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path: root/src/plugins/Peertube.cpp
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#include "../../plugins/Peertube.hpp"
#include "../../include/Theme.hpp"
#include "../../include/Notification.hpp"
#include "../../include/Utils.hpp"
#include "../../include/StringUtils.hpp"
#include <json/value.h>

namespace QuickMedia {
    static const char* search_type_to_string(PeertubeSearchPage::SearchType search_type) {
        switch(search_type) {
            case PeertubeSearchPage::SearchType::VIDEO_CHANNELS:    return "video-channels";
            case PeertubeSearchPage::SearchType::VIDEO_PLAYLISTS:   return "video-playlists";
            case PeertubeSearchPage::SearchType::VIDEOS:            return "videos";
        }
        return "";
    }

    PluginResult PeertubeInstanceSelectionPage::submit(const std::string&, const std::string &url, std::vector<Tab> &result_tabs) {
        result_tabs.push_back(Tab{create_body(false, true), std::make_unique<PeertubeSearchPage>(program, url), create_search_bar("Search...", 500)});
        return PluginResult::OK;
    }

    static std::shared_ptr<BodyItem> create_instance_selection_item(const std::string &title, const std::string &url) {
        auto body_item = BodyItem::create(title);
        body_item->url = url;
        return body_item;
    }

    PluginResult PeertubeInstanceSelectionPage::lazy_fetch(BodyItems &result_items) {
        result_items.push_back(create_instance_selection_item("tube.midov.pl", "https://tube.midov.pl"));
        result_items.push_back(create_instance_selection_item("videos.lukesmith.xyz", "https://videos.lukesmith.xyz"));
        result_items.push_back(create_instance_selection_item("peertube.se", "https://peertube.se"));
        result_items.push_back(create_instance_selection_item("bittube.video", "https://bittube.video"));
        result_items.push_back(create_instance_selection_item("video.nobodyhasthe.biz", "https://video.nobodyhasthe.biz"));
        result_items.push_back(create_instance_selection_item("libre.tube", "https://libre.tube"));
        result_items.push_back(create_instance_selection_item("open.tube", "https://open.tube"));
        result_items.push_back(create_instance_selection_item("runtube.re", "https://runtube.re"));
        result_items.push_back(create_instance_selection_item("tube.kenfm.de", "https://tube.kenfm.de"));
        result_items.push_back(create_instance_selection_item("tcode.kenfm.de", "https://tcode.kenfm.de"));
        result_items.push_back(create_instance_selection_item("tube.querdenken-711.de", "https://tube.querdenken-711.de"));
        result_items.push_back(create_instance_selection_item("peertube.rage.lol", "https://peertube.rage.lol"));
        result_items.push_back(create_instance_selection_item("gegenstimme.tv", "https://gegenstimme.tv"));
        result_items.push_back(create_instance_selection_item("tv.poa.st", "https://tv.poa.st"));
        result_items.push_back(create_instance_selection_item("libre.video", "https://libre.video"));
        result_items.push_back(create_instance_selection_item("gorf.tube", "https://gorf.tube"));
        result_items.push_back(create_instance_selection_item("neogenesis.tv", "https://neogenesis.tv"));
        return PluginResult::OK;
    }

    PeertubeSearchPage::PeertubeSearchPage(Program *program, const std::string &server_) : LazyFetchPage(program), server(server_) {
        if(!server.empty() && server.back() == '/')
            server.pop_back();
    }

    SearchResult PeertubeSearchPage::search(const std::string &str, BodyItems &result_items) {
        return plugin_result_to_search_result(get_page(str, 0, result_items));
    }

    // TODO: Support remote content
    static std::shared_ptr<BodyItem> search_data_to_body_item(const Json::Value &data_json, const std::string &server, PeertubeSearchPage::SearchType search_type) {
        if(!data_json.isObject())
            return nullptr;

        const Json::Value &name_json = data_json["name"];
        const Json::Value &host_json = data_json["host"];
        const Json::Value &display_name_json = data_json["displayName"];
        const Json::Value &uuid_json = data_json["uuid"];
        const Json::Value &short_uuid_json = data_json["shortUUID"];

        std::string name_str;
        if(name_json.isString())
            name_str = name_json.asString();

        std::string display_name_str;
        if(display_name_json.isString())
            display_name_str = display_name_json.asString();
        else
            display_name_str = name_str;

        auto body_item = BodyItem::create(std::move(display_name_str));
        body_item->userdata = (void*)search_type;

