From 18467b4cd333ab0b7aa10b1c1acd83942c583e60 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Fri, 3 Jul 2020 16:55:19 +0200
Subject: Add tab autocomplete for youtube

---
 src/plugins/Youtube.cpp | 70 ++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 54 insertions(+), 16 deletions(-)

(limited to 'src/plugins/Youtube.cpp')

diff --git a/src/plugins/Youtube.cpp b/src/plugins/Youtube.cpp
index c0180d8..3ab405c 100644
--- a/src/plugins/Youtube.cpp
+++ b/src/plugins/Youtube.cpp
@@ -3,6 +3,60 @@
 #include <string.h>
 
 namespace QuickMedia {
+    static void iterate_suggestion_result(const Json::Value &value, std::vector<std::string> &result_items, int &iterate_count) {
+        ++iterate_count;
+        if(value.isArray()) {
+            for(const Json::Value &child : value) {
+                iterate_suggestion_result(child, result_items, iterate_count);
+            }
+        } else if(value.isString() && iterate_count > 2) {
+            result_items.push_back(value.asString());
+        }
+    }
+
+    std::string Youtube::autocomplete_search(const std::string &query) {
+        // Return the last result if the query is a substring of the autocomplete result
+        if(last_autocomplete_result.size() >= query.size() && memcmp(query.data(), last_autocomplete_result.data(), query.size()) == 0)
+            return last_autocomplete_result;
+
+        std::string url = "https://clients1.google.com/complete/search?client=youtube&hl=en&gs_rn=64&gs_ri=youtube&ds=yt&cp=7&gs_id=x&q=";
+        url += url_param_encode(query);
+
+        std::string server_response;
+        if(download_to_string(url, server_response, {}, use_tor, true) != DownloadResult::OK)
+            return query;
+
+        size_t json_start = server_response.find_first_of('(');
+        if(json_start == std::string::npos)
+            return query;
+        ++json_start;
+
+        size_t json_end = server_response.find_last_of(')');
+        if(json_end == std::string::npos)
+            return query;
+
+        if(json_end == 0 || json_start >= json_end)
+            return query;
+
+        Json::Value json_root;
+        Json::CharReaderBuilder json_builder;
+        std::unique_ptr<Json::CharReader> json_reader(json_builder.newCharReader());
+        std::string json_errors;
+        if(!json_reader->parse(&server_response[json_start], &server_response[json_end], &json_root, &json_errors)) {
+            fprintf(stderr, "Youtube autocomplete search json error: %s\n", json_errors.c_str());
+            return query;
+        }
+
+        int iterate_count = 0;
+        std::vector<std::string> result_items;
+        iterate_suggestion_result(json_root, result_items, iterate_count);
+        if(result_items.empty())
+            return query;
+        
+        last_autocomplete_result = result_items[0];
+        return result_items[0];
+    }
+
     static size_t find_end_of_json(const std::string &website_data, size_t data_start) {
         int brace_count = 0;
         char string_char = '\0';
@@ -228,14 +282,6 @@ namespace QuickMedia {
         }
     }
 
-    static std::string get_playlist_id_from_url(const std::string &url) {
-        std::string playlist_id = url;
-        size_t list_index = playlist_id.find("&list=");
-        if(list_index == std::string::npos)
-            return playlist_id;
-        return playlist_id.substr(list_index);
-    }
-
     static std::string remove_index_from_playlist_url(const std::string &url) {
         std::string result = url;
         size_t index = result.rfind("&index=");
@@ -280,14 +326,6 @@ namespace QuickMedia {
         BodyItems result_items;
 
         std::string modified_url = remove_index_from_playlist_url(url);
-        std::string playlist_id = get_playlist_id_from_url(modified_url);
-        if(playlist_id == last_related_media_playlist_id) {
-            result_items.reserve(last_playlist_data.size());
-            for(auto &data : last_playlist_data) {
-                result_items.push_back(std::make_unique<BodyItem>(*data));
-            }
-            return result_items;
-        }
 
         std::string website_data;
         if(download_to_string(modified_url, website_data, {}, use_tor, true) != DownloadResult::OK)
-- 
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