From 657edb8eb9ab2fdef60d9c5d23a4c3093a64d859 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Mon, 5 Aug 2019 18:17:00 +0200
Subject: Add manga chapter viewing

---
 src/plugins/Youtube.cpp | 120 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 src/plugins/Youtube.cpp

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

diff --git a/src/plugins/Youtube.cpp b/src/plugins/Youtube.cpp
new file mode 100644
index 0000000..6cc4ac6
--- /dev/null
+++ b/src/plugins/Youtube.cpp
@@ -0,0 +1,120 @@
+#include "../../plugins/Youtube.hpp"
+#include <quickmedia/HtmlSearch.h>
+#include <json/reader.h>
+#include <string.h>
+
+namespace QuickMedia {
+    static bool begins_with(const char *str, const char *begin_with) {
+        return strncmp(str, begin_with, strlen(begin_with)) == 0;
+    }
+
+    SearchResult Youtube::search(const std::string &text, std::vector<std::unique_ptr<BodyItem>> &result_items, Page &next_page) {
+        next_page = Page::SEARCH_RESULT;
+        std::string url = "https://youtube.com/results?search_query=";
+        url += url_param_encode(text);
+
+        std::string website_data;
+        if(download_to_string(url, website_data) != DownloadResult::OK)
+            return SearchResult::NET_ERR;
+
+        QuickMediaHtmlSearch html_search;
+        int result = quickmedia_html_search_init(&html_search, website_data.c_str());
+        if(result != 0)
+            goto cleanup;
+
+        result = quickmedia_html_find_nodes_xpath(&html_search, "//h3[class=\"yt-lockup-title\"]/a",
+            [](QuickMediaHtmlNode *node, void *userdata) {
+                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");
+                // Checking for watch?v helps skipping ads
+                if(href && title && begins_with(href, "/watch?v=")) {
+                    auto item = std::make_unique<BodyItem>(title);
+                    item->url = std::string("https://www.youtube.com") + href;
+                    result_items->push_back(std::move(item));
+                }
+            }, &result_items);
+
+        cleanup:
+        quickmedia_html_search_deinit(&html_search);
+        return result == 0 ? SearchResult::OK : SearchResult::ERR;
+    }
+
+    static void iterate_suggestion_result(const Json::Value &value, const std::string &search_text, std::vector<std::unique_ptr<BodyItem>> &result_items) {
+        if(value.isArray()) {
+            for(const Json::Value &child : value) {
+                iterate_suggestion_result(child, search_text, result_items);
+            }
+        } else if(value.isString()) {
+            std::string title = value.asString();
+            if(title != search_text) {
+                auto item = std::make_unique<BodyItem>(title);
+                result_items.push_back(std::move(item));
+            }
+        }
+    }
+
+    SuggestionResult Youtube::update_search_suggestions(const std::string &text, std::vector<std::unique_ptr<BodyItem>> &result_items) {
+        result_items.push_back(std::make_unique<BodyItem>(text));
+        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;
+        }
+
+        iterate_suggestion_result(json_root, text, result_items);
+        return SuggestionResult::OK;
+    }
+
+    std::vector<std::unique_ptr<BodyItem>> Youtube::get_related_media(const std::string &url) {
+        std::vector<std::unique_ptr<BodyItem>> result_items;
+
+        std::string website_data;
+        if(download_to_string(url, website_data) != DownloadResult::OK)
+            return result_items;
+
+        QuickMediaHtmlSearch html_search;
+        int result = quickmedia_html_search_init(&html_search, website_data.c_str());
+        if(result != 0)
+            goto cleanup;
+
+        result = quickmedia_html_find_nodes_xpath(&html_search, "//ul[class=\"video-list\"]//div[class=\"content-wrapper\"]/a",
+            [](QuickMediaHtmlNode *node, void *userdata) {
+                auto *result_items = (std::vector<std::unique_ptr<BodyItem>>*)userdata;
+                const char *href = quickmedia_html_node_get_attribute_value(node, "href");
+                // TODO: Also add title for related media
+                if(href && begins_with(href, "/watch?v=")) {
+                    auto item = std::make_unique<BodyItem>("");
+                    item->url = std::string("https://www.youtube.com") + href;
+                    result_items->push_back(std::move(item));
+                }
+            }, &result_items);
+
+        cleanup:
+        quickmedia_html_search_deinit(&html_search);
+        return result_items;
+    }
+}
\ No newline at end of file
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