        if(search_type == PeertubeSearchPage::SearchType::VIDEO_PLAYLISTS) {
            if(uuid_json.isString())
                body_item->url = uuid_json.asString();
        } else {
            if(short_uuid_json.isString())
                body_item->url = short_uuid_json.asString();
            else if(name_json.isString() && host_json.isString())
                body_item->url = name_str + "@" + host_json.asString();
            else if(uuid_json.isString())
                body_item->url = uuid_json.asString();
            else
                return nullptr;
        }

        std::string description;
        const Json::Value &videos_length_json = data_json["videosLength"];
        if(videos_length_json.isInt())
            description += std::to_string(videos_length_json.asInt()) + " video" + (videos_length_json.asInt() == 1 ? "" : "s");

        const Json::Value &views_json = data_json["views"];
        if(views_json.isInt())
            description += std::to_string(views_json.asInt()) + " view" + (views_json.asInt() == 1 ? "" : "s");

        const Json::Value published_at_json = data_json["publishedAt"];
        if(published_at_json.isString()) {
            if(!description.empty())
                description += " • ";
            const time_t unix_time = iso_utc_to_unix_time(published_at_json.asCString());
            description += "Published " + seconds_to_relative_time_str(time(nullptr) - unix_time);
        }

        const Json::Value updated_at_json = data_json["updatedAt"];
        if(!published_at_json.isString() && updated_at_json.isString()) {
            if(!description.empty())
                description += " • ";
            const time_t unix_time = iso_utc_to_unix_time(updated_at_json.asCString());
            description += "Updated " + seconds_to_relative_time_str(time(nullptr) - unix_time);
        }

        const Json::Value &duration_json = data_json["duration"];
        if(duration_json.isInt()) {
            if(!description.empty())
                description += '\n';
            description += seconds_to_duration(duration_json.asInt());
        }

        for(const char *field_name : { "account", "videoChannel", "ownerAccount" }) {
            const Json::Value &account_json = data_json[field_name];
            if(account_json.isObject()) {
                const Json::Value &channel_name_json = account_json["name"];
                if(channel_name_json.isString()) {
                    if(!description.empty())
                        description += '\n';

                    description += channel_name_json.asString();

                    const Json::Value &account_host_json = account_json["host"];
                    if(account_host_json.isString())
                        description += "@" + account_host_json.asString();

                    break;
                }
            }
        }

        if(!description.empty()) {
            body_item->set_description(std::move(description));
            body_item->set_description_color(get_theme().faded_text_color);
        }

        const Json::Value &owner_account_json = data_json["ownerAccount"];
        if(owner_account_json.isObject()) {
            const Json::Value &avatar_json = owner_account_json["avatar"];
            if(avatar_json.isObject()) {
                const Json::Value &path_json = avatar_json["path"];
                if(path_json.isString()) {
                    body_item->thumbnail_url = server + path_json.asString();
                    body_item->thumbnail_size = { 130, 130 };
                }
            }
        }

        const Json::Value &thumbnail_path_json = data_json["thumbnailPath"];
        if(thumbnail_path_json.isString()) {
            body_item->thumbnail_url = server + thumbnail_path_json.asString();
            body_item->thumbnail_size = { 280, 153 };
        }

        if(search_type == PeertubeSearchPage::SearchType::VIDEO_CHANNELS && body_item->thumbnail_url.empty()) {
            body_item->thumbnail_url = server + "/client/assets/images/default-avatar-videochannel.png";
            body_item->thumbnail_size = { 130, 130 };
        }

        return body_item;
    }

    PluginResult PeertubeSearchPage::get_page(const std::string &str, int page, BodyItems &result_items) {
        if(str.empty())
            return get_local_videos(page, result_items);

        // TODO: Parallel
        PluginResult result;

        result = get_page_by_type(SearchType::VIDEO_CHANNELS, str, page, 10, result_items);
        if(result != PluginResult::OK) return result;

        result = get_page_by_type(SearchType::VIDEO_PLAYLISTS, str, page, 10, result_items);
        if(result != PluginResult::OK) return result;

        result = get_page_by_type(SearchType::VIDEOS, str, page, 10, result_items);
        if(result != PluginResult::OK) return result;

        return PluginResult::OK;
    }

    // Returns true if the error was handled (if there was an error)
    static bool handle_error(const Json::Value &json_root, std::string &err_str) {
        if(!json_root.isObject())
            return false;

        const Json::Value &status_json = json_root["status"];
        const Json::Value &detail_json = json_root["detail"];
        if(status_json.isInt() && detail_json.isString()) {
            err_str = detail_json.asString();
            return true;
        }

        return false;
    }

    static PluginResult videos_request(Page *page, const std::string &url, const std::string &server, PeertubeSearchPage::SearchType search_type, BodyItems &result_items) {
        Json::Value json_root;
        std::string err_msg;
        DownloadResult result = page->download_json(json_root, url, {}, true, &err_msg);
        if(result != DownloadResult::OK) return download_result_to_plugin_result(result);

