376 lines
12 KiB
JavaScript
376 lines
12 KiB
JavaScript
"use strict";
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// Public modules from npm
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const HTMLParser = require("node-html-parser");
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const puppeteer = require("puppeteer");
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// Modules from file
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const shared = require("./shared.js");
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const selectors = require("./constants/css-selectors.js");
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const { preparePage } = require("./puppeteer-helper.js");
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const GameDownload = require("./classes/game-download.js");
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const GameInfo = require("./classes/game-info.js");
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const { isStringAValidURL, isF95URL, urlExists } = require("./urls-helper.js");
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/**
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* @protected
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* Get information from the game's main page.
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* @param {puppeteer.Browser} browser Browser object used for navigation
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* @param {String} url URL (String) of the game/mod to extract data from
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* @return {Promise<GameInfo>} Complete information about the game you are
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* looking for or null if the URL doesn't exists
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*/
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module.exports.getGameInfo = async function (browser, url) {
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if (shared.debug) console.log("Obtaining game info");
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// Verify the correctness of the URL
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if (!isF95URL(url)) throw url + " is not a valid F95Zone URL";
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let exists = await urlExists(url);
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if (!exists) return null;
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let page = await preparePage(browser); // Set new isolated page
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await page.setCookie(...shared.cookies); // Set cookies to avoid login
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await page.goto(url, {
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waitUntil: shared.WAIT_STATEMENT,
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}); // Go to the game page and wait until it loads
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// It asynchronously searches for the elements and
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// then waits at the end to compile the object to be returned
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let info = new GameInfo();
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let title = getGameTitle(page);
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let author = getGameAuthor(page);
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let tags = getGameTags(page);
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let previewSource = getGamePreviewSource(page);
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let downloadData = getGameDownloadLink(page);
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info = await parsePrefixes(page, info); // Fill status/engines/isMod
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let structuredText = await getMainPostStructuredText(page);
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let overview = getOverview(structuredText, info.isMod);
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let parsedInfos = parseConversationPage(structuredText);
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// Fill in the GameInfo element with the information obtained
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info.name = await title;
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info.author = await author;
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info.overview = overview;
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info.tags = await tags;
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info.f95url = url;
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info.version = info.isMod
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? parsedInfos["MOD VERSION"]
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: parsedInfos["VERSION"];
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info.lastUpdate = info.isMod
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? parsedInfos["UPDATED"]
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: parsedInfos["THREAD UPDATED"];
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info.previewSource = await previewSource;
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info.downloadInfo = await downloadData;
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await page.close(); // Close the page
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if (shared.debug) console.log("Founded data for " + info.name);
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return info;
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};
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//#region Private methods
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/**
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* @private
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* Get the game description from its web page.
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* Different processing depending on whether the game is a mod or not.
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* @param {String} text Structured text extracted from the game's web page
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* @param {Boolean} isMod Specify if it is a game or a mod
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* @returns {Promise<String>} Game description
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*/
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function getOverview(text, isMod) {
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// Get overview (different parsing for game and mod)
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let overviewEndIndex;
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if (isMod) overviewEndIndex = text.indexOf("Updated");
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else overviewEndIndex = text.indexOf("Thread Updated");
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return text.substring(0, overviewEndIndex).replace("Overview:\n", "").trim();
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}
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/**
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* @private
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* Extrapolate the page structure by removing the element tags
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* and leaving only the text and its spacing.
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* @param {puppeteer.Page} page Page containing the text
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* @returns {Promise<String>} Structured text
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*/
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async function getMainPostStructuredText(page) {
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// Gets the first post, where are listed all the game's informations
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let post = (await page.$$(selectors.THREAD_POSTS))[0];
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// The info are plain text so we need to parse the HTML code
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let bodyHTML = await page.evaluate(
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/* istanbul ignore next */ (mainPost) => mainPost.innerHTML,
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post
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);
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return HTMLParser.parse(bodyHTML).structuredText;
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}
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/**
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* @private
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* Extrapolates and cleans the author from the page passed by parameter.
