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         total_effort = 0.0
 148         for todo in todays_todos:
 149             total_effort += todo.performed_effort
 150         conditions_present = []
 151         enablers_for = {}
 152         disablers_for = {}
 153         for todo in todays_todos:
 154             for condition in todo.conditions + todo.blockers:
 155                 if condition not in conditions_present:
 156                     conditions_present += [condition]
 157                     enablers_for[condition.id_] = [p for p in
 158                                                    Process.all(self.conn)
 159                                                    if condition in p.enables]
 160                     disablers_for[condition.id_] = [p for p in
 161                                                     Process.all(self.conn)
 162                                                     if condition in p.disables]
 163         seen_todos: set[int] = set()
 164         top_nodes = [t.get_step_tree(seen_todos)
 165                      for t in todays_todos if not t.parents]
 166         return {'day': Day.by_id(self.conn, date, create=True),
 167                 'total_effort': total_effort,
 168                 'top_nodes': top_nodes,
 169                 'enablers_for': enablers_for,
 170                 'disablers_for': disablers_for,
 171                 'conditions_present': conditions_present,
 172                 'processes': Process.all(self.conn)}
 173
 174     def do_GET_todo(self) -> dict[str, object]:
 175         """Show single Todo of ?id=."""
 176         id_ = self.params.get_int('id')
 177         todo = Todo.by_id(self.conn, id_)
 178         return {'todo': todo,
 179                 'process_candidates': Process.all(self.conn),
 180                 'todo_candidates': Todo.by_date(self.conn, todo.date),
 181                 'condition_candidates': Condition.all(self.conn)}
 182
 183     def do_GET_todos(self) -> dict[str, object]:
 184         """Show Todos from ?start= to ?end=, of ?process=, ?comment= pattern"""
 185         sort_by = self.params.get_str('sort_by')
 186         start = self.params.get_str('start')
 187         end = self.params.get_str('end')
 188         process_id = self.params.get_int_or_none('process_id')
 189         comment_pattern = self.params.get_str('comment_pattern')
 190         todos = []
 191         ret = Todo.by_date_range_with_limits(self.conn, (start, end))
 192         todos_by_date_range, start, end = ret
 193         todos = [t for t in todos_by_date_range
 194                  if comment_pattern in t.comment
 195                  and ((not process_id) or t.process.id_ == process_id)]
 196         if sort_by == 'doneness':
 197             todos.sort(key=lambda t: t.is_done)
 198         elif sort_by == '-doneness':
 199             todos.sort(key=lambda t: t.is_done, reverse=True)
 200         elif sort_by == 'title':
 201             todos.sort(key=lambda t: t.title_then)
 202         elif sort_by == '-title':
 203             todos.sort(key=lambda t: t.title_then, reverse=True)
 204         elif sort_by == 'comment':
 205             todos.sort(key=lambda t: t.comment)
 206         elif sort_by == '-comment':
 207             todos.sort(key=lambda t: t.comment, reverse=True)
 208         elif sort_by == '-date':
 209             todos.sort(key=lambda t: t.date, reverse=True)
 210         else:
 211             todos.sort(key=lambda t: t.date)
 212         return {'start': start, 'end': end, 'process_id': process_id,
 213                 'comment_pattern': comment_pattern, 'todos': todos,
 214                 'all_processes': Process.all(self.conn), 'sort_by': sort_by}
 215
 216     def do_GET_conditions(self) -> dict[str, object]:
 217         """Show all Conditions."""
 218         pattern = self.params.get_str('pattern')
 219         conditions = Condition.matching(self.conn, pattern)
 220         sort_by = self.params.get_str('sort_by')
 221         if sort_by == 'is_active':
 222             conditions.sort(key=lambda c: c.is_active)
 223         elif sort_by == '-is_active':
 224             conditions.sort(key=lambda c: c.is_active, reverse=True)
 225         elif sort_by == '-title':
 226             conditions.sort(key=lambda c: c.title.newest, reverse=True)
 227         else:
 228             conditions.sort(key=lambda c: c.title.newest)
 229         return {'conditions': conditions,
 230                 'sort_by': sort_by,
 231                 'pattern': pattern}
 232
 233     def do_GET_condition(self) -> dict[str, object]:
 234         """Show Condition of ?id=."""
