plomlompom.com Git - plomtask/blob - plomtask/http.py

   1 """Web server stuff."""
   2 from __future__ import annotations
   3 from dataclasses import dataclass
   4 from typing import Any, Callable
   5 from base64 import b64encode, b64decode
   6 from http.server import BaseHTTPRequestHandler
   7 from http.server import HTTPServer
   8 from urllib.parse import urlparse, parse_qs
   9 from os.path import split as path_split
  10 from jinja2 import Environment as JinjaEnv, FileSystemLoader as JinjaFSLoader
  11 from plomtask.dating import date_in_n_days
  12 from plomtask.days import Day
  13 from plomtask.exceptions import HandledException, BadFormatException, \
  14         NotFoundException
  15 from plomtask.db import DatabaseConnection, DatabaseFile
  16 from plomtask.processes import Process, ProcessStep, ProcessStepsNode
  17 from plomtask.conditions import Condition
  18 from plomtask.todos import Todo
  19
  20 TEMPLATES_DIR = 'templates'
  21
  22
  23 class TaskServer(HTTPServer):
  24     """Variant of HTTPServer that knows .jinja as Jinja Environment."""
  25
  26     def __init__(self, db_file: DatabaseFile,
  27                  *args: Any, **kwargs: Any) -> None:
  28         super().__init__(*args, **kwargs)
  29         self.db = db_file
  30         self.jinja = JinjaEnv(loader=JinjaFSLoader(TEMPLATES_DIR))
  31
  32
  33 class InputsParser:
  34     """Wrapper for validating and retrieving dict-like HTTP inputs."""
  35
  36     def __init__(self, dict_: dict[str, list[str]],
  37                  strictness: bool = True) -> None:
  38         self.inputs = dict_
  39         self.strict = strictness
  40
  41     def get_str(self, key: str, default: str = '',
  42                 ignore_strict: bool = False) -> str:
  43         """Retrieve single/first string value of key, or default."""
  44         if key not in self.inputs.keys() or 0 == len(self.inputs[key]):
  45             if self.strict and not ignore_strict:
  46                 raise BadFormatException(f'no value found for key {key}')
  47             return default
  48         return self.inputs[key][0]
  49
  50     def get_first_strings_starting(self, prefix: str) -> dict[str, str]:
  51         """Retrieve dict of (first) strings at key starting with prefix."""
  52         ret = {}
  53         for key in [k for k in self.inputs.keys() if k.startswith(prefix)]:
  54             ret[key] = self.inputs[key][0]
  55         return ret
  56
  57     def get_int(self, key: str) -> int:
  58         """Retrieve single/first value of key as int, error if empty."""
  59         val = self.get_int_or_none(key)
  60         if val is None:
  61             raise BadFormatException(f'unexpected empty value for: {key}')
  62         return val
  63
  64     def get_int_or_none(self, key: str) -> int | None:
  65         """Retrieve single/first value of key as int, return None if empty."""
  66         val = self.get_str(key, ignore_strict=True)
  67         if val == '':
  68             return None
  69         try:
  70             return int(val)
  71         except ValueError as e:
  72             msg = f'cannot int form field value for key {key}: {val}'
  73             raise BadFormatException(msg) from e
  74
  75     def get_float(self, key: str) -> float:
  76         """Retrieve float value of key from self.postvars."""
  77         val = self.get_str(key)
  78         try:
  79             return float(val)
  80         except ValueError as e:
  81             msg = f'cannot float form field value for key {key}: {val}'
  82             raise BadFormatException(msg) from e
  83
  84     def get_all_str(self, key: str) -> list[str]:
  85         """Retrieve list of string values at key."""
  86         if key not in self.inputs.keys():
  87             return []
  88         return self.inputs[key]
  89
  90     def get_all_int(self, key: str) -> list[int]:
  91         """Retrieve list of int values at key."""
  92         all_str = self.get_all_str(key)
  93         try:
  94             return [int(s) for s in all_str if len(s) > 0]
  95         except ValueError as e:
  96             msg = f'cannot int a form field value for key {key} in: {all_str}'
  97             raise BadFormatException(msg) from e
  98
  99
 100 class TaskHandler(BaseHTTPRequestHandler):
 101     """Handles single HTTP request."""
