F95API/app/index.js

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"use strict";
// Core modules
const fs = require("fs");
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// Modules from file
const shared = require("./scripts/shared.js");
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const constURLs = require("./scripts/constants/urls.js");
const selectors = require("./scripts/constants/css-selectors.js");
const { isStringAValidURL, urlExists } = require("./scripts/urls-helper.js");
const gameScraper = require("./scripts/game-scraper.js");
const {
prepareBrowser,
preparePage,
} = require("./scripts/puppeteer-helper.js");
const GameInfo = require("./scripts/classes/game-info.js");
const LoginResult = require("./scripts/classes/login-result.js");
const UserData = require("./scripts/classes/user-data.js");
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//#region Export classes
module.exports.GameInfo = GameInfo;
module.exports.LoginResult = LoginResult;
module.exports.UserData = UserData;
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//#endregion Export classes
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//#region Export properties
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/**
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* Shows log messages and other useful functions for module debugging.
* @param {Boolean} value
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*/
module.exports.debug = function (value) {
shared.debug = value;
};
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/**
* @public
* Indicates whether a user is logged in to the F95Zone platform or not.
* @returns {String}
*/
module.exports.isLogged = function () {
return shared.isLogged;
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};
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/**
* @public
* If true, it opens a new browser for each request
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* to the F95Zone platform, otherwise it reuses the same.
* @returns {String}
*/
module.exports.setIsolation = function (value) {
shared.isolation = value;
};
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/**
* @public
* Path to the cache directory
* @returns {String}
*/
module.exports.getCacheDir = function () {
return shared.cacheDir;
};
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/**
* @public
* Set path to the cache directory
* @returns {String}
*/
module.exports.setCacheDir = function (value) {
shared.cacheDir = value;
// Create directory if it doesn't exist
if (!fs.existsSync(shared.cacheDir)) fs.mkdirSync(shared.cacheDir);
};
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//#endregion Export properties
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//#region Global variables
var _browser = null;
//#endregion
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//#region Export methods
/**
* @public
* Log in to the F95Zone platform.
* This **must** be the first operation performed before accessing any other script functions.
* @param {String} username Username used for login
* @param {String} password Password used for login
* @returns {Promise<LoginResult>} Result of the operation
*/
module.exports.login = async function (username, password) {
if (shared.isLogged) {
if (shared.debug) console.log("Already logged in");
let result = new LoginResult();
result.success = true;
result.message = "Already logged in";
return result;
}
// If cookies are loaded, use them to authenticate
shared.cookies = loadCookies();
if (shared.cookies !== null) {
if (shared.debug) console.log("Valid session, no need to re-authenticate");
shared.isLogged = true;
let result = new LoginResult();
result.success = true;
result.message = "Logged with cookies";
return result;
}
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// Else, log in throught browser
if (shared.debug)
console.log("No saved sessions or expired session, login on the platform");
let browser = null;
if (shared.isolation) browser = await prepareBrowser();
else {
if (_browser === null) _browser = await prepareBrowser();
browser = _browser;
}
let result = await loginF95(browser, username, password);
shared.isLogged = result.success;
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if (result.success) {
// Reload cookies
shared.cookies = loadCookies();
if (shared.debug) console.log("User logged in through the platform");
} else {
console.warn("Error during authentication: " + result.message);
}
if (shared.isolation) await browser.close();
return result;
};
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/**
* @public
* This method loads the main data from the F95 portal
* used to provide game information. You **must** be logged
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* in to the portal before calling this method.