        // Return OK because some versions of peertube doesn't support video-playlists api (or is it not enabled for the instance?) and in such cases it returns
        // an empty string
        if(!json_root.isObject())
            return PluginResult::OK;

        std::string err_str;
        if(handle_error(json_root, err_str)) {
            show_notification("QuickMedia", "Peertube server returned an error: " + err_str, Urgency::CRITICAL);
            return PluginResult::ERR;
        }

        const Json::Value &data_array_json = json_root["data"];
        if(data_array_json.isArray()) {
            for(const Json::Value &data_json : data_array_json) {
                const Json::Value &video_json = data_json["video"];
                auto body_item = search_data_to_body_item(video_json.isObject() ? video_json : data_json, server, search_type);
                if(body_item)
                    result_items.push_back(std::move(body_item));
            }
        }

        return PluginResult::OK;
    }

    PluginResult PeertubeSearchPage::get_local_videos(int page, BodyItems &result_items) {
        char url[2048];
        snprintf(url, sizeof(url), "%s/api/v1/videos/?start=%d&count=%d&sort=-publishedAt&filter=local&skipCount=true", server.c_str(), page * 20, 20);
        return videos_request(this, url, server, SearchType::VIDEOS, result_items);
    }

    PluginResult PeertubeSearchPage::get_page_by_type(SearchType search_type, const std::string &str, int page, int count, BodyItems &result_items) {
        char url[2048];
        snprintf(url, sizeof(url), "%s/api/v1/search/%s?start=%d&count=%d&search=%s&searchTarget=local", server.c_str(), search_type_to_string(search_type), page * count, count, url_param_encode(str).c_str());
        return videos_request(this, url, server, search_type, result_items);
    }

    PluginResult PeertubeSearchPage::submit(const std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        const SearchType search_type = (SearchType)(uintptr_t)submit_body_item->userdata;
        if(search_type == SearchType::VIDEO_CHANNELS) {
            result_tabs.push_back(Tab{ create_body(false, true), std::make_unique<PeertubeChannelPage>(program, server, title, url), nullptr });
        } else if(search_type == SearchType::VIDEO_PLAYLISTS) {
            result_tabs.push_back(Tab{ create_body(false, true), std::make_unique<PeertubePlaylistPage>(program, server, title, url), nullptr });
        } else if(search_type == SearchType::VIDEOS) {
            result_tabs.push_back(Tab{ nullptr, std::make_unique<PeertubeVideoPage>(program, server, url, false), nullptr });
        }
        return PluginResult::OK;
    }

    PluginResult PeertubeSearchPage::lazy_fetch(BodyItems &result_items) {
        return get_local_videos(0, result_items);
    }

    PluginResult PeertubeChannelPage::get_page(const std::string&, int page, BodyItems &result_items) {
        char url[2048];
        snprintf(url, sizeof(url), "%s/api/v1/video-channels/%s/videos?start=%d&count=%d&sort=-publishedAt", server.c_str(), name.c_str(), page * 20, 20);
        return videos_request(this, url, server, PeertubeSearchPage::SearchType::VIDEOS, result_items);
    }

    PluginResult PeertubeChannelPage::submit(const std::string&, const std::string &url, std::vector<Tab> &result_tabs) {
        result_tabs.push_back(Tab{ nullptr, std::make_unique<PeertubeVideoPage>(program, server, url, false), nullptr });
        return PluginResult::OK;
    }

    PluginResult PeertubeChannelPage::lazy_fetch(BodyItems &result_items) {
        return get_page("", 0, result_items);
    }

    PluginResult PeertubePlaylistPage::get_page(const std::string&, int page, BodyItems &result_items) {
        char url[2048];
        snprintf(url, sizeof(url), "%s/api/v1/video-playlists/%s/videos?start=%d&count=%d", server.c_str(), uuid.c_str(), page * 20, 20);
        return videos_request(this, url, server, PeertubeSearchPage::SearchType::VIDEOS, result_items);
    }