 102     # pylint: disable=too-many-public-methods
 103     server: TaskServer
 104     conn: DatabaseConnection
 105     _site: str
 106     _form_data: InputsParser
 107     _params: InputsParser
 108
 109     def _send_html(self, html: str, code: int = 200) -> None:
 110         """Send HTML as proper HTTP response."""
 111         self.send_response(code)
 112         self.end_headers()
 113         self.wfile.write(bytes(html, 'utf-8'))
 114
 115     @staticmethod
 116     def _request_wrapper(http_method: str, not_found_msg: str
 117                          ) -> Callable[..., Callable[[TaskHandler], None]]:
 118         def decorator(f: Callable[..., str | None]
 119                       ) -> Callable[[TaskHandler], None]:
 120             def wrapper(self: TaskHandler) -> None:
 121                 # pylint: disable=protected-access
 122                 # (because pylint here fails to detect the use of wrapper as a
 123                 # method to self with respective access privileges)
 124                 try:
 125                     self.conn = DatabaseConnection(self.server.db)
 126                     parsed_url = urlparse(self.path)
 127                     self._site = path_split(parsed_url.path)[1]
 128                     params = parse_qs(parsed_url.query, strict_parsing=True)
 129                     self._params = InputsParser(params, False)
 130                     handler_name = f'do_{http_method}_{self._site}'
 131                     if hasattr(self, handler_name):
 132                         handler = getattr(self, handler_name)
 133                         redir_target = f(self, handler)
 134                         if redir_target:
 135                             self.send_response(302)
 136                             self.send_header('Location', redir_target)
 137                             self.end_headers()
 138                     else:
 139                         msg = f'{not_found_msg}: {self._site}'
 140                         raise NotFoundException(msg)
 141                 except HandledException as error:
 142                     html = self.server.jinja.\
 143                             get_template('msg.html').render(msg=error)
 144                     self._send_html(html, error.http_code)
 145                 finally:
 146                     self.conn.close()
 147             return wrapper
 148         return decorator
 149
 150     @_request_wrapper('GET', 'Unknown page')
 151     def do_GET(self, handler: Callable[[], str | dict[str, object]]
 152                ) -> str | None:
 153         """Render page with result of handler, or redirect if result is str."""
 154         template = f'{self._site}.html'
 155         ctx_or_redir = handler()
 156         if str == type(ctx_or_redir):
 157             return ctx_or_redir
 158         assert isinstance(ctx_or_redir, dict)
 159         html = self.server.jinja.get_template(template).render(**ctx_or_redir)
 160         self._send_html(html)
 161         return None
 162
 163     @_request_wrapper('POST', 'Unknown POST target')
 164     def do_POST(self, handler: Callable[[], str]) -> str:
 165         """Handle POST with handler, prepare redirection to result."""
 166         length = int(self.headers['content-length'])
 167         postvars = parse_qs(self.rfile.read(length).decode(),
 168                             keep_blank_values=True, strict_parsing=True)
 169         self._form_data = InputsParser(postvars)
 170         redir_target = handler()
 171         self.conn.commit()
 172         return redir_target
 173
 174     # GET handlers
 175
 176     def do_GET_(self) -> str:
 177         """Return redirect target on GET /."""
 178         return '/day'
 179
 180     def _do_GET_calendar(self) -> dict[str, object]:
 181         """Show Days from ?start= to ?end=.
 182
 183         Both .do_GET_calendar and .do_GET_calendar_txt refer to this to do the
 184         same, the only difference being the HTML template they are rendered to,
 185         which .do_GET selects from their method name.
 186         """
 187         start = self._params.get_str('start')
 188         end = self._params.get_str('end')
 189         if not end:
 190             end = date_in_n_days(366)
 191         ret = Day.by_date_range_with_limits(self.conn, (start, end), 'id')
 192         days, start, end = ret
 193         days = Day.with_filled_gaps(days, start, end)
 194         today = date_in_n_days(0)
 195         return {'start': start, 'end': end, 'days': days, 'today': today}
 196
 197     def do_GET_calendar(self) -> dict[str, object]:
 198         """Show Days from ?start= to ?end= – normal view."""
 199         return self._do_GET_calendar()
 200
 201     def do_GET_calendar_txt(self) -> dict[str, object]:
 202         """Show Days from ?start= to ?end= – minimalist view."""
 203         return self._do_GET_calendar()
 204
 205     def do_GET_day(self) -> dict[str, object]:
 206         """Show single Day of ?date=."""
