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Refactor request handler delete or retrieving items on POST.
[plomtask] / plomtask / http.py
index 55473ea85410f840a6bbfe32e41ba245b1a85202..18b77a6f0a97ccea4718261f69e23be7ab9d3866 100644 (file)
@@ -11,13 +11,12 @@ from os.path import split as path_split
 from jinja2 import Environment as JinjaEnv, FileSystemLoader as JinjaFSLoader
 from plomtask.dating import date_in_n_days
 from plomtask.days import Day
-from plomtask.exceptions import HandledException, BadFormatException, \
-        NotFoundException
+from plomtask.exceptions import (HandledException, BadFormatException,
+                                 NotFoundException)
 from plomtask.db import DatabaseConnection, DatabaseFile
 from plomtask.processes import Process, ProcessStep, ProcessStepsNode
 from plomtask.conditions import Condition
 from plomtask.todos import Todo
-from plomtask.db import BaseModel
 
 TEMPLATES_DIR = 'templates'
 
@@ -42,15 +41,25 @@ class TaskServer(HTTPServer):
     def ctx_to_json(ctx: dict[str, object]) -> str:
         """Render ctx into JSON string."""
         def walk_ctx(node: object) -> Any:
-            if isinstance(node, BaseModel):
+            if hasattr(node, 'as_dict_into_reference'):
+                if hasattr(node, 'id_') and node.id_ is not None:
+                    return node.as_dict_into_reference(library)
+            if hasattr(node, 'as_dict'):
                 return node.as_dict
             if isinstance(node, (list, tuple)):
                 return [walk_ctx(x) for x in node]
+            if isinstance(node, dict):
+                d = {}
+                for k, v in node.items():
+                    d[k] = walk_ctx(v)
+                return d
             if isinstance(node, HandledException):
                 return str(node)
             return node
+        library: dict[str, dict[str | int, object]] = {}
         for k, v in ctx.items():
             ctx[k] = walk_ctx(v)
+        ctx['_library'] = library
         return json_dumps(ctx)
 
     def render(self, ctx: dict[str, object], tmpl_name: str = '') -> str:
@@ -143,7 +152,7 @@ class TaskHandler(BaseHTTPRequestHandler):
                    tmpl_name: str,
                    code: int = 200
                    ) -> None:
-        """Send HTML as proper HTTP response."""
+        """Send ctx as proper HTTP response."""
         body = self.server.render(ctx, tmpl_name)
         self.send_response(code)
         for header_tuple in self.server.headers:
@@ -244,7 +253,7 @@ class TaskHandler(BaseHTTPRequestHandler):
     def do_GET_day(self) -> dict[str, object]:
         """Show single Day of ?date=."""
         date = self._params.get_str('date', date_in_n_days(0))
-        day = Day.by_id(self.conn, date, create=True)
+        day = Day.by_id_or_create(self.conn, date)
         make_type = self._params.get_str('make_type')
         conditions_present = []
         enablers_for = {}
@@ -335,7 +344,8 @@ class TaskHandler(BaseHTTPRequestHandler):
         adoptables: dict[int, list[Todo]] = {}
         any_adoptables = [Todo.by_id(self.conn, t.id_)
                           for t in Todo.by_date(self.conn, todo.date)
-                          if t != todo]
+                          if t.id_ is not None
+                          and t != todo]
         for id_ in collect_adoptables_keys(steps_todo_to_process):
             adoptables[id_] = [t for t in any_adoptables
                                if t.process.id_ == id_]
@@ -400,7 +410,7 @@ class TaskHandler(BaseHTTPRequestHandler):
     def do_GET_condition(self) -> dict[str, object]:
         """Show Condition of ?id=."""
         id_ = self._params.get_int_or_none('id')
-        c = Condition.by_id(self.conn, id_, create=True)
+        c = Condition.by_id_or_create(self.conn, id_)
         ps = Process.all(self.conn)
         return {'condition': c, 'is_new': c.id_ is None,
                 'enabled_processes': [p for p in ps if c in p.conditions],
@@ -410,20 +420,20 @@ class TaskHandler(BaseHTTPRequestHandler):
 
