source: imaps-frontend/node_modules/debug/src/browser.js

/* eslint-env browser */

/**
 * This is the web browser implementation of `debug()`.
 */

exports.formatArgs = formatArgs;
exports.save = save;
exports.load = load;
exports.useColors = useColors;
exports.storage = localstorage();
exports.destroy = (() => {
        let warned = false;

        return () => {
                if (!warned) {
                        warned = true;
                        console.warn('Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.');
                }
        };
})();

/**
 * Colors.
 */

exports.colors = [
        '#0000CC',
        '#0000FF',
        '#0033CC',
        '#0033FF',
        '#0066CC',
        '#0066FF',
        '#0099CC',
        '#0099FF',
        '#00CC00',
        '#00CC33',
        '#00CC66',
        '#00CC99',
        '#00CCCC',
        '#00CCFF',
        '#3300CC',
        '#3300FF',
        '#3333CC',
        '#3333FF',
        '#3366CC',
        '#3366FF',
        '#3399CC',
        '#3399FF',
        '#33CC00',
        '#33CC33',
        '#33CC66',
        '#33CC99',
        '#33CCCC',
        '#33CCFF',
        '#6600CC',
        '#6600FF',
        '#6633CC',
        '#6633FF',
        '#66CC00',
        '#66CC33',
        '#9900CC',
        '#9900FF',
        '#9933CC',
        '#9933FF',
        '#99CC00',
        '#99CC33',
        '#CC0000',
        '#CC0033',
        '#CC0066',
        '#CC0099',
        '#CC00CC',
        '#CC00FF',
        '#CC3300',
        '#CC3333',
        '#CC3366',
        '#CC3399',
        '#CC33CC',
        '#CC33FF',
        '#CC6600',
        '#CC6633',
        '#CC9900',
        '#CC9933',
        '#CCCC00',
        '#CCCC33',
        '#FF0000',
        '#FF0033',
        '#FF0066',
        '#FF0099',
        '#FF00CC',
        '#FF00FF',
        '#FF3300',
        '#FF3333',
        '#FF3366',
        '#FF3399',
        '#FF33CC',
        '#FF33FF',
        '#FF6600',
        '#FF6633',
        '#FF9900',
        '#FF9933',
        '#FFCC00',
        '#FFCC33'
];

/**
 * Currently only WebKit-based Web Inspectors, Firefox >= v31,
 * and the Firebug extension (any Firefox version) are known
 * to support "%c" CSS customizations.
 *
 * TODO: add a `localStorage` variable to explicitly enable/disable colors
 */

// eslint-disable-next-line complexity
function useColors() {
        // NB: In an Electron preload script, document will be defined but not fully
        // initialized. Since we know we're in Chrome, we'll just detect this case
        // explicitly
        if (typeof window !== 'undefined' && window.process && (window.process.type === 'renderer' || window.process.__nwjs)) {
                return true;
        }

        // Internet Explorer and Edge do not support colors.
        if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
                return false;
        }

        let m;

        // Is webkit? http://stackoverflow.com/a/16459606/376773
        // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
        return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
                // Is firebug? http://stackoverflow.com/a/398120/376773
                (typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
                // Is firefox >= v31?
                // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
                (typeof navigator !== 'undefined' && navigator.userAgent && (m = navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/)) && parseInt(m[1], 10) >= 31) ||
                // Double check webkit in userAgent just in case we are in a worker
                (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
}

/**
 * Colorize log arguments if enabled.
 *
 * @api public
 */

function formatArgs(args) {
        args[0] = (this.useColors ? '%c' : '') +
                this.namespace +
                (this.useColors ? ' %c' : ' ') +
                args[0] +
                (this.useColors ? '%c ' : ' ') +
                '+' + module.exports.humanize(this.diff);

        if (!this.useColors) {
                return;
        }

        const c = 'color: ' + this.color;
        args.splice(1, 0, c, 'color: inherit');

        // The final "%c" is somewhat tricky, because there could be other
        // arguments passed either before or after the %c, so we need to
        // figure out the correct index to insert the CSS into
        let index = 0;
        let lastC = 0;
        args[0].replace(/%[a-zA-Z%]/g, match => {
                if (match === '%%') {
                        return;
                }
                index++;
                if (match === '%c') {
                        // We only are interested in the *last* %c
                        // (the user may have provided their own)
                        lastC = index;
                }
        });

        args.splice(lastC, 0, c);
}

/**
 * Invokes `console.debug()` when available.
 * No-op when `console.debug` is not a "function".
 * If `console.debug` is not available, falls back
 * to `console.log`.
 *
 * @api public
 */
exports.log = console.debug || console.log || (() => {});

/**
 * Save `namespaces`.
 *
 * @param {String} namespaces
 * @api private
 */
function save(namespaces) {
        try {
                if (namespaces) {
                        exports.storage.setItem('debug', namespaces);
                } else {
                        exports.storage.removeItem('debug');
                }
        } catch (error) {
                // Swallow
                // XXX (@Qix-) should we be logging these?
        }
}

/**
 * Load `namespaces`.
 *
 * @return {String} returns the previously persisted debug modes
 * @api private
 */
function load() {
        let r;
        try {
                r = exports.storage.getItem('debug');
        } catch (error) {
                // Swallow
                // XXX (@Qix-) should we be logging these?
        }

        // If debug isn't set in LS, and we're in Electron, try to load $DEBUG
        if (!r && typeof process !== 'undefined' && 'env' in process) {
                r = process.env.DEBUG;
        }

        return r;
}

/**
 * Localstorage attempts to return the localstorage.
 *
 * This is necessary because safari throws
 * when a user disables cookies/localstorage
 * and you attempt to access it.
 *
 * @return {LocalStorage}
 * @api private
 */

function localstorage() {
        try {
                // TVMLKit (Apple TV JS Runtime) does not have a window object, just localStorage in the global context
                // The Browser also has localStorage in the global context.
                return localStorage;
        } catch (error) {
                // Swallow
                // XXX (@Qix-) should we be logging these?
        }
}

module.exports = require('./common')(exports);

const {formatters} = module.exports;

/**
 * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
 */

formatters.j = function (v) {
        try {
                return JSON.stringify(v);
        } catch (error) {
                return '[UnexpectedJSONParseError]: ' + error.message;
        }
};