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         return {'start': start, 'end': end, 'days': days}
 117
 118     def do_GET_day(self) -> dict[str, object]:
 119         """Show single Day of ?date=."""
 120         date = self.params.get_str('date', todays_date())
 121         todays_todos = Todo.by_date(self.conn, date)
 122         conditions_present = []
 123         enablers_for = {}
 124         for todo in todays_todos:
 125             for condition in todo.conditions:
 126                 if condition not in conditions_present:
 127                     conditions_present += [condition]
 128                     enablers_for[condition.id_] = [p for p in
 129                                                    Process.all(self.conn)
 130                                                    if condition in p.enables]
 131         seen_todos: set[int] = set()
 132         top_nodes = [t.get_step_tree(seen_todos)
 133                      for t in todays_todos if not t.parents]
 134         return {'day': Day.by_id(self.conn, date, create=True),
 135                 'top_nodes': top_nodes,
 136                 'enablers_for': enablers_for,
 137                 'conditions_present': conditions_present,
 138                 'processes': Process.all(self.conn)}
 139
 140     def do_GET_todo(self) -> dict[str, object]:
 141         """Show single Todo of ?id=."""
 142         id_ = self.params.get_int('id')
 143         todo = Todo.by_id(self.conn, id_)
 144         return {'todo': todo,
 145                 'todo_candidates': Todo.by_date(self.conn, todo.date),
 146                 'condition_candidates': Condition.all(self.conn)}
 147
 148     def do_GET_conditions(self) -> dict[str, object]:
 149         """Show all Conditions."""
 150         conditions = Condition.all(self.conn)
 151         sort_by = self.params.get_str('sort_by')
 152         if sort_by == 'is_active':
 153             conditions.sort(key=lambda c: c.is_active)
 154         elif sort_by == '-is_active':
 155             conditions.sort(key=lambda c: c.is_active, reverse=True)
 156         elif sort_by == '-title':
 157             conditions.sort(key=lambda c: c.title.newest, reverse=True)
 158         else:
 159             conditions.sort(key=lambda c: c.title.newest)
 160         return {'conditions': conditions, 'sort_by': sort_by}
 161
 162     def do_GET_condition(self) -> dict[str, object]:
 163         """Show Condition of ?id=."""
 164         id_ = self.params.get_int_or_none('id')
 165         return {'condition': Condition.by_id(self.conn, id_, create=True)}
 166
 167     def do_GET_condition_titles(self) -> dict[str, object]:
 168         """Show title history of Condition of ?id=."""
 169         id_ = self.params.get_int_or_none('id')
 170         condition = Condition.by_id(self.conn, id_)
 171         return {'condition': condition}
 172
 173     def do_GET_condition_descriptions(self) -> dict[str, object]:
 174         """Show description historys of Condition of ?id=."""
 175         id_ = self.params.get_int_or_none('id')
 176         condition = Condition.by_id(self.conn, id_)
 177         return {'condition': condition}
 178
 179     def do_GET_process(self) -> dict[str, object]:
 180         """Show Process of ?id=."""
 181         id_ = self.params.get_int_or_none('id')
 182         process = Process.by_id(self.conn, id_, create=True)
 183         return {'process': process,
 184                 'steps': process.get_steps(self.conn),
 185                 'owners': process.used_as_step_by(self.conn),
 186                 'step_candidates': Process.all(self.conn),
 187                 'condition_candidates': Condition.all(self.conn)}
 188
 189     def do_GET_process_titles(self) -> dict[str, object]:
 190         """Show title history of Process of ?id=."""
 191         id_ = self.params.get_int_or_none('id')
 192         process = Process.by_id(self.conn, id_)
 193         return {'process': process}
 194
 195     def do_GET_process_descriptions(self) -> dict[str, object]:
 196         """Show description historys of Process of ?id=."""
 197         id_ = self.params.get_int_or_none('id')
 198         process = Process.by_id(self.conn, id_)
 199         return {'process': process}
 200
 201     def do_GET_process_efforts(self) -> dict[str, object]:
 202         """Show default effort history of Process of ?id=."""