 235         id_ = self.params.get_int_or_none('id')
 236         c = Condition.by_id(self.conn, id_, create=True)
 237         ps = Process.all(self.conn)
 238         return {'condition': c, 'is_new': c.id_ is None,
 239                 'enabled_processes': [p for p in ps if c in p.conditions],
 240                 'disabled_processes': [p for p in ps if c in p.blockers],
 241                 'enabling_processes': [p for p in ps if c in p.enables],
 242                 'disabling_processes': [p for p in ps if c in p.disables]}
 243
 244     def do_GET_condition_titles(self) -> dict[str, object]:
 245         """Show title history of Condition of ?id=."""
 246         id_ = self.params.get_int_or_none('id')
 247         condition = Condition.by_id(self.conn, id_)
 248         return {'condition': condition}
 249
 250     def do_GET_condition_descriptions(self) -> dict[str, object]:
 251         """Show description historys of Condition of ?id=."""
 252         id_ = self.params.get_int_or_none('id')
 253         condition = Condition.by_id(self.conn, id_)
 254         return {'condition': condition}
 255
 256     def do_GET_process(self) -> dict[str, object]:
 257         """Show Process of ?id=."""
 258         id_ = self.params.get_int_or_none('id')
 259         process = Process.by_id(self.conn, id_, create=True)
 260         title_64 = self.params.get_str('title_b64')
 261         if title_64:
 262             title = b64decode(title_64.encode()).decode()
 263             process.title.set(title)
 264         owners = process.used_as_step_by(self.conn)
 265         for step_id in self.params.get_all_int('step_to'):
 266             owners += [Process.by_id(self.conn, step_id)]
 267         preset_top_step = None
 268         for process_id in self.params.get_all_int('has_step'):
 269             preset_top_step = process_id
 270         return {'process': process, 'is_new': process.id_ is None,
 271                 'preset_top_step': preset_top_step,
 272                 'steps': process.get_steps(self.conn), 'owners': owners,
 273                 'n_todos': len(Todo.by_process_id(self.conn, process.id_)),
 274                 'process_candidates': Process.all(self.conn),
 275                 'condition_candidates': Condition.all(self.conn)}
 276
 277     def do_GET_process_titles(self) -> dict[str, object]:
 278         """Show title history of Process of ?id=."""
 279         id_ = self.params.get_int_or_none('id')
 280         process = Process.by_id(self.conn, id_)
 281         return {'process': process}
 282
 283     def do_GET_process_descriptions(self) -> dict[str, object]:
 284         """Show description historys of Process of ?id=."""
 285         id_ = self.params.get_int_or_none('id')
 286         process = Process.by_id(self.conn, id_)
 287         return {'process': process}
 288
 289     def do_GET_process_efforts(self) -> dict[str, object]:
 290         """Show default effort history of Process of ?id=."""
 291         id_ = self.params.get_int_or_none('id')
 292         process = Process.by_id(self.conn, id_)
 293         return {'process': process}
 294
 295     def do_GET_processes(self) -> dict[str, object]:
 296         """Show all Processes."""
