From 4b97ef51562df8d606cb8fe21cf9b4464767febb Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Mon, 1 Jun 2020 21:36:58 +0200
Subject: Improve 4chan thread list performance by asynchronous update and
 caching

---
 plugins/Fourchan.hpp | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

(limited to 'plugins')

diff --git a/plugins/Fourchan.hpp b/plugins/Fourchan.hpp
index 6534cfd..7b76f83 100644
--- a/plugins/Fourchan.hpp
+++ b/plugins/Fourchan.hpp
@@ -1,11 +1,15 @@
 #pragma once
 
 #include "ImageBoard.hpp"
+#include <thread>
+#include <mutex>
+#include <condition_variable>
 
 namespace QuickMedia {
     class Fourchan : public ImageBoard {
     public:
-        Fourchan() : ImageBoard("4chan") {}
+        Fourchan();
+        ~Fourchan() override;
         PluginResult get_front_page(BodyItems &result_items) override;
         SearchResult search(const std::string &url, BodyItems &result_items) override;
         SuggestionResult update_search_suggestions(const std::string &text, BodyItems &result_items) override;
@@ -17,5 +21,22 @@ namespace QuickMedia {
         int get_search_delay() const override { return 150; }
         Page get_page_after_search() const override { return Page::IMAGE_BOARD_THREAD_LIST; }
         bool search_is_filter() override { return true; }
+    private:
+        PluginResult get_threads_internal(const std::string &url, BodyItems &result_items);
+        void set_board_url(const std::string &new_url);
+        std::string get_board_url();
+        void set_board_thread_list(BodyItems body_items);
+        BodyItems get_board_thread_list();
+    private:
+        std::string current_board_url;
+        std::thread thread_list_update_thread;
+        BodyItems cached_thread_list_items;
+        std::mutex board_url_mutex;
+        std::mutex board_list_mutex;
+        std::condition_variable thread_list_cached_cv;
+        std::mutex thread_list_cache_mutex;
+        std::condition_variable thread_list_update_cv;
+        bool thread_list_cached = false;
+        bool running = true;
     };
 }
\ No newline at end of file
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