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

   1 """Web server stuff."""
   2 from typing import Any
   3 from http.server import BaseHTTPRequestHandler
   4 from http.server import HTTPServer
   5 from urllib.parse import urlparse, parse_qs
   6 from os.path import split as path_split
   7 from jinja2 import Environment as JinjaEnv, FileSystemLoader as JinjaFSLoader
   8 from plomtask.days import Day, todays_date
   9 from plomtask.exceptions import HandledException, BadFormatException, \
  10         NotFoundException
  11 from plomtask.db import DatabaseConnection, DatabaseFile
  12 from plomtask.processes import Process
  13 from plomtask.conditions import Condition
  14 from plomtask.todos import Todo
  15
  16 TEMPLATES_DIR = 'templates'
  17
  18
  19 class TaskServer(HTTPServer):
  20     """Variant of HTTPServer that knows .jinja as Jinja Environment."""
  21
  22     def __init__(self, db_file: DatabaseFile,
  23                  *args: Any, **kwargs: Any) -> None:
  24         super().__init__(*args, **kwargs)
  25         self.db = db_file
  26         self.jinja = JinjaEnv(loader=JinjaFSLoader(TEMPLATES_DIR))
  27
  28
  29 class InputsParser:
  30     """Wrapper for validating and retrieving dict-like HTTP inputs."""
  31
  32     def __init__(self, dict_: dict[str, list[str]],
  33                  strictness: bool = True) -> None:
  34         self.inputs = dict_
  35         self.strict = strictness
  36
  37     def get_str(self, key: str, default: str = '',
  38                 ignore_strict: bool = False) -> str:
  39         """Retrieve single/first string value of key, or default."""
  40         if key not in self.inputs.keys() or 0 == len(self.inputs[key]):
  41             if self.strict and not ignore_strict:
  42                 raise BadFormatException(f'no value found for key {key}')
  43             return default
  44         return self.inputs[key][0]
  45
  46     def get_int(self, key: str) -> int:
  47         """Retrieve single/first value of key as int, error if empty."""
  48         val = self.get_int_or_none(key)
  49         if val is None:
  50             raise BadFormatException(f'unexpected empty value for: {key}')
  51         return val
  52
  53     def get_int_or_none(self, key: str) -> int | None:
  54         """Retrieve single/first value of key as int, return None if empty."""
  55         val = self.get_str(key, ignore_strict=True)
  56         if val == '':
  57             return None
  58         try:
  59             return int(val)
  60         except ValueError as e:
  61             msg = f'cannot int form field value for key {key}: {val}'
  62             raise BadFormatException(msg) from e
  63
  64     def get_float(self, key: str) -> float:
  65         """Retrieve float value of key from self.postvars."""
  66         val = self.get_str(key)
  67         try:
  68             return float(val)
  69         except ValueError as e:
  70             msg = f'cannot float form field value for key {key}: {val}'
  71             raise BadFormatException(msg) from e
  72
  73     def get_all_str(self, key: str) -> list[str]:
  74         """Retrieve list of string values at key."""
  75         if key not in self.inputs.keys():
  76             return []
  77         return self.inputs[key]
  78
  79     def get_all_int(self, key: str) -> list[int]:
  80         """Retrieve list of int values at key."""
  81         all_str = self.get_all_str(key)
  82         try:
  83             return [int(s) for s in all_str if len(s) > 0]
  84         except ValueError as e:
  85             msg = f'cannot int a form field value for key {key} in: {all_str}'
  86             raise BadFormatException(msg) from e
  87
  88
  89 class TaskHandler(BaseHTTPRequestHandler):
  90     """Handles single HTTP request."""
  91     server: TaskServer
  92
  93     def do_GET(self) -> None:
  94         """Handle any GET request."""
  95         try:
  96             self._init_handling()
  97             if hasattr(self, f'do_GET_{self.site}'):
  98                 template = f'{self.site}.html'
  99                 ctx = getattr(self, f'do_GET_{self.site}')()
 100                 html = self.server.jinja.get_template(template).render(**ctx)
 101                 self._send_html(html)
 102             elif '' == self.site:
 103                 self._redirect('/day')
 104             else:
 105                 raise NotFoundException(f'Unknown page: /{self.site}')
 106         except HandledException as error:
 107             self._send_msg(error, code=error.http_code)
 108         finally:
 109             self.conn.close()
 110
 111     def do_GET_calendar(self) -> dict[str, object]:
 112         """Show Days from ?start= to ?end=."""
