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path: root/src/plugins/Mangadex.cpp
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#include "../../plugins/Mangadex.hpp"
#include "../../include/Utils.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::shared_ptr<BodyItem> relationship_get_body_item(const Json::Value &json, BodyItems &body_items) {
        for(const Json::Value &item_json : json) {
            if(!item_json.isObject())
                continue;

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

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

            std::string id_str = id_json.asString();
            auto it = std::find_if(body_items.begin(), body_items.end(), [&id_str](const std::shared_ptr<BodyItem> &body_item) {
                return body_item->url == id_str;
            });

            if(it == body_items.end())
                continue;

            return *it;
        }
        return nullptr;
    }

    PluginResult MangadexSearchPage::get_cover_urls(BodyItems &body_items) {
        std::string url = "https://api.mangadex.org/cover?";
        for(size_t i = 0; i < body_items.size(); ++i) {
            if(i > 0)
                url += "&";
            url += "manga[]=" + body_items[i]->url;
        }

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

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

        const Json::Value &results_json = json_root["results"];
        if(!results_json.isArray())
            return PluginResult::OK;

        std::shared_ptr<BodyItem> body_item;
        for(const Json::Value &result_item_json : results_json) {
            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 &relationships_json = result_item_json["relationships"];
            if(!relationships_json.isArray())
                continue;

            body_item = relationship_get_body_item(relationships_json, body_items);
            if(!body_item)
                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 &filename_json = attributes_json["fileName"];
            if(!filename_json.isString())
                continue;

            body_item->thumbnail_url = "https://uploads.mangadex.org/covers/" + body_item->url + "/" + filename_json.asString() + ".256.jpg";
        }

        return PluginResult::OK;
    }

    SearchResult MangadexSearchPage::search(const std::string &str, int page, BodyItems &result_items) {
        std::string url = "https://api.mangadex.org/manga?title=" + url_param_encode(str) + "&limit=20&offset=" + std::to_string(page * 20);

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

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

        const Json::Value &results_json = json_root["results"];
        if(!results_json.isArray())
            return SearchResult::OK;

        for(const Json::Value &result_item_json : results_json) {
            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 &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();
            result_items.push_back(std::move(body_item));
        }

        // Intentionally ignore errors. This api shouldn't fail if we fail to get covers
        get_cover_urls(result_items);

        return SearchResult::OK;
    }

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

    PluginResult MangadexSearchPage::get_page(const std::string &str, int page, BodyItems &result_items) {
        return search_result_to_plugin_result(search(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 &results_json = json_root["results"];
        if(!results_json.isArray())
            return PluginResult::OK;

        const char *prev_chapter = nullptr;
        for(const Json::Value &result_item_json : results_json) {
            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 &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())
                continue;

            if(prev_chapter && strcmp(prev_chapter, chapter_json.asCString()) == 0)
                continue;

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

            prev_chapter = chapter_json.asCString();
            std::string title = "Ch. " + chapter_json.asString();
            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(sf::Color(179, 179, 179));
                }
            }

            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;
    }

    PluginResult MangadexSearchPage::submit(const std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        chapter_image_urls.clear();
        auto body = create_body();
        get_chapters_for_manga(this, url, 0, body->items, chapter_image_urls);
        result_tabs.push_back(Tab{std::move(body), std::make_unique<MangadexChaptersPage>(program, this, title, url), 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), 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, search_page->chapter_image_urls);
    }

    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 = search_page->chapter_image_urls.find(url);
        if(it == search_page->chapter_image_urls.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;
    }
}