[ADD/WIP] Float checks, /members, GETting state pieces

src/Matrix.c

@@ -509,3 +509,32 @@ MatrixSetJSON(HashMap *json, char *string, JsonValue *new)
     }
     return retVal;
 }
+bool 
+MatrixCheckFloats(HashMap *obj)
+{
+    size_t i;
+    char *key;
+    JsonValue *value;
+    if (!obj)
+    {
+        return false;
+    }
+
+    i = 0;
+    while (HashMapIterateReentrant(obj, &key, (void **) &value, &i))
+    {
+        if (JsonValueType(value) == JSON_FLOAT)
+        {
+            return false;
+        }
+        else if (JsonValueType(value) == JSON_OBJECT)
+        {
+            if (!MatrixCheckFloats(JsonValueAsObject(value)))
+            {
+                return false;
+            }
+        }
+    }
+    return true;
+}
+

src/Room.c

@@ -44,6 +44,7 @@
 #include <CanonicalJson.h>
 #include <Config.h>
 #include <Parser.h>
+#include <Matrix.h>
 #include <State.h>
 #include <Event.h>
 
@@ -239,6 +240,14 @@ RoomEventSend(Room * room, HashMap * event, char **errp)
     {
         return NULL;
     }
+    if (!MatrixCheckFloats(event))
+    {
+        if (errp)
+        {
+            *errp = "Event contains forbidden float value";
+        }
+        return NULL;
+    }
     if (room->version < 3)
     {
         /* Manage with PDUv1 */

src/Room/State.c

@@ -5,22 +5,6 @@
 #include <Config.h>
 #include <State.h>
 
-State *
-RoomStateGet(Room * room)
-{
-    HashMap *database_state;
-    if (!room)
-    {
-        return NULL;
-    }
-    
-    /* TODO: Consider caching the deserialised result, as doing that on a 
-     * large state would probably eat up a lot of time! */
-    
-    /* TODO: Update the cached state */
-    database_state = DbJson(room->state_ref);
-    return StateDeserialise(database_state);
-}
 State *
 RoomStateGetID(Room * room, char *event_id)
 {

src/Routes.c

@@ -85,6 +85,7 @@ RouterBuild(void)
     R("/_matrix/client/v3/rooms/(.*)/(join|leave)", RouteJoinRoom);
     R("/_matrix/client/v3/rooms/(.*)/(kick|ban|unban)", RouteKickRoom);
     R("/_matrix/client/v3/rooms/(.*)/messages", RouteMessages);
+    R("/_matrix/client/v3/rooms/(.*)/members", RouteMembers);
 
     R("/_matrix/client/v3/join/(.*)", RouteJoinRoomAlias);
 

