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Diffstat (limited to 'node_modules/locutus/php/var/is_callable.js')
| -rw-r--r-- | node_modules/locutus/php/var/is_callable.js | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/node_modules/locutus/php/var/is_callable.js b/node_modules/locutus/php/var/is_callable.js new file mode 100644 index 0000000..962d742 --- /dev/null +++ b/node_modules/locutus/php/var/is_callable.js @@ -0,0 +1,84 @@ +'use strict'; + +var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; + +module.exports = function is_callable(mixedVar, syntaxOnly, callableName) { + // eslint-disable-line camelcase + // discuss at: http://locutus.io/php/is_callable/ + // original by: Brett Zamir (http://brett-zamir.me) + // input by: François + // improved by: Brett Zamir (http://brett-zamir.me) + // note 1: The variable callableName cannot work as a string variable passed by + // note 1: reference as in PHP (since JavaScript does not support passing + // note 1: strings by reference), but instead will take the name of + // note 1: a global variable and set that instead. + // note 1: When used on an object, depends on a constructor property + // note 1: being kept on the object prototype + // note 2: Depending on the `callableName` that is passed, this function can use eval. + // note 2: The eval input is however checked to only allow valid function names, + // note 2: So it should not be unsafer than uses without eval (seeing as you can) + // note 2: already pass any function to be executed here. + // example 1: is_callable('is_callable') + // returns 1: true + // example 2: is_callable('bogusFunction', true) + // returns 2: true // gives true because does not do strict checking + // example 3: function SomeClass () {} + // example 3: SomeClass.prototype.someMethod = function (){} + // example 3: var testObj = new SomeClass() + // example 3: is_callable([testObj, 'someMethod'], true, 'myVar') + // example 3: var $result = myVar + // returns 3: 'SomeClass::someMethod' + // example 4: is_callable(function () {}) + // returns 4: true + + var $global = typeof window !== 'undefined' ? window : global; + + var validJSFunctionNamePattern = /^[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*$/; + + var name = ''; + var obj = {}; + var method = ''; + var validFunctionName = false; + + var getFuncName = function getFuncName(fn) { + var name = /\W*function\s+([\w$]+)\s*\(/.exec(fn); + if (!name) { + return '(Anonymous)'; + } + return name[1]; + }; + + if (typeof mixedVar === 'string') { + obj = $global; + method = mixedVar; + name = mixedVar; + validFunctionName = !!name.match(validJSFunctionNamePattern); + } else if (typeof mixedVar === 'function') { + return true; + } else if (Object.prototype.toString.call(mixedVar) === '[object Array]' && mixedVar.length === 2 && _typeof(mixedVar[0]) === 'object' && typeof mixedVar[1] === 'string') { + obj = mixedVar[0]; + method = mixedVar[1]; + name = (obj.constructor && getFuncName(obj.constructor)) + '::' + method; + } else { + return false; + } + + if (syntaxOnly || typeof obj[method] === 'function') { + if (callableName) { + $global[callableName] = name; + } + return true; + } + + // validFunctionName avoids exploits + if (validFunctionName && typeof eval(method) === 'function') { + // eslint-disable-line no-eval + if (callableName) { + $global[callableName] = name; + } + return true; + } + + return false; +}; +//# sourceMappingURL=is_callable.js.map
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