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 from os.path import split as path_split
   9 db_path = '/home/plom/org/todo_new.json'
  10 server_port = 8082
  11 DATE_FORMAT = '%Y-%m-%d'
  12 j2env = JinjaEnv(loader=JinjaFSLoader('todo_templates'))
  13
  14
  15
  16 def today_date(with_time=False):
  17     length = 19 if with_time else 10
  18     return str(datetime.now())[:length]
  19
  20
  21
  22 class AttributeWithHistory:
  23
  24     def __init__(self, default_if_empty, history=None, then_date='2000-01-01', set_check=None, alt_get=None):
  25         self.default = default_if_empty
  26         self.then_date = then_date
  27         self.history = history if history else {}
  28         self.set_check = set_check
  29         self.alt_get = alt_get
  30
  31     def set(self, value):
  32         if self.set_check:
  33             self.set_check(value)
  34         keys = sorted(self.history.keys())
  35         if len(self.history) == 0 or value != self.history[keys[-1]]:
  36             self.history[today_date(with_time=True)] = value
  37
  38     def at(self, queried_date):
  39         if self.alt_get:
  40             ret = self.alt_get('at', queried_date)
  41             if ret is not None:
  42                 return ret
  43         if 0 == len(self.history):
  44             return self.default
  45         ret = self.history[sorted(self.history.keys())[0]]
  46         for date_key, item in self.history.items():
  47             if date_key > f'{queried_date} 23:59:59':
  48                 break
  49             ret = item
  50         return ret
  51
  52     @property
  53     def now(self):
  54         if self.alt_get:
  55             ret = self.alt_get('now')
  56             if ret is not None:
  57                 return ret
  58         keys = sorted(self.history.keys())
  59         return self.default if 0 == len(self.history) else self.history[keys[-1]]
  60
  61     @property
  62     def then(self):
  63         if self.alt_get:
  64             ret = self.alt_get('then')
  65             if ret is not None:
  66                 return ret
  67         return self.at(self.then_date)
  68
  69
  70
  71 class Task:
  72
  73     def __init__(self,
  74             db,
  75             id_,
  76             title_history=None,
  77             tags_history=None,
  78             default_effort_history=None,
  79             subtask_ids_history=None,
  80             comment=''):
  81         self.db = db
  82         self.id_ = id_
  83         self.title = AttributeWithHistory('', title_history, self.db.selected_date)
  84         self.tags = AttributeWithHistory(set(), tags_history, self.db.selected_date)
  85         self.default_effort = AttributeWithHistory(0.0, default_effort_history, self.db.selected_date, alt_get=self.subtasks_sum_maker())
  86         self.subtask_ids = AttributeWithHistory(set(), subtask_ids_history, self.db.selected_date, set_check=self.subtask_loop_checker())
  87         self.comment = comment
  88
  89         self.visible = True
  90         self.dependers = []
  91
  92     @classmethod
  93     def from_dict(cls, db, d, id_):
  94         t = cls(
  95                db,
  96                id_,
  97                d['title_history'],
  98                {k: set(v) for k, v in d['tags_history'].items()},
  99                d['default_effort_history'],
 100                {k: set(v) for k, v in d['subtasks_history'].items()},
 101                d['comment'])
 102         return t
 103
 104     def to_dict(self):
 105         return {
 106             'title_history': self.title.history,
 107             'default_effort_history': self.default_effort.history,
 108             'tags_history': {k: list(v) for k, v in self.tags.history.items()},
 109             'subtasks_history': {k: list(v) for k, v in self.subtask_ids.history.items()},
 110             'comment': self.comment,
 111         }
 112
 113     @property
 114     def subtasks(self):
 115         subtasks = []
 116         for id_ in self.subtask_ids.now:
 117             if len(id_) == 0:
 118                 continue
 119             subtasks += [self.db.tasks[id_]]
 120         return subtasks
 121
 122     @property
 123     def subtask_depth(self):
 124         def count_depth(task):
 125             sub_count = 1
 126             for subtask in task.subtasks:
 127                 sub_count += count_depth(subtask)
 128             return sub_count
 129         return count_depth(self)
 130
 131     def subtask_loop_checker(self):
 132         def f(subtask_ids_now):
 133             loop_msg = "can't set subtask, would create loop"
 134             for id_ in subtask_ids_now:
 135                 if id_ == self.id_:
 136                     raise PlomException(loop_msg)
 137                 elif id_ in self.db.tasks.keys():
 138                     subtask = self.db.tasks[id_]
 139                     f(subtask.subtask_ids.now)
 140         return f
 141
 142     def subtasks_sum_maker(self):
 143         def f(f_name, queried_date=None):
 144             subtask_ids_to_check = getattr(self.subtask_ids, f_name)
 145             if queried_date:
 146                 subtasks = [self.db.tasks[id_] for id_ in subtask_ids_to_check(queried_date)]
 147             else:
 148                 subtasks = [self.db.tasks[id_] for id_ in subtask_ids_to_check]
 149             if len(self.subtasks) > 0:
 150                 summe = 0
 151                 for subtask in self.subtasks:
 152                     if queried_date:
 153                         to_add = getattr(subtask.default_effort, f_name)
 154                         summe += to_add(queried_date)
 155                     else:
 156                         summe += getattr(subtask.default_effort, f_name)
 157                 return summe
 158             return None
 159         return f
 160
 161     def matches(self, search):
 162         if search is None:
 163             return False
 164         else:
 165             return search in self.title.now or search in self.comment or search in '$'.join(self.tags.now)
 166
 167
 168 class Day:
 169
 170     def __init__(self, db, date, comment=''):
 171         self.date = date
