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path: root/src/plugins/DramaCool.cpp
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#include "../../plugins/DramaCool.hpp"
#include "../../include/Theme.hpp"
#include "../../include/StringUtils.hpp"
#include "../../include/M3U8.hpp"
#include "../../plugins/utils/WatchProgress.hpp"
#include <json/value.h>
#include <quickmedia/HtmlSearch.h>

// TODO: Add bookmarks page, history, track watch progress, automatically go to next episode, subscribe, etc.

namespace QuickMedia {
    SearchResult DramaCoolSearchPage::search(const std::string &str, BodyItems &result_items) {
        if(str.empty())
            return SearchResult::OK;

        std::vector<CommandArg> additional_args = {
            { "-H", "x-requested-with: XMLHttpRequest" }
        };

        Json::Value json_root;
        DownloadResult result = download_json(json_root, "https://dramacool.cr/search?keyword=" + url_param_encode(str) + "&type=movies", std::move(additional_args), true);
        if(result != DownloadResult::OK) return download_result_to_search_result(result);

        if(!json_root.isArray())
            return SearchResult::ERR;

        for(const Json::Value &json_item : json_root) {
            if(!json_item.isObject())
                continue;

            const Json::Value &name_json = json_item["name"];
            const Json::Value &status_json = json_item["status"];
            const Json::Value &cover_url_json = json_item["cover"];
            const Json::Value &url_json = json_item["url"];

            if(!name_json.isString() || !url_json.isString())
                continue;

            auto body_item = BodyItem::create(name_json.asString());
            if(status_json.isString()) {
                body_item->set_description(status_json.asString());
                body_item->set_description_color(get_theme().faded_text_color);
            }
            if(cover_url_json.isString()) {
                body_item->thumbnail_url = "https://imagecdn.me/" + url_param_encode(cover_url_json.asString());
                body_item->thumbnail_size = { 150, 225 };
            }
            body_item->url = "https://dramacool.cr" + url_json.asString();

            result_items.push_back(std::move(body_item));
        }

        return SearchResult::OK;
    }

    static bool node_get_inner_text(const QuickMediaHtmlChildNode *node, QuickMediaStringView &str) {
        if(!node || !node->node.is_tag || !node->node.first_child || node->node.first_child->node.is_tag)
            return false;

        str = node->node.first_child->node.name;
        return true;
    }

    PluginResult DramaCoolSearchPage::submit(const SubmitArgs &args, std::vector<Tab> &result_tabs) {
        std::string website_data;
        DownloadResult result = download_to_string(args.url, website_data, {}, true);
        if(result != DownloadResult::OK) return download_result_to_plugin_result(result);

        BodyItems result_items;

        QuickMediaHtmlSearch html_search;
        int res = quickmedia_html_search_init(&html_search, website_data.c_str(), website_data.size());
        if(res != 0)
            return PluginResult::ERR;

        quickmedia_html_find_nodes_xpath(&html_search, "//div[class='content']//a",
            [](QuickMediaMatchNode *node, void *userdata) {
                auto *result_items = (BodyItems*)userdata;
                QuickMediaStringView href = quickmedia_html_node_get_attribute_value(node->node, "href");
                if(!href.data || !memmem(href.data, href.size, ".html", 5))
                    return 0;

                QuickMediaHtmlChildNode *sub_node = node->node->first_child;
                if(!sub_node)
                    return 0;

                QuickMediaHtmlChildNode *title_node = sub_node->next;
                if(!title_node)
                    return 0;

                QuickMediaHtmlChildNode *time_node = title_node->next;
                if(!time_node)
                    return 0;