 207         date = self._params.get_str('date', date_in_n_days(0))
 208         day = Day.by_id(self.conn, date, create=True,
 209                         init_empty_todo_list=True)
 210         make_type = self._params.get_str('make_type')
 211         conditions_present = []
 212         enablers_for = {}
 213         disablers_for = {}
 214         for todo in day.todos:
 215             for condition in todo.conditions + todo.blockers:
 216                 if condition not in conditions_present:
 217                     conditions_present += [condition]
 218                     enablers_for[condition.id_] = [p for p in
 219                                                    Process.all(self.conn)
 220                                                    if condition in p.enables]
 221                     disablers_for[condition.id_] = [p for p in
 222                                                     Process.all(self.conn)
 223                                                     if condition in p.disables]
 224         seen_todos: set[int] = set()
 225         top_nodes = [t.get_step_tree(seen_todos)
 226                      for t in day.todos if not t.parents]
 227         return {'day': day,
 228                 'top_nodes': top_nodes,
 229                 'make_type': make_type,
 230                 'enablers_for': enablers_for,
 231                 'disablers_for': disablers_for,
 232                 'conditions_present': conditions_present,
 233                 'processes': Process.all(self.conn)}
 234
 235     def do_GET_todo(self) -> dict[str, object]:
 236         """Show single Todo of ?id=."""
 237
 238         @dataclass
 239         class TodoStepsNode:
 240             """Collect what's useful for Todo steps tree display."""
 241             id_: int
 242             todo: Todo | None
 243             process: Process | None
 244             children: list[TodoStepsNode]  # pylint: disable=undefined-variable
 245             fillable: bool = False
 246
 247         def walk_process_steps(id_: int,
 248                                process_step_nodes: list[ProcessStepsNode],
 249                                steps_nodes: list[TodoStepsNode]) -> None:
 250             for process_step_node in process_step_nodes:
 251                 id_ += 1
 252                 node = TodoStepsNode(id_, None, process_step_node.process, [])
 253                 steps_nodes += [node]
 254                 walk_process_steps(id_, list(process_step_node.steps.values()),
 255                                    node.children)
 256
 257         def walk_todo_steps(id_: int, todos: list[Todo],
 258                             steps_nodes: list[TodoStepsNode]) -> None:
 259             for todo in todos:
 260                 matched = False
 261                 for match in [item for item in steps_nodes
 262                               if item.process
 263                               and item.process == todo.process]:
 264                     match.todo = todo
 265                     matched = True
 266                     for child in match.children:
 267                         child.fillable = True
 268                     walk_todo_steps(id_, todo.children, match.children)
 269                 if not matched:
 270                     id_ += 1
 271                     node = TodoStepsNode(id_, todo, None, [])
 272                     steps_nodes += [node]
 273                     walk_todo_steps(id_, todo.children, node.children)
 274
 275         def collect_adoptables_keys(steps_nodes: list[TodoStepsNode]
 276                                     ) -> set[int]:
 277             ids = set()
 278             for node in steps_nodes:
 279                 if not node.todo:
 280                     assert isinstance(node.process, Process)
 281                     assert isinstance(node.process.id_, int)
 282                     ids.add(node.process.id_)
 283                 ids = ids | collect_adoptables_keys(node.children)
 284             return ids
 285
 286         id_ = self._params.get_int('id')
 287         todo = Todo.by_id(self.conn, id_)
 288         todo_steps = [step.todo for step in todo.get_step_tree(set()).children]
 289         process_tree = todo.process.get_steps(self.conn, None)
 290         steps_todo_to_process: list[TodoStepsNode] = []
 291         walk_process_steps(0, list(process_tree.values()),
 292                            steps_todo_to_process)
 293         for steps_node in steps_todo_to_process:
 294             steps_node.fillable = True
 295         walk_todo_steps(len(steps_todo_to_process), todo_steps,
 296                         steps_todo_to_process)