 172         self.db = db
 173         self.comment = comment
 174         self.linked_todos_as_list = []
 175
 176     @classmethod
 177     def from_dict(cls, db, d, date=None):
 178         comment = d['comment'] if 'comment' in d.keys() else ''
 179         day = cls(db, date, comment)
 180         return day
 181
 182     def to_dict(self):
 183         d = {'comment': self.comment}
 184         return d
 185
 186     @property
 187     def linked_todos(self):
 188         linked_todos = {}
 189         for todo in self.linked_todos_as_list:
 190             linked_todos[todo.id_] = todo
 191         return linked_todos
 192
 193     def _todos_sum(self, include_undone=False):
 194         s = 0
 195         for todo in [todo for todo in self.linked_todos.values()
 196                      if self.date in todo.efforts.keys()]:
 197                      # and not todo.children]:
 198             day_effort = todo.efforts[self.date]
 199             if todo.done:
 200                 s += day_effort if day_effort else todo.task.default_effort.at(self.date)
 201             elif include_undone:
 202                 s += day_effort if day_effort else 0
 203         return s
 204
 205     @property
 206     def todos_sum(self):
 207         return self._todos_sum()
 208
 209
 210 class Todo:
 211
 212     def __init__(self,
 213                  db,
 214                  id_,
 215                  task,
 216                  done=False,
 217                  comment='',
 218                  day_tags=None,
 219                  importance=1.0,
 220                  efforts=None,
 221                  dep_ids=None):
 222         self.id_ = id_
 223         self.db = db
 224         self.task = task
 225         self._done = done
 226         self.efforts = efforts if efforts else {}
 227         self.comment = comment
 228         self.day_tags = day_tags if day_tags else set()
 229         self.importance = importance
 230         self.dep_ids = dep_ids if dep_ids else []
 231
 232         self.dependers = []
 233
 234     @classmethod
 235     def from_dict(cls, db, d, id_):
 236         todo = cls(
 237                 db,
 238                 id_,
 239                 db.tasks[d['task']],
 240                 d['done'],
 241                 d['comment'],
 242                 set(d['day_tags']),
 243                 d['importance'],
 244                 d['efforts'],
 245                 d['deps'])
 246         return todo
 247
 248     def to_dict(self):
 249         return {
 250                 'task': self.task.id_,
 251                 'done': self.done,
 252                 'comment': self.comment,
 253                 'day_tags': list(self.day_tags),
 254                 'importance': self.importance,
 255                 'efforts': self.efforts,
 256                 'deps': self.dep_ids}
 257
 258     @property
 259     def title(self):
 260         return self.task.title.at(self.earliest_date)
 261
 262     @property
 263     def dated_title(self):
 264         return f'{self.earliest_date}:{self.title}'
 265
 266     @property
 267     def deps(self):
 268         return [self.db.todos[id_] for id_ in self.dep_ids]
 269
 270     @deps.setter
 271     def deps(self, deps):
 272         self.dep_ids = [dep.id_ for dep in deps]
 273
 274     @property
 275     def default_effort(self):
 276         return self.task.default_effort.at(self.earliest_date)
 277
 278     @property
 279     def done(self):
 280         return self.deps_done and self._done
 281
 282     @done.setter
 283     def done(self, doneness):
 284         self._done = doneness
 285
 286     @property
 287     def deps_done(self):
 288         if len(self.deps) > 0:
 289             for dep in self.deps:
 290                 if not dep.done:
 291                     return False
 292         return True
 293
 294     @property
 295     def dep_efforts(self):
 296         dep_efforts = 0
 297         if self.deps:
 298             for dep in self.deps:
 299                 dep_efforts += dep.all_days_effort
 300                 dep_efforts += dep.dep_efforts
 301         return dep_efforts
 302
 303     def depender_path(self, dep):
 304         if self.dependers:
 305             return f'Y{depender.depender_path()}:{self.title}Y'
 306         else:
 307             return f'X{self.title}X'
 308
 309     @property
 310     def depender_paths(self):
 311         paths = []
 312         for depender in self.dependers:
 313             if len(depender.depender_paths) == 0:
 314                  paths += [[depender]]
 315             else:
 316                 for path in depender.depender_paths:
 317                     paths += [path + [depender]]
 318         return paths
 319
 320     @property
 321     def all_days_effort(self):
 322         total = 0
 323         for effort in self.efforts.values():
 324             total += effort if effort else 0
 325         if self.done:
 326             total = max(total, self.task.default_effort.at(self.latest_date))
 327         return total
 328
 329     def matches(self, search):
 330         if search is None:
 331             return False
 332         else:
 333             return search in self.comment or search in '$'.join(self.tags) or search in self.title
 334
 335     def is_effort_removable(self, date):
 336         if not date in self.efforts.keys():
 337             return False
 338         if self.efforts[date]:
 339             return False
 340         if self.done and date == self.latest_date:
 341             return False
 342         return True
 343
 344     @property
 345     def tags(self):
 346         return self.day_tags | self.task.tags.now
 347
 348     @property
 349     def day_effort(self):
 350         return self.efforts[self.db.selected_date]
 351
 352     @property
 353     def day(self):
 354         return self.db.days[self.earliest_date]
 355
 356     @property
 357     def sorted_effort_dates(self):
 358         dates = list(self.efforts.keys())
 359         dates.sort()
 360         return dates
 361
 362     @property
 363     def earliest_date(self):
 364         return self.sorted_effort_dates[0]
 365
 366     @property
 367     def latest_date(self):
 368         return self.sorted_effort_dates[-1]