* @returns {Promise<Boolean>} Result of the operation
*/
module.exports.loadF95BaseData = async function () {
if (!shared.isLogged) {
console.warn("User not authenticated, unable to continue");
return false;
}
if (shared.debug) console.log("Loading base data...");
// Prepare a new web page
let browser = null;
if (shared.isolation) browser = await prepareBrowser();
else {
if (_browser === null) _browser = await prepareBrowser();
browser = _browser;
}
let page = await preparePage(browser); // Set new isolated page
await page.setCookie(...shared.cookies); // Set cookies to avoid login
// Go to latest update page and wait for it to load
await page.goto(constURLs.F95_LATEST_UPDATES, {
waitUntil: shared.WAIT_STATEMENT,
});
// Obtain engines (disc/online)
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await page.waitForSelector(selectors.ENGINE_ID_SELECTOR);
shared.engines = await loadValuesFromLatestPage(
page,
shared.enginesCachePath,
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selectors.ENGINE_ID_SELECTOR,
"engines"
);
// Obtain statuses (disc/online)
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await page.waitForSelector(selectors.STATUS_ID_SELECTOR);
shared.statuses = await loadValuesFromLatestPage(
page,
shared.statusesCachePath,
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selectors.STATUS_ID_SELECTOR,
"statuses"
);
if (shared.isolation) await browser.close();
if (shared.debug) console.log("Base data loaded");
return true;
};
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/**
* @public
* Returns the currently online version of the specified game.
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* You **must** be logged in to the portal before calling this method.
* @param {GameInfo} info Information about the game to get the version for
* @returns {Promise<String>} Currently online version of the specified game
*/
module.exports.getGameVersion = async function (info) {
if (!shared.isLogged) {
console.warn("user not authenticated, unable to continue");
return info.version;
}
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let exists = await urlExists(info.f95url);
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// F95 change URL at every game update, so if the URL is the same no update is available
if (exists) return info.version;
else return await module.exports.getGameData(info.name, info.isMod).version;
};
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/**
* @public
* Starting from the name, it gets all the information about the game you are looking for.
* You **must** be logged in to the portal before calling this method.
* @param {String} name Name of the game searched
* @param {Boolean} includeMods Indicates whether to also take mods into account when searching
* @returns {Promise<GameInfo[]>} List of information obtained where each item corresponds to
* an identified game (in the case of homonymy). If no games were found, null is returned
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*/
module.exports.getGameData = async function (name, includeMods) {
if (!shared.isLogged) {
console.warn("user not authenticated, unable to continue");
return null;
}
// Gets the search results of the game being searched for
let browser = null;
if (shared.isolation) browser = await prepareBrowser();
else {
if (_browser === null) _browser = await prepareBrowser();
browser = _browser;
}
let urlList = await getSearchGameResults(browser, name);
// Process previous partial results
let promiseList = [];
for (let url of urlList) {
// Start looking for information
promiseList.push(gameScraper.getGameInfo(browser, url));
}
// Filter for mods
let result = [];
for (let info of await Promise.all(promiseList)) {
// Skip mods if not required
if (info.isMod && !includeMods) continue;
else result.push(info);
}
if (shared.isolation) await browser.close();
return result;
};
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/**
* @public
* Gets the data of the currently logged in user.
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* You **must** be logged in to the portal before calling this method.
* @returns {Promise<UserData>} Data of the user currently logged in or null if an error arise
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*/
module.exports.getUserData = async function () {
if (!shared.isLogged) {
console.warn("user not authenticated, unable to continue");
return null;
}
// Prepare a new web page
let browser = null;
if (shared.isolation) browser = await prepareBrowser();
else {
if (_browser === null) _browser = await prepareBrowser();
browser = _browser;
}
let page = await preparePage(browser); // Set new isolated page
await page.setCookie(...shared.cookies); // Set cookies to avoid login
await page.goto(constURLs.F95_BASE_URL); // Go to base page
// Explicitly wait for the required items to load
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await page.waitForSelector(selectors.USERNAME_ELEMENT);
await page.waitForSelector(selectors.AVATAR_PIC);
let threads = getUserWatchedGameThreads(browser);
let username = await page.evaluate(
/* istanbul ignore next */ (selector) =>
document.querySelector(selector).innerText,
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selectors.USERNAME_ELEMENT
);
let avatarSrc = await page.evaluate(
/* istanbul ignore next */ (selector) =>
document.querySelector(selector).getAttribute("src"),
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selectors.AVATAR_PIC
);
let ud = new UserData();
ud.username = username;
ud.avatarSrc = isStringAValidURL(avatarSrc) ? avatarSrc : null;
ud.watchedThreads = await threads;
await page.close();
if (shared.isolation) await browser.close();
return ud;
};
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/**
* @public
* Logout from the current user and gracefully close shared browser.