                QuickMediaStringView sub_str;
                QuickMediaStringView title_str;
                QuickMediaStringView time_str;
                if(!node_get_inner_text(sub_node, sub_str) || !node_get_inner_text(title_node, title_str) || !node_get_inner_text(time_node, time_str))
                    return 0;

                std::string title(title_str.data, title_str.size);
                html_unescape_sequences(title);

                std::string time(time_str.data, time_str.size);
                html_unescape_sequences(time);

                const bool is_subbed = sub_str.size == 3 && memcmp(sub_str.data, "SUB", 3) == 0;

                auto body_item = BodyItem::create(std::move(title));
                body_item->set_description((is_subbed ? "Subbed" : "Raw") + std::string(" • ") + time);
                body_item->set_description_color(get_theme().faded_text_color);
                body_item->url = "https://dramacool.cr" + std::string(href.data, href.size);
                result_items->push_back(std::move(body_item));

                return 0;
            }, &result_items);

        quickmedia_html_search_deinit(&html_search);

        auto body = create_body();
        body->set_items(std::move(result_items));
        result_tabs.push_back(Tab{ std::move(body), std::make_unique<DramaCoolEpisodesPage>(program, args.title), create_search_bar("Search...", SEARCH_DELAY_FILTER) });
        return PluginResult::OK;
    }

    struct VideoSources {
        //std::string streamsss;
        std::string streamtape;
        std::string mixdrop;
        std::string mp4upload;
    };

    static bool dembed_extract_video_source(const std::string &website_data, const std::string &video_source_url, std::string &video_source) {
        size_t st_start = website_data.find(video_source_url);
        if(st_start == std::string::npos)
            return false;

        st_start += video_source_url.size();
        size_t st_end = website_data.find("\"", st_start);
        if(st_end == std::string::npos)
            return false;

        video_source = "https://" + video_source_url + website_data.substr(st_start, st_end - st_start);
        return true;
    }

    static void dembed_extract_video_sources(const std::string &website_data, VideoSources &video_sources) {
        //dembed_extract_video_source(website_data, "streamsss.net", video_sources.streamsss);
        dembed_extract_video_source(website_data, "streamtape.com", video_sources.streamtape);
        dembed_extract_video_source(website_data, "mixdrop.co", video_sources.mixdrop);
        dembed_extract_video_source(website_data, "www.mp4upload.com", video_sources.mp4upload);
    }

    // TODO: Re-add. It's broken right now (because of the json_url has incorrect value I guess)
    /*
    static bool streamsss_extract_video_url(Page *page, const std::string &streamsss_url, std::string &url) {
        size_t url_end = streamsss_url.find("/e");
        if(url_end == std::string::npos)
            return false;

        size_t id_start = streamsss_url.find("e/");
        if(id_start == std::string::npos)
            return false;

        id_start += 2;
        size_t id_end = streamsss_url.find("?", id_start);
        if(id_end == std::string::npos)
            id_end = streamsss_url.size();

        const std::string url_base = streamsss_url.substr(0, url_end);
        const std::string id = streamsss_url.substr(id_start, id_end - id_start);
        
        std::ostringstream id_hex;
        id_hex << std::hex;
        for(size_t i = 0; i < id.size(); ++i)
            id_hex << (int)(unsigned char)id[i];

        const std::string json_url = url_base + "/sources43/566d337678566f743674494a7c7c" + id_hex.str() + "7c7c346b6767586d6934774855537c7c73747265616d7362/6565417268755339773461447c7c346133383438333436313335376136323337373433383634376337633465366534393338373136643732373736343735373237613763376334363733353737303533366236333463353333363534366137633763373337343732363536313664373336327c7c6b586c3163614468645a47617c7c73747265616d7362";

        Json::Value json_root;
        DownloadResult result = page->download_json(json_root, json_url, {}, true);
        if(result != DownloadResult::OK)
            return false;

        if(!json_root.isObject())
            return false;

        const Json::Value &stream_data_json = json_root["stream_data"];
        if(!stream_data_json.isObject())
            return false;

        const Json::Value &file_json = stream_data_json["file"];
        if(!file_json.isString())
            return false;

