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path: root/src/plugins/Mangadex.cpp
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#include "../../plugins/Mangadex.hpp"
#include "../../include/Utils.hpp"
#include "../../include/Theme.hpp"
#include "../../include/Config.hpp"
#include <json/writer.h>

namespace QuickMedia {
    static std::string relationships_get_cover_art_filename(const Json::Value &relationships_json) {
        std::string result;
        if(!relationships_json.isArray())
            return result;

        for(const Json::Value &relationship_json : relationships_json) {
            if(!relationship_json.isObject())
                continue;

            const Json::Value &relationship_type_json = relationship_json["type"];
            if(!relationship_type_json.isString() || strcmp(relationship_type_json.asCString(), "cover_art") != 0)
                continue;

            const Json::Value &attributes_json = relationship_json["attributes"];
            if(!attributes_json.isObject())
                continue;

            const Json::Value &file_name_json = attributes_json["fileName"];
            if(!file_name_json.isString())
                continue;

            result = file_name_json.asString();
            break;
        }

        return result;
    }

    static void add_tags(const Json::Value &tags_json, BodyItem *body_item) {
        if(!tags_json.isArray())
            return;

        for(const Json::Value &tag_json : tags_json) {
            if(!tag_json.isObject())
                continue;

            const Json::Value &attributes_json = tag_json["attributes"];
            if(!attributes_json.isObject())
                continue;

            const Json::Value &name_json = attributes_json["name"];
            if(!name_json.isObject())
                continue;

            const Json::Value &en_name_json = name_json["en"];
            if(!en_name_json.isString())
                continue;

            body_item->add_reaction(en_name_json.asString(), nullptr);
        }
    }

    enum class SearchType {
        TITLE,
        AUTHOR
    };

    static PluginResult search_manga(Page *plugin_page, SearchType search_type, const std::string &query, int page, BodyItems &result_items) {
        std::string url = "https://api.mangadex.org/manga?limit=20&order[relevance]=desc&includes[]=cover_art&offset=" + std::to_string(page * 20) + "&contentRating[]=safe&contentRating[]=suggestive&contentRating[]=erotica";
        if(get_config().mangadex.allow_hentai)
            url += "&contentRating[]=pornographic";

        const std::string query_encoded = url_param_encode(query);
        switch(search_type) {
            case SearchType::TITLE:
                url += "&title=" + query_encoded;
                break;
            case SearchType::AUTHOR:
                url += "&authorOrArtist=" + query_encoded;
                break;
        }

        Json::Value json_root;
        if(plugin_page->download_json(json_root, url, {}, true) != DownloadResult::OK)
            return PluginResult::NET_ERR;

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

        const Json::Value &result_json = json_root["result"];
        if(!result_json.isString() || strcmp(result_json.asCString(), "ok") != 0)
            return PluginResult::ERR;

        const Json::Value &data_list_json = json_root["data"];
        if(!data_list_json.isArray())
            return PluginResult::ERR;

        for(const Json::Value &data_json : data_list_json) {
            if(!data_json.isObject())
                continue;
            
            const Json::Value &id_json = data_json["id"];
            if(!id_json.isString())
                continue;

            const Json::Value &attributes_json = data_json["attributes"];
            if(!attributes_json.isObject())
                continue;

            const Json::Value &title_json = attributes_json["title"];
            if(!title_json.isObject())
                continue;

            std::string title;
            const Json::Value &title_en_json = title_json["en"];
            const Json::Value &title_ja_json = title_json["ja"];
            if(title_en_json.isString())
                title = title_en_json.asString();
            else if(title_ja_json.isString())
                title = title_ja_json.asString();
            else
                title = "No title"; // TODO: Verify if this happens. If it happens, get the title in any available language

            auto body_item = BodyItem::create(std::move(title));
            body_item->url = id_json.asString();

            std::string description;

            const Json::Value &status_json = attributes_json["status"];
            if(status_json.isString()) {
                if(!description.empty())
                    description += '\n';
                description += "Status: " + status_json.asString();
            }

            const Json::Value &description_json = attributes_json["description"];
            if(description_json.isObject()) {
                const Json::Value &en_json = description_json["en"];
                if(en_json.isString()) {
                    if(!description.empty())
                        description += '\n';
                    description += en_json.asString();
                }
            }

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

            add_tags(attributes_json["tags"], body_item.get());

            std::string cover_art_filename = relationships_get_cover_art_filename(data_json["relationships"]);
            if(!cover_art_filename.empty())
                body_item->thumbnail_url = "https://uploads.mangadex.org/covers/" + body_item->url + "/" + std::move(cover_art_filename) + ".256.jpg";
            body_item->thumbnail_size = {101, 141};
            result_items.push_back(std::move(body_item));
        }

        return PluginResult::OK;
    }

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

        return plugin_result_to_search_result(search_manga(this, SearchType::TITLE, str, 0, result_items));
    }

