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import getTag from '../internal/get-tag';
const objectCtorString = Function.prototype.toString.call(Object);
/**
* @memberOf BX
*/
export default class Type
{
/**
* Checks that value is string
* @param value
* @return {boolean}
*/
static isString(value: any): boolean
{
return typeof value === 'string';
}
/**
* Returns true if a value is not empty string
* @param value
* @returns {boolean}
*/
static isStringFilled(value: any): boolean
{
return this.isString(value) && value !== '';
}
/**
* Checks that value is function
* @param value
* @return {boolean}
*/
static isFunction(value: any): boolean
{
return typeof value === 'function';
}
/**
* Checks that value is object
* @param value
* @return {boolean}
*/
static isObject(value: any): boolean
{
return !!value && (typeof value === 'object' || typeof value === 'function');
}
/**
* Checks that value is object like
* @param value
* @return {boolean}
*/
static isObjectLike(value: any): boolean
{
return !!value && typeof value === 'object';
}
/**
* Checks that value is plain object
* @param value
* @return {boolean}
*/
static isPlainObject(value: any): boolean
{
if (!Type.isObjectLike(value) || getTag(value) !== '[object Object]')
{
return false;
}
const proto = Object.getPrototypeOf(value);
if (proto === null)
{
return true;
}
const ctor = proto.hasOwnProperty('constructor') && proto.constructor;
return (
typeof ctor === 'function' &&
Function.prototype.toString.call(ctor) === objectCtorString
);
}
/**
* Checks that value is boolean
* @param value
* @return {boolean}
*/
static isBoolean(value: any): boolean
{
return value === true || value === false;
}
/**
* Checks that value is number
* @param value
* @return {boolean}
*/
static isNumber(value: any): boolean
{
return !Number.isNaN(value) && typeof value === 'number';
}
/**
* Checks that value is integer
* @param value
* @return {boolean}
*/
static isInteger(value: any): boolean
{
return Type.isNumber(value) && (value % 1) === 0;
}
/**
* Checks that value is float
* @param value
* @return {boolean}
*/
static isFloat(value: any): boolean
{
return Type.isNumber(value) && !Type.isInteger(value);
}
/**
* Checks that value is nil
* @param value
* @return {boolean}
*/
static isNil(value: any): boolean
{
return value === null || value === undefined;
}
/**
* Checks that value is array
* @param value
* @return {boolean}
*/
static isArray(value: any): boolean
{
return !Type.isNil(value) && Array.isArray(value);
}
/**
* Returns true if a value is an array and it has at least one element
* @param value
* @returns {boolean}
*/
static isArrayFilled(value: any): boolean
{
return this.isArray(value) && value.length > 0;
}
/**
* Checks that value is array like
* @param value
* @return {boolean}
*/
static isArrayLike(value: any): boolean
{
return (
!Type.isNil(value)
&& !Type.isFunction(value)
&& value.length > -1
&& value.length <= Number.MAX_SAFE_INTEGER
);
}
/**
* Checks that value is Date
* @param value
* @return {boolean}
*/
static isDate(value: any): boolean
{
return Type.isObjectLike(value) && getTag(value) === '[object Date]';
}
/**
* Checks that is DOM node
* @param value
* @return {boolean}
*/
static isDomNode(value: any): boolean
{
return Type.isObjectLike(value) && !Type.isPlainObject(value) && 'nodeType' in value;
}
/**
* Checks that value is element node
* @param value
* @return {boolean}
*/
static isElementNode(value: any): boolean
{
return Type.isDomNode(value) && value.nodeType === Node.ELEMENT_NODE;
}
/**
* Checks that value is text node
* @param value
* @return {boolean}
*/
static isTextNode(value: any): boolean
{
return Type.isDomNode(value) && value.nodeType === Node.TEXT_NODE;
}
/**
* Checks that value is Map
* @param value
* @return {boolean}
*/
static isMap(value: any): boolean
{
return Type.isObjectLike(value) && getTag(value) === '[object Map]';
}
/**
* Checks that value is Set
* @param value
* @return {boolean}
*/
static isSet(value: any): boolean
{
return Type.isObjectLike(value) && getTag(value) === '[object Set]';
}
/**
* Checks that value is WeakMap
* @param value
* @return {boolean}
*/
static isWeakMap(value: any): boolean
{
return Type.isObjectLike(value) && getTag(value) === '[object WeakMap]';
}
/**
* Checks that value is WeakSet
* @param value
* @return {boolean}
*/
static isWeakSet(value: any): boolean
{
return Type.isObjectLike(value) && getTag(value) === '[object WeakSet]';
}
/**
* Checks that value is prototype
* @param value
* @return {boolean}
*/
static isPrototype(value: any): boolean
{
return (
(((typeof (value && value.constructor) === 'function') && value.constructor.prototype) || Object.prototype) === value
);
}
/**
* Checks that value is regexp
* @param value
* @return {boolean}
*/
static isRegExp(value: any): boolean
{
return Type.isObjectLike(value) && getTag(value) === '[object RegExp]';
}
/**
* Checks that value is null
* @param value
* @return {boolean}
*/
static isNull(value: any): boolean
{
return value === null;
}
/**
* Checks that value is undefined
* @param value
* @return {boolean}
*/
static isUndefined(value: any): boolean
{
return typeof value === 'undefined';
}
/**
* Checks that value is ArrayBuffer
* @param value
* @return {boolean}
*/
static isArrayBuffer(value: any): boolean
{
return Type.isObjectLike(value) && getTag(value) === '[object ArrayBuffer]';
}
/**
* Checks that value is typed array
* @param value
* @return {boolean}
*/
static isTypedArray(value: any): boolean
{
const regExpTypedTag = (
/^\[object (?:Float(?:32|64)|(?:Int|Uint)(?:8|16|32)|Uint8Clamped)]$/
);
return Type.isObjectLike(value) && regExpTypedTag.test(getTag(value));
}
/**
* Checks that value is Blob
* @param value
* @return {boolean}
*/
static isBlob(value: any): boolean
{
return (
Type.isObjectLike(value)
&& Type.isNumber(value.size)
&& Type.isString(value.type)
&& Type.isFunction(value.slice)
);
}
/**
* Checks that value is File
* @param value
* @return {boolean}
*/
static isFile(value: any): boolean
{
return (
Type.isBlob(value)
&& Type.isObjectLike(value.lastModifiedDate)
&& Type.isNumber(value.lastModified)
&& Type.isString(value.name)
);
}
/**
* Checks that value is FormData
* @param value
* @return {boolean}
*/
static isFormData(value: any)
{
return value instanceof FormData;
}
}