Begin working on refresh route.

src/Routes/RouteMatrix.c

@@ -72,6 +72,10 @@ ROUTE_IMPL(RouteMatrix, args)
         {
             response = RouteRegister(args);
         }
+        else if (MATRIX_PATH_EQUALS(pathPart, "refresh"))
+        {
+            response = RouteRefresh(args);
+        }
         else
         {
             HttpResponseStatus(args->context, HTTP_NOT_FOUND);

src/Routes/RouteRefresh.c

@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
+ *
+ * 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 <string.h>
+
+#include <Memory.h>
+#include <Json.h>
+#include <HashMap.h>
+#include <Str.h>
+
+ROUTE_IMPL(RouteRefresh, args)
+{
+    HashMap *request;
+    HashMap *response = NULL;
+
+    JsonValue *val;
+    char *refreshToken;
+
+    char *oldAccessToken;
+    char *newAccessToken;
+    char *deviceId;
+
+    Db *db = args->matrixArgs->db;
+    LogConfig *lc = args->matrixArgs->lc;
+
+    DbRef *rtRef;
+    DbRef * oAtRef;
+    DbRef * nAtRef;
+
+    if (MATRIX_PATH_PARTS(args->path) > 0)
+    {
+        HttpResponseStatus(args->context, HTTP_NOT_FOUND);
+        return MatrixErrorCreate(M_NOT_FOUND);
+    }
+
+    if (HttpRequestMethodGet(args->context) != HTTP_POST)
+    {
+        HttpResponseStatus(args->context, HTTP_BAD_REQUEST);
+        return MatrixErrorCreate(M_UNRECOGNIZED);
+    }
+
+    request = JsonDecode(HttpStream(args->context));
+    if (!request)
+    {
+        HttpResponseStatus(args->context, HTTP_BAD_REQUEST);
+        return MatrixErrorCreate(M_NOT_JSON);
+    }
+
+    val = HashMapGet(request, "refresh_token");
+    if (!val || JsonValueType(val) != JSON_STRING)
+    {
+        HttpResponseStatus(args->context, HTTP_BAD_REQUEST);
+        response = MatrixErrorCreate(M_BAD_JSON);
+        goto finish;
+    }
+
+    refreshToken = JsonValueAsString(val);
+
+    /* Get the refresh token object */
+    rtRef = DbLock(db, 3, "tokens", "refresh", refreshToken);
+
+    if (!rtRef)
+    {
+        HttpResponseStatus(args->context, HTTP_BAD_REQUEST);
+        response = MatrixErrorCreate(M_UNKNOWN_TOKEN);
+        goto finish;
+    }
+
+    /* Get the access token and device the refresh token refreshes */
+    oldAccessToken = JsonValueAsString(HashMapGet(DbJson(rtRef), "refreshes"));
+    oAtRef = DbLock(db, 3, "tokens", "access", oldAccessToken);
+
+    if (!oAtRef)
+    {
+        Log(lc, LOG_ERR, "Refresh token '%s' points to an access token that doesn't exist.",
+            refreshToken);
+        Log(lc, LOG_WARNING, "This refresh token will be deleted.");
+        HttpResponseStatus(args->context, HTTP_INTERNAL_SERVER_ERROR);
+        response = MatrixErrorCreate(M_UNKNOWN);
+
+        DbUnlock(db, rtRef);
+        DbDelete(db, 3, "tokens", "refresh", refreshToken);
+
+        goto finish;
+    }
+
+    /* Get the user associated with the access token and device */
+
+    /* Generate a new access token associated with the device and user. */
+
+    /* Replace old access token in User */
+
+    /* Delete old access token */
+
+    /* Update the refresh token to point to the new access token */
+
+    /* Return the new access token and expiration timestamp to the client */
+    response = HashMapCreate();
+
+finish:
+    JsonFree(request);
+    DbUnlock(db, rtRef);
+    return response;
+}

src/Routes/RouteRegister.c

@@ -38,8 +38,6 @@ ROUTE_IMPL(RouteRegister, args)
     HashMap *request = NULL;
     HashMap *response = NULL;
 
-    char *pathPart = NULL;
-
     JsonValue *val;
 
     char *kind;
@@ -242,7 +240,7 @@ finish:
     }
     else
     {
-        pathPart = MATRIX_PATH_POP(args->path);
+        char *pathPart = MATRIX_PATH_POP(args->path);
 
         if (HttpRequestMethodGet(args->context) == HTTP_GET &&
             MATRIX_PATH_EQUALS(pathPart, "available"))

src/include/Routes.h

@@ -60,8 +60,10 @@ typedef struct RouteArgs
 ROUTE(RouteMainPage);              /* / */
 ROUTE(RouteWellKnown);             /* /.well-known */
 ROUTE(RouteMatrix);                /* /_matrix */
+
 ROUTE(RouteLogin);                 /* /_matrix/client/(r0|v3)/login */
 ROUTE(RouteRegister);              /* /_matrix/client/(r0|v3)/register */
+ROUTE(RouteRefresh);               /* /_matrix/client/(r0|v3)/refresh */
 
 #undef ROUTE