simbo/validate-by-shorthand

'use strict';

var util = require('util');

var utilTests = {
        'array': 'isArray',
        'boolean': 'isBoolean',
        'null': 'isNull',
        'nullorundefined': 'isNullOrUndefined',
        'number': 'isNumber',
        'string': 'isString',
        'symbol': 'isSymbol',
        'undefined': 'isUndefined',
        'regexp': 'isRegExp',
        'object': 'isObject',
        'date': 'isDate',
        'error': 'isError',
        'function': 'isFunction',
        'primitive': 'isPrimitive',
        'buffer': 'isBuffer'
    },

    utilTestKeys = Object.keys(utilTests),

    customTests = {
        any: function() {
            return true;
        },
        'string!empty': function(value) {
            return util.isString(value) && value.length > 0;
        },
        'array!empty': function(value) {
            return util.isArray(value) && value.length > 0;
        },
        'object!empty': function(value) {
            return util.isObject(value) && Object.keys(value).length > 0;
        },
        'number>0': function(value) {
            return util.isNumber(value) && value > 0;
        },
        'number>=0': function(value) {
            return util.isNumber(value) && value >= 0;
        },
        'number<0': function(value) {
            return util.isNumber(value) && value < 0;
        },
        'number<=0': function(value) {
            return util.isNumber(value) && value <= 0;
        },
        integer: function(value) {
            return util.isNumber(value) && value % 1 === 0;
        },
        float: function(value) {
            return util.isNumber(value) && value % 1 !== 0;
        }
    },

    customTestKeys = Object.keys(customTests),

    excludeFromExtend = [
        'any',
        'null',
        'undefined',
        'nullorundefined'
    ],

    isType = utilTestKeys.concat(customTestKeys).filter(function(type) {
        return excludeFromExtend.indexOf(type) === -1;
    }).reduce(function(is, type) {
        is[type + '[]'] = function(values) {
            return util.isArray(values) && values.every(is[type]);
        };
        is[type + '{}'] = function(values) {
            return util.isObject(values) && Object.keys(values).every(function(key) {
                return is[type](values[key]);
            });
        };
        return is;
    }, utilTestKeys.reduce(function(is, type) {
        is[type] = util[utilTests[type]];
        return is;
    }, customTests));

module.exports = isType;