 113         start = self.params.get_str('start')
 114         end = self.params.get_str('end')
 115         days = Day.all(self.conn, date_range=(start, end), fill_gaps=True)
 116         for day in days:
 117             day.collect_calendarized_todos(self.conn)
 118         return {'start': start, 'end': end, 'days': days}
 119
 120     def do_GET_day(self) -> dict[str, object]:
 121         """Show single Day of ?date=."""
 122         date = self.params.get_str('date', todays_date())
 123         todays_todos = Todo.by_date(self.conn, date)
 124         conditions_present = []
 125         enablers_for = {}
 126         disablers_for = {}
 127         for todo in todays_todos:
 128             for condition in todo.conditions + todo.blockers:
 129                 if condition not in conditions_present:
 130                     conditions_present += [condition]
 131                     enablers_for[condition.id_] = [p for p in
 132                                                    Process.all(self.conn)
 133                                                    if condition in p.enables]
 134                     disablers_for[condition.id_] = [p for p in
 135                                                     Process.all(self.conn)
 136                                                     if condition in p.disables]
 137         seen_todos: set[int] = set()
 138         top_nodes = [t.get_step_tree(seen_todos)
 139                      for t in todays_todos if not t.parents]
 140         return {'day': Day.by_id(self.conn, date, create=True),
 141                 'top_nodes': top_nodes,
 142                 'enablers_for': enablers_for,
 143                 'disablers_for': disablers_for,
 144                 'conditions_present': conditions_present,
 145                 'processes': Process.all(self.conn)}
 146
 147     def do_GET_todo(self) -> dict[str, object]:
 148         """Show single Todo of ?id=."""
 149         id_ = self.params.get_int('id')
 150         todo = Todo.by_id(self.conn, id_)
 151         return {'todo': todo,
 152                 'todo_candidates': Todo.by_date(self.conn, todo.date),
 153                 'condition_candidates': Condition.all(self.conn)}
 154
 155     def do_GET_conditions(self) -> dict[str, object]:
 156         """Show all Conditions."""
 157         conditions = Condition.all(self.conn)
 158         sort_by = self.params.get_str('sort_by')
 159         if sort_by == 'is_active':
 160             conditions.sort(key=lambda c: c.is_active)
 161         elif sort_by == '-is_active':
 162             conditions.sort(key=lambda c: c.is_active, reverse=True)
 163         elif sort_by == '-title':
 164             conditions.sort(key=lambda c: c.title.newest, reverse=True)
 165         else:
 166             conditions.sort(key=lambda c: c.title.newest)
 167         return {'conditions': conditions, 'sort_by': sort_by}
 168
 169     def do_GET_condition(self) -> dict[str, object]:
 170         """Show Condition of ?id=."""
 171         id_ = self.params.get_int_or_none('id')
 172         return {'condition': Condition.by_id(self.conn, id_, create=True)}
 173
 174     def do_GET_condition_titles(self) -> dict[str, object]:
 175         """Show title history of Condition of ?id=."""
 176         id_ = self.params.get_int_or_none('id')
 177         condition = Condition.by_id(self.conn, id_)
 178         return {'condition': condition}
 179
 180     def do_GET_condition_descriptions(self) -> dict[str, object]:
 181         """Show description historys of Condition of ?id=."""
 182         id_ = self.params.get_int_or_none('id')
 183         condition = Condition.by_id(self.conn, id_)
 184         return {'condition': condition}
 185
 186     def do_GET_process(self) -> dict[str, object]:
 187         """Show Process of ?id=."""
 188         id_ = self.params.get_int_or_none('id')
 189         process = Process.by_id(self.conn, id_, create=True)
 190         return {'process': process,
 191                 'steps': process.get_steps(self.conn),
 192                 'owners': process.used_as_step_by(self.conn),
 193                 'step_candidates': Process.all(self.conn),
 194                 'condition_candidates': Condition.all(self.conn)}
 195
 196     def do_GET_process_titles(self) -> dict[str, object]:
 197         """Show title history of Process of ?id=."""
 198         id_ = self.params.get_int_or_none('id')
 199         process = Process.by_id(self.conn, id_)
 200         return {'process': process}
 201
 202     def do_GET_process_descriptions(self) -> dict[str, object]:
 203         """Show description historys of Process of ?id=."""
 204         id_ = self.params.get_int_or_none('id')
 205         process = Process.by_id(self.conn, id_)
 206         return {'process': process}
 207
 208     def do_GET_process_efforts(self) -> dict[str, object]:
 209         """Show default effort history of Process of ?id=."""
