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