_history=None, default_effort_history=None, links_history=None):
  16         self.db = db
  17         self.title_history = title_history if title_history else {}
  18         self.tags_history = tags_history if tags_history else {}
  19         self.default_effort_history = default_effort_history if default_effort_history else {}
  20         self.links_history = links_history if links_history else {}
  21         self.visible = True
  22
  23     def _set_with_history(self, history, value):
  24         keys = sorted(history.keys())
  25         if len(history) == 0 or value != history[keys[-1]]:
  26             history[str(datetime.now())[:19]] = value
  27
  28     def _last_of_history(self, history, default):
  29         keys = sorted(history.keys())
  30         return default if 0 == len(history) else history[keys[-1]]
  31
  32     @classmethod
  33     def from_dict(cls, db, d):
  34         return cls(
  35                db,
  36                d['title_history'],
  37                {k: set(v) for k, v in d['tags_history'].items()},
  38                d['default_effort_history'],
  39                {k: set(v) for k, v in d['links_history'].items()})
  40
  41     def to_dict(self):
  42         return {
  43             'title_history': self.title_history,
  44             'default_effort_history': self.default_effort_history,
  45             'tags_history': {k: list(v) for k,v in self.tags_history.items()},
  46             'links_history': {k: list(v) for k,v in self.links_history.items()},
  47         }
  48
  49     @property
  50     def default_effort(self):
  51         return self._last_of_history(self.default_effort_history, 1)
  52
  53     @default_effort.setter
  54     def default_effort(self, default_effort):
  55         self._set_with_history(self.default_effort_history, default_effort)
  56
  57     def default_effort_at(self, queried_date):
  58         ret = self.default_effort_history[sorted(self.default_effort_history.keys())[0]]
  59         for date_key, default_effort in self.default_effort_history.items():
  60             if date_key > f'{queried_date} 23:59:59':
  61                 break
  62             ret = default_effort
  63         return ret
  64
  65     @property
  66     def current_default_effort(self):
  67         return self.default_effort_at(self.db.selected_date)
  68
  69     @property
  70     def title(self):
  71         return self._last_of_history(self.title_history, '')
  72
  73     @title.setter
  74     def title(self, title):
  75         self._set_with_history(self.title_history, title)
  76
  77     def title_at(self, queried_date):
  78         ret = self.title_history[sorted(self.title_history.keys())[0]]
  79         for date_key, title in self.title_history.items():
  80             if date_key > f'{queried_date} 23:59:59':
  81                 break
  82             ret = title
  83         return ret
  84
  85     @property
  86     def current_title(self):
  87         return self.title_at(self.db.selected_date)
  88
  89     @property
  90     def tags(self):
  91         return self._last_of_history(self.tags_history, set())
  92
  93     @tags.setter
  94     def tags(self, tags):
  95         self._set_with_history(self.tags_history, set(tags))
  96
  97     @property
  98     def links(self):
  99         return self._last_of_history(self.links_history, set())
 100
 101     @links.setter
 102     def links(self, links):
 103         self._set_with_history(self.links_history, set(links))
 104
 105     @property
 106     def id_(self):
 107         for k, v in self.db.tasks.items():
 108             if v == self:
 109                 return k
 110
 111
 112 class Day:
 113
 114     def __init__(self, db, todos=None, comment=''):
 115         self.db = db
 116         self.todos = todos if todos else {}
 117         self.comment = comment
 118         self.archived = True
 119
 120     @classmethod
 121     def from_dict(cls, db, d):
 122         todos = {}
 123         comment = d['comment'] if 'comment' in d.keys() else ''
 124         day = cls(db, todos, comment)
 125         for uuid, todo_dict in d['todos'].items():
 126             day.add_todo(uuid, todo_dict)
 127         return day
 128
 129     def to_dict(self):
 130         d = {'comment': self.comment, 'todos': {}}
 131         for task_uuid, todo in self.todos.items():
 132             d['todos'][task_uuid] = todo.to_dict()
 133         return d
 134
 135     def add_todo(self, id_, dict_source=None):