 210         id_ = self.params.get_int_or_none('id')
 211         process = Process.by_id(self.conn, id_)
 212         return {'process': process}
 213
 214     def do_GET_processes(self) -> dict[str, object]:
 215         """Show all Processes."""
 216         processes = Process.all(self.conn)
 217         sort_by = self.params.get_str('sort_by')
 218         if sort_by == 'steps':
 219             processes.sort(key=lambda c: len(c.explicit_steps))
 220         elif sort_by == '-steps':
 221             processes.sort(key=lambda c: len(c.explicit_steps), reverse=True)
 222         elif sort_by == '-title':
 223             processes.sort(key=lambda c: c.title.newest, reverse=True)
 224         else:
 225             processes.sort(key=lambda c: c.title.newest)
 226         return {'processes': processes, 'sort_by': sort_by}
 227
 228     def do_POST(self) -> None:
 229         """Handle any POST request."""
 230         # pylint: disable=attribute-defined-outside-init
 231         try:
 232             self._init_handling()
 233             length = int(self.headers['content-length'])
 234             postvars = parse_qs(self.rfile.read(length).decode(),
 235                                 keep_blank_values=True, strict_parsing=True)
 236             self.form_data = InputsParser(postvars)
 237             if hasattr(self, f'do_POST_{self.site}'):
 238                 redir_target = getattr(self, f'do_POST_{self.site}')()
 239                 self.conn.commit()
 240             else:
 241                 msg = f'Page not known as POST target: /{self.site}'
 242                 raise NotFoundException(msg)
 243             self._redirect(redir_target)
 244         except HandledException as error:
 245             self._send_msg(error, code=error.http_code)
 246         finally:
 247             self.conn.close()
 248
 249     def do_POST_day(self) -> str:
 250         """Update or insert Day of date and Todos mapped to it."""
 251         date = self.params.get_str('date')
 252         day = Day.by_id(self.conn, date, create=True)
 253         day.comment = self.form_data.get_str('day_comment')
 254         day.save(self.conn)
 255         new_todos = []
 256         for process_id in self.form_data.get_all_int('new_todo'):
 257             process = Process.by_id(self.conn, process_id)
 258             todo = Todo(None, process, False, day.date)
 259             todo.save(self.conn)
 260             new_todos += [todo]
 261         adopted = True
 262         while adopted:
 263             adopted = False
 264             existing_todos = Todo.by_date(self.conn, date)
 265             for todo in new_todos:
 266                 if todo.adopt_from(existing_todos):
 267                     adopted = True
 268                 todo.make_missing_children(self.conn)
 269                 todo.save(self.conn)
 270         done_ids = self.form_data.get_all_int('done')
 271         comments = self.form_data.get_all_str('comment')
 272         efforts = self.form_data.get_all_str('effort')
 273         for i, todo_id in enumerate(self.form_data.get_all_int('todo_id')):
 274             todo = Todo.by_id(self.conn, todo_id)
 275             todo.is_done = todo_id in done_ids
 276             if len(comments) > 0:
 277                 todo.comment = comments[i]
 278             if len(efforts) > 0:
 279                 todo.effort = float(efforts[i]) if efforts[i] else None
 280             todo.save(self.conn)
 281             for condition in todo.enables:
 282                 condition.save(self.conn)
 283             for condition in todo.disables:
 284                 condition.save(self.conn)
 285         return f'/day?date={date}'
 286
 287     def do_POST_todo(self) -> str:
 288         """Update Todo and its children."""
 289         id_ = self.params.get_int('id')
 290         for _ in self.form_data.get_all_str('delete'):
 291             todo = Todo .by_id(self.conn, id_)
 292             todo.remove(self.conn)
 293             return '/'
 294         todo = Todo.by_id(self.conn, id_)
 295         adopted_child_ids = self.form_data.get_all_int('adopt')
 296         for child in todo.children:
 297             if child.id_ not in adopted_child_ids:
 298                 assert isinstance(child.id_, int)
 299                 child = Todo.by_id(self.conn, child.id_)
 300                 todo.remove_child(child)
 301         for child_id in adopted_child_ids:
 302             if child_id in [c.id_ for c in todo.children]:
 303                 continue
 304             child = Todo.by_id(self.conn, child_id)
 305             todo.add_child(child)
 306         effort = self.form_data.get_str('effort', ignore_strict=True)
 307         todo.effort = float(effort) if effort else None
 308         todo.set_conditions(self.conn, self.form_data.get_all_int('condition'))
 309         todo.set_blockers(self.conn, self.form_data.get_all_int('blocker'))
 310         todo.set_enables(self.conn, self.form_data.get_all_int('enables'))
 311         todo.set_disables(self.conn, self.form_data.get_all_int('disables'))
 312         todo.is_done = len(self.form_data.get_all_str('done')) > 0
 313         todo.calendarize = len(self.form_data.get_all_str('calendarize')) > 0
 314         todo.comment = self.form_data.get_str('comment', ignore_strict=True)
 315         todo.save(self.conn)
 316         for condition in todo.enables:
 317             condition.save(self.conn)
 318         for condition in todo.disables:
 319             condition.save(self.conn)
 320         return f'/todo?id={todo.id_}'
 321
 322     def do_POST_process(self) -> str:
 323         """Update or insert Process of ?id= and fields defined in postvars."""
