/*!
 * puppeteer-extra v3.2.0 by berstend
 * https://github.com/berstend/puppeteer-extra
 * @license MIT
 */
import Debug from 'debug';
import merge from 'deepmerge';

const debug = Debug('puppeteer-extra');
/**
 * Modular plugin framework to teach `puppeteer` new tricks.
 *
 * This module acts as a drop-in replacement for `puppeteer`.
 *
 * Allows PuppeteerExtraPlugin's to register themselves and
 * to extend puppeteer with additional functionality.
 *
 * @class PuppeteerExtra
 * @implements {VanillaPuppeteer}
 *
 * @example
 * const puppeteer = require('puppeteer-extra')
 * puppeteer.use(require('puppeteer-extra-plugin-anonymize-ua')())
 * puppeteer.use(require('puppeteer-extra-plugin-font-size')({defaultFontSize: 18}))
 *
 * ;(async () => {
 *   const browser = await puppeteer.launch({headless: false})
 *   const page = await browser.newPage()
 *   await page.goto('http://example.com', {waitUntil: 'domcontentloaded'})
 *   await browser.close()
 * })()
 */
class PuppeteerExtra {
    constructor(_pptr, _requireError) {
        this._pptr = _pptr;
        this._requireError = _requireError;
        this._plugins = [];
    }
    /**
     * The **main interface** to register `puppeteer-extra` plugins.
     *
     * @example
     * puppeteer.use(plugin1).use(plugin2)
     *
     * @see [PuppeteerExtraPlugin]
     *
     * @return The same `PuppeteerExtra` instance (for optional chaining)
     */
    use(plugin) {
        if (typeof plugin !== 'object' || !plugin._isPuppeteerExtraPlugin) {
            console.error(`Warning: Plugin is not derived from PuppeteerExtraPlugin, ignoring.`, plugin);
            return this;
        }
        if (!plugin.name) {
            console.error(`Warning: Plugin with no name registering, ignoring.`, plugin);
            return this;
        }
        if (plugin.requirements.has('dataFromPlugins')) {
            plugin.getDataFromPlugins = this.getPluginData.bind(this);
        }
        plugin._register(Object.getPrototypeOf(plugin));
        this._plugins.push(plugin);
        debug('plugin registered', plugin.name);
        return this;
    }
    /**
     * To stay backwards compatible with puppeteer's (and our) default export after adding `addExtra`
     * we need to defer the check if we have a puppeteer instance to work with.
     * Otherwise we would throw even if the user intends to use their non-standard puppeteer implementation.
     *
     * @private
     */
    get pptr() {
        if (this._pptr) {
            return this._pptr;
        }
        // Whoopsie
        console.warn(`
    Puppeteer is missing. :-)

    Note: puppeteer is a peer dependency of puppeteer-extra,
    which means you can install your own preferred version.

    - To get the latest stable version run: 'yarn add puppeteer' or 'npm i puppeteer'