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* @param {puppeteer.Page} page Page containing the author to be extrapolated
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* @returns {Promise<String>} Game author
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*/
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async function getGameAuthor(page) {
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// Get the game/mod name (without square brackets)
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let titleHTML = await page.evaluate(
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/* istanbul ignore next */ (selector) =>
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document.querySelector(selector).innerHTML,
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selectors.GAME_TITLE
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);
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let structuredTitle = HTMLParser.parse(titleHTML);
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// The last element **shoud be** the title without prefixes (engines, status, other...)
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let gameTitle = structuredTitle.childNodes.pop().rawText;
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// The last square brackets contain the author
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let startTitleIndex = gameTitle.lastIndexOf("[") + 1;
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return gameTitle.substring(startTitleIndex, gameTitle.length - 1).trim();
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}
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/**
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* @private
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* Process the post text to get all the useful
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* information in the format *DESCRIPTOR : VALUE*.
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* @param {String} text Structured text of the post
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* @returns {Object} Dictionary of information
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*/
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function parseConversationPage(text) {
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let dataPairs = {};
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// The information searched in the game post are one per line
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let splittedText = text.split("\n");
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for (let line of splittedText) {
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if (!line.includes(":")) continue;
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// Create pair key/value
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let splitted = line.split(":");
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let key = splitted[0].trim().toUpperCase(); // Uppercase to avoid mismatch
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let value = splitted[1].trim();
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// Add pair to the dict if valid
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if (value != "") dataPairs[key] = value;
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}
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return dataPairs;
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}
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/**
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* @private
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* Gets the URL of the image used as a preview for the game in the conversation.
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* @param {puppeteer.Page} page Page containing the URL to be extrapolated
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* @returns {Promise<String>} URL (String) of the image or null if failed to get it
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*/
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async function getGamePreviewSource(page) {
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let src = await page.evaluate(
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/* istanbul ignore next */ (selector) => {
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// Get the firs image available
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let img = document.querySelector(selector);
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if (img) return img.getAttribute("src");
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else return null;
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},
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selectors.GAME_IMAGES
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);
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// Check if the URL is valid
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return isStringAValidURL(src) ? src : null;
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}
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/**
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* @private
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* Extrapolates and cleans the title from the page passed by parameter.
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* @param {puppeteer.Page} page Page containing the title to be extrapolated
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* @returns {Promise<String>} Game title
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*/
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async function getGameTitle(page) {
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// Get the game/mod name (without square brackets)
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let titleHTML = await page.evaluate(
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/* istanbul ignore next */ (selector) =>
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document.querySelector(selector).innerHTML,
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selectors.GAME_TITLE
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);
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let structuredTitle = HTMLParser.parse(titleHTML);
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// The last element **shoud be** the title without prefixes (engines, status, other...)
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let gameTitle = structuredTitle.childNodes.pop().rawText;
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let endTitleIndex = gameTitle.indexOf("[");
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return gameTitle.substring(0, endTitleIndex).trim();
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}
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/**
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* @private
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* Get the alphabetically sorted list of tags associated with the game.
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* @param {puppeteer.Page} page Page containing the tags to be extrapolated
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* @returns {Promise<String[]>} List of uppercase tags
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*/
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async function getGameTags(page) {
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let tags = [];
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// Get the game tags
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for (let handle of await page.$$(selectors.GAME_TAGS)) {
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let tag = await page.evaluate(
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/* istanbul ignore next */ (element) => element.innerText,
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handle
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);
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tags.push(tag.toUpperCase());
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}
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return tags.sort();
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}
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/**
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* @private
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* Process the game title prefixes to extract information such as game status,
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* graphics engine used, and whether it is a mod or original game.
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* @param {puppeteer.Page} page Page containing the prefixes to be extrapolated
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* @param {GameInfo} info Object to assign the identified information to
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* @returns {Promise<GameInfo>} GameInfo object passed in to which the identified information has been added
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*/
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async function parsePrefixes(page, info) {
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const MOD_PREFIX = "MOD";
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// The 'Ongoing' status is not specified, only 'Abandoned'/'OnHold'/'Complete'
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info.status = "Ongoing";
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for (let handle of await page.$$(selectors.GAME_TITLE_PREFIXES)) {
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let value = await page.evaluate(
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/* istanbul ignore next */ (element) => element.innerText,
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handle
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);
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// Clean the prefix
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let prefix = value.toUpperCase().replace("[", "").replace("]", "").trim();
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// Getting infos...