 369
 370
 371 class TodoDB(PlomDB):
 372
 373     def __init__(self,
 374             selected_date=None,
 375             tag_filter_and = None,
 376             tag_filter_not = None,
 377             hide_unchosen=False,
 378             hide_done=False):
 379         self.selected_date = selected_date if selected_date else today_date()
 380         self.tag_filter_and = tag_filter_and if tag_filter_and else []
 381         self.tag_filter_not = tag_filter_not if tag_filter_not else []
 382         self.hide_unchosen = hide_unchosen
 383         self.hide_done = hide_done
 384
 385         self.days = {}
 386         self.tasks = {}
 387         self.t_tags = set()
 388         self.todos = {}
 389         super().__init__(db_path)
 390
 391     # savefile I/O
 392
 393     def read_db_file(self, f):
 394         d = json.load(f)
 395
 396         for id_, t_dict in d['tasks'].items():
 397             t = self.add_task(id_=id_, dict_source=t_dict)
 398             for tag in t.tags.now:
 399                 self.t_tags.add(tag)
 400         for task in self.tasks.values():
 401             for dep in task.subtasks:
 402                 dep.dependers += [task]
 403
 404         for id_, todo_dict in d['todos'].items():
 405             todo = self.add_todo(todo_dict, id_, link_into_day=False)
 406             for tag in todo.day_tags:
 407                 self.t_tags.add(tag)
 408         for todo in self.todos.values():
 409             for dep in todo.deps:
 410                 dep.dependers += [todo]
 411
 412         for date, day_dict in d['days'].items():
 413             self.add_day(dict_source=day_dict, date=date)
 414         for todo in self.todos.values():
 415             for date in todo.efforts.keys():
 416                 if not date in self.days.keys():
 417                     self.add_day(date)
 418                 self.days[date].linked_todos_as_list += [todo]
 419
 420         self.set_visibilities()
 421
 422     def to_dict(self):
 423         d = {'tasks': {}, 'days': {}, 'todos': {}}
 424         for uuid, t in self.tasks.items():
 425              d['tasks'][uuid] = t.to_dict()
 426         for date, day in self.days.items():
 427             d['days'][date] = day.to_dict()
 428         for id_, todo in self.todos.items():
 429             d['todos'][id_] = todo.to_dict()
 430         return d
 431
 432     def write(self):
 433         dates_to_purge = []
 434         for date, day in self.days.items():
 435             if len(day.linked_todos) == 0 and len(day.comment) == 0:
 436                 dates_to_purge += [date]
 437         for date in dates_to_purge:
 438             del self.days[date]
 439         self.write_text_to_db(json.dumps(self.to_dict()))
 440
 441     # properties
 442
 443     @property
 444     def selected_day(self):
 445         if not self.selected_date in self.days.keys():
 446             self.days[self.selected_date] = self.add_day(date=self.selected_date)
 447         return self.days[self.selected_date]
 448
 449     # table manipulations
 450
 451     def add_day(self, date, dict_source=None):
 452         day = Day.from_dict(self, dict_source, date) if dict_source else Day(self, date)
 453         self.days[date] = day
 454         return day
 455
 456     def add_task(self, id_=None, dict_source=None):
 457         id_ = id_ if id_ else str(uuid4())
 458         t = Task.from_dict(self, dict_source, id_) if dict_source else Task(self, id_)
 459         self.tasks[id_] = t
 460         return t
 461
 462     def update_task(self, id_, title, default_effort, tags, subtask_ids, comment):
 463         task = self.tasks[id_] if id_ in self.tasks.keys() else self.add_task(id_)
 464         task.title.set(title)
 465         task.default_effort.set(default_effort)
 466         task.tags.set(tags)
 467         task.subtask_ids.set(subtask_ids)
 468         task.comment = comment
 469         return task
 470
 471     def add_todo(self, todo_dict=None, id_=None, task=None, efforts=None, link_into_day=True, adopt_if_possible=True):
 472         id_ = id_ if id_ else str(uuid4())
 473         if todo_dict:
 474             todo = Todo.from_dict(self, todo_dict, id_)
 475         elif task and efforts:
 476             todo = Todo(self, id_, task, efforts=efforts)
 477             deps = []
 478             for dep_task in task.subtasks:
 479                 # if Todo expects dependencies, adopt any compatibles found in DB.selected_date
 480                 # before creating new depended Todos
 481                 dep_todo = None
 482                 if adopt_if_possible and list(efforts.keys())[0] == self.selected_date:
 483                     adoptable_todos = [t for t in self.selected_day.linked_todos_as_list
 484                                        if t.task.id_ == dep_task.id_]
 485                     if len(adoptable_todos) > 0:
 486                         dep_todo = adoptable_todos[0]
 487                 if not dep_todo:
 488                     dep_todo = self.add_todo(task=dep_task, efforts=efforts,
 489                                                link_into_day=link_into_day,
 490                                                adopt_if_possible=adopt_if_possible)
 491                 deps += [dep_todo]
 492             todo.dep_ids = [dep.id_ for dep in deps]
 493         self.todos[id_] = todo
 494         if link_into_day:
 495             self.selected_day.linked_todos_as_list += [todo]
 496         return todo
 497
 498     def _update_todo_shared(self, id_, done, comment, importance):
 499         todo = self.todos[id_]
 500         todo.done = done
 501         todo.comment = comment
 502         todo.importance = importance
 503         return todo
 504
 505     def update_todo_for_day(self, id_, date, effort, done, comment, importance):
 506         todo = self._update_todo_shared(id_, done, comment, importance)
 507         todo.efforts[date] = effort
 508
 509     def update_todo(self, id_, efforts, done, comment, tags, importance, deps):
 510         todo = self._update_todo_shared(id_, done, comment, importance)
 511         if len(efforts) == 0 and not todo.deps:
 512             raise PlomException('todo must have at least one effort!')
