gaf-mobile/app/bower_components/raven-js/src/utils.js

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'use strict';

var objectPrototype = Object.prototype;

function isUndefined(what) {
    return what === void 0;
}

function isFunction(what) {
    return typeof what === 'function';
}

function isString(what) {
    return objectPrototype.toString.call(what) === '[object String]';
}

function isObject(what) {
    return typeof what === 'object' && what !== null;
}

function isEmptyObject(what) {
    for (var _ in what) return false;  // eslint-disable-line guard-for-in, no-unused-vars
    return true;
}

// Sorta yanked from https://github.com/joyent/node/blob/aa3b4b4/lib/util.js#L560
// with some tiny modifications
function isError(what) {
    return isObject(what) &&
        objectPrototype.toString.call(what) === '[object Error]' ||
        what instanceof Error;
}

function each(obj, callback) {
    var i, j;

    if (isUndefined(obj.length)) {
        for (i in obj) {
            if (hasKey(obj, i)) {
                callback.call(null, i, obj[i]);
            }
        }
    } else {
        j = obj.length;
        if (j) {
            for (i = 0; i < j; i++) {
                callback.call(null, i, obj[i]);
            }
        }
    }
}

function objectMerge(obj1, obj2) {
    if (!obj2) {
        return obj1;
    }
    each(obj2, function(key, value){
        obj1[key] = value;
    });
    return obj1;
}

function truncate(str, max) {
    return !max || str.length <= max ? str : str.substr(0, max) + '\u2026';
}

/**
 * hasKey, a better form of hasOwnProperty
 * Example: hasKey(MainHostObject, property) === true/false
 *
 * @param {Object} host object to check property
 * @param {string} key to check
 */
function hasKey(object, key) {
    return objectPrototype.hasOwnProperty.call(object, key);
}

function joinRegExp(patterns) {
    // Combine an array of regular expressions and strings into one large regexp
    // Be mad.
    var sources = [],
        i = 0, len = patterns.length,
        pattern;

    for (; i < len; i++) {
        pattern = patterns[i];
        if (isString(pattern)) {
            // If it's a string, we need to escape it
            // Taken from: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
            sources.push(pattern.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, '\\$1'));
        } else if (pattern && pattern.source) {
            // If it's a regexp already, we want to extract the source
            sources.push(pattern.source);
        }
        // Intentionally skip other cases
    }
    return new RegExp(sources.join('|'), 'i');
}

function urlencode(o) {
    var pairs = [];
    each(o, function(key, value) {
        pairs.push(encodeURIComponent(key) + '=' + encodeURIComponent(value));
    });
    return pairs.join('&');
}

function uuid4() {
    var crypto = window.crypto || window.msCrypto;

    if (!isUndefined(crypto) && crypto.getRandomValues) {
        // Use window.crypto API if available
        var arr = new Uint16Array(8);
        crypto.getRandomValues(arr);

        // set 4 in byte 7
        arr[3] = arr[3] & 0xFFF | 0x4000;
        // set 2 most significant bits of byte 9 to '10'
        arr[4] = arr[4] & 0x3FFF | 0x8000;

        var pad = function(num) {
            var v = num.toString(16);
            while (v.length < 4) {
                v = '0' + v;
            }
            return v;
        };

        return pad(arr[0]) + pad(arr[1]) + pad(arr[2]) + pad(arr[3]) + pad(arr[4]) +
        pad(arr[5]) + pad(arr[6]) + pad(arr[7]);
    } else {
        // http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/2117523#2117523
        return 'xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
            var r = Math.random()*16|0,
                v = c === 'x' ? r : r&0x3|0x8;
            return v.toString(16);
        });
    }
}

module.exports = {
    isUndefined: isUndefined,
    isFunction: isFunction,
    isString: isString,
    isObject: isObject,
    isEmptyObject: isEmptyObject,
    isError: isError,
    each: each,
    objectMerge: objectMerge,
    truncate: truncate,
    hasKey: hasKey,
    joinRegExp: joinRegExp,
    urlencode: urlencode,
    uuid4: uuid4
};