 203         id_ = self.params.get_int_or_none('id')
 204         process = Process.by_id(self.conn, id_)
 205         return {'process': process}
 206
 207     def do_GET_processes(self) -> dict[str, object]:
 208         """Show all Processes."""
 209         processes = Process.all(self.conn)
 210         sort_by = self.params.get_str('sort_by')
 211         if sort_by == 'steps':
 212             processes.sort(key=lambda c: len(c.explicit_steps))
 213         elif sort_by == '-steps':
 214             processes.sort(key=lambda c: len(c.explicit_steps), reverse=True)
 215         elif sort_by == '-title':
 216             processes.sort(key=lambda c: c.title.newest, reverse=True)
 217         else:
 218             processes.sort(key=lambda c: c.title.newest)
 219         return {'processes': processes, 'sort_by': sort_by}
 220
 221     def do_POST(self) -> None:
 222         """Handle any POST request."""
 223         # pylint: disable=attribute-defined-outside-init
 224         try:
 225             self._init_handling()
 226             length = int(self.headers['content-length'])
 227             postvars = parse_qs(self.rfile.read(length).decode(),
 228                                 keep_blank_values=True, strict_parsing=True)
 229             self.form_data = InputsParser(postvars)
 230             if hasattr(self, f'do_POST_{self.site}'):
 231                 redir_target = getattr(self, f'do_POST_{self.site}')()
 232                 self.conn.commit()
 233             else:
 234                 msg = f'Page not known as POST target: /{self.site}'
 235                 raise NotFoundException(msg)
 236             self._redirect(redir_target)
 237         except HandledException as error:
 238             self._send_msg(error, code=error.http_code)
 239         finally:
 240             self.conn.close()
 241
 242     def do_POST_day(self) -> str:
 243         """Update or insert Day of date and Todos mapped to it."""
 244         date = self.params.get_str('date')
 245         day = Day.by_id(self.conn, date, create=True)
 246         day.comment = self.form_data.get_str('day_comment')
 247         day.save(self.conn)
 248         new_todos = []
 249         for process_id in self.form_data.get_all_int('new_todo'):
 250             process = Process.by_id(self.conn, process_id)
 251             todo = Todo(None, process, False, day.date)
 252             todo.save(self.conn)
 253             new_todos += [todo]
 254         adopted = True
 255         while adopted:
 256             adopted = False
 257             existing_todos = Todo.by_date(self.conn, date)
 258             for todo in new_todos:
 259                 if todo.adopt_from(existing_todos):
 260                     adopted = True
 261                 todo.make_missing_children(self.conn)
 262                 todo.save(self.conn)
 263         done_ids = self.form_data.get_all_int('done')
 264         comments = self.form_data.get_all_str('comment')
 265         for i, todo_id in enumerate(self.form_data.get_all_int('todo_id')):
 266             todo = Todo.by_id(self.conn, todo_id)
 267             todo.is_done = todo_id in done_ids
 268             if len(comments) > 0:
 269                 todo.comment = comments[i]
 270             todo.save(self.conn)
 271             for condition in todo.enables:
 272                 condition.save(self.conn)
 273             for condition in todo.disables:
 274                 condition.save(self.conn)
 275         return f'/day?date={date}'
 276
 277     def do_POST_todo(self) -> str:
 278         """Update Todo and its children."""
 279         id_ = self.params.get_int('id')
 280         for _ in self.form_data.get_all_str('delete'):
 281             todo = Todo .by_id(self.conn, id_)
 282             todo.remove(self.conn)
 283             return '/'
 284         todo = Todo.by_id(self.conn, id_)
 285         adopted_child_ids = self.form_data.get_all_int('adopt')
 286         for child in todo.children:
 287             if child.id_ not in adopted_child_ids:
 288                 assert isinstance(child.id_, int)
 289                 child = Todo.by_id(self.conn, child.id_)
 290                 todo.remove_child(child)
 291         for child_id in adopted_child_ids:
 292             if child_id in [c.id_ for c in todo.children]:
 293                 continue
 294             child = Todo.by_id(self.conn, child_id)
 295             todo.add_child(child)
 296         todo.set_conditions(self.conn, self.form_data.get_all_int('condition'))
 297         todo.set_enables(self.conn, self.form_data.get_all_int('enables'))
 298         todo.set_disables(self.conn, self.form_data.get_all_int('disables'))
 299         todo.is_done = len(self.form_data.get_all_str('done')) > 0
 300         todo.comment = self.form_data.get_str('comment', ignore_strict=True)
 301         todo.save(self.conn)
 302         for condition in todo.enables:
 303             condition.save(self.conn)
 304         for condition in todo.disables:
 305             condition.save(self.conn)
 306         return f'/todo?id={todo.id_}'
 307
 308     def do_POST_process(self) -> str:
 309         """Update or insert Process of ?id= and fields defined in postvars."""