 513         todo.deps = deps
 514         todo.efforts = efforts
 515         for date in todo.efforts.keys():
 516             if not date in self.days.keys():
 517                 self.add_day(date=date)
 518             if not self in self.days[date].linked_todos_as_list:
 519                 self.days[date].linked_todos_as_list += [todo]
 520         todo.day_tags = tags
 521
 522     def delete_todo(self, id_):
 523         todo = self.todos[id_]
 524         dates_to_delete = []
 525         for date in todo.efforts.keys():
 526             dates_to_delete += [date]
 527         for date in dates_to_delete:
 528             self.delete_effort(todo, date, force=True)
 529         for depender in todo.dependers:
 530             depender.dep_ids.remove(todo.id_)
 531         del self.todos[id_]
 532
 533     def delete_task(self, id_):
 534         del self.tasks[id_]
 535
 536     def delete_effort(self, todo, date, force=False):
 537         if (not force) and len(todo.efforts) == 1:
 538             raise PlomException('todo must retain at least one effort!')
 539         self.days[date].linked_todos_as_list.remove(todo)
 540         del todo.efforts[date]
 541
 542     # views
 543
 544     def show_message(self, message):
 545         return j2env.get_template('message.html').render(message=message)
 546
 547     def show_calendar(self, start_date_str, end_date_str):
 548         self.tag_filter_and = ['calendar']
 549         self.tag_filter_not = ['deleted']
 550         self.set_visibilities()
 551         start_date_obj, end_date_obj = self.get_limit_days_from_date_strings(start_date_str, end_date_str)
 552         days_to_show = {}
 553         for n in range(int((end_date_obj - start_date_obj).days) + 1):
 554             date_obj = start_date_obj + timedelta(n)
 555             date_str = date_obj.strftime(DATE_FORMAT)
 556             if date_str not in self.days.keys():
 557                 days_to_show[date_str] = self.add_day(date_str)
 558             else:
 559                 days_to_show[date_str] = self.days[date_str]
 560             days_to_show[date_str].month_title = date_obj.strftime('%B') if date_obj.day == 1 else None
 561             days_to_show[date_str].weekday = datetime.strptime(date_str, DATE_FORMAT).strftime('%A')[:2]
 562
 563         return j2env.get_template('calendar.html').render(
 564                 selected_date=self.selected_date,
 565                 days=days_to_show,
 566                 start_date=start_date_str,
 567                 end_date=end_date_str)
 568
 569     def show_do_todos(self, sort_order=None):
 570         prev_date_str, next_date_str = self.neighbor_dates()
 571         adoptable_past_todos = []
 572         for todo in self.todos.values():
 573             if todo.done\
 574                     or (not todo.visible)\
 575                     or todo.earliest_date >= self.selected_date:
 576                 continue
 577             adoptable_past_todos += [todo]
 578         todos = [t for t in self.selected_day.linked_todos_as_list
 579                  if t.visible]
 580                  # and not t.deps]
 581         if sort_order == 'title':
 582             todos.sort(key=lambda t: t.task.title.then)
 583         elif sort_order == 'done':
 584             todos.sort(key=lambda t: t.day_effort if t.day_effort else t.default_effort if t.done else 0, reverse=True)
 585         elif sort_order == 'default_effort':
 586             todos.sort(key=lambda t: t.default_effort, reverse=True)
 587         elif sort_order == 'importance':
 588             todos.sort(key=lambda t: t.importance, reverse=True)
 589         return j2env.get_template('do_todos.html').render(
 590                 day=self.selected_day,
 591                 tags=self.t_tags,
 592                 filter_and=self.tag_filter_and,
 593                 filter_not=self.tag_filter_not,
 594                 prev_date=prev_date_str,
 595                 adoptable_past_todos=adoptable_past_todos,
 596                 next_date=next_date_str,
 597                 all_tasks=[t for t in self.tasks.values()],
 598                 todos=todos,
 599                 sort=sort_order,
 600                 hide_done=self.hide_done)
 601
 602     def show_todo(self, id_, start_date, end_date):
 603         todo = self.todos[id_]
 604         filtered_tasks = [t for t in self.tasks.values()
 605                           if t != todo.task]
 606         filtered_todos = [t for t in self.todos.values()
 607                           if t != todo]
 608
 609         # if going into the past, only allow 3-day ranges
 610         start_day, end_day = self.get_limit_days_from_date_strings(start_date, end_date)
 611         if start_day < datetime.now() - timedelta(days=2):
 612             end_day = start_day + timedelta(days=3)
 613             end_date = end_day.strftime(DATE_FORMAT)
 614         legal_dates = []
 615         for n in range(int((end_day - start_day).days) + 1):
 616             day = start_day + timedelta(n)
 617             legal_dates += [day.strftime(DATE_FORMAT)]
 618         date_filtered_todos = []
 619         for date in legal_dates:
 620             for filtered_todo in filtered_todos:
 621                 if filtered_todo in date_filtered_todos:
 622                     continue
 623                 if date in filtered_todo.efforts.keys():
 624                     date_filtered_todos += [filtered_todo]
 625
 626         return j2env.get_template('todo.html').render(
 627                 tags=self.t_tags,
 628                 todo=todo,
 629                 filtered_todos=date_filtered_todos,
 630                 filtered_tasks=filtered_tasks,
 631                 dep_todos=todo.deps,
