[ADD/WIP] Basic alias system.

NOTE: I *need* to write an Alias API(and also manage clashes proper.)

src/Room.c

@@ -78,48 +78,15 @@ GenerateRoomId(ServerPart s)
 
     return string;
 }
-
-Room *
-RoomCreate(Db * db, User *user, RoomCreateRequest * req, ServerPart s)
+static void
+RoomPopulate(Room *room, User *user, RoomCreateRequest *req, ServerPart s)
 {
-    Room *room;
-    char *version_string, *full_creator;
-    int version_num = 1;
-    HashMap *json;
-    HashMap *event, *content;
     CommonID sender;
     char *sender_str, *key;
-    JsonValue *val;
-    HashMap *override;
+    HashMap *content, *event, *override;
     Array *initial_states;
+    JsonValue *val;
     size_t i;
-    if (!db || !req || !user)
-    {
-        return NULL;
-    }
-    
-    version_string = req->room_version;
-    if (version_string)
-    {
-        /* TODO: Eventually use something else than room version 1 by 
-         * default, and maybe add a config parameter. */
-        version_num = atoi(version_string);
-        version_num = version_num == 0 ? 1 : version_num;
-    }
-    room = Malloc(sizeof(Room));
-    room->db = db;
-    room->creator.hostname = s.hostname ? StrDuplicate(s.hostname) : NULL;
-    room->creator.port = s.port ? StrDuplicate(s.port) : NULL;
-    room->id = GenerateRoomId(s);
-    room->version = version_num;
-
-    room->state_ref = DbCreate(db, 3, "rooms", room->id, "state");
-    room->leaves_ref = DbCreate(db, 3, "rooms", room->id, "leaves");
-    json = DbJson(room->leaves_ref);
-    JsonSet(json, JsonValueArray(ArrayCreate()), 1, "leaves");
-    full_creator = ParserRecomposeServerPart(room->creator);
-    JsonSet(json, JsonValueString(full_creator), 1, "creator");
-    Free(full_creator);
 
     sender.sigil = '@';
     sender.local = UserGetName(user);
@@ -164,8 +131,21 @@ RoomCreate(Db * db, User *user, RoomCreateRequest * req, ServerPart s)
     JsonFree(RoomEventSend(room, event));
     JsonFree(event);
 