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if (shared.statuses.includes(prefix)) info.status = prefix;
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else if (shared.engines.includes(prefix)) info.engine = prefix;
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// This is not a game but a mod
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else if (prefix === MOD_PREFIX) info.isMod = true;
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}
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return info;
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}
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/**
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* @private
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* Get game download links for different platforms.
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* @param {puppeteer.Page} page Page containing the links to be extrapolated
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* @returns {Promise<GameDownload[]>} List of objects used for game download
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*/
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async function getGameDownloadLink(page) {
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// Most used hosting platforms
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let hostingPlatforms = [
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"MEGA",
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"NOPY",
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"FILESUPLOAD",
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"MIXDROP",
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"UPLOADHAVEN",
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"PIXELDRAIN",
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"FILESFM",
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];
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// Supported OS platforms
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let platformOS = ["WIN", "LINUX", "MAC", "ALL"];
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// Gets the <span> which contains the download links
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let temp = await page.$$(selectors.DOWNLOAD_LINKS_CONTAINER);
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if (temp.length === 0) return [];
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// Look for the container that contains the links
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// It is necessary because the same css selector
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// also identifies other elements on the page
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let container = null;
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for (let candidate of temp) {
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if (container !== null) break;
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let upperText = (
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await page.evaluate(
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/* istanbul ignore next */ (e) => e.innerText,
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candidate
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)
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).toUpperCase();
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// Search if the container contains the name of a hosting platform
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for (let p of hostingPlatforms) {
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if (upperText.includes(p)) {
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container = candidate;
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break;
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}
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}
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}
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if (container === null) return [];
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// Extract the HTML text from the container
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let searchText = (
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await page.evaluate(
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/* istanbul ignore next */ (e) => e.innerHTML,
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container
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)
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).toLowerCase();
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// Parse the download links
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let downloadData = [];
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for (let platform of platformOS) {
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let data = extractGameHostingData(platform, searchText);
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downloadData.push(...data);
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}
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return downloadData;
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}
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/**
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* @private
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* From the HTML text it extracts the game download links for the specified operating system.
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* @param {String} platform Name of the operating system to look for a compatible link to.
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* It can only be *WIN/LINUX/MAC/ALL*
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* @param {String} text HTML string to extract links from
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* @returns {GameDownload[]} List of game download links for the selected platform
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*/
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function extractGameHostingData(platform, text) {
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const PLATFORM_BOLD_OPEN = "<b>";
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const CONTAINER_SPAN_CLOSE = "</span>";
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const LINK_OPEN = "<a";
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const LINK_CLOSE = "</a>";
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const HREF_START = 'href="';
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const HREF_END = '"';
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const TAG_CLOSE = ">";
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// Identify the individual platforms
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let startIndex = text.indexOf(platform.toLowerCase());
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if (startIndex === -1) return [];
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else startIndex += platform.length;
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// Find the <b>platform</b>
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let endIndex =
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text.indexOf(PLATFORM_BOLD_OPEN, startIndex) + PLATFORM_BOLD_OPEN.length;
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// Find the end of the container
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if (endIndex === -1)
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text.indexOf(CONTAINER_SPAN_CLOSE, startIndex) +
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CONTAINER_SPAN_CLOSE.length;
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text = text.substring(startIndex, endIndex);
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let downloadData = [];
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let linkTags = text.split(LINK_OPEN);
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for (let tag of linkTags) {
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// Ignore non-link string
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if (!tag.includes(HREF_START)) continue;
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// Find the hosting platform name
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startIndex = tag.indexOf(TAG_CLOSE) + TAG_CLOSE.length;
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endIndex = tag.indexOf(LINK_CLOSE, startIndex);
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let hosting = tag.substring(startIndex, endIndex);
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// Find the 'href' attribute
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startIndex = tag.indexOf(HREF_START) + HREF_START.length;
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endIndex = tag.indexOf(HREF_END, startIndex);
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let link = tag.substring(startIndex, endIndex);
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if (isStringAValidURL(link)) {
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let gd = new GameDownload();
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gd.hosting = hosting.toUpperCase();
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gd.link = link;
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gd.supportedOS = platform.toUpperCase();
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downloadData.push(gd);
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}
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}
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return downloadData;
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}
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//#endregion Private methods
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