 632                 start_date=start_date,
 633                 end_date=end_date)
 634
 635     def show_task(self, id_):
 636         task = self.tasks[id_] if id_ else self.add_task()
 637         if not id_:
 638             task.default_effort.set(1.0)
 639         filtered_tasks = [t for t in self.tasks.values()
 640                           if t != task
 641                           and (t not in task.subtasks)]
 642         return j2env.get_template('task.html').render(
 643                 selected_date=self.selected_date,
 644                 tags=self.t_tags,
 645                 filtered_tasks=filtered_tasks,
 646                 task=task)
 647
 648     def show_tasks(self, search, sort_order=None):
 649         filtered_tasks = []
 650         for task in [t for t in self.tasks.values() if (not search) or t.matches(search)]:
 651             filtered_tasks += [task]
 652         if sort_order == 'title':
 653             filtered_tasks.sort(key=lambda t: t.title.now)
 654         elif sort_order == 'default_effort':
 655             filtered_tasks.sort(key=lambda t: t.default_effort.now, reverse=True)
 656         elif sort_order == 'depth':
 657             filtered_tasks.sort(key=lambda t: t.subtask_depth, reverse=True)
 658         return j2env.get_template('tasks.html').render(
 659                 sort=sort_order,
 660                 tasks=filtered_tasks,
 661                 tags=self.t_tags,
 662                 filter_and=self.tag_filter_and,
 663                 filter_not=self.tag_filter_not,
 664                 search=search)
 665
 666     # def show_pick_tasks(self, search, hide_chosen_tasks, sort_order=None):
 667     #     prev_date_str, next_date_str = self.neighbor_dates()
 668
 669     #     chosen_todos = self.selected_day.linked_todos_as_list
 670
 671     #     relevant_todos = []
 672     #     for todo in self.todos.values():
 673     #         if todo.done\
 674     #                 or (not todo.visible)\
 675     #                 or (not todo.matches(search))\
 676     #                 or todo.earliest_date >= self.selected_date:
 677     #             continue
 678     #         relevant_todos += [todo]
 679
 680     #     filtered_tasks = []
 681     #     chosen_tasks = [todo.task for todo in self.selected_day.linked_todos_as_list]
 682     #     for uuid, task in self.tasks.items():
 683     #         if (not task.visible)\
 684     #                 or (not task.matches(search))\
 685     #                 or (hide_chosen_tasks and task in chosen_tasks):
 686     #             continue
 687     #         filtered_tasks += [task]
 688
 689     #     if sort_order == 'title':
 690     #         chosen_todos.sort(key=lambda t: t.title)
 691     #         relevant_todos.sort(key=lambda t: t.dated_title)
 692     #         tasks.sort(key=lambda t: t.title.then)
 693     #     elif sort_order == 'effort':
 694     #         chosen_todos.sort(key=lambda t:
 695     #                           t.day_effort if t.day_effort else (t.default_effort if t.done else 0),
 696     #                           reverse=True)
 697     #         relevant_todos.sort(key=lambda t: t.all_days_effort, reverse=True)
 698     #         filtered_tasks.sort(key=lambda t: t.default_effort.then, reverse=True)
 699
 700     #     return j2env.get_template('pick_tasks.html').render(
 701     #             sort=sort_order,
 702     #             tags=self.t_tags,
 703     #             chosen_todos=chosen_todos,
 704     #             filter_and=self.tag_filter_and,
 705     #             filter_not=self.tag_filter_not,
 706     #             day=self.selected_day,
 707     #             prev_date=prev_date_str,
 708     #             next_date=next_date_str,
 709     #             all_tasks=[t for t in self.tasks.values()],
 710     #             filtered_tasks=filtered_tasks,
 711     #             hide_chosen_tasks=hide_chosen_tasks,
 712     #             relevant_todos=relevant_todos,
 713     #             search=search)
 714
 715     # helpers
 716
 717     def set_visibilities(self):
 718         for uuid, t in self.tasks.items():
 719             t.visible = len([tag for tag in self.tag_filter_and if not tag in t.tags.now]) == 0\
 720                     and len([tag for tag in self.tag_filter_not if tag in t.tags.now]) == 0\
 721                     and ((not self.hide_unchosen) or uuid in self.selected_day.todos.keys())
 722         for todo in self.todos.values():
 723             todo.visible = len([tag for tag in self.tag_filter_and if not tag in todo.day_tags | todo.task.tags.now ]) == 0\
 724                 and len([tag for tag in self.tag_filter_not if tag in todo.day_tags | todo.task.tags.now ]) == 0\
 725                 and ((not self.hide_done) or (not todo.done))
 726
 727     def get_limit_days_from_date_strings(self, start_date_str, end_date_str):
 728         todays_date_obj = datetime.strptime(today_date(), DATE_FORMAT)
 729         yesterdays_date_obj = todays_date_obj - timedelta(1)
 730         def get_day_limit_obj(index, day_limit_string):
 731             date_obj = datetime.strptime(sorted(self.days.keys())[index], DATE_FORMAT)
 732             if day_limit_string and len(day_limit_string) > 0:
 733                 if day_limit_string in {'today', 'yesterday'}:
 734                     date_obj = todays_date_obj if day_limit_string == 'today' else yesterdays_date_obj
 735                 else:
 736                     date_obj = datetime.strptime(day_limit_string, DATE_FORMAT)
 737             return date_obj
 738         start_date_obj = get_day_limit_obj(0, start_date_str)
 739         end_date_obj = get_day_limit_obj(-1, end_date_str)
 740         return start_date_obj, end_date_obj
 741
