From e47a34f3c4d9f892c002d0dce7fb43a3ca1b4f28 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Wed, 14 Dec 2022 22:26:59 +0100
Subject: Matrix: do not progress if internet is down (load qm read markers
 fails)

---
 plugins/Matrix.hpp     |  2 +-
 src/plugins/Matrix.cpp | 20 +++++++++++++++-----
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/plugins/Matrix.hpp b/plugins/Matrix.hpp
index 0a2092c..4af8442 100644
--- a/plugins/Matrix.hpp
+++ b/plugins/Matrix.hpp
@@ -749,7 +749,7 @@ namespace QuickMedia {
         PluginResult set_pinned_events(RoomData *room, const std::vector<std::string> &pinned_events, bool is_add);
 
         PluginResult set_qm_last_read_message_timestamp(RoomData *room, int64_t timestamp);
-        void load_qm_read_markers_from_account_data();
+        bool load_qm_read_markers_from_account_data();
 
         PluginResult parse_sync_response(const rapidjson::Document &root, bool initial_sync);
         PluginResult parse_notifications(const rapidjson::Value &notifications_json, std::function<void(const MatrixNotification&)> callback_func);
diff --git a/src/plugins/Matrix.cpp b/src/plugins/Matrix.cpp
index 5355208..fae8451 100644
--- a/src/plugins/Matrix.cpp
+++ b/src/plugins/Matrix.cpp
@@ -1667,7 +1667,11 @@ namespace QuickMedia {
             FILE *sync_cache_file;
             const rapidjson::Value *next_batch_json = nullptr;
 
-            load_qm_read_markers_from_account_data(); // TODO: Remove when https://github.com/matrix-org/synapse/issues/14444 is fixed, if ever.
+            if(!load_qm_read_markers_from_account_data()) { // TODO: Remove when https://github.com/matrix-org/synapse/issues/14444 is fixed, if ever.
+                show_notification("QuickMedia", "Failed to connect to matrix homeserver. Is your internet down?", Urgency::CRITICAL);
+                sync_running = false;
+                return;
+            }
 
             std::ifstream sync_cache_file_stream;
             sync_cache_file_stream.open(matrix_cache_dir.data.c_str(), std::ifstream::in | std::ifstream::binary);
@@ -5287,7 +5291,11 @@ namespace QuickMedia {
         rapidjson::Document request_data(rapidjson::kObjectType);
         {
             std::lock_guard<std::recursive_mutex> lock(room_data_mutex);
-            load_qm_read_markers_from_account_data(); // TODO: Only do this if multiple instances of quickmedia matrix is running (on the same account)
+            if(!load_qm_read_markers_from_account_data()) { // TODO: Only do this if multiple instances of quickmedia matrix is running (on the same account)
+                fprintf(stderr, "Error: load_qm_read_markers_from_account_data failed, failed to set read marker\n");
+                return PluginResult::ERR;
+            }
+
             qm_read_markers_by_room_cache[room->id] = timestamp;
             room->read_marker_event_timestamp = timestamp;
             for(const auto &[key, val] : qm_read_markers_by_room_cache) {
@@ -5314,7 +5322,7 @@ namespace QuickMedia {
         return PluginResult::OK;
     }
 
-    void Matrix::load_qm_read_markers_from_account_data() {
+    bool Matrix::load_qm_read_markers_from_account_data() {
         std::vector<CommandArg> additional_args = {
             { "-H", "content-type: application/json" },
             { "-H", "Authorization: Bearer " + access_token }
@@ -5325,11 +5333,11 @@ namespace QuickMedia {
         DownloadResult download_result = download_json(json_root, homeserver + "/_matrix/client/r0/user/" + my_user_id + "/account_data/qm.last_read_message_timestamp", std::move(additional_args), true, &err_msg);
         if(download_result != DownloadResult::OK) {
             fprintf(stderr, "Warning: failed to get account qm.last_read_message_timestamp\n");
-            return;
+            return false;
         }
 
         if(!json_root.IsObject())
-            return;
+            return false;
 
         std::lock_guard<std::recursive_mutex> lock(room_data_mutex);
         qm_read_markers_by_room_cache.clear();
@@ -5343,6 +5351,8 @@ namespace QuickMedia {
                 rooms[room_it->second]->read_marker_event_timestamp = obj.value.GetInt64();
             qm_read_markers_by_room_cache[std::move(room_id)] = obj.value.GetInt64();
         }
+
+        return true;
     }
 
     PluginResult Matrix::join_room(const std::string &room_id_or_name) {
-- 
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