From 117eb25e36ac3b1e1ba18cc9f1e177016c076f34 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sat, 3 Aug 2019 01:52:27 +0200
Subject: Add search suggestions for youtube & manganelo

---
 src/Youtube.cpp | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 54 insertions(+), 4 deletions(-)

(limited to 'src/Youtube.cpp')

diff --git a/src/Youtube.cpp b/src/Youtube.cpp
index d8b046f..9f9c4c2 100644
--- a/src/Youtube.cpp
+++ b/src/Youtube.cpp
@@ -1,11 +1,11 @@
 #include "../plugins/Youtube.hpp"
 #include <quickmedia/HtmlSearch.h>
+#include <json/reader.h>
 
 namespace QuickMedia {
     SearchResult Youtube::search(const std::string &text, std::vector<std::unique_ptr<BodyItem>> &result_items) {
         std::string url = "https://youtube.com/results?search_query=";
-        // TODO: Escape @text
-        url += text;
+        url += url_param_encode(text);
 
         std::string website_data;
         if(download_to_string(url, website_data) != DownloadResult::OK)
@@ -21,8 +21,6 @@ namespace QuickMedia {
                 auto *result_items = (std::vector<std::unique_ptr<BodyItem>>*)userdata;
                 const char *href = quickmedia_html_node_get_attribute_value(node, "href");
                 const char *title = quickmedia_html_node_get_attribute_value(node, "title");
-                printf("a href: %s, title: %s\n", href, title);
-
                 auto item = std::make_unique<BodyItem>(title);
                 result_items->push_back(std::move(item));
             }, &result_items);
@@ -31,4 +29,56 @@ namespace QuickMedia {
         quickmedia_html_search_deinit(&html_search);
         return result == 0 ? SearchResult::OK : SearchResult::ERR;
     }
+
+    static void iterate_suggestion_result(const Json::Value &value, std::vector<std::unique_ptr<BodyItem>> &result_items, int &ignore_count) {
+        if(value.isArray()) {
+            for(const Json::Value &child : value) {
+                iterate_suggestion_result(child, result_items, ignore_count);
+            }
+        } else if(value.isString()) {
+            if(ignore_count > 1) {
+                auto item = std::make_unique<BodyItem>(value.asString());
+                result_items.push_back(std::move(item));
+            }
+            ++ignore_count;
+        }
+    }
+
+    SuggestionResult Youtube::update_search_suggestions(const std::string &text, std::vector<std::unique_ptr<BodyItem>> &result_items) {
+        if(text.empty())
+            return SuggestionResult::OK;
+
+        std::string url = "https://clients1.google.com/complete/search?client=youtube&hl=en&gl=us&q=";
+        url += url_param_encode(text);
+
+        std::string server_response;
+        if(download_to_string(url, server_response) != DownloadResult::OK)
+            return SuggestionResult::NET_ERR;
+
+        size_t json_start = server_response.find_first_of('(');
+        if(json_start == std::string::npos)
+            return SuggestionResult::ERR;
+        ++json_start;
+
+        size_t json_end = server_response.find_last_of(')');
+        if(json_end == std::string::npos)
+            return SuggestionResult::ERR;
+
+        if(json_end == 0 || json_start >= json_end)
+            return SuggestionResult::ERR;
+        --json_end;
+
+        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 suggestions json error: %s\n", json_errors.c_str());
+            return SuggestionResult::ERR;
+        }
+
+        int ignore_count = 0;
+        iterate_suggestion_result(json_root, result_items, ignore_count);
+        return SuggestionResult::OK;
+    }
 }
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