 742     def neighbor_dates(self):
 743         current_date = datetime.strptime(self.selected_date, DATE_FORMAT)
 744         prev_date = current_date - timedelta(days=1)
 745         prev_date_str = prev_date.strftime(DATE_FORMAT)
 746         next_date = current_date + timedelta(days=1)
 747         next_date_str = next_date.strftime(DATE_FORMAT)
 748         return prev_date_str, next_date_str
 749
 750
 751
 752 class ParamsParser:
 753
 754     def __init__(self, parsed_url_query, cookie_db):
 755         self.params = parse_qs(parsed_url_query)
 756         self.cookie_db = cookie_db
 757
 758     def get(self, key, default=None):
 759         boolean = bool == type(default)
 760         param = self.params.get(key, [default])[0]
 761         if boolean:
 762             param = param != '0'
 763         return param
 764
 765     def cookie_key_from_params_key(self, prefix, key):
 766         return f'{prefix}:{key}' if prefix else key
 767
 768     def get_cookied(self, key, default=None, prefix=None):
 769         cookie_key = self.cookie_key_from_params_key(prefix, key)
 770         param = self.get(key, default)
 771         if param == '-':
 772             param = None
 773             if cookie_key in self.cookie_db.keys():
 774                 del self.cookie_db[cookie_key]
 775         if param is None and cookie_key in self.cookie_db.keys():
 776             param = self.cookie_db[cookie_key]
 777         if param is not None:
 778             self.cookie_db[cookie_key] = param
 779         return param
 780
 781     def get_cookied_chain(self, key, default=None, prefix=None):
 782         cookie_key = self.cookie_key_from_params_key(prefix, key)
 783         params = self.params.get(key, default)
 784         if params == ['-']:
 785             params = None
 786             if cookie_key in self.cookie_db.keys():
 787                 del self.cookie_db[cookie_key]
 788         if params is None and cookie_key in self.cookie_db.keys():
 789             params = self.cookie_db[cookie_key]
 790         if params is not None:
 791             self.cookie_db[cookie_key] = params
 792         return params
 793
 794
 795 class PostvarsParser:
 796
 797     def __init__(self, postvars):
 798         self.postvars = postvars
 799
 800     def has(self, key):
 801         return key in self.postvars.keys()
 802
 803     def get(self, key, on_empty=None, float_if_possible=False):
 804         return self.get_at_index(key, 0, on_empty, float_if_possible)
 805
 806     def get_at_index(self, key, i, on_empty=None, float_if_possible=False):
 807         if self.has(key) and len(self.postvars[key][i]) > 0:
 808             val = self.postvars[key][i]
 809         else:
 810             val = on_empty
 811         if float_if_possible and val is not None:
 812             return float(val)
 813         else:
 814             return val
 815
 816     def get_all(self, key, on_empty=None):
 817         if self.has(key) and len(self.postvars[key]) > 0:
 818             return [v for v in self.postvars[key] if len(v) > 0]
 819         return on_empty
 820
 821     def set(self, key, value):
 822         self.postvars[key] = [value]
 823
 824
 825 class TodoHandler(PlomHandler):
 826
 827     def config_init(self):
 828         return {
 829             'cookie_name': 'todo_cookie',
 830             'cookie_path': '/'
 831         }
 832
 833     def app_init(self, handler):
 834         default_path = '/todo'
 835         handler.add_route('GET', default_path, self.show_db)
 836         handler.add_route('POST', default_path, self.write_db)
 837         return 'todo', {'cookie_name': 'todo_cookie', 'cookie_path': default_path}
 838
 839     def do_POST(self):
 840         self.try_do(self.write_db)
 841
 842     def write_db(self):
 843         from urllib.parse import urlencode
 844         config = self.apps['todo'] if hasattr(self, 'apps') else self.config_init()
 845         parsed_url = urlparse(self.path)
 846         site = path_split(parsed_url.path)[1]
 847         length = int(self.headers['content-length'])
 848         postvars = PostvarsParser(parse_qs(self.rfile.read(length).decode(), keep_blank_values=1))
 849
 850         db = TodoDB()
 851         redir_params = []
 852         # if we do encounter a filter post, we repost it (and if empty, the emptying command '-')
 853         for param_name, filter_db_name in {('and_tag', 'tag_filter_and'), ('not_tag', 'tag_filter_not')}:
 854             filter_db = getattr(db, filter_db_name)
 855             if postvars.has(param_name):
 856                 for target in postvars.get_all(param_name, []):
 857                     if len(target) > 0 and not target in filter_db:
 858                         filter_db += [target]
 859                 if len(filter_db) == 0:
 860                     redir_params += [(param_name, '-')]
 861             redir_params += [(param_name, f) for f in filter_db]
 862         if site in {'calendar', 'todo'}:
 863             redir_params += [('end', postvars.get('end', '-'))]
 864             redir_params += [('start', postvars.get('start', '-'))]
 865         # if site in {'tasks', 'pick_tasks'}:
 866         #     redir_params += [('search', postvars.get('search', ''))]
 867         if postvars.has('filter'):
 868             postvars.set('return_to', '')
 869
 870         if 'tasks' == site:
 871             redir_params += [('search', postvars.get('search', ''))]
 872
 873         elif 'todo' == site:
 874             todo_id = postvars.get('todo_id')
 875             redir_params += [('id', todo_id)]
 876             old_todo = db.todos[todo_id] if todo_id in db.todos.keys() else None
 877             efforts = {}
 878             latest_date = db.selected_date
