@nebular/auth/esm2015/helpers.js

@nebular/auth

/**
 * Extending object that entered in first argument.
 *
 * Returns extended object or false if have no target object or incorrect type.
 *
 * If you wish to clone source object (without modify it), just use empty new
 * object as first argument, like this:
 *   deepExtend({}, yourObj_1, [yourObj_N]);
 */
export const deepExtend = function (...objects) {
    if (arguments.length < 1 || typeof arguments[0] !== 'object') {
        return false;
    }
    if (arguments.length < 2) {
        return arguments[0];
    }
    const target = arguments[0];
    // convert arguments to array and cut off target object
    const args = Array.prototype.slice.call(arguments, 1);
    let val, src;
    args.forEach(function (obj) {
        // skip argument if it is array or isn't object
        if (typeof obj !== 'object' || Array.isArray(obj)) {
            return;
        }
        Object.keys(obj).forEach(function (key) {
            src = target[key]; // source value
            val = obj[key]; // new value
            // recursion prevention
            if (val === target) {
                return;
                /**
                 * if new value isn't object then just overwrite by new value
                 * instead of extending.
                 */
            }
            else if (typeof val !== 'object' || val === null) {
                target[key] = val;
                return;
                // just clone arrays (and recursive clone objects inside)
            }
            else if (Array.isArray(val)) {
                target[key] = deepCloneArray(val);
                return;
                // custom cloning and overwrite for specific objects
            }
            else if (isSpecificValue(val)) {
                target[key] = cloneSpecificValue(val);
                return;
                // overwrite by new value if source isn't object or array
            }
            else if (typeof src !== 'object' || src === null || Array.isArray(src)) {
                target[key] = deepExtend({}, val);
                return;
                // source value and new value is objects both, extending...
            }
            else {
                target[key] = deepExtend(src, val);
                return;
            }
        });
    });
    return target;
};
function isSpecificValue(val) {
    return (val instanceof Date
        || val instanceof RegExp) ? true : false;
}
function cloneSpecificValue(val) {
    if (val instanceof Date) {
        return new Date(val.getTime());
    }
    else if (val instanceof RegExp) {
        return new RegExp(val);
    }
    else {
        throw new Error('cloneSpecificValue: Unexpected situation');
    }
}
/**
 * Recursive cloning array.
 */
function deepCloneArray(arr) {
    const clone = [];
    arr.forEach(function (item, index) {
        if (typeof item === 'object' && item !== null) {
            if (Array.isArray(item)) {
                clone[index] = deepCloneArray(item);
            }
            else if (isSpecificValue(item)) {
                clone[index] = cloneSpecificValue(item);
            }
            else {
                clone[index] = deepExtend({}, item);
            }
        }
        else {
            clone[index] = item;
        }
    });
    return clone;
}
// getDeepFromObject({result: {data: 1}}, 'result.data', 2); // returns 1
export function getDeepFromObject(object = {}, name, defaultValue) {
    const keys = name.split('.');
    // clone the object
    let level = deepExtend({}, object || {});
    keys.forEach((k) => {
        if (level && typeof level[k] !== 'undefined') {
            level = level[k];
        }
        else {
            level = undefined;
        }
    });
    return typeof level === 'undefined' ? defaultValue : level;
}
export function urlBase64Decode(str) {
    let output = str.replace(/-/g, '+').replace(/_/g, '/');
    switch (output.length % 4) {
        case 0: {
            break;
        }
        case 2: {
            output += '==';
            break;
        }
        case 3: {
            output += '=';
            break;
        }
        default: {
            throw new Error('Illegal base64url string!');
        }
    }
    return b64DecodeUnicode(output);
}
export function b64decode(str) {
    const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
    let output = '';
    str = String(str).replace(/=+$/, '');
    if (str.length % 4 === 1) {
        throw new Error(`'atob' failed: The string to be decoded is not correctly encoded.`);
    }
    for (
    // initialize result and counters
    let bc = 0, bs, buffer, idx = 0; 
    // get next character
    buffer = str.charAt(idx++); 
    // character found in table? initialize bit storage and add its ascii value;
    ~buffer && (bs = bc % 4 ? bs * 64 + buffer : buffer,
        // and if not first of each 4 characters,
        // convert the first 8 bits to one ascii character
        bc++ % 4) ? output += String.fromCharCode(255 & bs >> (-2 * bc & 6)) : 0) {
        // try to find character in table (0-63, not found => -1)
        buffer = chars.indexOf(buffer);
    }
    return output;
}
// https://developer.mozilla.org/en/docs/Web/API/WindowBase64/Base64_encoding_and_decoding#The_Unicode_Problem
export function b64DecodeUnicode(str) {
    return decodeURIComponent(Array.prototype.map.call(b64decode(str), (c) => {
        return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2);
    }).join(''));
}
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