 297         pattern = self.params.get_str('pattern')
 298         processes = Process.matching(self.conn, pattern)
 299         sort_by = self.params.get_str('sort_by')
 300         if sort_by == 'steps':
 301             processes.sort(key=lambda p: len(p.explicit_steps))
 302         elif sort_by == '-steps':
 303             processes.sort(key=lambda p: len(p.explicit_steps), reverse=True)
 304         elif sort_by == 'owners':
 305             processes.sort(key=lambda p: p.n_owners or 0)
 306         elif sort_by == '-owners':
 307             processes.sort(key=lambda p: p.n_owners or 0, reverse=True)
 308         elif sort_by == 'effort':
 309             processes.sort(key=lambda p: p.effort.newest)
 310         elif sort_by == '-effort':
 311             processes.sort(key=lambda p: p.effort.newest, reverse=True)
 312         elif sort_by == '-title':
 313             processes.sort(key=lambda p: p.title.newest, reverse=True)
 314         else:
 315             processes.sort(key=lambda p: p.title.newest)
 316         return {'processes': processes, 'sort_by': sort_by, 'pattern': pattern}
 317
 318     def do_POST(self) -> None:
 319         """Handle any POST request."""
 320         # pylint: disable=attribute-defined-outside-init
 321         try:
 322             self._init_handling()
 323             length = int(self.headers['content-length'])
 324             postvars = parse_qs(self.rfile.read(length).decode(),
 325                                 keep_blank_values=True, strict_parsing=True)
 326             self.form_data = InputsParser(postvars)
 327             if hasattr(self, f'do_POST_{self.site}'):
 328                 redir_target = getattr(self, f'do_POST_{self.site}')()
 329                 self.conn.commit()
 330             else:
 331                 msg = f'Page not known as POST target: /{self.site}'
 332                 raise NotFoundException(msg)
 333             self._redirect(redir_target)
 334         except HandledException as error:
 335             self._send_msg(error, code=error.http_code)
 336         finally:
 337             self.conn.close()
 338
 339     def do_POST_day(self) -> str:
 340         """Update or insert Day of date and Todos mapped to it."""
 341         date = self.params.get_str('date')
 342         day = Day.by_id(self.conn, date, create=True)
 343         day.comment = self.form_data.get_str('day_comment')
 344         day.save(self.conn)
 345         for process_id in sorted(self.form_data.get_all_int('new_todo')):
 346             Todo.create_with_children(self.conn, process_id, date)
 347         done_ids = self.form_data.get_all_int('done')
 348         comments = self.form_data.get_all_str('comment')
 349         efforts = self.form_data.get_all_str('effort')
 350         for i, todo_id in enumerate(self.form_data.get_all_int('todo_id')):
 351             todo = Todo.by_id(self.conn, todo_id)
 352             todo.is_done = todo_id in done_ids
 353             if len(comments) > 0:
 354                 todo.comment = comments[i]
 355             if len(efforts) > 0:
 356                 todo.effort = float(efforts[i]) if efforts[i] else None
 357             todo.save(self.conn)
 358             for condition in todo.enables:
 359                 condition.save(self.conn)
 360             for condition in todo.disables:
 361                 condition.save(self.conn)
 362         return f'/day?date={date}'
 363
 364     def do_POST_todo(self) -> str:
 365         """Update Todo and its children."""