-    /* TODO: Events set by the preset */
-    /* TODO: Events in initial_state */
+    /* Presets */
+    switch (req->preset)
+    {
+        case ROOM_CREATE_PUBLIC:
+            /* TODO */
+            break;
+        case ROOM_CREATE_TRUSTED:
+            /* TODO */
+            break;
+        case ROOM_CREATE_PRIVATE:
+            /* TODO */
+            break;
+    }
+
+    /* User-provided initial states */
     initial_states = req->initial_state;
     for (i = 0; i < ArraySize(initial_states); i++)
     {
@@ -181,6 +161,8 @@ RoomCreate(Db * db, User *user, RoomCreateRequest * req, ServerPart s)
         JsonFree(RoomEventSend(room, rseObject));
         JsonFree(rseObject);
     }
+
+    /* Name and topic. */
     if (req->name)
     {
         content = HashMapCreate();
@@ -197,10 +179,112 @@ RoomCreate(Db * db, User *user, RoomCreateRequest * req, ServerPart s)
         JsonFree(RoomEventSend(room, event));
         JsonFree(event);
     }
+
+    /* Custom alias */
+    if (req->room_alias_name)
+    {
+        DbRef *aliasesRef = DbLock(room->db, 1, "aliases");
+        HashMap *aliasesJson;
+        if (!aliasesRef)
+        {
+            aliasesRef = DbCreate(room->db, 1, "aliases");
+        }
+
+        if (aliasesRef)
+        {
+            CommonID full;
+            char *fullStr, *serverStr;
+            HashMap *alias, *idObject;
+            Array *servers, *ids;
+
+            full.sigil = '#';
+            full.local = req->room_alias_name;
+            full.server = s;
+            
+            aliasesJson = DbJson(aliasesRef);
+            fullStr = ParserRecomposeCommonID(full);
+
+            servers = ArrayCreate();
+            serverStr = ParserRecomposeServerPart(room->creator);
+            ArrayAdd(servers, JsonValueString(serverStr));
+            Free(serverStr);
+
+            alias = HashMapCreate();
+            HashMapSet(alias, "createdBy", JsonValueString(sender_str));
+            HashMapSet(alias, "id", JsonValueString(room->id));
+            HashMapSet(alias, "servers", JsonValueArray(servers));
+
+            JsonValueFree(JsonSet(
+                aliasesJson, JsonValueObject(alias), 2,
+                "aliases", fullStr));
+            if (!(idObject = 
+                JsonValueAsObject(JsonGet(aliasesJson, 2, "id", room->id))))
+            {
+                ids = ArrayCreate();
+                idObject = HashMapCreate();
+                HashMapSet(idObject, "aliases", JsonValueArray(ids));
+                JsonSet(
+                    aliasesJson, 
+                    JsonValueObject(idObject), 
+                    2, "id", room->id);
+            }
+            ids = JsonValueAsArray(HashMapGet(idObject, "aliases"));
+            ArrayAdd(ids, JsonValueString(fullStr));
+
+            content = HashMapCreate();
+            JsonSet(content, JsonValueString(fullStr), 1, "alias");
+            event = RoomEventCreate(
+                sender_str, 
+                "m.room.canonical_alias", "", content);
+            JsonFree(RoomEventSend(room, event));
+            JsonFree(event);
+
+            Free(fullStr);
+            DbUnlock(room->db, aliasesRef);
+        }
+    }
     /* TODO: The rest of the events mandated by the specification on 
-     * POST /createRoom. */
+     * POST /createRoom, and error management. */
 
     Free(sender_str);
+}
+Room *
+RoomCreate(Db * db, User *user, RoomCreateRequest * req, ServerPart s)
+{
+    Room *room;
+    char *version_string, *full_creator;
+    int version_num = 1;
+    HashMap *json;
+    if (!db || !req || !user)
+    {
+        return NULL;
+    }
+    
+    version_string = req->room_version;
+    if (version_string)
+    {
+        /* TODO: Eventually use something else than room version 1 by 
+         * default, and maybe add a config parameter. */
+        version_num = atoi(version_string);
+        version_num = version_num == 0 ? 1 : version_num;
+    }
+    room = Malloc(sizeof(Room));
+    room->db = db;
+    room->creator.hostname = s.hostname ? StrDuplicate(s.hostname) : NULL;
+    room->creator.port = s.port ? StrDuplicate(s.port) : NULL;
+    room->id = GenerateRoomId(s);
+    room->version = version_num;
+
+    room->state_ref = DbCreate(db, 3, "rooms", room->id, "state");
+    room->leaves_ref = DbCreate(db, 3, "rooms", room->id, "leaves");
+    json = DbJson(room->leaves_ref);
+    JsonSet(json, JsonValueArray(ArrayCreate()), 1, "leaves");
+    full_creator = ParserRecomposeServerPart(room->creator);
+    JsonSet(json, JsonValueString(full_creator), 1, "creator");
+    Free(full_creator);
+
+    RoomPopulate(room, user, req, s);
+
     return room;
 }
 
@@ -499,9 +583,8 @@ PopulateEventV1(Room * room, HashMap * event, PduV1 * pdu, ServerPart serv)
     pdu->room_id = StrDuplicate(room->id);
     pdu->signatures = HashMapCreate();
     pdu->depth = RoomGetDepth(room) + 1; /* TODO: Clamp this value. */
-    pdu->depth = 
-        pdu->depth >= (int64_t) UINT64_MAX ? 
-            (int64_t) UINT64_MAX : pdu->depth;
+    pdu->depth = pdu->depth >= (int64_t) INT64_MAX ? 
+                    (int64_t) INT64_MAX : pdu->depth;
 
     /* Create a random event ID for this PDU.
      * TODO: Optionally verify whenever it's already used, but that