 136         self.todos[id_] = Todo.from_dict(self, dict_source) if dict_source else Todo(self)
 137         return self.todos[id_]
 138
 139     def _todos_sum(self, include_undone=False):
 140         s = 0
 141         for todo in [todo for todo in self.todos.values() if todo.done]:
 142             s += todo.effort
 143         if include_undone:
 144             for todo in [todo for todo in self.todos.values() if not todo.done]:
 145                 s += todo.day_effort if todo.day_effort else 0
 146         return s
 147
 148     @property
 149     def todos_sum(self):
 150         return self._todos_sum()
 151
 152     @property
 153     def todos_sum2(self):
 154         return self._todos_sum(True)
 155
 156     @property
 157     def date(self):
 158         for k, v in self.db.days.items():
 159             if v == self:
 160                 return k
 161
 162
 163 class Todo:
 164
 165     def __init__(self, day, done=False, day_effort=None, comment='', day_tags=None, importance=1.0):
 166         self.day = day
 167         self.done = done
 168         self.day_effort = day_effort
 169         self.comment = comment
 170         self.day_tags = day_tags if day_tags else set()
 171         self.importance = importance
 172
 173     @classmethod
 174     def from_dict(cls, day, d):
 175         return cls(day, d['done'], d['day_effort'], d['comment'], set(d['day_tags']), d['importance'])
 176
 177     def to_dict(self):
 178         return {'done': self.done, 'day_effort': self.day_effort, 'comment': self.comment, 'day_tags': list(self.day_tags), 'importance': self.importance}
 179
 180     @property
 181     def default_effort(self):
 182         return self.task.default_effort_at(self.day.date)
 183
 184     @property
 185     def effort(self):
 186         if self.day_effort:
 187             return self.day_effort
 188         else:
 189             return self.day_effort if self.day_effort else self.default_effort
 190
 191     @property
 192     def task(self):
 193         for k, v in self.day.todos.items():
 194             if v == self:
 195                 return self.day.db.tasks[k]
 196
 197     @property
 198     def title(self):
 199         return self.task.title_at(self.day.date)
 200
 201     @property
 202     def tags(self):
 203         return self.day_tags | self.task.tags
 204
 205     def internals_empty(self):
 206         return len(self.comment) == 0 and len(self.day_tags) == 0
 207
 208
 209 class TodoDB(PlomDB):
 210
 211     def __init__(self, prefix, selected_date=None, t_filter_and = None, t_filter_not = None, hide_unchosen=False, hide_done=False):
 212         self.prefix = prefix
 213         self.selected_date = selected_date if selected_date else str(datetime.now())[:10]
 214         self.t_filter_and = t_filter_and if t_filter_and else []
 215         self.t_filter_not = t_filter_not if t_filter_not else []
 216         self.hide_unchosen = hide_unchosen
 217         self.hide_done = hide_done
 218         self.days = {}
 219         self.tasks = {}
 220         self.t_tags = set()
 221         super().__init__(db_path)
 222
 223     def read_db_file(self, f):
 224         d = json.load(f)
 225         for date, day_dict in d['days'].items():
 226             self.days[date] = self.add_day(dict_source=day_dict)
 227         for day in self.days.values():
 228             for todo in day.todos.values():
 229                 for tag in todo.day_tags:
 230                     self.t_tags.add(tag)
 231         for uuid, t_dict in d['tasks'].items():
 232             t = self.add_task(id_=uuid, dict_source=t_dict)
 233             for tag in t.tags:
 234                 self.t_tags.add(tag)
 235         self.set_visibilities()
 236
 237     def set_visibilities(self):
 238         for uuid, t in self.tasks.items():
 239             t.visible = len([tag for tag in self.t_filter_and if not tag in t.tags]) == 0\
 240                     and len([tag for tag in self.t_filter_not if tag in t.tags]) == 0\
 241                     and ((not self.hide_unchosen) or uuid in self.selected_day.todos.keys())
 242         for day in self.days.values():
 243             for todo in day.todos.values():
 244                 todo.visible = len([tag for tag in self.t_filter_and if not tag in todo.day_tags | todo.task.tags ]) == 0\
 245                     and len([tag for tag in self.t_filter_not if tag in todo.day_tags | todo.task.tags ]) == 0\
 246                     and ((not self.hide_done) or (not todo.done))
 247
 248     def to_dict(self):
 249         d = {'tasks': {}, 'days': {}}
