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