src/Routes/RouteMembers.c

@@ -0,0 +1,175 @@
+/*
+ * 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 <Config.h>
+#include <User.h>
+#include <Room.h>
+
+#include <string.h>
+#include <stdlib.h>
+
+#include <Schema/Filter.h>
+
+static bool
+IsAllowed(HashMap *e, HashMap *params)
+{
+    char *not_membership = HashMapGet(params, "not_membership");
+    char *membership = HashMapGet(params, "membership");
+    char *e_membership = JsonValueAsString(JsonGet(e, 2, "content", "membership"));
+
+    return StrEquals(e_membership, membership) || !StrEquals(e_membership, not_membership);
+}
+
+ROUTE_IMPL(RouteMembers, path, argp)
+{
+    RouteArgs *args = argp;
+    Db *db = args->matrixArgs->db;
+
+    HashMap *params = HttpRequestParams(args->context);
+    HashMap *response = NULL;
+
+    User *user = NULL;
+    char *token = NULL;
+
+    char *entryType, *entryKey, *entry;
+    char *serverName = NULL, *sender = NULL;
+    char *roomId = ArrayGet(path, 0);
+    char *at = HashMapGet(params, "at");
+    char *atId = NULL;
+    CommonID *id = NULL;
+
+    Array *messages = NULL, *batch;
+
+    Room *room = NULL;
+    State *state = NULL;
+
+    char *err;
+
+    if (!roomId)
+    {
+        /* Should be impossible */
+        HttpResponseStatus(args->context, HTTP_INTERNAL_SERVER_ERROR);
+        return MatrixErrorCreate(M_UNKNOWN, NULL);
+    }
+    if (HttpRequestMethodGet(args->context) != HTTP_GET)
+    {
+        err = "Unknown request method.";
+        HttpResponseStatus(args->context, HTTP_BAD_REQUEST);
+        response = MatrixErrorCreate(M_UNRECOGNIZED, err);
+        goto finish;
+    }
+
+    serverName = ConfigGetServerName(db);
+    if (!serverName)
+    {
+        HttpResponseStatus(args->context, HTTP_INTERNAL_SERVER_ERROR);
+        response = MatrixErrorCreate(M_UNKNOWN, NULL);
+        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;
+    }
+    id = UserIdParse(UserGetName(user), serverName);
+    id->sigil = '@';
+    sender = ParserRecomposeCommonID(*id);
+
+    messages = UserGetEvents(user, at, roomId);
+    atId = ArrayGet(messages, 0);
+    room = RoomLock(db, roomId);
+    if (!RoomContainsUser(room, sender))
+    {
+        err = "User is not in the room.";
+        HttpResponseStatus(args->context, HTTP_UNAUTHORIZED);
+        response = MatrixErrorCreate(M_FORBIDDEN, err);
+        goto finish;
+    }
+
+    if (!atId)
+    {
+        state = StateCurrent(room);
+    }
+    else
+    {
+        state = RoomStateGetID(room, atId);
+    }
+
+    response = HashMapCreate();
+    batch = ArrayCreate();
+    HashMapSet(response, "batch", JsonValueArray(batch));
+    while (StateIterate(state, &entryType, &entryKey, (void **) &entry))
+    {
+        HashMap *event;
+        if (!StrEquals(entryType, "m.room.member"))
+        {
+            Free(entryType);
+            Free(entryKey);
+            continue;
+        }
+
+        if (IsAllowed((event = RoomEventFetch(room, entry)), params))
+        {
+            ArrayAdd(batch, JsonValueObject(event));
+            event = NULL;
+        }
+        Free(entryType);
+        Free(entryKey);
+        JsonFree(event);
+    }
+    StateFree(state);
+    RoomUnlock(room);
+
+    /* TODO: Filters, to, and friends */
+finish:
+    UserUnlock(user);
+    UserIdFree(id);
+    UserFreeList(messages);
+    if (sender)
+    {
+        Free(sender);
+    }
+    if (serverName)
+    {
+        Free(serverName);
+    }
+    return response;
+}

src/Routes/RouteSendEvent.c

@@ -173,6 +173,7 @@ ROUTE_IMPL(RouteSendState, path, argp)
     char *sender = NULL;
 
     Room *room = NULL;
+    State *state = NULL;
 
     char *err;
 
@@ -182,20 +183,10 @@ ROUTE_IMPL(RouteSendState, path, argp)
         HttpResponseStatus(args->context, HTTP_INTERNAL_SERVER_ERROR);
         return MatrixErrorCreate(M_UNKNOWN, NULL);
     }
-    if (HttpRequestMethodGet(args->context) != HTTP_PUT)
-    {
-        err = "Unknown request method.";
-        HttpResponseStatus(args->context, HTTP_BAD_REQUEST);
-        response = MatrixErrorCreate(M_UNRECOGNIZED, err);
-        goto finish;
-    }
 
-    serverName = ConfigGetServerName(db);
-    if (!serverName)
+    if (!stateKey)
     {
-        HttpResponseStatus(args->context, HTTP_INTERNAL_SERVER_ERROR);
-        response = MatrixErrorCreate(M_UNKNOWN, NULL);
-        goto finish;
+        stateKey = "";
     }
 
