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

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