 366         id_ = self.params.get_int('id')
 367         for _ in self.form_data.get_all_str('delete'):
 368             todo = Todo .by_id(self.conn, id_)
 369             todo.remove(self.conn)
 370             return '/'
 371         todo = Todo.by_id(self.conn, id_)
 372         adopted_child_ids = self.form_data.get_all_int('adopt')
 373         for child in todo.children:
 374             if child.id_ not in adopted_child_ids:
 375                 assert isinstance(child.id_, int)
 376                 child = Todo.by_id(self.conn, child.id_)
 377                 todo.remove_child(child)
 378         for child_id in adopted_child_ids:
 379             if child_id in [c.id_ for c in todo.children]:
 380                 continue
 381             child = Todo.by_id(self.conn, child_id)
 382             todo.add_child(child)
 383         for process_id in self.form_data.get_all_int('make'):
 384             made = Todo.create_with_children(self.conn, process_id, todo.date)
 385             todo.add_child(made)
 386         effort = self.form_data.get_str('effort', ignore_strict=True)
 387         todo.effort = float(effort) if effort else None
 388         todo.set_conditions(self.conn, self.form_data.get_all_int('condition'))
 389         todo.set_blockers(self.conn, self.form_data.get_all_int('blocker'))
 390         todo.set_enables(self.conn, self.form_data.get_all_int('enables'))
 391         todo.set_disables(self.conn, self.form_data.get_all_int('disables'))
 392         if len(self.form_data.get_all_str('done')) > 0 != todo.is_done:
 393             todo.is_done = len(self.form_data.get_all_str('done')) > 0
 394         todo.calendarize = len(self.form_data.get_all_str('calendarize')) > 0
 395         todo.comment = self.form_data.get_str('comment', ignore_strict=True)
 396         todo.save(self.conn)
 397         for condition in todo.enables:
 398             condition.save(self.conn)
 399         for condition in todo.disables:
 400             condition.save(self.conn)
 401         return f'/todo?id={todo.id_}'
 402
 403     def _do_POST_versioned_timestamps(self, cls: Any, attr_name: str) -> str:
 404         """Update history timestamps for VersionedAttribute."""
 405         id_ = self.params.get_int_or_none('id')
 406         item = cls.by_id(self.conn, id_)
 407         attr = getattr(item, attr_name)
 408         for k, v in self.form_data.get_first_strings_starting('at:').items():
 409             old = k[3:]
 410             if old[19:] != v:
 411                 attr.reset_timestamp(old, f'{v}.0')
 412         attr.save(self.conn)
 413         cls_name = cls.__name__.lower()
 414         return f'/{cls_name}_{attr_name}s?id={item.id_}'
 415
 416     def do_POST_process_descriptions(self) -> str:
 417         """Update history timestamps for Process.description."""
 418         return self._do_POST_versioned_timestamps(Process, 'description')
 419
 420     def do_POST_process_efforts(self) -> str:
 421         """Update history timestamps for Process.effort."""
 422         return self._do_POST_versioned_timestamps(Process, 'effort')
 423
 424     def do_POST_process_titles(self) -> str:
 425         """Update history timestamps for Process.title."""
 426         return self._do_POST_versioned_timestamps(Process, 'title')
 427
 428     def do_POST_process(self) -> str:
 429         """Update or insert Process of ?id= and fields defined in postvars."""
 430         # pylint: disable=too-many-branches
 431         id_ = self.params.get_int_or_none('id')
 432         for _ in self.form_data.get_all_str('delete'):
 433             process = Process.by_id(self.conn, id_)
 434             process.remove(self.conn)
 435             return '/processes'
 436         process = Process.by_id(self.conn, id_, create=True)
 437         process.title.set(self.form_data.get_str('title'))
 438         process.description.set(self.form_data.get_str('description'))
 439         process.effort.set(self.form_data.get_float('effort'))
 440         process.set_conditions(self.conn,
 441                                self.form_data.get_all_int('condition'))
 442         process.set_blockers(self.conn, self.form_data.get_all_int('blocker'))
 443         process.set_enables(self.conn, self.form_data.get_all_int('enables'))
 444         process.set_disables(self.conn, self.form_data.get_all_int('disables'))
 445         process.calendarize = self.form_data.get_all_str('calendarize') != []
 446         process.save(self.conn)
 447         assert isinstance(process.id_, int)
 448         steps: list[ProcessStep] = []
 449         for step_id in self.form_data.get_all_int('keep_step'):
 450             if step_id not in self.form_data.get_all_int('steps'):
