[ADD/WIP] Start basic work on getting room lists.

I think I should actually update by "catching" events on-the-fly instead
of doing this.

src/Room.c

@@ -126,6 +126,7 @@ RoomPopulate(Room *room, User *user, RoomCreateRequest *req, ServerPart s)
     event = RoomEventCreate(sender_str, "m.room.create", "", content);
     JsonFree(RoomEventSend(room, event));
     JsonFree(event);
+    UserAddJoin(user, room->id);
 
     /* m.room.member */
     content = HashMapCreate();
@@ -2024,6 +2025,8 @@ RoomSendInvite(User *sender, bool direct, char *user, Room *room)
     JsonFree(RoomEventSend(room, event));
     JsonFree(event);
 
+    /* TODO: Send to "local" invite list if user is local. */
+
     ConfigUnlock(&conf);
     Free(senderStr);
 }
@@ -2181,7 +2184,10 @@ RoomJoin(Room *room, User *user)
     pdu = RoomEventSend(room, event);
 
     ret = !!pdu;
-    /* TODO: Note down *somewhere* that the user joined. */
+    if (ret)
+    {
+        UserAddJoin(user, room->id);
+    }
 end:
     UserIdFree(userId);
     JsonFree(event);

src/Routes.c

@@ -82,6 +82,8 @@ RouterBuild(void)
 
     R("/_matrix/client/v3/join/(.*)", RouteJoinRoomAlias);
 
+    R("/_matrix/client/v3/joined_rooms", RouteJoinedRooms);
+
     R("/_matrix/client/v3/createRoom", RouteCreateRoom);
 
     R("/_matrix/client/v3/directory/room/(.*)", RouteAliasDirectory);

src/Routes/RouteJoinedRooms.c

@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2022-2024 Jordan Bancino <@jordan:bancino.net> with
+ * other valuable contributors. See CONTRIBUTORS.txt for the full list.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <Routes.h>
+
+
+#include <Cytoplasm/HashMap.h>
+#include <Cytoplasm/Memory.h>
+#include <Cytoplasm/Json.h>
+#include <Cytoplasm/Str.h>
+
+#include <User.h>
+#include <Room.h>
+#include <string.h>
+
+#include <Schema/Filter.h>
+
+
+ROUTE_IMPL(RouteJoinedRooms, path, argp)
+{
+    RouteArgs *args = argp;
+    Db *db = args->matrixArgs->db;
+
+    HashMap *response = NULL;
+
+    User *user = NULL;
+    char *token = NULL;
+
+    Array *rawRoomList;
+    Array *roomIds;
+
+    char *err;
+
+    size_t i;
+
+    if (HttpRequestMethodGet(args->context) != HTTP_GET)
+    {
+        err = "Unknown request method.";
+        HttpResponseStatus(args->context, HTTP_BAD_REQUEST);
+        response = MatrixErrorCreate(M_UNRECOGNIZED, err);
+        goto finish;
+    }
+
+    response = MatrixGetAccessToken(args->context, &token);
+    if (response)
+    {
+        goto finish;
+    }
+
+    user = UserAuthenticate(db, token);
+    if (!user)
+    {
+        HttpResponseStatus(args->context, HTTP_UNAUTHORIZED);
+        response = MatrixErrorCreate(M_UNKNOWN_TOKEN, NULL);
+        goto finish;
+    }
+    rawRoomList = UserListJoins(user);
+    roomIds = ArrayCreate();
+    for (i = 0; i < ArraySize(rawRoomList); i++)
+    {
+        ArrayAdd(roomIds, JsonValueString(ArrayGet(rawRoomList, i)));
+    }
+    UserFreeList(rawRoomList);
+    
+    response = HashMapCreate();
+    HashMapSet(response, "joined_rooms", JsonValueArray(roomIds));
+
+    (void) path;
+finish:
+    UserUnlock(user);
+    return response;
+}

src/User.c

@@ -28,6 +28,7 @@
 #include <Cytoplasm/Str.h>
 #include <Cytoplasm/Sha.h>
 #include <Cytoplasm/Json.h>
+#include <Cytoplasm/Log.h>
 
 #include <Parser.h>
 
@@ -232,6 +233,9 @@ UserCreate(Db * db, char *name, char *password)
     HashMapSet(json, "createdOn", JsonValueInteger(ts));
     HashMapSet(json, "deactivated", JsonValueBoolean(false));
 
+    HashMapSet(json, "invites", JsonValueObject(HashMapCreate()));
+    HashMapSet(json, "joins", JsonValueObject(HashMapCreate()));
+
     return user;
 }
 