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* You **must** be logged in to the portal before calling this method.
*/
module.exports.logout = function () {
if (!shared.isLogged) {
console.warn("user not authenticated, unable to continue");
return;
}
shared.isLogged = false;
// Gracefully close shared browser
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if (!shared.isolation && _browser !== null) {
_browser.close().then(() => (_browser = null));
}
};
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//#endregion
//#region Private methods
//#region Cookies functions
/**
* @private
* Loads and verifies the expiration of previously stored cookies from disk
* if they exist, otherwise it returns null.
* @return {object[]} List of dictionaries or null if cookies don't exist
*/
function loadCookies() {
// Check the existence of the cookie file
if (fs.existsSync(shared.cookiesCachePath)) {
// Read cookies
let cookiesJSON = fs.readFileSync(shared.cookiesCachePath);
let cookies = JSON.parse(cookiesJSON);
// Check if the cookies have expired
for (let cookie of cookies) {
if (isCookieExpired(cookie)) return null;
}
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// Cookies loaded and verified
return cookies;
} else return null;
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}
/**
* @private
* Check the validity of a cookie.
* @param {object} cookie Cookies to verify the validity. It's a dictionary
* @returns {Boolean} true if the cookie has expired, false otherwise
*/
function isCookieExpired(cookie) {
// Local variables
let expiredCookies = false;
// Ignore cookies that never expire
let expirationUnixTimestamp = cookie["expire"];
if (expirationUnixTimestamp !== "-1") {
// Convert UNIX epoch timestamp to normal Date
let expirationDate = new Date(expirationUnixTimestamp * 1000);
if (expirationDate < Date.now()) {
if (shared.debug)
console.log(
"Cookie " + cookie["name"] + " expired, you need to re-authenticate"
);
expiredCookies = true;
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}
}
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return expiredCookies;
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}
//#endregion Cookies functions
//#region Latest Updates page parserer
/**
* @private
* If present, it reads the file containing the searched values (engines or states)
* from the disk, otherwise it connects to the F95 portal (at the page
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* https://f95zone.to/latest) and downloads them.
* @param {puppeteer.Page} page Page used to locate the required elements
* @param {String} path Path to disk of the JSON file containing the data to read / write
* @param {String} selector CSS selector of the required elements
* @param {String} elementRequested Required element (engines or states) used to detail log messages
* @returns {Promise<String[]>} List of required values in uppercase
*/
async function loadValuesFromLatestPage(
page,
path,
selector,
elementRequested
) {
// If the values already exist they are loaded from disk without having to connect to F95
if (shared.debug) console.log("Load " + elementRequested + " from disk...");
if (fs.existsSync(path)) {
let valueJSON = fs.readFileSync(path);
return JSON.parse(valueJSON);
}
// Otherwise, connect and download the data from the portal
if (shared.debug)
console.log("No " + elementRequested + " cached, downloading...");
let values = await getValuesFromLatestPage(
page,
selector,
"Getting " + elementRequested + " from page"
);
fs.writeFileSync(path, JSON.stringify(values));
return values;
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}
/**
* @private
* Gets all the textual values of the elements present
* in the F95 portal page and identified by the selector
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* passed by parameter
* @param {puppeteer.Page} page Page used to locate items specified by the selector
* @param {String} selector CSS selector
* @param {String} logMessage Log message indicating which items the selector is requesting
* @return {Promise<String[]>} List of uppercase strings indicating the textual values of the elements identified by the selector
*/
async function getValuesFromLatestPage(page, selector, logMessage) {
if (shared.debug) console.log(logMessage);
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let result = [];
let elements = await page.$$(selector);
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for (let element of elements) {
let text = await element.evaluate(
/* istanbul ignore next */ (e) => e.innerText
);
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// Save as upper text for better match if used in query
result.push(text.toUpperCase());
}
return result;
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}
//#endregion
//#region User
/**
* @private
* Log in to the F95Zone portal and, if successful, save the cookies.
