From de45f6d8d7d777244006a7998ec971157e51296e Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Fri, 18 Nov 2022 23:32:08 +0100
Subject: Readd meme gpg encryption in matrix, this time asynchronous
 decryption

of only visible items
---
 plugins/Matrix.hpp | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

(limited to 'plugins')

diff --git a/plugins/Matrix.hpp b/plugins/Matrix.hpp
index e5c86e8..8b9dcc9 100644
--- a/plugins/Matrix.hpp
+++ b/plugins/Matrix.hpp
@@ -30,6 +30,38 @@ namespace QuickMedia {
     std::string message_to_qm_text(Matrix *matrix, const Message *message, bool allow_formatted_text = true, mgl::vec2i image_max_size = mgl::vec2i(0, 0));
     std::string pantalaimon_url_to_homeserver_url(Matrix *matrix, const std::string &url);
     Message* get_latest_message_in_edit_chain(Message *message);
+    bool matrix_gpg_encrypt_for_each_user_in_room(Matrix *matrix, RoomData *room, const std::string &my_gpg_user_id, const std::string &str, std::string &encrypted_str);
+
+    struct MatrixChatBodyDecryptJob {
+        enum class DecryptState {
+            NOT_DECRYPTED,
+            DECRYPTING,
+            DECRYPTED,
+            FAILED_TO_DECRYPT
+        };
+
+        std::string text;
+        DecryptState decrypt_state = DecryptState::NOT_DECRYPTED;
+        bool cancel = false;
+    };
+
+    class MatrixChatBodyItemData : public BodyItemExtra {
+    public:
+        enum class DecryptState {
+            NOT_DECRYPTED,
+            DECRYPTING,
+            DECRYPTED
+        };
+
+        MatrixChatBodyItemData(Matrix *matrix, std::string text_to_decrypt) : matrix(matrix), text_to_decrypt(std::move(text_to_decrypt)) {}
+        ~MatrixChatBodyItemData();
+        void draw_overlay(mgl::Window&, const Widgets &widgets) override;
+
+        DecryptState decrypt_state = DecryptState::NOT_DECRYPTED;
+        std::shared_ptr<MatrixChatBodyDecryptJob> decrypt_job;
+        Matrix *matrix = nullptr;
+        std::string text_to_decrypt;
+    };
 
     struct TimestampedDisplayData {
         std::string data;
@@ -178,7 +210,7 @@ namespace QuickMedia {
         bool users_fetched = false;
         time_t last_read_message_timestamp = 0;
         std::shared_ptr<BodyItem> body_item;
-        std::string latest_message;
+        int offset_to_latest_message_text = 0;
 
         // These are messages fetched with |Matrix::get_message_by_id|. Needed to show replies, when replying to old message not part of /sync.
         // The value is nullptr if the message is fetched and cached but the event if referenced an invalid message.
@@ -707,6 +739,8 @@ namespace QuickMedia {
         std::string body_to_formatted_body(RoomData *room, const std::string &body);
         void on_exit_room(RoomData *room);
 
+        void async_decrypt_message(std::shared_ptr<MatrixChatBodyDecryptJob> decrypt_job);
+
         // Calls the |MatrixDelegate| pending events.
         // Should be called from the main (ui) thread
         void update();
@@ -761,6 +795,7 @@ namespace QuickMedia {
         void load_silenced_invites();
     private:
         MessageQueue<std::function<void()>> ui_thread_tasks;
+
         std::vector<std::unique_ptr<RoomData>> rooms;
         std::unordered_map<std::string, size_t> room_data_by_id; // value is an index into |rooms|
         std::recursive_mutex room_data_mutex;
@@ -799,5 +834,8 @@ namespace QuickMedia {
         std::unordered_map<std::string, CustomEmoji> custom_emoji_by_key;
         std::unordered_set<std::string> silenced_invites;
         std::unordered_map<std::string, int64_t> qm_read_markers_by_room_cache;
+
+        MessageQueue<std::shared_ptr<MatrixChatBodyDecryptJob>> decrypt_task;
+        std::thread decrypt_thread;
     };
 }
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