        // TODO: Record resolution and duration
        std::string website_data;
        result = download_to_string(file_json.asString(), website_data, {}, true);
        if(result != DownloadResult::OK)
            return false;

        url = M3U8Stream::get_highest_resolution_stream(m3u8_get_streams(website_data)).url;
        return true;
    }
    */
    static bool streamtape_extract_video_url(const std::string &website_data, std::string &url) {
        size_t id_start = website_data.find("getElementById('robotlink')");
        if(id_start == std::string::npos)
            return false;

        id_start += 27;
        id_start = website_data.find("id=", id_start);
        if(id_start == std::string::npos)
            return false;

        id_start += 3;
        size_t id_end = website_data.find("'", id_start);
        if(id_end == std::string::npos)
            return false;

        url = "https://streamtape.com/get_video?id=" + website_data.substr(id_start, id_end - id_start);
        return true;
    }

    static bool mixdrop_extract_mdcore_script(const std::string &website_data, const std::string &prefix, std::string &mdcore_script) {
        size_t script_start = website_data.find(prefix);
        if(script_start == std::string::npos)
            return false;

        script_start += prefix.size();
        size_t script_end = website_data.find("\"", script_start);
        if(script_end == std::string::npos)
            return false;

        mdcore_script = website_data.substr(script_start, script_end - script_start);
        return true;
    }

    static bool mixdrop_extract_mdcore_parts(const std::string &website_data, std::vector<std::string> &parts) {
        size_t mdcore_start = website_data.find(",'|");
        if(mdcore_start == std::string::npos) {
            mdcore_start = website_data.find("MDCore|");
            if(mdcore_start == std::string::npos)
                return false;
        } else {
            mdcore_start += 2;
        }

        size_t mdcore_end = website_data.find("'", mdcore_start);
        if(mdcore_end == std::string::npos)
            return false;

        std::string mdcore_str = website_data.substr(mdcore_start, mdcore_end - mdcore_start);
        string_split(mdcore_str, '|', [&parts](const char *str, size_t size) {
            parts.emplace_back(str, size);
            return true;
        });

        return true;
    }

    static int mdcore_number_get(char c) {
        if(c >= '0' && c <= '9')
            return c - '0';
        else if(c >= 'a' && c <= 'z')
            return 10 + (c - 'a');
        else
            return -1;
    }

    static bool mixdrop_extract_video_url(const std::string &website_data, const std::string &prefix, std::string &url) {
        std::string mdcore_script;
        if(!mixdrop_extract_mdcore_script(website_data, prefix, mdcore_script))
            return false;

        std::vector<std::string> mdcore_parts;
        if(!mixdrop_extract_mdcore_parts(website_data, mdcore_parts))
            return false;

        for(size_t i = 0; i < mdcore_script.size();) {
            char c = mdcore_script[i];
            int index = mdcore_number_get(c);

            if(index >= 0) {
                ++i;
                while(i < mdcore_script.size() && ((mdcore_script[i] >= '0' && mdcore_script[i] <= '9') || (mdcore_script[i] >= 'a' && mdcore_script[i] <= 'z'))) {
                    // 36 = 0-9 + a-z
                    index = (index * 36) + mdcore_number_get(mdcore_script[i]);
                    ++i;
                }
            } else {
                url += c;
                ++i;
                continue;
            }

            if(index >= (int)mdcore_parts.size() || mdcore_parts[index].empty())
                url += c;
            else
                url += mdcore_parts[index];
        }

        if(string_starts_with(url, "//"))
            url = "http:" + url;

        return true;
    }

    PluginResult DramaCoolEpisodesPage::submit(const SubmitArgs &args, std::vector<Tab> &result_tabs) {
        std::string website_data;
        DownloadResult result = download_to_string(args.url, website_data, {}, true);
        if(result != DownloadResult::OK) return download_result_to_plugin_result(result);

        std::string video_sources_url;

        QuickMediaHtmlSearch html_search;
        int res = quickmedia_html_search_init(&html_search, website_data.c_str(), website_data.size());
        if(res != 0)
            return PluginResult::ERR;

        quickmedia_html_find_nodes_xpath(&html_search, "//div",
            [](QuickMediaMatchNode *node, void *userdata) {
                auto *video_sources_url = (std::string*)userdata;
                QuickMediaStringView klass = quickmedia_html_node_get_attribute_value(node->node, "class");
                if(!klass.data || !memmem(klass.data, klass.size, "watch_video", 11))
                    return 0;

                QuickMediaHtmlChildNode *iframe_node = node->node->first_child;
                if(!iframe_node || !iframe_node->node.is_tag || iframe_node->node.name.size != 6 || memcmp(iframe_node->node.name.data, "iframe", 6) != 0)
                    return 0;