* @param {puppeteer.Browser} browser Browser object used for navigation
* @param {String} username Username to use during login
* @param {String} password Password to use during login
* @returns {Promise<LoginResult>} Result of the operation
*/
async function loginF95(browser, username, password) {
let page = await preparePage(browser); // Set new isolated page
await page.goto(constURLs.F95_LOGIN_URL); // Go to login page
// Explicitly wait for the required items to load
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await page.waitForSelector(selectors.USERNAME_INPUT);
await page.waitForSelector(selectors.PASSWORD_INPUT);
await page.waitForSelector(selectors.LOGIN_BUTTON);
await page.type(selectors.USERNAME_INPUT, username); // Insert username
await page.type(selectors.PASSWORD_INPUT, password); // Insert password
await page.click(selectors.LOGIN_BUTTON); // Click on the login button
await page.waitForNavigation({
waitUntil: shared.WAIT_STATEMENT,
}); // Wait for page to load
// Prepare result
let result = new LoginResult();
// Check if the user is logged in
result.success = await page.evaluate(
/* istanbul ignore next */ (selector) =>
document.querySelector(selector) !== null,
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selectors.AVATAR_INFO
);
// Save cookies to avoid re-auth
if (result.success) {
let c = await page.cookies();
fs.writeFileSync(shared.cookiesCachePath, JSON.stringify(c));
result.message = "Authentication successful";
}
// Obtain the error message
else if (
await page.evaluate(
/* istanbul ignore next */ (selector) =>
document.querySelector(selector) !== null,
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selectors.LOGIN_MESSAGE_ERROR
)
) {
let errorMessage = await page.evaluate(
/* istanbul ignore next */ (selector) =>
document.querySelector(selector).innerText,
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selectors.LOGIN_MESSAGE_ERROR
);
if (errorMessage === "Incorrect password. Please try again.") {
result.message = "Incorrect password";
} else if (
errorMessage ===
"The requested user '" + username + "' could not be found."
) {
result.message = "Incorrect username";
} else result.message = errorMessage;
} else result.message = "Unknown error";
await page.close(); // Close the page
return result;
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}
/**
* @private
* Gets the list of URLs of threads the user follows.
* @param {puppeteer.Browser} browser Browser object used for navigation
* @returns {Promise<String[]>} URL list
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*/
async function getUserWatchedGameThreads(browser) {
let page = await preparePage(browser); // Set new isolated page
await page.goto(constURLs.F95_WATCHED_THREADS); // Go to the thread page
// Explicitly wait for the required items to load
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await page.waitForSelector(selectors.WATCHED_THREAD_FILTER_POPUP_BUTTON);
// Show the popup
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await page.click(selectors.WATCHED_THREAD_FILTER_POPUP_BUTTON);
await page.waitForSelector(selectors.UNREAD_THREAD_CHECKBOX);
await page.waitForSelector(selectors.ONLY_GAMES_THREAD_OPTION);
await page.waitForSelector(selectors.FILTER_THREADS_BUTTON);
// Set the filters
await page.evaluate(
/* istanbul ignore next */ (selector) =>
document.querySelector(selector).removeAttribute("checked"),
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selectors.UNREAD_THREAD_CHECKBOX
); // Also read the threads already read
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await page.click(selectors.ONLY_GAMES_THREAD_OPTION);
// Filter the threads
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await page.click(selectors.FILTER_THREADS_BUTTON);
await page.waitForSelector(selectors.WATCHED_THREAD_URLS);
// Get the threads urls
let urls = [];
let nextPageExists = false;
do {
// Get all the URLs
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for (let handle of await page.$$(selectors.WATCHED_THREAD_URLS)) {
let src = await page.evaluate(
/* istanbul ignore next */ (element) => element.href,
handle
);
// If 'unread' is left, it will redirect to the last unread post
let url = src.replace("/unread", "");
urls.push(url);
}
nextPageExists = await page.evaluate(
/* istanbul ignore next */ (selector) => document.querySelector(selector),
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selectors.WATCHED_THREAD_NEXT_PAGE
);
// Click to next page
if (nextPageExists) {
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await page.click(selectors.WATCHED_THREAD_NEXT_PAGE);
await page.waitForSelector(selectors.WATCHED_THREAD_URLS);
}
} while (nextPageExists);
await page.close();
return urls;
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}
//#endregion User
//#region Game search
/**
* @private
* Search the F95Zone portal to find possible conversations regarding the game you are looking for.
