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path: root/src/plugins/Mangatown.cpp
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#include "../../plugins/Mangatown.hpp"
#include "../../include/Notification.hpp"
#include "../../include/StringUtils.hpp"
#include "../../include/NetUtils.hpp"
#include <quickmedia/HtmlSearch.h>

static const std::string mangatown_url = "https://www.mangatown.com";

namespace QuickMedia {
    static bool is_number_with_zero_fill(const char *str) {
        while(*str == '0') { ++str; }
        return atoi(str) != 0;
    }

    static SearchResult search_page(const std::string &str, int page, BodyItems &result_items) {
        std::string url = "https://www.mangatown.com/search?name=";
        url += url_param_encode(str);
        url += "&page=" + std::to_string(page);

        std::string website_data;
        if(download_to_string(url, website_data, {}, true) != DownloadResult::OK)
            return SearchResult::NET_ERR;

        if(website_data.empty())
            return SearchResult::OK;

        QuickMediaHtmlSearch html_search;
        int result = quickmedia_html_search_init(&html_search, website_data.c_str());
        if(result != 0)
            goto cleanup;

        result = quickmedia_html_find_nodes_xpath(&html_search, "//p[class='title']/a",
            [](QuickMediaHtmlNode *node, void *userdata) {
                auto *item_data = (BodyItems*)userdata;
                const char *href = quickmedia_html_node_get_attribute_value(node, "href");
                const char *title = quickmedia_html_node_get_attribute_value(node, "title");
                if(href && title && strncmp(href, "/manga/", 7) == 0) {
                    auto item = BodyItem::create(strip(title));
                    item->url = mangatown_url + strip(href);
                    item_data->push_back(std::move(item));
                }
            }, &result_items);

        BodyItemContext body_item_image_context;
        body_item_image_context.body_items = &result_items;
        body_item_image_context.index = 0;

        result = quickmedia_html_find_nodes_xpath(&html_search, "//a[class='manga_cover']/img",
            [](QuickMediaHtmlNode *node, void *userdata) {
                auto *item_data = (BodyItemContext*)userdata;
                const char *src = quickmedia_html_node_get_attribute_value(node, "src");
                if(src && item_data->index < item_data->body_items->size()) {
                    (*item_data->body_items)[item_data->index]->thumbnail_url = src;
                    item_data->index++;
                }
            }, &body_item_image_context);

        cleanup:
        quickmedia_html_search_deinit(&html_search);
        return SearchResult::OK;
    }

    SearchResult MangatownSearchPage::search(const std::string &str, BodyItems &result_items) {
        return search_page(str, 1, result_items);
    }

    PluginResult MangatownSearchPage::get_page(const std::string &str, int page, BodyItems &result_items) {
        return search_result_to_plugin_result(search_page(str, 1 + page, result_items));
    }

    PluginResult MangatownSearchPage::submit(const std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        BodyItems chapters_items;

        std::string website_data;
        if(download_to_string(url, website_data, {}, true) != DownloadResult::OK)
            return PluginResult::NET_ERR;

        QuickMediaHtmlSearch html_search;
        int result = quickmedia_html_search_init(&html_search, website_data.c_str());
        if(result != 0)
            goto cleanup;

        result = quickmedia_html_find_nodes_xpath(&html_search, "//ul[class='chapter_list']//a",
            [](QuickMediaHtmlNode *node, void *userdata) {
                auto *item_data = (BodyItems*)userdata;
                const char *href = quickmedia_html_node_get_attribute_value(node, "href");
                const char *text = quickmedia_html_node_get_text(node);
                if(href && text && strncmp(href, "/manga/", 7) == 0) {
                    auto item = BodyItem::create(strip(text));
                    item->url = mangatown_url + strip(href);
                    item_data->push_back(std::move(item));
                }
            }, &chapters_items);