 297         adoptables: dict[int, list[Todo]] = {}
 298         any_adoptables = [Todo.by_id(self.conn, t.id_)
 299                           for t in Todo.by_date(self.conn, todo.date)
 300                           if t != todo]
 301         for id_ in collect_adoptables_keys(steps_todo_to_process):
 302             adoptables[id_] = [t for t in any_adoptables
 303                                if t.process.id_ == id_]
 304         return {'todo': todo, 'steps_todo_to_process': steps_todo_to_process,
 305                 'adoption_candidates_for': adoptables,
 306                 'process_candidates': Process.all(self.conn),
 307                 'todo_candidates': any_adoptables,
 308                 'condition_candidates': Condition.all(self.conn)}
 309
 310     def do_GET_todos(self) -> dict[str, object]:
 311         """Show Todos from ?start= to ?end=, of ?process=, ?comment= pattern"""
 312         sort_by = self._params.get_str('sort_by')
 313         start = self._params.get_str('start')
 314         end = self._params.get_str('end')
 315         process_id = self._params.get_int_or_none('process_id')
 316         comment_pattern = self._params.get_str('comment_pattern')
 317         todos = []
 318         ret = Todo.by_date_range_with_limits(self.conn, (start, end))
 319         todos_by_date_range, start, end = ret
 320         todos = [t for t in todos_by_date_range
 321                  if comment_pattern in t.comment
 322                  and ((not process_id) or t.process.id_ == process_id)]
 323         if sort_by == 'doneness':
 324             todos.sort(key=lambda t: t.is_done)
 325         elif sort_by == '-doneness':
 326             todos.sort(key=lambda t: t.is_done, reverse=True)
 327         elif sort_by == 'title':
 328             todos.sort(key=lambda t: t.title_then)
 329         elif sort_by == '-title':
 330             todos.sort(key=lambda t: t.title_then, reverse=True)
 331         elif sort_by == 'comment':
 332             todos.sort(key=lambda t: t.comment)
 333         elif sort_by == '-comment':
 334             todos.sort(key=lambda t: t.comment, reverse=True)
 335         elif sort_by == '-date':
 336             todos.sort(key=lambda t: t.date, reverse=True)
 337         else:
 338             todos.sort(key=lambda t: t.date)
 339         return {'start': start, 'end': end, 'process_id': process_id,
 340                 'comment_pattern': comment_pattern, 'todos': todos,
 341                 'all_processes': Process.all(self.conn), 'sort_by': sort_by}
 342
 343     def do_GET_conditions(self) -> dict[str, object]:
 344         """Show all Conditions."""
 345         pattern = self._params.get_str('pattern')
 346         conditions = Condition.matching(self.conn, pattern)
 347         sort_by = self._params.get_str('sort_by')
 348         if sort_by == 'is_active':
 349             conditions.sort(key=lambda c: c.is_active)
 350         elif sort_by == '-is_active':
 351             conditions.sort(key=lambda c: c.is_active, reverse=True)
 352         elif sort_by == '-title':
 353             conditions.sort(key=lambda c: c.title.newest, reverse=True)
 354         else:
 355             conditions.sort(key=lambda c: c.title.newest)
 356         return {'conditions': conditions,
 357                 'sort_by': sort_by,
 358                 'pattern': pattern}
 359
 360     def do_GET_condition(self) -> dict[str, object]:
 361         """Show Condition of ?id=."""
 362         id_ = self._params.get_int_or_none('id')
 363         c = Condition.by_id(self.conn, id_, create=True)
 364         ps = Process.all(self.conn)
 365         return {'condition': c, 'is_new': c.id_ is None,
 366                 'enabled_processes': [p for p in ps if c in p.conditions],
 367                 'disabled_processes': [p for p in ps if c in p.blockers],
 368                 'enabling_processes': [p for p in ps if c in p.enables],
 369                 'disabling_processes': [p for p in ps if c in p.disables]}
 370
 371     def do_GET_condition_titles(self) -> dict[str, object]:
 372         """Show title history of Condition of ?id=."""
 373         id_ = self._params.get_int_or_none('id')
 374         condition = Condition.by_id(self.conn, id_)
 375         return {'condition': condition}
 376
 377     def do_GET_condition_descriptions(self) -> dict[str, object]:
 378         """Show description historys of Condition of ?id=."""
 379         id_ = self._params.get_int_or_none('id')
 380         condition = Condition.by_id(self.conn, id_)
 381         return {'condition': condition}
 382
 383     def do_GET_process(self) -> dict[str, object]:
 384         """Show Process of ?id=."""