 250         for uuid, t in self.tasks.items():
 251              d['tasks'][uuid] = t.to_dict()
 252         for date, day in self.days.items():
 253             d['days'][date] = day.to_dict()
 254         return d
 255
 256     @property
 257     def selected_day(self):
 258         if not self.selected_date in self.days.keys():
 259             self.days[self.selected_date] = self.add_day()
 260         return self.days[self.selected_date]
 261
 262     def write(self):
 263         dates_to_purge = []
 264         for date, day in self.days.items():
 265             if len(day.todos) == 0 and len(day.comment) == 0:
 266                 dates_to_purge += [date]
 267         for date in dates_to_purge:
 268             del self.days[date]
 269         self.write_text_to_db(json.dumps(self.to_dict()))
 270
 271     def add_task(self, id_=None, dict_source=None, return_id=False):
 272         t = Task.from_dict(self, dict_source) if dict_source else Task(self)
 273         id_ = id_ if id_ else str(uuid4())
 274         self.tasks[id_] = t
 275         if return_id:
 276             return id_, t
 277         else:
 278             return t
 279
 280     def add_day(self, dict_source=None):
 281         return Day.from_dict(self, dict_source) if dict_source else Day(self)
 282
 283     def show_day(self, task_sort=None):
 284         task_sort = task_sort if task_sort else 'title'
 285         current_date = datetime.strptime(self.selected_date, DATE_FORMAT)
 286         prev_date = current_date - timedelta(days=1)
 287         prev_date_str = prev_date.strftime(DATE_FORMAT)
 288         next_date = current_date + timedelta(days=1)
 289         next_date_str = next_date.strftime(DATE_FORMAT)
 290         task_rows = []
 291         for uuid, task in self.tasks.items():
 292             if not task.visible:
 293                 continue
 294             todo = None
 295             if uuid in self.selected_day.todos.keys():
 296                 todo = self.selected_day.todos[uuid]
 297                 if not todo.visible:
 298                     continue
 299             task_rows += [{'uuid': uuid, 'task': task, 'todo': todo}]
 300         if task_sort == 'title':
 301             task_rows.sort(key=lambda r: r['task'].title)
 302         elif task_sort == 'default_effort':
 303             task_rows.sort(key=lambda r: r['task'].default_effort, reverse=True)
 304         elif task_sort == 'done':
 305             task_rows.sort(key=lambda r: 0 if not r['todo'] else r['todo'].day_effort if r['todo'].day_effort else r['task'].default_effort if r['todo'].done else 0, reverse=True)
 306         elif task_sort == 'importance':
 307             task_rows.sort(key=lambda r: 0.0 if not r['todo'] else r['todo'].importance, reverse=True)
 308         elif task_sort == 'chosen':
 309             task_rows.sort(key=lambda r: False if not r['todo'] else True, reverse=True)
 310         elif task_sort == 'comment':
 311             task_rows.sort(key=lambda r: '' if not r['todo'] else r['todo'].comment, reverse=True)
 312         done_tasks = []
 313         for uuid, task in self.tasks.items():
 314             if uuid in self.selected_day.todos.keys():
 315                 todo = self.selected_day.todos[uuid]
 316                 if todo.done:
 317                     done_tasks += [todo]
 318         done_tasks.sort(key=lambda t: t.effort, reverse=True)
 319         return j2env.get_template('day.html').render(db=self, action=self.prefix+'/day', prev_date=prev_date_str, next_date=next_date_str, task_rows=task_rows, sort=task_sort, done_tasks=done_tasks)
 320
 321     def show_calendar(self, start_date_str, end_date_str):
 322         self.t_filter_and = ['calendar']
 323         self.t_filter_not = ['deleted']
 324         self.set_visibilities()
 325         days_to_show = {}
 326         todays_date_str = str(datetime.now())[:10]
 327         todays_date_obj = datetime.strptime(todays_date_str, DATE_FORMAT)
 328         yesterdays_date_obj = todays_date_obj - timedelta(1)
 329         yesterdays_date_str = yesterdays_date_obj.strftime(DATE_FORMAT)
 330         start_date_obj = datetime.strptime(sorted(self.days.keys())[0], DATE_FORMAT)
 331         if start_date_str and len(start_date_str) > 0:
 332             if start_date_str in {'today', 'yesterday'}:
 333                 start_date_obj = todays_date_obj if start_date_str == 'today' else yesterdays_date_obj
 334             else:
 335                 start_date_obj = datetime.strptime(start_date_str, DATE_FORMAT)