        BodyItemContext body_item_context;
        body_item_context.body_items = &chapters_items;
        body_item_context.index = 0;

        quickmedia_html_find_nodes_xpath(&html_search, "//ul[class='chapter_list']//span[class='time']",
            [](QuickMediaHtmlNode *node, void *userdata) {
                auto *item_data = (BodyItemContext*)userdata;
                const char *text = quickmedia_html_node_get_text(node);
                if(text && item_data->index < item_data->body_items->size()) {
                    std::string uploaded_date = strip(text);
                    (*item_data->body_items)[item_data->index]->set_description("Uploaded: " + uploaded_date);
                    item_data->index++;
                }
            }, &body_item_context);

        cleanup:
        quickmedia_html_search_deinit(&html_search);
        if(result != 0)
            return PluginResult::ERR;

        auto body = create_body();
        body->items = std::move(chapters_items);
        result_tabs.push_back(Tab{std::move(body), std::make_unique<MangatownChaptersPage>(program, title, url), create_search_bar("Search...", SEARCH_DELAY_FILTER)});
        return PluginResult::OK;
    }

    PluginResult MangatownChaptersPage::submit(const std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        result_tabs.push_back(Tab{nullptr, std::make_unique<MangatownImagesPage>(program, content_title, title, url), nullptr});
        return PluginResult::OK;
    }

    bool MangatownChaptersPage::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)
            return false;
        
        start_index += 7;
        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;
    }

    // First page = 0
    static std::string first_image_url_to_page_image_url(const std::string &image_url, int page) {
        size_t slash_index = image_url.rfind('/');
        if(slash_index == std::string::npos)
            return "";

        size_t dot_index = image_url.rfind('.');
        if(dot_index == std::string::npos || dot_index <= slash_index)
            return "";

        std::string filename_without_ext = image_url.substr(slash_index + 1, dot_index - (slash_index + 1));
        if(!filename_without_ext.empty() && filename_without_ext.back() == '1')
            ++page;

        std::string page_str = std::to_string(page);
        if(page_str.size() > filename_without_ext.size())
            return "";

        filename_without_ext.replace(filename_without_ext.size() - page_str.size(), page_str.size(), page_str);
        return image_url.substr(0, slash_index) + '/' + filename_without_ext + image_url.substr(dot_index);
    }

    ImageResult MangatownImagesPage::get_page_image_urls(std::vector<std::string> &urls) {
        std::string image_src;
        int num_pages = 0;

        std::string website_data;
        if(download_to_string(url, website_data, {}, true) != DownloadResult::OK)
            return ImageResult::NET_ERR;

        QuickMediaHtmlSearch html_search;
        int result = quickmedia_html_search_init(&html_search, website_data.c_str());
        if(result != 0)
            goto cleanup;

        result = quickmedia_html_find_nodes_xpath(&html_search, "//div[id='viewer']//img",
            [](QuickMediaHtmlNode *node, void *userdata) {
                std::string *image_src = (std::string*)userdata;
                const char *src = quickmedia_html_node_get_attribute_value(node, "src");
                if(src && strstr(src, "/store/manga/")) {
                    if(strncmp(src, "//", 2) == 0)
                        *image_src = strip(src + 2);
                    else
                        *image_src = strip(src);
                }
            }, &image_src);

        if(result != 0 || image_src.empty())
            goto cleanup;

        result = quickmedia_html_find_nodes_xpath(&html_search, "//div[class='page_select']//option",
            [](QuickMediaHtmlNode *node, void *userdata) {
                int *last_num_pages = (int*)userdata;
                const char *value = quickmedia_html_node_get_attribute_value(node, "value");
                const char *text = quickmedia_html_node_get_text(node);
                if(value && strncmp(value, "/manga/", 7) == 0) {
                    if(is_number_with_zero_fill(text)) {
                        (*last_num_pages)++;
                    }
                }
            }, &num_pages);

        num_pages /= 2;

        cleanup:
        quickmedia_html_search_deinit(&html_search);
        if(result != 0 || image_src.empty() || num_pages == 0)
            return ImageResult::ERR;

        for(int i = 0; i < num_pages; ++i) {
            urls.push_back(first_image_url_to_page_image_url(image_src, i));
        }

        return ImageResult::OK;
    }
}