 385         id_ = self._params.get_int_or_none('id')
 386         process = Process.by_id(self.conn, id_, create=True)
 387         title_64 = self._params.get_str('title_b64')
 388         if title_64:
 389             title = b64decode(title_64.encode()).decode()
 390             process.title.set(title)
 391         owners = process.used_as_step_by(self.conn)
 392         for step_id in self._params.get_all_int('step_to'):
 393             owners += [Process.by_id(self.conn, step_id)]
 394         preset_top_step = None
 395         for process_id in self._params.get_all_int('has_step'):
 396             preset_top_step = process_id
 397         return {'process': process, 'is_new': process.id_ is None,
 398                 'preset_top_step': preset_top_step,
 399                 'steps': process.get_steps(self.conn), 'owners': owners,
 400                 'n_todos': len(Todo.by_process_id(self.conn, process.id_)),
 401                 'process_candidates': Process.all(self.conn),
 402                 'condition_candidates': Condition.all(self.conn)}
 403
 404     def do_GET_process_titles(self) -> dict[str, object]:
 405         """Show title history of Process of ?id=."""
 406         id_ = self._params.get_int_or_none('id')
 407         process = Process.by_id(self.conn, id_)
 408         return {'process': process}
 409
 410     def do_GET_process_descriptions(self) -> dict[str, object]:
 411         """Show description historys of Process of ?id=."""
 412         id_ = self._params.get_int_or_none('id')
 413         process = Process.by_id(self.conn, id_)
 414         return {'process': process}
 415
 416     def do_GET_process_efforts(self) -> dict[str, object]:
 417         """Show default effort history of Process of ?id=."""
 418         id_ = self._params.get_int_or_none('id')
 419         process = Process.by_id(self.conn, id_)
 420         return {'process': process}
 421
 422     def do_GET_processes(self) -> dict[str, object]:
 423         """Show all Processes."""
 424         pattern = self._params.get_str('pattern')
 425         processes = Process.matching(self.conn, pattern)
 426         sort_by = self._params.get_str('sort_by')
 427         if sort_by == 'steps':
 428             processes.sort(key=lambda p: len(p.explicit_steps))
 429         elif sort_by == '-steps':
 430             processes.sort(key=lambda p: len(p.explicit_steps), reverse=True)
 431         elif sort_by == 'owners':
 432             processes.sort(key=lambda p: p.n_owners or 0)
 433         elif sort_by == '-owners':
 434             processes.sort(key=lambda p: p.n_owners or 0, reverse=True)
 435         elif sort_by == 'effort':
 436             processes.sort(key=lambda p: p.effort.newest)
 437         elif sort_by == '-effort':
 438             processes.sort(key=lambda p: p.effort.newest, reverse=True)
 439         elif sort_by == '-title':
 440             processes.sort(key=lambda p: p.title.newest, reverse=True)
 441         else:
 442             processes.sort(key=lambda p: p.title.newest)
 443         return {'processes': processes, 'sort_by': sort_by, 'pattern': pattern}
 444
 445     # POST handlers
 446
 447     def _change_versioned_timestamps(self, cls: Any, attr_name: str) -> str:
 448         """Update history timestamps for VersionedAttribute."""
 449         id_ = self._params.get_int_or_none('id')
 450         item = cls.by_id(self.conn, id_)
 451         attr = getattr(item, attr_name)
 452         for k, v in self._form_data.get_first_strings_starting('at:').items():
 453             old = k[3:]
 454             if old[19:] != v:
 455                 attr.reset_timestamp(old, f'{v}.0')
 456         attr.save(self.conn)
 457         cls_name = cls.__name__.lower()
 458         return f'/{cls_name}_{attr_name}s?id={item.id_}'
 459
 460     def do_POST_day(self) -> str:
 461         """Update or insert Day of date and Todos mapped to it."""
