path: root/src/plugins/Mangadex.cpp

#include "../../plugins/Mangadex.hpp"
#include "../../include/Utils.hpp"
#include "../../include/Theme.hpp"
#include <json/writer.h>

namespace QuickMedia {
    PluginResult legacy_mangadex_id_to_new_manga_id(Page *page, const std::vector<int> &manga_ids, std::vector<std::pair<int, std::string>> &new_manga_ids) {
        Json::Value request_json(Json::objectValue);
        request_json["type"] = "manga";
        Json::Value manga_ids_json(Json::arrayValue);
        for(int manga_id : manga_ids) {
            manga_ids_json.append(manga_id);
        }
        request_json["ids"] = std::move(manga_ids_json);

        Json::StreamWriterBuilder json_builder;
        json_builder["commentStyle"] = "None";
        json_builder["indentation"] = "";

        std::vector<CommandArg> additional_args = {
            { "-X", "POST" },
            { "-H", "content-type: application/json" },
            { "--data-binary", Json::writeString(json_builder, request_json) }
        };

        Json::Value json_root;
        if(page->download_json(json_root, "https://api.mangadex.org/legacy/mapping", std::move(additional_args), true) != DownloadResult::OK)
            return PluginResult::NET_ERR;

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

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

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

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

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

            const Json::Value &legacy_id_json = attributes_json["legacyId"];
            if(!legacy_id_json.isInt())
                continue;

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

            new_manga_ids.push_back(std::make_pair<int, std::string>(legacy_id_json.asInt(), new_id_json.asString()));
        }

        return PluginResult::OK;
    }
    
    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);
        const std::string query_encoded = url_param_encode(query);
        switch(search_type) {
            case SearchType::TITLE:
                url += "&title=" + query_encoded;
                break;
            case SearchType::AUTHOR:
                url += "&authors[]=" + query_encoded;
                url += "&artists[]=" + 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"];
            if(title_en_json.isString())
                title = title_en_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) {
        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, ChapterImageUrls &chapter_image_urls) {
        std::string request_url = "https://api.mangadex.org/manga/" + manga_id + "/feed?order[chapter]=desc&limit=100&translatedLanguage[]=en&offset=" + std::to_string(page_num * 100);

        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_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;

            const Json::Value &hash_json = attributes_json["hash"];
            if(!hash_json.isString())
                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();

            const Json::Value &attributes_data_json = attributes_json["data"];
            if(!attributes_data_json.isArray())
                continue;

            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);
                }
            }

            std::vector<std::string> image_urls;
            image_urls.reserve(attributes_data_json.size());
            for(const Json::Value &data_item_json : attributes_data_json) {
                if(!data_item_json.isString())
                    continue;

                std::string url = hash_json.asString() + "/" + data_item_json.asString();
                image_urls.push_back(std::move(url));
            }
            chapter_image_urls[body_item->url] = std::move(image_urls);

            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 std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        PluginResult result;

        BodyItems body_items;
        ChapterImageUrls chapter_image_urls;
        result = get_chapters_for_manga(this, url, 0, body_items, chapter_image_urls);
        if(result != PluginResult::OK)
            return result;
        auto body = create_body();
        body->set_items(std::move(body_items));
        result_tabs.push_back(Tab{std::move(body), std::make_unique<MangadexChaptersPage>(program, this, title, url, std::move(chapter_image_urls)), create_search_bar("Search...", SEARCH_DELAY_FILTER)});

        std::vector<Creator> creators;
        result = get_creators_for_manga(this, 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 std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        result_tabs.push_back(Tab{nullptr, std::make_unique<MangadexImagesPage>(program, search_page, content_title, url, title, &chapter_image_urls), 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, chapter_image_urls);
    }

    PluginResult MangadexCreatorPage::submit(const std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        return search_page->submit(title, url, 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::get_number_of_images(int &num_images) {
        num_images = 0;
        ImageResult image_result = get_image_urls_for_chapter(url);
        if(image_result != ImageResult::OK) return image_result;
        num_images = chapter_image_urls.size();
        return ImageResult::OK;
    }

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

    ImageResult MangadexImagesPage::get_image_urls_for_chapter(const std::string &url) {
        if(!chapter_image_urls.empty())
            return ImageResult::OK;

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

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

        auto it = chapter_image_url_templates->find(url);
        if(it == chapter_image_url_templates->end())
            return ImageResult::ERR;

        chapter_image_urls.resize(it->second.size());
        for(size_t i = 0; i < it->second.size(); ++i) {
            chapter_image_urls[i] = base_url + "data/" + it->second[i];
        }

        return ImageResult::OK;
    }
}