 336         end_date_obj = datetime.strptime(sorted(self.days.keys())[-1], DATE_FORMAT)
 337         if end_date_str and len(end_date_str) > 0:
 338             if end_date_str in {'today', 'yesterday'}:
 339                 end_date_obj = todays_date_obj if end_date_str == 'today' else yesterdays_date_obj
 340             else:
 341                 end_date_obj = datetime.strptime(start_date_str, DATE_FORMAT)
 342         for n in range(int((end_date_obj - start_date_obj).days) + 1):
 343             current_date_obj = start_date_obj + timedelta(n)
 344             current_date_str = current_date_obj.strftime(DATE_FORMAT)
 345             if current_date_str not in self.days.keys():
 346                 days_to_show[current_date_str] = self.add_day()
 347             else:
 348                 days_to_show[current_date_str] = self.days[current_date_str]
 349             days_to_show[current_date_str].weekday = datetime.strptime(current_date_str, DATE_FORMAT).strftime('%A')[:2]
 350         return j2env.get_template('calendar.html').render(db=self, days=days_to_show, action=self.prefix+'/calendar', start_date=start_date_str, end_date=end_date_str)
 351
 352     def show_todo(self, task_uuid, selected_date, referer):
 353         if selected_date not in self.days.keys():
 354            self.days[selected_date] = self.add_day()
 355         if task_uuid in self.days[selected_date].todos:
 356             todo = self.days[selected_date].todos[task_uuid]
 357         else:
 358             todo = self.days[selected_date].add_todo(task_uuid)
 359         return j2env.get_template('todo.html').render(db=self, todo=todo, action=self.prefix+'/todo', referer=referer)
 360
 361     def update_todo_mini(self, task_uuid, date, day_effort, done, importance):
 362         if date not in self.days.keys():
 363            self.days[date] = self.add_day()
 364         if task_uuid in self.days[date].todos.keys():
 365             todo = self.days[date].todos[task_uuid]
 366         else:
 367             todo = self.days[date].add_todo(task_uuid)
 368         todo.day_effort = day_effort
 369         todo.done = done
 370         todo.importance = importance
 371         return todo
 372
 373     def collect_tags(self, tags_joined, tags_checked):
 374         tags = set()
 375         for tag in [tag.strip() for tag in tags_joined.split(';') if tag.strip() != '']:
 376             tags.add(tag)
 377         for tag in tags_checked:
 378             tags.add(tag)
 379         return tags
 380
 381     def update_todo(self, task_uuid, date, day_effort, done, comment, day_tags_joined, day_tags_checked, importance):
 382         day_effort = float(day_effort) if len(day_effort) > 0 else None
 383         importance = float(importance)
 384         todo = self.update_todo_mini(task_uuid, date, day_effort, done, importance)
 385         todo.comment = comment
 386         todo.day_tags = self.collect_tags(day_tags_joined, day_tags_checked)
 387
 388     def show_task(self, id_, referer=''):
 389         task = self.tasks[id_] if id_ else self.add_task()
 390         return j2env.get_template('task.html').render(db=self, task=task, action=self.prefix+'/task', referer=referer)
 391
 392     def update_task(self, id_, title, default_effort, tags_joined, tags_checked, links):
 393         task = self.tasks[id_] if id_ in self.tasks.keys() else self.add_task(id_)
 394         task.title = title
 395         task.default_effort = float(default_effort) if len(default_effort) > 0 else None
 396         task.tags = self.collect_tags(tags_joined, tags_checked)
 397         task.links = links
 398         for link in links:
 399             borrowed_links = self.tasks[link].links
 400             borrowed_links.add(id_)
 401             self.tasks[link].links = borrowed_links
 402
 403     def show_tasks(self):
 404         return j2env.get_template('tasks.html').render(db=self, action=self.prefix+'/tasks')
 405
 406
 407
 408 class TodoHandler(PlomHandler):
 409
 410     def config_init(self):
 411         return {
 412             'cookie_name': 'todo_cookie',
 413             'prefix': '',
 414             'cookie_path': '/'
 415         }
 416
 417     def app_init(self, handler):
 418         default_path = '/todo'
 419         handler.add_route('GET', default_path, self.show_db)
 420         handler.add_route('POST', default_path, self.write_db)
 421         return 'todo', {'cookie_name': 'todo_cookie', 'prefix': default_path, 'cookie_path': default_path}
 422
 423     def do_POST(self):
 424         self.try_do(self.config_init)
 425         self.try_do(self.write_db)