    PluginResult MangadexSearchPage::get_page(const std::string &str, int page, BodyItems &result_items) {
        return search_manga(this, SearchType::TITLE, str, page, result_items);
    }

    static PluginResult get_chapters_for_manga(Page *page, const std::string &manga_id, int page_num, BodyItems &result_items) {
        std::string url = "https://api.mangadex.org/manga/" + manga_id + "/feed?order[chapter]=desc&limit=100&translatedLanguage[]=en&offset=" + std::to_string(page_num * 100) + "&contentRating[]=safe&contentRating[]=suggestive&contentRating[]=erotica";
        if(get_config().mangadex.allow_hentai)
            url += "&contentRating[]=pornographic";

        Json::Value json_root;
        if(page->download_json(json_root, url, {}, true) != DownloadResult::OK)
            return PluginResult::NET_ERR;

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

        const Json::Value &result_json = json_root["result"];
        if(!result_json.isString() || strcmp(result_json.asCString(), "ok") != 0)
            return PluginResult::ERR;

        const Json::Value &data_list_json = json_root["data"];
        if(!data_list_json.isArray())
            return PluginResult::ERR;

        std::string prev_chapter;
        std::string chapter;
        for(const Json::Value &data_json : data_list_json) {
            if(!data_json.isObject())
                continue;

            const Json::Value &id_json = data_json["id"];
            if(!id_json.isString())
                continue;

            const Json::Value &attributes_json = data_json["attributes"];
            if(!attributes_json.isObject())
                continue;

            const Json::Value &translated_language_json = attributes_json["translatedLanguage"];
            if(!translated_language_json.isString() || strcmp(translated_language_json.asCString(), "en") != 0)
                continue;

            const Json::Value &chapter_json = attributes_json["chapter"];
            if(chapter_json.isString())
                chapter = chapter_json.asString();
            else
                chapter = "0";

            if(strcmp(prev_chapter.c_str(), chapter.c_str()) == 0)
                continue;

            std::string title = "Ch. " + chapter;
            prev_chapter = std::move(chapter);
            const Json::Value &title_json = attributes_json["title"];
            if(title_json.isString() && title_json.asCString()[0] != '\0')
                title += " - " + title_json.asString();

            auto body_item = BodyItem::create(std::move(title));
            body_item->url = id_json.asString();

            const Json::Value &publish_at_json = attributes_json["publishAt"];
            if(publish_at_json.isString()) {
                time_t unix_time = iso_utc_to_unix_time(publish_at_json.asCString());
                if(unix_time != 0) {
                    body_item->set_description("Uploaded: " + unix_time_to_local_time_str(unix_time));
                    body_item->set_description_color(get_theme().faded_text_color);
                }
            }

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

        return PluginResult::OK;
    }

    static void get_creators(const Json::Value &relationships_json, std::vector<Creator> &creators) {
        if(!relationships_json.isArray())
            return;

        for(const Json::Value &relationship_json : relationships_json) {
            if(!relationship_json.isObject())
                continue;

            const Json::Value &id_json = relationship_json["id"];
            if(!id_json.isString())
                continue;

            const Json::Value &type_json = relationship_json["type"];
            if(!type_json.isString() || (strcmp(type_json.asCString(), "author") != 0 && strcmp(type_json.asCString(), "artist") != 0))
                continue;

            const Json::Value &attributes_json = relationship_json["attributes"];
            if(!attributes_json.isObject())
                continue;

            const Json::Value &name_json = attributes_json["name"];
            if(!name_json.isString())
                continue;

            Creator creator;
            creator.name = name_json.asString();
            creator.url = id_json.asString();
            creator.creator_type = strcmp(type_json.asCString(), "author") == 0 ? CreatorType::AUTHOR : CreatorType::ARTIST;
            creators.push_back(std::move(creator));
        }
    }

    static PluginResult get_creators_for_manga(Page *page, const std::string &manga_id, std::vector<Creator> &creators) {
        std::string request_url = "https://api.mangadex.org/manga/" + manga_id + "?includes[]=artist&includes[]=author";

        Json::Value json_root;
        if(page->download_json(json_root, request_url, {}, true) != DownloadResult::OK)
            return PluginResult::NET_ERR;

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

        const Json::Value &result_json = json_root["result"];
        if(!result_json.isString() || strcmp(result_json.asCString(), "ok") != 0)
            return PluginResult::ERR;

        const Json::Value &data_json = json_root["data"];
        if(!data_json.isObject())
            return PluginResult::ERR;

        get_creators(data_json["relationships"], creators);
        return PluginResult::OK;
    }

    static void remove_duplicate_creators(std::vector<Creator> &creators) {
        std::sort(creators.begin(), creators.end(), [](const Creator &creator1, const Creator &creator2) {
            return creator1.name < creator2.name;
        });
        creators.erase(
            std::unique(creators.begin(), creators.end(), [](const Creator &creator1, const Creator &creator2) {
                return creator1.name == creator2.name;
            }),
            creators.end());
    }

