forked from Telodendria/Telodendria
239 lines
6.8 KiB
C
239 lines
6.8 KiB
C
/*
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* Copyright (C) 2022-2024 Jordan Bancino <@jordan:bancino.net> with
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* other valuable contributors. See CONTRIBUTORS.txt for the full list.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef TELODENDRIA_ROOM_H
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#define TELODENDRIA_ROOM_H
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/***
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* @Nm Room
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* @Nd API for creating and manipulating Rooms.
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* @Dd July 6 2023
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* @Xr Event
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*
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* The core component of the Matrix specification is the Room,
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* which holds a directed acyclic graph (DAG) of Events.
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* .Nm
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* provides a way of working with persistent rooms.
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*/
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#include <Cytoplasm/HashMap.h>
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#include <Cytoplasm/Db.h>
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#include <Schema/RoomCreateRequest.h>
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#include <Schema/PduV1.h>
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#include <Parser.h>
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#include <User.h>
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/**
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* The functions in this API operate on an opaque structure.
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*/
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typedef struct Room Room;
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#include <State.h>
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/**
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* Create a new room in the given database using the given
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* RoomCreateRequest.
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*/
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extern Room * RoomCreate(Db *, User *, RoomCreateRequest *, ServerPart);
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/**
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* Lock the existing room in the specified database,
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* identified by the specified ID, which is expected
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* to include the server name and room ID sigil.
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* .Pp
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* this function returns NULL if there was an error
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* locking the room, such as the room not existing.
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*/
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extern Room * RoomLock(Db *, char *);
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/**
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* Returns the database structure a room is tied to.
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*/
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extern Db * RoomGetDB(Room *);
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/**
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* Unlock a room handle, returning it to the database.
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* This function returns the result of calling
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* .Fn DbUnlock() on the internal room reference.
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*/
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extern int RoomUnlock(Room *);
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/**
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* Get the full ID of the specified room, including
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* the sigil and server name. This function returns
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* NULL if there was an error getting the room ID.
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*/
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extern char * RoomIdGet(Room *);
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/**
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* Get the numeric room version for the specified
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* room. The room version is determined by and stored
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* in the m.room.create event as a string, but since this
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* is expected to be a relatively frequent operation,
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* the integer representation is stored in the room
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* information so it can be accessed without having
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* to lock the room state and m.room.create event.
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*/
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extern int RoomVersionGet(Room *);
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/**
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* Resolve the state for the latest events in the
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* room. This function uses the appropriate state
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* resolution algorithm to compute the latest state,
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* which is used to select auth events on incoming
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* client events.
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*/
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extern State * RoomStateGet(Room *);
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/**
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* Resolves the room's state before a specific point,
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* (with the event hashmap taking priority),
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* like
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* .Fn RoomStateGet .
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*/
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extern State * RoomStateGetID(Room *, char *);
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/**
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* Get a list of the most recent events in the
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* room. When ingressing client events, these events
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* should be copied to the incoming event's prev_events.
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* Note that this function returns an array of actual
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* events themselves, not just IDs, even though that's
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* what's stored in the database.
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*/
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extern Array * RoomPrevEventsGet(Room *);
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/**
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* Set the list of most recent events in the room.
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* When ingressing client events, this list will be
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* manipulated. Unfortunately it can't be manipulated
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* in place with the current design, so this function
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* is responsible for copying the modified list into
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* place.
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*/
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extern int RoomPrevEventsSet(Room *, Array *);
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/**
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* Send a single event to the specified room. This
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* function can take either a client event or a
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* federation PDU. Depending on which is supplied,
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* the appropriate logic is applied. Client events
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* are converted into their federation format for
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* the room version, which includes setting the
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* prev_events and auth_events fields correctly.
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*/
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extern HashMap * RoomEventSend(Room *, HashMap *);
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/**
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* Sends an invite to a user in a room, and tries
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* to notify such user of it.
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*/
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extern void RoomSendInvite(User *, bool, char *, Room *);
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/**
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* Fetch a single event's PDU in a room into an
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* hashmap, given an event ID, from the database
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* if possible, or otherwise fetched from a remote
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* homeserver participating in the room.
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*/
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extern HashMap * RoomEventFetch(Room *, char *);
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/**
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* Strips all the fields not required in a
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* Matrix ClientEvent from a PDU object.
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*/
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extern HashMap * RoomEventClientify(HashMap *);
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/**
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* Verifies whenever an event(as a PDUv1) is
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* authorised by a room.
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*/
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extern bool RoomAuthoriseEventV1(Room *, PduV1, State *);
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/**
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* Gets the room's creator as a ServerPart. This value should
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* not be freed, as it lives alongside the room itself
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*/
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extern ServerPart RoomGetCreator(Room *);
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/**
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* Puts a PDUv1 into the event list, while updating the leaf
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* list.
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*/
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extern bool RoomAddEventV1(Room *, PduV1);
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/**
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* Creates a barebones JSON object to be sent to
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* .Fn RoomEventFetch .
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*/
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extern HashMap * RoomEventCreate(char *, char *, char *, HashMap *);
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/**
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* Computes an approximation of the PDU depth by looking at
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* the leaves stored in the room data.
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*/
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extern uint64_t RoomGetDepth(Room *);
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/**
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* Tries to find an alias from room alias to an ID stored
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* on the heap, or NULL if it does not exist.
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*/
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extern char * RoomResolveAlias(Db *, char *);
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/**
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* Tries to resolve a list of aliases from a room ID into
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* an array of strings stored on the heap.
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*/
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extern Array * RoomReverseAlias(Db *, char *);
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/**
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* Frees the array returned by
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* .Fn RoomReverseAlias .
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*/
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extern void RoomFreeReverse(Array *);
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/**
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* Checks whenever a room contains a specific user.
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*/
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extern bool RoomContainsUser(Room *, char *);
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/**
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* Checks whenever an user can join a specific room,
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* given it's permissions.
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*/
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extern bool RoomCanJoin(Room *, char *);
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/**
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* Makes a local user join a room, and returns true if
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* the room was joined.
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*/
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extern bool RoomJoin(Room *, User *);
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/**
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* Adds or overwrites a room alias.
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*/
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extern void RoomAddAlias(Db *, char *, char *, char *, char *);
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#endif /* TELODENDRIA_ROOM_H */
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