 879             for i, date in enumerate(postvars.get_all('effort_date', [])):
 880                 if '' == date:
 881                     continue
 882                 try:
 883                     datetime.strptime(date, DATE_FORMAT)
 884                 except ValueError:
 885                     raise PlomException(f'bad date string')
 886                 latest_date = date
 887                 efforts[date] = None
 888                 if not (old_todo and old_todo.deps):
 889                     efforts[date] = postvars.get_at_index('effort', i, on_empty=None,
 890                                                           float_if_possible=True)
 891             if postvars.has('delete'):
 892                 has_day_effort = len([e for e in efforts.values() if e is not None]) > 0
 893                 if postvars.has('done')\
 894                         or postvars.get('comment')\
 895                         or postvars.get_all('tag', [])\
 896                         or has_day_effort:
 897                     raise PlomException('will not remove todo of preserve-worthy values')
 898                 db.delete_todo(todo_id)
 899                 postvars.set('return_to', 'calendar')
 900             elif postvars.has('update'):
 901                 if postvars.has('delete_effort'):
 902                     for date in postvars.get_all('delete_effort'):
 903                         db.delete_effort(old_todo, date)
 904                         del efforts[date]
 905                 deps = [db.todos[id_] for id_ in postvars.get_all('adopt_dep', [])
 906                         if id_ in db.todos.keys()]
 907                 for dep in deps:
 908                     if not todo_id in [t.id_ for t in dep.dependers]:
 909                         dep.dependers += [db.todos[todo_id]]
 910                 tasks_to_birth = [db.tasks[id_] for id_ in postvars.get_all('birth_dep', [])]
 911                 for task in tasks_to_birth:
 912                     deps += [db.add_todo(task=task, efforts={latest_date: None})]
 913                 db.update_todo(id_=todo_id,
 914                                efforts=efforts,
 915                                done=postvars.has('done'),
 916                                comment=postvars.get('comment', ''),
 917                                tags=postvars.get_all('tag', []),
 918                                importance=float(postvars.get('importance')),
 919                                deps=deps)
 920
 921         elif 'task' == site:
 922             task_id = postvars.get('task_id')
 923             if postvars.has('delete') and task_id in db.tasks.keys():
 924                 if [t for t in db.todos.values() if task_id == t.task.id_]:
 925                     raise PlomException('will not remove Task describing existing Todos')
 926                 if postvars.get('title', '')\
 927                         or postvars.get_all('tag', [])\
 928                         or postvars.get_all('subtask', [])\
 929                         or postvars.get('comment', ''):
 930                     raise PlomException('will not remove Task of preserve-worthy values')
 931                 db.delete_task(task_id)
 932             elif postvars.has('update'):
 933                 task = db.update_task(
 934                         id_=task_id,
 935                         title=postvars.get('title', ''),
 936                         default_effort=postvars.get('default_effort', float_if_possible=True),
 937                         tags=postvars.get_all('tag', []),
 938                         subtask_ids=postvars.get_all('subtask', []),
 939                         comment=postvars.get('comment', ''))
 940                 if postvars.has('add_as_todo'):
 941                     db.add_todo(task=task, efforts={postvars.get('selected_date'): None})
 942             redir_params += [('id', task_id)]
 943
 944         # elif 'pick_tasks' == site:
 945         #     redir_params += [('hide_chosen_tasks', int(postvars.has('hide_chosen_tasks')))]
 946         #     if postvars.has('update'):
 947         #         db.selected_date = postvars.get('date')
 948         #         todos_to_shrink = []
 949         #         todos_to_delete = []
 950         #         for todo in db.selected_day.linked_todos_as_list:
 951         #             if todo.visible and not todo.id_ in postvars.get_all('chosen_todo', []):
 952         #                 if len(todo.comment) > 0\
 953         #                         or len(todo.day_tags) > 0\
 954         #                         or not todo.is_effort_removable(db.selected_date):
 955         #                     raise PlomException('will not remove effort of preserve-worthy values')
 956         #                 if len(todo.efforts) > 1:
 957         #                     todos_to_shrink += [todo]
 958         #                 else:
 959         #                     todos_to_delete += [todo]
 960         #         for todo in todos_to_shrink:
 961         #             db.delete_effort(todo, db.selected_date)
 962         #         for todo in todos_to_delete:
 963         #             db.delete_todo(todo.id_)
 964         #         for id_ in postvars.get_all('choose_task', []):
 965         #             db.add_todo(task=db.tasks[id_], efforts={db.selected_date: None})
 966         #         for id_ in postvars.get_all('choose_todo', []):
 967         #             db.todos[id_].efforts[db.selected_date] = None
 968
 969         elif 'do_todos' == site:
 970             redir_params += [('hide_done', int(postvars.has('hide_done')))]
 971             if postvars.has('update'):
 972                 db.selected_date = postvars.get('date')