    // TODO: Do requests in parallel
    PluginResult MangadexSearchPage::submit(const SubmitArgs &args, std::vector<Tab> &result_tabs) {
        PluginResult result;

        BodyItems body_items;
        result = get_chapters_for_manga(this, args.url, 0, body_items);
        if(result != PluginResult::OK)
            return result;

        auto body = create_body();
        body->set_items(std::move(body_items));
        auto chapters_page = std::make_unique<MangadexChaptersPage>(program, this, args.title, args.url, args.thumbnail_url);
        result_tabs.push_back(Tab{std::move(body), std::move(chapters_page), create_search_bar("Search...", SEARCH_DELAY_FILTER)});

        std::vector<Creator> creators;
        result = get_creators_for_manga(this, args.url, creators);
        if(result != PluginResult::OK)
            return result;

        remove_duplicate_creators(creators);
        for(Creator &creator : creators) {
            result_tabs.push_back(Tab{create_body(), std::make_unique<MangadexCreatorPage>(program, this, std::move(creator)), create_search_bar("Search...", SEARCH_DELAY_FILTER)});
        }

        return PluginResult::OK;
    }

    PluginResult MangadexChaptersPage::submit(const SubmitArgs &args, std::vector<Tab> &result_tabs) {
        result_tabs.push_back(Tab{nullptr, std::make_unique<MangadexImagesPage>(program, search_page, content_title, args.url, args.title, thumbnail_url), nullptr});
        return PluginResult::OK;
    }

    PluginResult MangadexChaptersPage::get_page(const std::string&, int page, BodyItems &result_items) {
        return get_chapters_for_manga(this, content_url, page, result_items);
    }

    PluginResult MangadexCreatorPage::submit(const SubmitArgs &args, std::vector<Tab> &result_tabs) {
        return search_page->submit(args, result_tabs);
    }

    PluginResult MangadexCreatorPage::get_page(const std::string&, int page, BodyItems &result_items) {
        return search_manga(this, SearchType::AUTHOR, creator.url, page, result_items);
    }

    PluginResult MangadexCreatorPage::lazy_fetch(BodyItems &result_items) {
        return search_manga(this, SearchType::AUTHOR, creator.url, 0, result_items);
    }

    bool MangadexChaptersPage::extract_id_from_url(const std::string &url, std::string &manga_id) const {
        size_t start_index = url.find("manga=");
        if(start_index == std::string::npos) {
            manga_id = url;
            return true;
        }

        start_index += 6;
        size_t end_index = url.find('&', start_index);
        if(end_index == std::string::npos) {
            manga_id = url.substr(start_index);
            return true;
        }
        
        manga_id = url.substr(start_index, end_index - start_index);
        return true;
    }

    ImageResult MangadexImagesPage::update_image_urls(int &num_images) {
        num_images = 0;

        Json::Value json_root;
        // TODO: If this fails, call this again to retrieve another server. Also do the same for automedia
        if(download_json(json_root, "https://api.mangadex.org/at-home/server/" + url, {}, true) != DownloadResult::OK)
            return ImageResult::NET_ERR;

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

        const Json::Value &result_json = json_root["result"];
        if(!result_json.isString() || strcmp(result_json.asCString(), "ok") != 0)
            return ImageResult::ERR;

        const Json::Value &base_url_json = json_root["baseUrl"];
        if(!base_url_json.isString())
            return ImageResult::ERR;

        const Json::Value &chapter_json = json_root["chapter"];
        if(!chapter_json.isObject())
            return ImageResult::ERR;

        const Json::Value &hash_json = chapter_json["hash"];
        if(!hash_json.isString())
            return ImageResult::ERR;

        const Json::Value &data_json = chapter_json["data"];
        if(!data_json.isArray())
            return ImageResult::ERR;

        std::string base_url = base_url_json.asString();
        if(!base_url.empty() && base_url.back() != '/')
            base_url += '/';

        const std::string hash_str = hash_json.asString();
        for(const Json::Value &data_item_json : data_json) {
            if(!data_item_json.isString())
                continue;
            chapter_image_urls.push_back(base_url + "data/" + hash_str + "/" + data_item_json.asString());
        }

        num_images = chapter_image_urls.size();
        return ImageResult::OK;
    }

    ImageResult MangadexImagesPage::for_each_page_in_chapter(PageCallback callback) {
        for(const std::string &url : chapter_image_urls) {
            if(!callback(url))
                break;
        }
        return ImageResult::OK;
    }
}