 451                 raise BadFormatException('trying to keep unknown step')
 452         for step_id in self.form_data.get_all_int('steps'):
 453             if step_id not in self.form_data.get_all_int('keep_step'):
 454                 continue
 455             step_process_id = self.form_data.get_int(
 456                     f'step_{step_id}_process_id')
 457             parent_id = self.form_data.get_int_or_none(
 458                     f'step_{step_id}_parent_id')
 459             steps += [ProcessStep(step_id, process.id_, step_process_id,
 460                                   parent_id)]
 461         for step_id in self.form_data.get_all_int('steps'):
 462             for step_process_id in self.form_data.get_all_int(
 463                     f'new_step_to_{step_id}'):
 464                 steps += [ProcessStep(None, process.id_, step_process_id,
 465                                       step_id)]
 466         new_step_title = None
 467         for step_identifier in self.form_data.get_all_str('new_top_step'):
 468             try:
 469                 step_process_id = int(step_identifier)
 470                 steps += [ProcessStep(None, process.id_, step_process_id,
 471                                       None)]
 472             except ValueError:
 473                 new_step_title = step_identifier
 474         process.uncache()
 475         process.set_steps(self.conn, steps)
 476         process.set_step_suppressions(self.conn,
 477                                       self.form_data.get_all_int('suppresses'))
 478         process.save(self.conn)
 479         owners_to_set = []
 480         new_owner_title = None
 481         for owner_identifier in self.form_data.get_all_str('step_of'):
 482             try:
 483                 owners_to_set += [int(owner_identifier)]
 484             except ValueError:
 485                 new_owner_title = owner_identifier
 486         process.set_owners(self.conn, owners_to_set)
 487         params = f'id={process.id_}'
 488         if new_step_title:
 489             title_b64_encoded = b64encode(new_step_title.encode()).decode()
 490             params = f'step_to={process.id_}&title_b64={title_b64_encoded}'
 491         elif new_owner_title:
 492             title_b64_encoded = b64encode(new_owner_title.encode()).decode()
 493             params = f'has_step={process.id_}&title_b64={title_b64_encoded}'
 494         return f'/process?{params}'
 495
 496     def do_POST_condition_descriptions(self) -> str:
 497         """Update history timestamps for Condition.description."""
 498         return self._do_POST_versioned_timestamps(Condition, 'description')
 499
 500     def do_POST_condition_titles(self) -> str:
 501         """Update history timestamps for Condition.title."""
 502         return self._do_POST_versioned_timestamps(Condition, 'title')
 503
 504     def do_POST_condition(self) -> str:
 505         """Update/insert Condition of ?id= and fields defined in postvars."""
 506         id_ = self.params.get_int_or_none('id')
 507         for _ in self.form_data.get_all_str('delete'):
 508             condition = Condition.by_id(self.conn, id_)
 509             condition.remove(self.conn)
 510             return '/conditions'
 511         condition = Condition.by_id(self.conn, id_, create=True)
 512         condition.is_active = self.form_data.get_all_str('is_active') != []
 513         condition.title.set(self.form_data.get_str('title'))
 514         condition.description.set(self.form_data.get_str('description'))
 515         condition.save(self.conn)
 516         return f'/condition?id={condition.id_}'
 517
 518     def _init_handling(self) -> None:
 519         # pylint: disable=attribute-defined-outside-init
 520         self.conn = DatabaseConnection(self.server.db)
 521         parsed_url = urlparse(self.path)
 522         self.site = path_split(parsed_url.path)[1]
 523         params = parse_qs(parsed_url.query, strict_parsing=True)
 524         self.params = InputsParser(params, False)
 525
 526     def _redirect(self, target: str) -> None:
 527         self.send_response(302)
 528         self.send_header('Location', target)
 529         self.end_headers()
 530
 531     def _send_html(self, html: str, code: int = 200) -> None:
 532         """Send HTML as proper HTTP response."""
 533         self.send_response(code)
 534         self.end_headers()
 535         self.wfile.write(bytes(html, 'utf-8'))
 536
 537     def _send_msg(self, msg: Exception, code: int = 400) -> None:
 538         """Send message in HTML formatting as HTTP response."""
 539         html = self.server.jinja.get_template('msg.html').render(msg=msg)
 540         self._send_html(html, code)