     def do_GET_condition_titles(self) -> dict[str, object]:
         """Show title history of Condition of ?id=."""
-        id_ = self._params.get_int_or_none('id')
+        id_ = self._params.get_int('id')
         condition = Condition.by_id(self.conn, id_)
         return {'condition': condition}
 
     def do_GET_condition_descriptions(self) -> dict[str, object]:
         """Show description historys of Condition of ?id=."""
-        id_ = self._params.get_int_or_none('id')
+        id_ = self._params.get_int('id')
         condition = Condition.by_id(self.conn, id_)
         return {'condition': condition}
 
     def do_GET_process(self) -> dict[str, object]:
         """Show Process of ?id=."""
         id_ = self._params.get_int_or_none('id')
-        process = Process.by_id(self.conn, id_, create=True)
+        process = Process.by_id_or_create(self.conn, id_)
         title_64 = self._params.get_str('title_b64')
         if title_64:
             title = b64decode(title_64.encode()).decode()
@@ -443,19 +453,19 @@ class TaskHandler(BaseHTTPRequestHandler):
 
     def do_GET_process_titles(self) -> dict[str, object]:
         """Show title history of Process of ?id=."""
-        id_ = self._params.get_int_or_none('id')
+        id_ = self._params.get_int('id')
         process = Process.by_id(self.conn, id_)
         return {'process': process}
 
     def do_GET_process_descriptions(self) -> dict[str, object]:
         """Show description historys of Process of ?id=."""
-        id_ = self._params.get_int_or_none('id')
+        id_ = self._params.get_int('id')
         process = Process.by_id(self.conn, id_)
         return {'process': process}
 
     def do_GET_process_efforts(self) -> dict[str, object]:
         """Show default effort history of Process of ?id=."""
-        id_ = self._params.get_int_or_none('id')
+        id_ = self._params.get_int('id')
         process = Process.by_id(self.conn, id_)
         return {'process': process}
 
@@ -485,6 +495,32 @@ class TaskHandler(BaseHTTPRequestHandler):
 
     # POST handlers
 
+    @staticmethod
+    def _delete_or_post(target_class: Any, redir_target: str = '/'
+                        ) -> Callable[..., Callable[[TaskHandler], str]]:
+        def decorator(f: Callable[..., str]
+                      ) -> Callable[[TaskHandler], str]:
+            def wrapper(self: TaskHandler) -> str:
+                # pylint: disable=protected-access
+                # (because pylint here fails to detect the use of wrapper as a
+                # method to self with respective access privileges)
+                id_ = self._params.get_int_or_none('id')
+                for _ in self._form_data.get_all_str('delete'):
+                    if id_ is None:
+                        msg = 'trying to delete non-saved ' +\
+                                f'{target_class.__name__}'
+                        raise NotFoundException(msg)
+                    item = target_class.by_id(self.conn, id_)
+                    item.remove(self.conn)
+                    return redir_target
+                if target_class.can_create_by_id:
+                    item = target_class.by_id_or_create(self.conn, id_)
+                else:
+                    item = target_class.by_id(self.conn, id_)
+                return f(self, item)
+            return wrapper
+        return decorator
+
     def _change_versioned_timestamps(self, cls: Any, attr_name: str) -> str:
         """Update history timestamps for VersionedAttribute."""
         id_ = self._params.get_int_or_none('id')
@@ -495,13 +531,12 @@ class TaskHandler(BaseHTTPRequestHandler):
             if old[19:] != v:
                 attr.reset_timestamp(old, f'{v}.0')
         attr.save(self.conn)
-        cls_name = cls.__name__.lower()
-        return f'/{cls_name}_{attr_name}s?id={item.id_}'
+        return f'/{cls.name_lowercase()}_{attr_name}s?id={item.id_}'
 
     def do_POST_day(self) -> str:
         """Update or insert Day of date and Todos mapped to it."""
         date = self._params.get_str('date')
-        day = Day.by_id(self.conn, date, create=True)
+        day = Day.by_id_or_create(self.conn, date)
         day.comment = self._form_data.get_str('day_comment')
         day.save(self.conn)
         make_type = self._form_data.get_str('make_type')
@@ -525,16 +560,9 @@ class TaskHandler(BaseHTTPRequestHandler):
             todo.save(self.conn)
         return f'/day?date={date}&make_type={make_type}'
 