 310         id_ = self.params.get_int_or_none('id')
 311         for _ in self.form_data.get_all_str('delete'):
 312             process = Process.by_id(self.conn, id_)
 313             process.remove(self.conn)
 314             return '/processes'
 315         process = Process.by_id(self.conn, id_, create=True)
 316         process.title.set(self.form_data.get_str('title'))
 317         process.description.set(self.form_data.get_str('description'))
 318         process.effort.set(self.form_data.get_float('effort'))
 319         process.set_conditions(self.conn,
 320                                self.form_data.get_all_int('condition'))
 321         process.set_enables(self.conn, self.form_data.get_all_int('enables'))
 322         process.set_disables(self.conn, self.form_data.get_all_int('disables'))
 323         process.save(self.conn)
 324         process.explicit_steps = []
 325         steps: list[tuple[int | None, int, int | None]] = []
 326         for step_id in self.form_data.get_all_int('steps'):
 327             for step_process_id in self.form_data.get_all_int(
 328                     f'new_step_to_{step_id}'):
 329                 steps += [(None, step_process_id, step_id)]
 330             if step_id not in self.form_data.get_all_int('keep_step'):
 331                 continue
 332             step_process_id = self.form_data.get_int(
 333                     f'step_{step_id}_process_id')
 334             parent_id = self.form_data.get_int_or_none(
 335                     f'step_{step_id}_parent_id')
 336             steps += [(step_id, step_process_id, parent_id)]
 337         for step_process_id in self.form_data.get_all_int('new_top_step'):
 338             steps += [(None, step_process_id, None)]
 339         process.set_steps(self.conn, steps)
 340         process.save(self.conn)
 341         return f'/process?id={process.id_}'
 342
 343     def do_POST_condition(self) -> str:
 344         """Update/insert Condition of ?id= and fields defined in postvars."""
 345         id_ = self.params.get_int_or_none('id')
 346         for _ in self.form_data.get_all_str('delete'):
 347             condition = Condition.by_id(self.conn, id_)
 348             condition.remove(self.conn)
 349             return '/conditions'
 350         condition = Condition.by_id(self.conn, id_, create=True)
 351         condition.is_active = self.form_data.get_all_str('is_active') != []
 352         condition.title.set(self.form_data.get_str('title'))
 353         condition.description.set(self.form_data.get_str('description'))
 354         condition.save(self.conn)
 355         return f'/condition?id={condition.id_}'
 356
 357     def _init_handling(self) -> None:
 358         # pylint: disable=attribute-defined-outside-init
 359         self.conn = DatabaseConnection(self.server.db)
 360         parsed_url = urlparse(self.path)
 361         self.site = path_split(parsed_url.path)[1]
 362         params = parse_qs(parsed_url.query, strict_parsing=True)
 363         self.params = InputsParser(params, False)
 364
 365     def _redirect(self, target: str) -> None:
 366         self.send_response(302)
 367         self.send_header('Location', target)
 368         self.end_headers()
 369
 370     def _send_html(self, html: str, code: int = 200) -> None:
 371         """Send HTML as proper HTTP response."""
 372         self.send_response(code)
 373         self.end_headers()
 374         self.wfile.write(bytes(html, 'utf-8'))
 375
 376     def _send_msg(self, msg: Exception, code: int = 400) -> None:
 377         """Send message in HTML formatting as HTTP response."""
 378         html = self.server.jinja.get_template('msg.html').render(msg=msg)
 379         self._send_html(html, code)