 324         id_ = self.params.get_int_or_none('id')
 325         for _ in self.form_data.get_all_str('delete'):
 326             process = Process.by_id(self.conn, id_)
 327             process.remove(self.conn)
 328             return '/processes'
 329         process = Process.by_id(self.conn, id_, create=True)
 330         process.title.set(self.form_data.get_str('title'))
 331         process.description.set(self.form_data.get_str('description'))
 332         process.effort.set(self.form_data.get_float('effort'))
 333         process.set_conditions(self.conn,
 334                                self.form_data.get_all_int('condition'))
 335         process.set_blockers(self.conn, self.form_data.get_all_int('blocker'))
 336         process.set_enables(self.conn, self.form_data.get_all_int('enables'))
 337         process.set_disables(self.conn, self.form_data.get_all_int('disables'))
 338         process.calendarize = self.form_data.get_all_str('calendarize') != []
 339         process.save(self.conn)
 340         process.explicit_steps = []
 341         steps: list[tuple[int | None, int, int | None]] = []
 342         for step_id in self.form_data.get_all_int('steps'):
 343             for step_process_id in self.form_data.get_all_int(
 344                     f'new_step_to_{step_id}'):
 345                 steps += [(None, step_process_id, step_id)]
 346             if step_id not in self.form_data.get_all_int('keep_step'):
 347                 continue
 348             step_process_id = self.form_data.get_int(
 349                     f'step_{step_id}_process_id')
 350             parent_id = self.form_data.get_int_or_none(
 351                     f'step_{step_id}_parent_id')
 352             steps += [(step_id, step_process_id, parent_id)]
 353         for step_process_id in self.form_data.get_all_int('new_top_step'):
 354             steps += [(None, step_process_id, None)]
 355         process.set_steps(self.conn, steps)
 356         process.save(self.conn)
 357         return f'/process?id={process.id_}'
 358
 359     def do_POST_condition(self) -> str:
 360         """Update/insert Condition of ?id= and fields defined in postvars."""
 361         id_ = self.params.get_int_or_none('id')
 362         for _ in self.form_data.get_all_str('delete'):
 363             condition = Condition.by_id(self.conn, id_)
 364             condition.remove(self.conn)
 365             return '/conditions'
 366         condition = Condition.by_id(self.conn, id_, create=True)
 367         condition.is_active = self.form_data.get_all_str('is_active') != []
 368         condition.title.set(self.form_data.get_str('title'))
 369         condition.description.set(self.form_data.get_str('description'))
 370         condition.save(self.conn)
 371         return f'/condition?id={condition.id_}'
 372
 373     def _init_handling(self) -> None:
 374         # pylint: disable=attribute-defined-outside-init
 375         self.conn = DatabaseConnection(self.server.db)
 376         parsed_url = urlparse(self.path)
 377         self.site = path_split(parsed_url.path)[1]
 378         params = parse_qs(parsed_url.query, strict_parsing=True)
 379         self.params = InputsParser(params, False)
 380
 381     def _redirect(self, target: str) -> None:
 382         self.send_response(302)
 383         self.send_header('Location', target)
 384         self.end_headers()
 385
 386     def _send_html(self, html: str, code: int = 200) -> None:
 387         """Send HTML as proper HTTP response."""
 388         self.send_response(code)
 389         self.end_headers()
 390         self.wfile.write(bytes(html, 'utf-8'))
 391
 392     def _send_msg(self, msg: Exception, code: int = 400) -> None:
 393         """Send message in HTML formatting as HTTP response."""
 394         html = self.server.jinja.get_template('msg.html').render(msg=msg)
 395         self._send_html(html, code)