     response = MatrixGetAccessToken(args->context, &token);
@@ -203,6 +194,55 @@ ROUTE_IMPL(RouteSendState, path, argp)
     {
         goto finish;
     }
+    user = UserAuthenticate(db, token);
+    if (!user)
+    {
+        HttpResponseStatus(args->context, HTTP_UNAUTHORIZED);
+        response = MatrixErrorCreate(M_UNKNOWN_TOKEN, NULL);
+        goto finish;
+    }
+    serverName = ConfigGetServerName(db);
+    if (!serverName)
+    {
+        HttpResponseStatus(args->context, HTTP_INTERNAL_SERVER_ERROR);
+        response = MatrixErrorCreate(M_UNKNOWN, NULL);
+        goto finish;
+    }
+    id = UserIdParse(UserGetName(user), serverName);
+    id->sigil = '@';
+    sender = ParserRecomposeCommonID(*id);
+
+    switch (HttpRequestMethodGet(args->context))
+    {
+        case HTTP_GET:
+            room = RoomLock(db, roomId);
+            if (!RoomContainsUser(room, sender))
+            {
+                err = "User is not in the room.";
+                HttpResponseStatus(args->context, HTTP_UNAUTHORIZED);
+                response = MatrixErrorCreate(M_FORBIDDEN, err);
+                goto finish;
+            }
+
+            state = StateCurrent(room);
+            event = RoomEventFetch(room, StateGet(state, eventType, stateKey));
+            if (!event)
+            {
+                err = "Event could not be found.";
+                HttpResponseStatus(args->context, HTTP_NOT_FOUND);
+                response = MatrixErrorCreate(M_UNKNOWN, err);
+                StateFree(state);
+                goto finish;
+            }
+
+            response = JsonDuplicate(JsonValueAsObject(
+                HashMapGet(event, "content")
+            ));
+
+            StateFree(state);
+            JsonFree(event);
+            break;
+        case HTTP_PUT:
 
             request = JsonDecode(HttpServerStream(args->context));
             if (!request)
@@ -212,17 +252,6 @@ ROUTE_IMPL(RouteSendState, path, argp)
                 goto finish;
             }
 
-    user = UserAuthenticate(db, token);
-    if (!user)
-    {
-        HttpResponseStatus(args->context, HTTP_UNAUTHORIZED);
-        response = MatrixErrorCreate(M_UNKNOWN_TOKEN, NULL);
-        goto finish;
-    }
-    id = UserIdParse(UserGetName(user), serverName);
-    id->sigil = '@';
-    sender = ParserRecomposeCommonID(*id);
-
             room = RoomLock(db, roomId);
             if (!RoomContainsUser(room, sender))
             {
@@ -253,6 +282,13 @@ ROUTE_IMPL(RouteSendState, path, argp)
                 JsonValueDuplicate(HashMapGet(filled, "event_id"))
             );
             JsonFree(filled);
+            break;
+        default:
+            err = "Unknown request method.";
+            HttpResponseStatus(args->context, HTTP_BAD_REQUEST);
+            response = MatrixErrorCreate(M_UNRECOGNIZED, err);
+            goto finish;
+    }
 finish:
     RoomUnlock(room);
     Free(serverName);

src/include/Matrix.h

@@ -170,4 +170,10 @@ extern JsonValue * MatrixGetJSON(HashMap *, char *);
  */
 extern JsonValue * MatrixSetJSON(HashMap *, char *, JsonValue *);
 
+/**
+ * Traverses the entire JSON object and verifies if no floating-point 
+ * values are present within it.
+ */
+extern bool MatrixCheckFloats(HashMap *);
+
 #endif

src/include/Room.h

@@ -99,14 +99,6 @@ extern char * RoomIdGet(Room *);
  */
 extern int RoomVersionGet(Room *);
 
-/**
- * Resolve the state for the latest events in the
- * room. This function uses the appropriate state
- * resolution algorithm to compute the latest state,
- * which is used to select auth events on incoming
- * client events.
- */
-extern State * RoomStateGet(Room *);
 /** 
  * Resolves the room's state before a specific point, 
  * (with the event hashmap taking priority),

src/include/Routes.h

@@ -111,6 +111,7 @@ ROUTE(RouteFetchEvent);
 ROUTE(RouteJoinedRooms);
 ROUTE(RouteSync);
 ROUTE(RouteMessages);
+ROUTE(RouteMembers);
 
 ROUTE(RouteAliasDirectory);
 ROUTE(RouteRoomAliases);