    Alternatively:
    - To get puppeteer without the bundled Chromium browser install 'puppeteer-core'
    - To use puppeteer-firefox install 'puppeteer-firefox' and use the 'addExtra' export
    `);
        throw this._requireError || new Error('No puppeteer instance provided.');
    }
    /**
     * The method launches a browser instance with given arguments. The browser will be closed when the parent node.js process is closed.
     *
     * Augments the original `puppeteer.launch` method with plugin lifecycle methods.
     *
     * All registered plugins that have a `beforeLaunch` method will be called
     * in sequence to potentially update the `options` Object before launching the browser.
     *
     * @example
     * const browser = await puppeteer.launch({
     *   headless: false,
     *   defaultViewport: null
     * })
     *
     * @param options - See [puppeteer docs](https://github.com/puppeteer/puppeteer/blob/master/docs/api.md#puppeteerlaunchoptions).
     */
    async launch(options) {
        // Ensure there are certain properties (e.g. the `options.args` array)
        const defaultLaunchOptions = { args: [] };
        options = merge(defaultLaunchOptions, options || {});
        this.resolvePluginDependencies();
        this.orderPlugins();
        // Give plugins the chance to modify the options before launch
        options = await this.callPluginsWithValue('beforeLaunch', options);
        const opts = {
            context: 'launch',
            options,
            defaultArgs: this.defaultArgs
        };
        // Let's check requirements after plugin had the chance to modify the options
        this.checkPluginRequirements(opts);
        const browser = await this.pptr.launch(options);
        this._patchPageCreationMethods(browser);
        await this.callPlugins('_bindBrowserEvents', browser, opts);
        return browser;
    }
    /**
     * Attach Puppeteer to an existing Chromium instance.
     *
     * Augments the original `puppeteer.connect` method with plugin lifecycle methods.
     *
     * All registered plugins that have a `beforeConnect` method will be called
     * in sequence to potentially update the `options` Object before launching the browser.
     *
     * @param options - See [puppeteer docs](https://github.com/puppeteer/puppeteer/blob/master/docs/api.md#puppeteerconnectoptions).
     */
    async connect(options) {
        this.resolvePluginDependencies();
        this.orderPlugins();
        // Give plugins the chance to modify the options before connect
        options = await this.callPluginsWithValue('beforeConnect', options);
        const opts = { context: 'connect', options };
        // Let's check requirements after plugin had the chance to modify the options
        this.checkPluginRequirements(opts);
        const browser = await this.pptr.connect(options);
        this._patchPageCreationMethods(browser);
        await this.callPlugins('_bindBrowserEvents', browser, opts);
        return browser;
    }
    /**
     * The default flags that Chromium will be launched with.
     *
     * @param options - See [puppeteer docs](https://github.com/puppeteer/puppeteer/blob/master/docs/api.md#puppeteerdefaultargsoptions).
     */
    defaultArgs(options) {
        return this.pptr.defaultArgs(options);
    }
    /** Path where Puppeteer expects to find bundled Chromium. */
    executablePath() {
        return this.pptr.executablePath();
    }
    /**
     * This methods attaches Puppeteer to an existing Chromium instance.
     *
     * @param options - See [puppeteer docs](https://github.com/puppeteer/puppeteer/blob/master/docs/api.md#puppeteercreatebrowserfetcheroptions).
     */
    createBrowserFetcher(options) {
        return this.pptr.createBrowserFetcher(options);
    }
    /**
     * Patch page creation methods (both regular and incognito contexts).
     *
     * Unfortunately it's possible that the `targetcreated` events are not triggered
     * early enough for listeners (e.g. plugins using `onPageCreated`) to be able to
     * modify the page instance (e.g. user-agent) before the browser request occurs.
     *
     * This only affects the first request of a newly created page target.
     *
     * As a workaround I've noticed that navigating to `about:blank` (again),
     * right after a page has been created reliably fixes this issue and adds
     * no noticable delay or side-effects.
     *
     * This problem is not specific to `puppeteer-extra` but default Puppeteer behaviour.
     *