 462         date = self._params.get_str('date')
 463         day = Day.by_id(self.conn, date, create=True)
 464         day.comment = self._form_data.get_str('day_comment')
 465         day.save(self.conn)
 466         make_type = self._form_data.get_str('make_type')
 467         for process_id in sorted(self._form_data.get_all_int('new_todo')):
 468             if 'empty' == make_type:
 469                 process = Process.by_id(self.conn, process_id)
 470                 todo = Todo(None, process, False, date)
 471                 todo.save(self.conn)
 472             else:
 473                 Todo.create_with_children(self.conn, process_id, date)
 474         done_ids = self._form_data.get_all_int('done')
 475         comments = self._form_data.get_all_str('comment')
 476         efforts = self._form_data.get_all_str('effort')
 477         for i, todo_id in enumerate(self._form_data.get_all_int('todo_id')):
 478             todo = Todo.by_id(self.conn, todo_id)
 479             todo.is_done = todo_id in done_ids
 480             if len(comments) > 0:
 481                 todo.comment = comments[i]
 482             if len(efforts) > 0:
 483                 todo.effort = float(efforts[i]) if efforts[i] else None
 484             todo.save(self.conn)
 485             for condition in todo.enables:
 486                 condition.save(self.conn)
 487             for condition in todo.disables:
 488                 condition.save(self.conn)
 489         return f'/day?date={date}&make_type={make_type}'
 490
 491     def do_POST_todo(self) -> str:
 492         """Update Todo and its children."""
 493         # pylint: disable=too-many-locals
 494         # pylint: disable=too-many-branches
 495         id_ = self._params.get_int('id')
 496         for _ in self._form_data.get_all_str('delete'):
 497             todo = Todo .by_id(self.conn, id_)
 498             todo.remove(self.conn)
 499             return '/'
 500         todo = Todo.by_id(self.conn, id_)
 501         adopted_child_ids = self._form_data.get_all_int('adopt')
 502         processes_to_make_full = self._form_data.get_all_int('make_full')
 503         processes_to_make_empty = self._form_data.get_all_int('make_empty')
 504         fill_fors = self._form_data.get_first_strings_starting('fill_for_')
 505         for v in fill_fors.values():
 506             if v.startswith('make_empty_'):
 507                 processes_to_make_empty += [int(v[11:])]
 508             elif v.startswith('make_full_'):
 509                 processes_to_make_full += [int(v[10:])]
 510             elif v != 'ignore':
 511                 adopted_child_ids += [int(v)]
 512         to_remove = []
 513         for child in todo.children:
 514             assert isinstance(child.id_, int)
 515             if child.id_ not in adopted_child_ids:
 516                 to_remove += [child.id_]
 517         for id_ in to_remove:
 518             child = Todo.by_id(self.conn, id_)
 519             todo.remove_child(child)
 520         for child_id in adopted_child_ids:
 521             if child_id in [c.id_ for c in todo.children]:
 522                 continue
 523             child = Todo.by_id(self.conn, child_id)
 524             todo.add_child(child)
 525         for process_id in processes_to_make_empty:
 526             process = Process.by_id(self.conn, process_id)
 527             made = Todo(None, process, False, todo.date)
 528             made.save(self.conn)
 529             todo.add_child(made)
 530         for process_id in processes_to_make_full:
 531             made = Todo.create_with_children(self.conn, process_id, todo.date)
 532             todo.add_child(made)
 533         effort = self._form_data.get_str('effort', ignore_strict=True)
 534         todo.effort = float(effort) if effort else None
 535         todo.set_conditions(self.conn,
 536                             self._form_data.get_all_int('condition'))
 537         todo.set_blockers(self.conn, self._form_data.get_all_int('blocker'))
 538         todo.set_enables(self.conn, self._form_data.get_all_int('enables'))
 539         todo.set_disables(self.conn, self._form_data.get_all_int('disables'))
 540         todo.is_done = len(self._form_data.get_all_str('done')) > 0
 541         todo.calendarize = len(self._form_data.get_all_str('calendarize')) > 0
 542         todo.comment = self._form_data.get_str('comment', ignore_strict=True)
 543         todo.save(self.conn)
 544         for condition in todo.enables:
 545             condition.save(self.conn)
 546         for condition in todo.disables:
 547             condition.save(self.conn)
 548         return f'/todo?id={todo.id_}'
 549
 550     def do_POST_process_descriptions(self) -> str:
 551         """Update history timestamps for Process.description."""
 552         return self._change_versioned_timestamps(Process, 'description')
 553
 554     def do_POST_process_efforts(self) -> str:
 555         """Update history timestamps for Process.effort."""
 556         return self._change_versioned_timestamps(Process, 'effort')
 557
 558     def do_POST_process_titles(self) -> str:
 559         """Update history timestamps for Process.title."""
 560         return self._change_versioned_timestamps(Process, 'title')
 561
 562     def do_POST_process(self) -> str:
 563         """Update or insert Process of ?id= and fields defined in postvars."""