 426
 427     def write_db(self):
 428         from urllib.parse import urlencode
 429         app_config = self.apps['todo'] if hasattr(self, 'apps') else self.config()
 430         length = int(self.headers['content-length'])
 431         postvars = parse_qs(self.rfile.read(length).decode(), keep_blank_values=1)
 432         parsed_url = urlparse(self.path)
 433         db = TodoDB(prefix=app_config['prefix'])
 434         params_to_encode = []
 435         for param_name, filter_db_name in {('t_and', 't_filter_and'), ('t_not', 't_filter_not')}:
 436             filter_db = getattr(db, filter_db_name)
 437             if param_name in postvars.keys():
 438                 for target in postvars[param_name]:
 439                     if len(target) > 0 and not target in filter_db:
 440                         filter_db += [target]
 441                 if len(filter_db) == 0:
 442                     params_to_encode += [(param_name, '-')]
 443             params_to_encode += [(param_name, f) for f in filter_db]
 444
 445         def collect_checked(prefix, postvars):
 446             tags_checked = []
 447             for k in postvars.keys():
 448                 if k.startswith(prefix):
 449                     tags_checked += [k[len(prefix):]]
 450             return tags_checked
 451
 452         if parsed_url.path == app_config['prefix'] + '/calendar':
 453             params_to_encode += [('start', postvars['start'][0] if len(postvars['start'][0]) > 0 else '-')]
 454             params_to_encode += [('end', postvars['end'][0] if len(postvars['end'][0]) > 0 else '-')]
 455
 456         elif parsed_url.path == app_config['prefix'] + '/todo':
 457             task_uuid = postvars['task_uuid'][0]
 458             date = postvars['date'][0]
 459             params_to_encode += [('task', task_uuid), ('date', date)]
 460             db.update_todo(task_uuid, date, postvars['day_effort'][0], 'done' in postvars.keys(), postvars['comment'][0], postvars['joined_day_tags'][0], collect_checked('day_tag_', postvars), postvars['importance'][0])
 461
 462         elif parsed_url.path == app_config['prefix'] + '/task':
 463             id_ = postvars['id'][0]
 464             params_to_encode += [('id', id_)]
 465             if 'title' in postvars.keys():
 466                 db.update_task(id_, postvars['title'][0], postvars['default_effort'][0], postvars['joined_tags'][0], collect_checked('tag_', postvars), collect_checked('link_', postvars))
 467
 468         elif parsed_url.path == app_config['prefix'] + '/day':
 469             # always store the two hide params in the URL if possible … TODO: find out if really necessary
 470             if 'expect_unchosen_done' in postvars.keys():
 471                 params_to_encode += [('hide_unchosen', int('hide_unchosen' in postvars.keys()))] + [('hide_done', int('hide_done' in postvars.keys()))]
 472
 473             if 'selected_date' in postvars.keys():
 474                 db.selected_date = postvars['selected_date'][0]
 475                 if 'day_comment' in postvars.keys():
 476                     db.selected_day.comment = postvars['day_comment'][0]
 477                 params_to_encode += [('selected_date', db.selected_date)]
 478
 479                 # handle todo list updates via task UUIDs
 480                 if 't_uuid' in postvars.keys():
 481                     for i, uuid in enumerate(postvars['t_uuid']):
 482                         task = db.tasks[uuid]
 483                         old_todo = None if not uuid in db.selected_day.todos.keys() else db.selected_day.todos[uuid]
 484                         selects_as_todo = 'choose' in postvars and uuid in postvars['choose']
 485                         too_much_keepworthy_data = ('done' in postvars and uuid in postvars['done']) or postvars['day_effort'][i] != '' or (old_todo and not old_todo.internals_empty())
 486                         if old_todo and too_much_keepworthy_data and not selects_as_todo:
 487                             raise PlomException('cannot deselect task as todo of preserve-worthy values')
 488                         elif old_todo and not selects_as_todo:
 489                             del db.selected_day.todos[uuid]
 490                         else:
 491                             done = ('done' in postvars) and (uuid in postvars['done'])
 492                             day_effort_input = postvars['day_effort'][i]
 493                             day_effort = float(day_effort_input) if len(day_effort_input) > 0 else None