     * Note: This patch only fixes explicitly created pages, implicitly created ones
     * (e.g. through `window.open`) are still subject to this issue. I didn't find a
     * reliable mitigation for implicitly created pages yet.
     *
     * Puppeteer issues:
     * https://github.com/GoogleChrome/puppeteer/issues/2669
     * https://github.com/puppeteer/puppeteer/issues/3667
     * https://github.com/GoogleChrome/puppeteer/issues/386#issuecomment-343059315
     * https://github.com/GoogleChrome/puppeteer/issues/1378#issue-273733905
     *
     * @private
     */
    _patchPageCreationMethods(browser) {
        if (!browser._createPageInContext) {
            debug('warning: _patchPageCreationMethods failed (no browser._createPageInContext)');
            return;
        }
        browser._createPageInContext = (function (originalMethod, context) {
            return async function () {
                const page = await originalMethod.apply(context, arguments);
                await page.goto('about:blank');
                return page;
            };
        })(browser._createPageInContext, browser);
    }
    /**
     * Get a list of all registered plugins.
     *
     * @member {Array<PuppeteerExtraPlugin>}
     */
    get plugins() {
        return this._plugins;
    }
    /**
     * Get the names of all registered plugins.
     *
     * @member {Array<string>}
     * @private
     */
    get pluginNames() {
        return this._plugins.map(p => p.name);
    }
    /**
     * Collects the exposed `data` property of all registered plugins.
     * Will be reduced/flattened to a single array.
     *
     * Can be accessed by plugins that listed the `dataFromPlugins` requirement.
     *
     * Implemented mainly for plugins that need data from other plugins (e.g. `user-preferences`).
     *
     * @see [PuppeteerExtraPlugin]/data
     * @param name - Filter data by optional plugin name
     *
     * @private
     */
    getPluginData(name) {
        const data = this._plugins
            .map(p => (Array.isArray(p.data) ? p.data : [p.data]))
            .reduce((acc, arr) => [...acc, ...arr], []);
        return name ? data.filter((d) => d.name === name) : data;
    }
    /**
     * Get all plugins that feature a given property/class method.
     *
     * @private
     */
    getPluginsByProp(prop) {
        return this._plugins.filter(plugin => prop in plugin);
    }
    /**
     * Lightweight plugin dependency management to require plugins and code mods on demand.
     *
     * This uses the `dependencies` stanza (a `Set`) exposed by `puppeteer-extra` plugins.
     *
     * @todo Allow objects as depdencies that contains opts for the requested plugin.
     *
     * @private
     */
    resolvePluginDependencies() {
        // Request missing dependencies from all plugins and flatten to a single Set
        const missingPlugins = this._plugins
            .map(p => p._getMissingDependencies(this._plugins))
            .reduce((combined, list) => {
            return new Set([...combined, ...list]);
        }, new Set());
        if (!missingPlugins.size) {
            debug('no dependencies are missing');
            return;
        }
        debug('dependencies missing', missingPlugins);
        // Loop through all dependencies declared missing by plugins
        for (let name of [...missingPlugins]) {
            // Check if the dependency hasn't been registered as plugin already.
            // This might happen when multiple plugins have nested dependencies.
            if (this.pluginNames.includes(name)) {
                debug(`ignoring dependency '${name}', which has been required already.`);
                continue;
            }
            // We follow a plugin naming convention, but let's rather enforce it <3
            name = name.startsWith('puppeteer-extra-plugin')
                ? name
                : `puppeteer-extra-plugin-${name}`;
            // In case a module sub resource is requested print out the main package name
            // e.g. puppeteer-extra-plugin-stealth/evasions/console.debug => puppeteer-extra-plugin-stealth
            const packageName = name.split('/')[0];
            let dep = null;
            try {
                // Try to require and instantiate the stated dependency
                dep = require(name)();
                // Register it with `puppeteer-extra` as plugin
                this.use(dep);
            }
            catch (err) {
                console.warn(`
          A plugin listed '${name}' as dependency,
          which is currently missing. Please install it:

          yarn add ${packageName}

          Note: You don't need to require the plugin yourself,
          unless you want to modify it's default settings.
          `);
                throw err;
            }
            // Handle nested dependencies :D
            if (dep.dependencies.size) {
                this.resolvePluginDependencies();
            }
        }
    }
    /**
     * Order plugins that have expressed a special placement requirement.
     *
     * This is useful/necessary for e.g. plugins that depend on the data from other plugins.
     *
     * @todo Support more than 'runLast'.
     * @todo If there are multiple plugins defining 'runLast', sort them depending on who depends on whom. :D
     *
     * @private
     */
    orderPlugins() {
        debug('orderPlugins:before', this.pluginNames);
        const runLast = this._plugins
            .filter(p => p.requirements.has('runLast'))
            .map(p => p.name);
        for (const name of runLast) {
            const index = this._plugins.findIndex(p => p.name === name);
            this._plugins.push(this._plugins.splice(index, 1)[0]);
        }
        debug('orderPlugins:after', this.pluginNames);
    }
    /**
     * Lightweight plugin requirement checking.
     *
     * The main intent is to notify the user when a plugin won't work as expected.
     *
     * @todo This could be improved, e.g. be evaluated by the plugin base class.
     *
     * @private
     */
    checkPluginRequirements(opts = {}) {
        for (const plugin of this._plugins) {
            for (const requirement of plugin.requirements) {
                if (opts.context === 'launch' &&
                    requirement === 'headful' &&
                    opts.options.headless) {
                    console.warn(`Warning: Plugin '${plugin.name}' is not supported in headless mode.`);
                }
                if (opts.context === 'connect' && requirement === 'launch') {
                    console.warn(`Warning: Plugin '${plugin.name}' doesn't support puppeteer.connect().`);
                }
            }
        }
    }
    /**
     * Call plugins sequentially with the same values.
     * Plugins that expose the supplied property will be called.
     *
     * @param prop - The plugin property to call
     * @param values - Any number of values
     * @private
     */
    async callPlugins(prop, ...values) {
        for (const plugin of this.getPluginsByProp(prop)) {
            await plugin[prop].apply(plugin, values);
        }
    }
    /**
     * Call plugins sequentially and pass on a value (waterfall style).
     * Plugins that expose the supplied property will be called.
     *
     * The plugins can either modify the value or return an updated one.
     * Will return the latest, updated value which ran through all plugins.
     *
     * @param prop - The plugin property to call
     * @param value - Any value
     * @return The new updated value
     * @private
     */
    async callPluginsWithValue(prop, value) {
        for (const plugin of this.getPluginsByProp(prop)) {
            const newValue = await plugin[prop](value);
            if (newValue) {
                value = newValue;
            }
        }
        return value;
    }
}
/**
 * The **default export** will behave exactly the same as the regular puppeteer
 * (just with extra plugin functionality) and can be used as a drop-in replacement.
 *
 * Behind the scenes it will try to require either `puppeteer`
 * or [`puppeteer-core`](https://github.com/puppeteer/puppeteer/blob/master/docs/api.md#puppeteer-vs-puppeteer-core)
 * from the installed dependencies.
 *
 * @example
 * // javascript import
 * const puppeteer = require('puppeteer-extra')
 *
 * // typescript/es6 module import
 * import puppeteer from 'puppeteer-extra'
 *
 * // Add plugins
 * puppeteer.use(...)
 */
const defaultExport = (() => {
    return new PuppeteerExtra(...requireVanillaPuppeteer());
})();
/**
 * An **alternative way** to use `puppeteer-extra`: Augments the provided puppeteer with extra plugin functionality.
 *
 * This is useful in case you need multiple puppeteer instances with different plugins or to add plugins to a non-standard puppeteer package.
 *
 * @example
 * // js import
 * const { addExtra } = require('puppeteer-extra')
 *
 * // ts/es6 import
 * import { addExtra } from 'puppeteer-extra'
 *
 * // Patch e.g. puppeteer-firefox and add plugins
 * const puppeteer = addExtra(require('puppeteer-firefox'))
 * puppeteer.use(...)
 *
 * @param puppeteer Any puppeteer API-compatible puppeteer implementation or version.
 * @return A fresh PuppeteerExtra instance using the provided puppeteer
 */
const addExtra = (puppeteer) => new PuppeteerExtra(puppeteer);
/**
 * Attempt to require puppeteer or puppeteer-core from dependencies.
 * To stay backwards compatible with the existing default export we have to do some gymnastics here.
 *
 * @return Either a Puppeteer instance or an Error, which we'll throw later if need be.
 * @private
 */
function requireVanillaPuppeteer() {
    try {
        return [require('puppeteer-core'), undefined];
    }
    catch (_) {
        // noop
    }
    try {
        return [require('puppeteer'), undefined];
    }
    catch (err) {
        return [undefined, err];
    }
}

export default defaultExport;
export { PuppeteerExtra, addExtra };
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