* @param {puppeteer.Browser} browser Browser object used for navigation
* @param {String} gamename Name of the game to search for
* @returns {Promise<String[]>} List of URL of possible games obtained from the preliminary research on the F95 portal
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*/
async function getSearchGameResults(browser, gamename) {
if (shared.debug) console.log("Searching " + gamename + " on F95Zone");
let page = await preparePage(browser); // Set new isolated page
await page.setCookie(...shared.cookies); // Set cookies to avoid login
await page.goto(constURLs.F95_SEARCH_URL, {
waitUntil: shared.WAIT_STATEMENT,
}); // Go to the search form and wait for it
// Explicitly wait for the required items to load
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await page.waitForSelector(selectors.SEARCH_FORM_TEXTBOX);
await page.waitForSelector(selectors.TITLE_ONLY_CHECKBOX);
await page.waitForSelector(selectors.SEARCH_BUTTON);
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await page.type(selectors.SEARCH_FORM_TEXTBOX, gamename); // Type the game we desire
await page.click(selectors.TITLE_ONLY_CHECKBOX); // Select only the thread with the game in the titles
await page.click(selectors.SEARCH_BUTTON); // Execute search
await page.waitForNavigation({
waitUntil: shared.WAIT_STATEMENT,
}); // Wait for page to load
// Select all conversation titles
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let threadTitleList = await page.$$(selectors.THREAD_TITLE);
// For each title extract the info about the conversation
if (shared.debug) console.log("Extracting info from conversation titles");
let results = [];
for (let title of threadTitleList) {
let gameUrl = await getOnlyGameThreads(page, title);
// Append the game's informations
if (gameUrl !== null) results.push(gameUrl);
}
if (shared.debug) console.log("Find " + results.length + " conversations");
await page.close(); // Close the page
return results;
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}
/**
* @private
* Return the link of a conversation if it is a game or a mod
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* @param {puppeteer.Page} page Page containing the conversation to be analyzed
* @param {puppeteer.ElementHandle} titleHandle Title of the conversation to be analyzed
* @return {Promise<String>} URL of the game/mod
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*/
async function getOnlyGameThreads(page, titleHandle) {
const GAME_RECOMMENDATION_PREFIX = "RECOMMENDATION";
// Get the URL of the thread from the title
let relativeURLThread = await page.evaluate(
/* istanbul ignore next */ (element) => element.querySelector("a").href,
titleHandle
);
let url = new URL(relativeURLThread, constURLs.F95_BASE_URL).toString();
// Parse prefixes to ignore game recommendation
for (let element of await titleHandle.$$('span[dir="auto"]')) {
// Elaborate the prefixes
let prefix = await page.evaluate(
/* istanbul ignore next */ (element) => element.textContent.toUpperCase(),
element
);
prefix = prefix.replace("[", "").replace("]", "");
// This is not a game nor a mod, we can exit
if (prefix === GAME_RECOMMENDATION_PREFIX) return null;
}
return url;
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}
//#endregion Game search
//#endregion Private methods