                QuickMediaStringView src = quickmedia_html_node_get_attribute_value(&iframe_node->node, "src");
                if(!src.data)
                    return 0;

                video_sources_url->assign(src.data, src.size);
                return 1;
            }, &video_sources_url);

        quickmedia_html_search_deinit(&html_search);

        if(video_sources_url.empty())
            return PluginResult::ERR;

        if(string_starts_with(video_sources_url, "//"))
            video_sources_url = "https:" + video_sources_url;

        result = download_to_string(video_sources_url, website_data, {}, true);
        if(result != DownloadResult::OK) return download_result_to_plugin_result(result);

        // TODO: Extract all video sources and allow the user to select which one to use.
        // Streamtape or mixdrop may not be available or if it's available it may not load properly
        // or the quality may be worse or slower than other sources.
        // We also want to load the high resolution version of the video.
        // TODO: Make videos sources work even when captions are not embedded.
        VideoSources video_sources;
        dembed_extract_video_sources(website_data, video_sources);

        std::string video_url;
        std::string referer;

        if(!video_sources.streamtape.empty() && video_url.empty()) {
            result = download_to_string(video_sources.streamtape, website_data, {}, true);
            if(result != DownloadResult::OK) return download_result_to_plugin_result(result);
            streamtape_extract_video_url(website_data, video_url);

            if(!video_url.empty())
                referer = "https://streamtape.com";
        }
        
        if(!video_sources.mixdrop.empty() && video_url.empty()) {
            result = download_to_string(video_sources.mixdrop, website_data, {}, true);
            if(result != DownloadResult::OK) return download_result_to_plugin_result(result);
            mixdrop_extract_video_url(website_data, "0.f=\"", video_url);

            if(!video_url.empty())
                referer = "https://mixdrop.co";
        }

        if(!video_sources.mp4upload.empty() && video_url.empty()) {
            result = download_to_string(video_sources.mp4upload, website_data, {}, true);
            if(result != DownloadResult::OK) return download_result_to_plugin_result(result);
            // mp4upload uses the same algorithm as mixdrop but with different format
            mixdrop_extract_video_url(website_data, "2.25(\"", video_url);

            if(!video_url.empty())
                referer = "https://www.mp4upload.com";
        }

        if(video_url.empty())
            return PluginResult::ERR;

        /*
        if(!video_sources.streamsss.empty() && video_url.empty()) {
            streamsss_extract_video_url(this, video_sources.streamsss, video_url);
        }
        */

        result_tabs.push_back(Tab{ nullptr, std::make_unique<DramaCoolVideoPage>(program, std::move(video_url), series_name, args.title, std::move(referer)), nullptr });

        return PluginResult::OK;
    }

    PluginResult DramaCoolVideoPage::load(const SubmitArgs&, VideoInfo &video_info, std::string &err_str) {
        video_info.title = episode_name;
        video_info.channel_url.clear();
        video_info.duration = 0.0;
        video_info.chapters.clear();
        video_info.referer = referer;
        err_str.clear();
        return PluginResult::OK;
    }

    std::string DramaCoolVideoPage::get_url_timestamp() {
        // TODO: Remove very old videos, to not make this file too large which slows this down on slow harddrives
        std::unordered_map<std::string, WatchProgress> watch_progress = get_watch_progress_for_plugin("dramacool");
        auto it = watch_progress.find(get_video_id());
        if(it == watch_progress.end())
            return "";

        // If we are very close to the end then start from the beginning.
        // This is the same behavior as mpv.
        // This is better because we dont want the video player to stop immediately after we start playing and we dont get any chance to seek.
        if(it->second.time_pos_sec + 10.0 >= it->second.duration_sec)
            return "";
        else
            return std::to_string(it->second.time_pos_sec);
    }

    void DramaCoolVideoPage::set_watch_progress(int64_t time_pos_sec, int64_t duration_sec) {
        std::string video_id = get_video_id();
        set_watch_progress_for_plugin("dramacool", video_id, time_pos_sec, duration_sec, video_id);
    }

    std::string DramaCoolVideoPage::get_video_id() const {
        return series_name + "/" + episode_name;
    }
}