    PluginResult PeertubePlaylistPage::submit(const std::string&, const std::string &url, std::vector<Tab> &result_tabs) {
        result_tabs.push_back(Tab{ nullptr, std::make_unique<PeertubeVideoPage>(program, server, url, true), nullptr });
        return PluginResult::OK;
    }

    PluginResult PeertubePlaylistPage::lazy_fetch(BodyItems &result_items) {
        return get_page("", 0, result_items);
    }

    static std::string get_ext_from_url(const std::string &url) {
        const size_t dot_index = url.rfind('.');
        if(dot_index == std::string::npos)
            return "";
        return url.substr(dot_index);
    }

    std::string PeertubeVideoPage::get_download_url(int max_height) {
        bool has_embedded_audio;
        std::string ext;
        return get_video_url(max_height, has_embedded_audio, ext);
    }

    std::string PeertubeVideoPage::get_video_url(int max_height, bool &has_embedded_audio, std::string &ext) {
        has_embedded_audio = true;

        for(const PeertubeVideoPage::VideoSource &video_source : video_sources) {
            if(video_source.resolution <= max_height) {
                ext = get_ext_from_url(video_source.url);
                return video_source.url;
            }
        }

        if(!video_sources.empty()) {
            ext = get_ext_from_url(video_sources.front().url);
            return video_sources.front().url;
        }
        
        return "";
    }

    std::string PeertubeVideoPage::get_audio_url(std::string&) {
        // TODO: Return when audio only mode is enabled
        return "";
    }

    // TODO: Download video using torrent and seed it to at least 2x ratio
    static bool files_get_sources(const Json::Value &files_json, std::vector<PeertubeVideoPage::VideoSource> &video_sources) {
        if(!files_json.isArray())
            return false;

        for(const Json::Value &file_json : files_json) {
            if(!file_json.isObject())
                continue;

            const Json::Value &file_download_url_json = file_json["fileDownloadUrl"];
            if(!file_download_url_json.isString())
                continue;

            PeertubeVideoPage::VideoSource video_source;
            video_source.url = file_download_url_json.asString();
            video_source.resolution = 0;

            const Json::Value &resolution_json = file_json["resolution"];
            if(resolution_json.isObject()) {
                const Json::Value &id_json = resolution_json["id"];
                if(id_json.isInt())
                    video_source.resolution = id_json.asInt();
            }

            video_sources.push_back(std::move(video_source));
        }

        // TODO: Also sort by fps
        std::sort(video_sources.begin(), video_sources.end(), [](const PeertubeVideoPage::VideoSource &source1, const PeertubeVideoPage::VideoSource &source2) {
            return source1.resolution > source2.resolution;
        });

        return !video_sources.empty();
    }

    // TODO: Media chapters
    PluginResult PeertubeVideoPage::load(std::string &title, std::string &channel_url, std::vector<MediaChapter>&, std::string &err_str) {
        Json::Value json_root;
        std::string err_msg;
        DownloadResult download_result = download_json(json_root, server + "/api/v1/videos/" + url, {}, true, &err_msg);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        if(!json_root.isObject())
            return PluginResult::ERR;

        if(handle_error(json_root, err_str))
            return PluginResult::ERR;

        const Json::Value &name_json = json_root["name"];
        if(name_json.isString())
            title = name_json.asString();

        const Json::Value &channel_json = json_root["channel"];
        if(channel_json.isObject()) {
            const Json::Value &channel_url_json = channel_json["url"];
            if(channel_url_json.isString())
                channel_url = channel_url_json.asString();
        }

        video_sources.clear();
        if(!files_get_sources(json_root["files"], video_sources)) {
            const Json::Value &streaming_playlists_json = json_root["streamingPlaylists"];
            if(!streaming_playlists_json.isArray())
                return PluginResult::ERR;

            for(const Json::Value &streaming_playlist_json : streaming_playlists_json) {
                if(!streaming_playlist_json.isObject())
                    continue;
#if 0
                files_get_sources(streaming_playlist_json["files"], video_sources);
#else
                const Json::Value &playlist_url_json = streaming_playlist_json["playlistUrl"];
                if(!playlist_url_json.isString())
                    continue;

                PeertubeVideoPage::VideoSource video_source;
                video_source.url = playlist_url_json.asString();
                video_source.resolution = 0;
                video_sources.push_back(std::move(video_source));
                break;
#endif
            }

            if(video_sources.empty())
                return PluginResult::ERR;
        }

        return PluginResult::OK;
    }
}