 494                             importance = float(postvars['importance'][i])
 495                             if old_todo and old_todo.done == done and old_todo.day_effort == day_effort and old_todo.importance == importance:
 496                                 continue
 497                             db.update_todo_mini(uuid, db.selected_date, day_effort, done, importance)
 498
 499         if 'referer' in postvars.keys() and len(postvars['referer'][0]) > 0:
 500             homepage = postvars['referer'][0]
 501         else:
 502             encoded_params = urlencode(params_to_encode)
 503             homepage = f'{parsed_url.path}?{encoded_params}'
 504         db.write()
 505         self.redirect(homepage)
 506
 507     def do_GET(self):
 508         self.try_do(self.config_init)
 509         self.try_do(self.show_db)
 510
 511     def show_db(self):
 512         app_config = self.apps['todo'] if hasattr(self, 'apps') else self.config()
 513         cookie_db = self.get_cookie_db(app_config['cookie_name'])
 514         parsed_url = urlparse(self.path)
 515         params = parse_qs(parsed_url.query)
 516
 517         def get_param(param_name, boolean=False, chained=False):
 518             if chained:
 519                 param = params.get(param_name, None)
 520             else:
 521                 param = params.get(param_name, [None])[0]
 522             if (not chained and param == '-') or (chained and param == ['-']):
 523                 param = None
 524                 if param_name in cookie_db.keys():
 525                     del cookie_db[param_name]
 526             if param is None and param_name in cookie_db.keys():
 527                 param = cookie_db[param_name]
 528             if param is not None:
 529                 if boolean:
 530                     param = param != '0'
 531                     cookie_db[param_name] = str(int(param))
 532                 else:
 533                     cookie_db[param_name] = param
 534             elif param is boolean:
 535                 param = False
 536             return param
 537
 538         selected_date = t_filter_and = t_filter_not = None
 539         hide_unchosen = hide_done = False
 540         referer = params.get('referer', [''])[0]
 541         if parsed_url.path in {app_config['prefix'] + '/day', app_config['prefix'] + '/tasks'}:
 542             selected_date = get_param('selected_date')
 543         if parsed_url.path in {app_config['prefix'] + '/day', app_config['prefix'] + '/tasks', app_config['prefix'] + '/task'}:
 544             t_filter_and = get_param('t_and', chained=True)
 545             t_filter_not = get_param('t_not', chained=True)
 546         if parsed_url.path == app_config['prefix'] + '/day':
 547             hide_unchosen = get_param('hide_unchosen', boolean=True)
 548             hide_done = get_param('hide_done', boolean=True)
 549         db = TodoDB(app_config['prefix'], selected_date, t_filter_and, t_filter_not, hide_unchosen, hide_done)
 550         if parsed_url.path == app_config['prefix'] + '/day':
 551             task_sort = get_param('sort')
 552             page = db.show_day(task_sort)
 553         elif parsed_url.path == app_config['prefix'] + '/todo':
 554             todo_date = params.get('date', [None])[0]
 555             task_uuid = params.get('task', [None])[0]
 556             page = db.show_todo(task_uuid, todo_date, referer)
 557         elif parsed_url.path == app_config['prefix'] + '/task':
 558             id_ = params.get('id', [None])[0]
 559             page = db.show_task(id_, referer)
 560         elif parsed_url.path == app_config['prefix'] + '/tasks':
 561             page = db.show_tasks()
 562         elif parsed_url.path == app_config['prefix'] + '/add_task':
 563             page = db.show_task(None)
 564         elif parsed_url.path == app_config['prefix'] + '/unset_cookie':
 565             page = 'no cookie to unset.'
 566             if len(cookie_db) > 0:
 567                 self.unset_cookie(app_config['cookie_name'], app_config['cookie_path'])
 568                 page = 'cookie unset!'
 569         else:
 570             start_date = get_param('start')
 571             end_date = get_param('end')
 572             page = db.show_calendar(start_date, end_date)
 573         if parsed_url.path != app_config['prefix'] + '/unset_cookie':
 574             self.set_cookie(app_config['cookie_name'], app_config['cookie_path'], cookie_db)
 575         self.send_HTML(page)
 576
 577
 578 if __name__ == "__main__":
 579     run_server(server_port, TodoHandler)