 564         # pylint: disable=too-many-branches
 565         id_ = self._params.get_int_or_none('id')
 566         for _ in self._form_data.get_all_str('delete'):
 567             process = Process.by_id(self.conn, id_)
 568             process.remove(self.conn)
 569             return '/processes'
 570         process = Process.by_id(self.conn, id_, create=True)
 571         process.title.set(self._form_data.get_str('title'))
 572         process.description.set(self._form_data.get_str('description'))
 573         process.effort.set(self._form_data.get_float('effort'))
 574         process.set_conditions(self.conn,
 575                                self._form_data.get_all_int('condition'))
 576         process.set_blockers(self.conn, self._form_data.get_all_int('blocker'))
 577         process.set_enables(self.conn, self._form_data.get_all_int('enables'))
 578         process.set_disables(self.conn,
 579                              self._form_data.get_all_int('disables'))
 580         process.calendarize = self._form_data.get_all_str('calendarize') != []
 581         process.save(self.conn)
 582         assert isinstance(process.id_, int)
 583         steps: list[ProcessStep] = []
 584         for step_id in self._form_data.get_all_int('keep_step'):
 585             if step_id not in self._form_data.get_all_int('steps'):
 586                 raise BadFormatException('trying to keep unknown step')
 587         for step_id in self._form_data.get_all_int('steps'):
 588             if step_id not in self._form_data.get_all_int('keep_step'):
 589                 continue
 590             step_process_id = self._form_data.get_int(
 591                     f'step_{step_id}_process_id')
 592             parent_id = self._form_data.get_int_or_none(
 593                     f'step_{step_id}_parent_id')
 594             steps += [ProcessStep(step_id, process.id_, step_process_id,
 595                                   parent_id)]
 596         for step_id in self._form_data.get_all_int('steps'):
 597             for step_process_id in self._form_data.get_all_int(
 598                     f'new_step_to_{step_id}'):
 599                 steps += [ProcessStep(None, process.id_, step_process_id,
 600                                       step_id)]
 601         new_step_title = None
 602         for step_identifier in self._form_data.get_all_str('new_top_step'):
 603             try:
 604                 step_process_id = int(step_identifier)
 605                 steps += [ProcessStep(None, process.id_, step_process_id,
 606                                       None)]
 607             except ValueError:
 608                 new_step_title = step_identifier
 609         process.uncache()
 610         process.set_steps(self.conn, steps)
 611         process.set_step_suppressions(self.conn,
 612                                       self._form_data.
 613                                       get_all_int('suppresses'))
 614         process.save(self.conn)
 615         owners_to_set = []
 616         new_owner_title = None
 617         for owner_identifier in self._form_data.get_all_str('step_of'):
 618             try:
 619                 owners_to_set += [int(owner_identifier)]
 620             except ValueError:
 621                 new_owner_title = owner_identifier
 622         process.set_owners(self.conn, owners_to_set)
 623         params = f'id={process.id_}'
 624         if new_step_title:
 625             title_b64_encoded = b64encode(new_step_title.encode()).decode()
 626             params = f'step_to={process.id_}&title_b64={title_b64_encoded}'
 627         elif new_owner_title:
 628             title_b64_encoded = b64encode(new_owner_title.encode()).decode()
 629             params = f'has_step={process.id_}&title_b64={title_b64_encoded}'
 630         return f'/process?{params}'
 631
 632     def do_POST_condition_descriptions(self) -> str:
 633         """Update history timestamps for Condition.description."""
 634         return self._change_versioned_timestamps(Condition, 'description')
 635
 636     def do_POST_condition_titles(self) -> str:
 637         """Update history timestamps for Condition.title."""
 638         return self._change_versioned_timestamps(Condition, 'title')
 639
 640     def do_POST_condition(self) -> str:
 641         """Update/insert Condition of ?id= and fields defined in postvars."""
 642         id_ = self._params.get_int_or_none('id')
 643         for _ in self._form_data.get_all_str('delete'):
 644             condition = Condition.by_id(self.conn, id_)
 645             condition.remove(self.conn)
 646             return '/conditions'
 647         condition = Condition.by_id(self.conn, id_, create=True)
 648         condition.is_active = self._form_data.get_all_str('is_active') != []
 649         condition.title.set(self._form_data.get_str('title'))
 650         condition.description.set(self._form_data.get_str('description'))
 651         condition.save(self.conn)
 652         return f'/condition?id={condition.id_}'