 973                 redir_params += [('date', db.selected_date)]
 974                 db.selected_day.comment = postvars.get('day_comment', '')
 975                 task_id = postvars.get('choose_task', None)
 976                 if task_id:
 977                     if task_id not in db.tasks.keys():
 978                         raise PlomException('illegal task ID entered')
 979                     db.add_todo(task=db.tasks[task_id], efforts={db.selected_date: None},
 980                                 adopt_if_possible=(not postvars.has('dont_adopt')))
 981                 for id_ in postvars.get_all('choose_todo', []):
 982                     db.todos[id_].efforts[db.selected_date] = None
 983                 for i, todo_id in enumerate(postvars.get_all('todo_id', [])):
 984                     old_todo = db.todos[todo_id]
 985                     done = todo_id in postvars.get_all('done', [])
 986                     day_effort_input = postvars.get_at_index('effort', i, '')
 987                     day_effort = float(day_effort_input) if len(day_effort_input) > 0 else None
 988                     comment = postvars.get_at_index('effort_comment', i, '')
 989                     if (day_effort is not None) and (not done) and day_effort < 0 and 0 == len(comment):
 990                         if len(old_todo.efforts) > 1:
 991                             db.delete_effort(old_todo, db.selected_date)
 992                         else:
 993                             db.delete_todo(todo_id)
 994                         continue
 995                     importance = float(postvars.get_at_index('importance', i))
 996                     if old_todo\
 997                             and old_todo.done == done\
 998                             and old_todo.day_effort == day_effort\
 999                             and comment == old_todo.comment\
1000                             and old_todo.importance == importance:
1001                         continue
1002                     db.update_todo_for_day(
1003                             todo_id,
1004                             db.selected_date,
1005                             day_effort,
1006                             done,
1007                             comment,
1008                             importance)
1009
1010         homepage = postvars.get('return_to')
1011         if not homepage:
1012             encoded_params = urlencode(redir_params)
1013             homepage = f'{site}?{encoded_params}'
1014         db.write()
1015         self.redirect(homepage)
1016
1017     def do_GET(self):
1018         self.try_do(self.show_db)
1019
1020     def show_db(self):
1021         config = self.apps['todo'] if hasattr(self, 'apps') else self.config_init()
1022         parsed_url = urlparse(self.path)
1023         site = path_split(parsed_url.path)[1]
1024         cookie_db = self.get_cookie_db(config['cookie_name'])
1025         params = ParamsParser(parsed_url.query, cookie_db)
1026
1027         selected_date = tag_filter_and = tag_filter_not = None
1028         hide_unchosen = hide_done = False
1029         return_to = params.get('return_to', '')
1030         if site in {'do_todos', 'calendar', 'task'}:
1031             selected_date = params.get_cookied('date')
1032         if site in {'do_todos', 'tasks'}:
1033             tag_filter_and = params.get_cookied_chain('and_tag', prefix=site)
1034             tag_filter_not = params.get_cookied_chain('not_tag', prefix=site)
1035         if 'do_todos' == site:
1036             hide_done = params.get('hide_done', False)
1037         db = TodoDB(selected_date, tag_filter_and, tag_filter_not, hide_unchosen, hide_done)
1038         if site in {'todo', 'task'}:
1039             id_ = params.get('id')
1040         if site in {'do_todos', 'tasks'}:
1041             sort_order = params.get_cookied('sort', prefix=site)
1042         if site in {'', 'calendar', 'todo'}:
1043             start_date = params.get_cookied('start', prefix=site)
1044             end_date = params.get_cookied('end', prefix=site)
1045         if 'reset_cookie' == site:
1046             cookie_db = {  # sensible defaults
1047                 # params.cookie_key_from_params_key('pick_tasks', 'and_tag'): ['default'],
1048                 # params.cookie_key_from_params_key('pick_tasks', 'not_tag'): ['ignore'],
1049                 params.cookie_key_from_params_key('todo', 'and_tag'): ['default'],
1050                 params.cookie_key_from_params_key('todo', 'not_tag'): ['ignore'],
1051                 params.cookie_key_from_params_key('todo', 'start'): 'yesterday',
1052                 params.cookie_key_from_params_key('todo', 'end'): 'today'}
1053             page = db.show_message('cookie unset!')
1054         elif 'do_todos' == site:
1055             page = db.show_do_todos(sort_order)
1056         # elif 'pick_tasks' == site:
1057         #     hide_chosen_tasks = params.get('hide_chosen_tasks', False)
1058         #     page = db.show_pick_tasks(search, hide_chosen_tasks, sort_order)
1059         elif site == 'todo':
1060             page = db.show_todo(id_, start_date, end_date)
1061         elif 'task' == site:
1062             page = db.show_task(id_)
1063         elif 'tasks' == site:
1064             search = params.get('search', '')
1065             page = db.show_tasks(search, sort_order)
1066         elif 'add_task' == site:
1067             page = db.show_task(None)
1068         else:  # 'calendar' == site
1069             page = db.show_calendar(start_date, end_date)
1070
1071         self.set_cookie(config['cookie_name'], config['cookie_path'], cookie_db)
1072         self.send_HTML(page)
1073
1074
1075 if __name__ == "__main__":
1076     run_server(server_port, TodoHandler)