-    def do_POST_todo(self) -> str:
+    @_delete_or_post(Todo, '/')
+    def do_POST_todo(self, todo: Todo) -> str:
         """Update Todo and its children."""
-        # pylint: disable=too-many-locals
-        # pylint: disable=too-many-branches
-        id_ = self._params.get_int('id')
-        for _ in self._form_data.get_all_str('delete'):
-            todo = Todo .by_id(self.conn, id_)
-            todo.remove(self.conn)
-            return '/'
-        todo = Todo.by_id(self.conn, id_)
         adopted_child_ids = self._form_data.get_all_int('adopt')
         processes_to_make_full = self._form_data.get_all_int('make_full')
         processes_to_make_empty = self._form_data.get_all_int('make_empty')
@@ -570,8 +598,8 @@ class TaskHandler(BaseHTTPRequestHandler):
         effort = self._form_data.get_str('effort', ignore_strict=True)
         todo.effort = float(effort) if effort else None
         todo.set_conditions(self.conn,
-                            self._form_data.get_all_int('condition'))
-        todo.set_blockers(self.conn, self._form_data.get_all_int('blocker'))
+                            self._form_data.get_all_int('conditions'))
+        todo.set_blockers(self.conn, self._form_data.get_all_int('blockers'))
         todo.set_enables(self.conn, self._form_data.get_all_int('enables'))
         todo.set_disables(self.conn, self._form_data.get_all_int('disables'))
         todo.is_done = len(self._form_data.get_all_str('done')) > 0
@@ -592,21 +620,16 @@ class TaskHandler(BaseHTTPRequestHandler):
         """Update history timestamps for Process.title."""
         return self._change_versioned_timestamps(Process, 'title')
 
-    def do_POST_process(self) -> str:
+    @_delete_or_post(Process, '/processes')
+    def do_POST_process(self, process: Process) -> str:
         """Update or insert Process of ?id= and fields defined in postvars."""
-        # pylint: disable=too-many-branches
-        id_ = self._params.get_int_or_none('id')
-        for _ in self._form_data.get_all_str('delete'):
-            process = Process.by_id(self.conn, id_)
-            process.remove(self.conn)
-            return '/processes'
-        process = Process.by_id(self.conn, id_, create=True)
         process.title.set(self._form_data.get_str('title'))
         process.description.set(self._form_data.get_str('description'))
         process.effort.set(self._form_data.get_float('effort'))
         process.set_conditions(self.conn,
-                               self._form_data.get_all_int('condition'))
-        process.set_blockers(self.conn, self._form_data.get_all_int('blocker'))
+                               self._form_data.get_all_int('conditions'))
+        process.set_blockers(self.conn,
+                             self._form_data.get_all_int('blockers'))
         process.set_enables(self.conn, self._form_data.get_all_int('enables'))
         process.set_disables(self.conn,
                              self._form_data.get_all_int('disables'))
@@ -669,15 +692,10 @@ class TaskHandler(BaseHTTPRequestHandler):
         """Update history timestamps for Condition.title."""
         return self._change_versioned_timestamps(Condition, 'title')
 
-    def do_POST_condition(self) -> str:
+    @_delete_or_post(Condition, '/conditions')
+    def do_POST_condition(self, condition: Condition) -> str:
         """Update/insert Condition of ?id= and fields defined in postvars."""
-        id_ = self._params.get_int_or_none('id')
-        for _ in self._form_data.get_all_str('delete'):
-            condition = Condition.by_id(self.conn, id_)
-            condition.remove(self.conn)
-            return '/conditions'
-        condition = Condition.by_id(self.conn, id_, create=True)
-        condition.is_active = self._form_data.get_all_str('is_active') != []
+        condition.is_active = self._form_data.get_str('is_active') == 'True'
         condition.title.set(self._form_data.get_str('title'))
         condition.description.set(self._form_data.get_str('description'))
         condition.save(self.conn)