@@ -984,3 +988,129 @@ UserSetTransaction(User *user, char *transaction, char *path, HashMap *resp)
         3, "transactions", path, transaction
     ));
 }
+void
+UserAddInvite(User *user, char *roomId)
+{
+    HashMap *data;
+    HashMap *invites;
+    if (!user || !roomId)
+    {
+        return;
+    }
+
+    data = DbJson(user->ref);
+    invites = JsonValueAsObject(HashMapGet(data, "invites"));
+    
+    JsonFree(HashMapSet(invites, roomId, JsonValueNull()));
+}
+
+void
+UserRemoveInvite(User *user, char *roomId)
+{
+    HashMap *data;
+    HashMap *invites;
+    if (!user || !roomId)
+    {
+        return;
+    }
+
+    data = DbJson(user->ref);
+    invites = JsonValueAsObject(HashMapGet(data, "invites"));
+    
+    JsonFree(HashMapDelete(invites, roomId));
+}
+Array *
+UserListInvites(User *user)
+{
+    Array *arr;
+    HashMap *data;
+    HashMap *invites;
+
+    size_t i;
+    if (!user)
+    {
+        return NULL;
+    }
+    data = DbJson(user->ref);
+    invites = JsonValueAsObject(HashMapGet(data, "invites"));
+    arr = HashMapKeys(invites);
+
+    for (i = 0; i < ArraySize(arr); i++)
+    {
+        ArraySet(arr, i, StrDuplicate(ArrayGet(arr, i)));
+    }
+
+    return arr;
+}
+
+void
+UserAddJoin(User *user, char *roomId)
+{
+    HashMap *data;
+    HashMap *joins;
+    if (!user || !roomId)
+    {
+        return;
+    }
+
+    data = DbJson(user->ref);
+    joins = JsonValueAsObject(HashMapGet(data, "joins"));
+    
+    JsonFree(HashMapSet(joins, roomId, JsonValueNull()));
+}
+
+void
+UserRemoveJoin(User *user, char *roomId)
+{
+    HashMap *data;
+    HashMap *joins;
+    if (!user || !roomId)
+    {
+        return;
+    }
+
+    data = DbJson(user->ref);
+    joins = JsonValueAsObject(HashMapGet(data, "joins"));
+    
+    JsonFree(HashMapDelete(joins, roomId));
+}
+Array *
+UserListJoins(User *user)
+{
+    Array *arr;
+    HashMap *data;
+    HashMap *joins;
+
+    size_t i;
+    if (!user)
+    {
+        return NULL;
+    }
+    data = DbJson(user->ref);
+    joins = JsonValueAsObject(HashMapGet(data, "joins"));
+    arr = HashMapKeys(joins);
+
+    for (i = 0; i < ArraySize(arr); i++)
+    {
+        ArraySet(arr, i, StrDuplicate(ArrayGet(arr, i)));
+    }
+
+    return arr;
+}
+
+void
+UserFreeList(Array *arr)
+{
+    size_t i;
+    if (!arr)
+    {
+        return;
+    }
+
+    for (i = 0; i < ArraySize(arr); i++)
+    {
+        Free(ArrayGet(arr, i));
+    }
+
+    ArrayFree(arr);
+}

src/include/Routes.h

@@ -103,6 +103,7 @@ ROUTE(RouteCreateRoom);
 ROUTE(RouteFetchEvent);
 ROUTE(RouteSendEvent);
 ROUTE(RouteJoinRoom);
+ROUTE(RouteJoinedRooms);
 ROUTE(RouteJoinRoomAlias);
 
 ROUTE(RouteAliasDirectory);

src/include/User.h

@@ -314,6 +314,48 @@ extern HashMap * UserGetTransaction(User *, char *, char *);
  */
 extern void UserSetTransaction(User *, char *, char *, HashMap *);
 
+/**
+ * Puts a room (indexed by room ID) in a user's invite list.
+ */
+extern void UserAddInvite(User *, char *);
+
+/**
+ * Removes a room from the user's invite list.
+ */
+extern void UserRemoveInvite(User *, char *);
+
+/**
+ * Lists all the rooms a user is invited to into an array of 
+ * strings(room ID) to be freed by 
+ * .Fn UserFreeInvites .
+ */
+extern Array * UserListInvites(User *);
+
+/**
+ * Puts a room (indexed by room ID) in a user's join list.
+ */
+extern void UserAddJoin(User *, char *);
+
+/**
+ * Removes a room from the user's join list.
+ */
+extern void UserRemoveJoin(User *, char *);
+
+/**
+ * Lists all the rooms a user has joined into an array of 
+ * strings(room ID) to be freed by 
+ * .Fn UserFreeJoins .
+ */
+extern Array * UserListJoins(User *);
+
+/**
+ * Frees a join/invite list as created by
+ * .Fn UserListJoins 
+ * or
+ * .Fn UserListInvites .
+ */
+extern void UserFreeList(Array *);
+
 /**
  * Frees the user's common ID and the memory allocated for it.
  */