[Chromoting] Move shared webapp JS files from crd/js -> base/js

remoting/webapp/crd/js/typecheck.js

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-
-/** @suppress {duplicate} */
-var remoting = remoting || {};
-
-(function() {
-'use strict';
-
-/**
- * @param {*} value
- * @return {boolean}
- */
-var isArray = function(value) {
-  return Array.isArray(value);
-};
-
-/**
- * @param {*} value
- * @return {boolean}
- */
-var isBoolean = function(value) {
-  return typeof value == 'boolean';
-};
-
-/**
- * @param {*} value
- * @return {boolean}
- */
-var isNumber = function(value) {
-  return typeof value == 'number';
-};
-
-/**
- * @param {*} value
- * @return {boolean}
- */
-var isObject = function(value) {
-  return value != null && typeof value == 'object' && !Array.isArray(value);
-};
-
-/**
- * @param {*} value
- * @return {boolean}
- */
-var isString = function(value) {
-  return typeof value == 'string';
-};
-
-/**
- * @param {*} value
- * @return {string}
- */
-var jsonTypeOf = function(value) {
-  if (typeof value == 'object') {
-    if (value === null) {
-      return 'null';
-    } else if (Array.isArray(value)) {
-      return 'array';
-    } else {
-      return 'object';
-    }
-  } else {
-    return typeof value;
-  }
-};
-
-/**
- * @param {*} value the value to check; must be an object
- * @param {function(*):boolean} pred
- * @param {string} typeDesc
- * @return {*} the argument
- */
-var assertType = function(value, pred, typeDesc) {
-  if (pred(value)) {
-    return value;
-  } else {
-    throw new Error('Invalid data type' +
-                    ' (expected: ' + typeDesc +
-                    ', actual: ' + jsonTypeOf(value) + ')');
-  }
-};
-
-/**
- * @param {*} value the value to check; must be an object
- * @return {!Array} the argument
- */
-base.assertArray = function(value) {
-  return /** @type {!Array} */ (assertType(value, isArray, 'array'));
-};
-
-/**
- * @param {*} value the value to check; must be a boolean
- * @return {boolean} the argument
- */
-base.assertBoolean = function(value) {
-  return /** @type {boolean} */ (assertType(value, isBoolean, 'boolean'));
-};
-
-/**
- * @param {*} value the value to check; must be a number
- * @return {number} the argument
- */
-base.assertNumber = function(value) {
-  return /** @type {number} */ (assertType(value, isNumber, 'number'));
-};
-
-/**
- * @param {*} value the value to check; must be an object
- * @return {!Object} the argument
- */
-base.assertObject = function(value) {
-  return /** @type {!Object} */ (assertType(value, isObject, 'object'));
-};
-
-/**
- * @param {*} value the value to check; must be a string
- * @return {string} the argument
- */
-base.assertString = function(value) {
-  return /** @type {string} */ (assertType(value, isString, 'string'));
-};
-
-/**
- * @param {Object<string,*>} dict The dictionary containing the |key|
- * @param {string} key The key to typecheck in the |dict|.
- * @param {function(*):boolean} pred
- * @param {string} typeDesc
- * @param {*=} opt_default The value to return if pred returns false.
- * @return {*} The |key| attribute value.
- */
-var getTypedAttr = function(dict, key, pred, typeDesc, opt_default) {
-  var value = /** @type {*} */ (dict[key]);
-  if (pred(value)) {
-    return value;
-  } else if (opt_default !== undefined) {
-    return opt_default;
-  } else {
-    throw new Error('Invalid data type for ' + key +
-                    ' (expected: ' + typeDesc + ', actual: ' +
-                    jsonTypeOf(value) + ')');
-  }
-};
-
-/**
- * Get the |key| attribute in the given |dict| and verify that it is an
- * array value.
- *
- * If the attribute is not an array, then an exception will be thrown unless
- * a default value is specified in |opt_default|.
- *
- * @param {Object<string,*>} dict The dictionary containing the |key|
- * @param {string} key The key to typecheck in the |dict|.
- * @param {Array=} opt_default The value to return if the key is not a bool.
- * @return {Array} The |key| attribute value as an object.
- */
-base.getArrayAttr = function(dict, key, opt_default) {
-  return /** @type {Array} */ (
-      getTypedAttr(dict, key, isArray, 'array', opt_default));
-};
-
-/**
- * Get the |key| attribute in the given |dict| and verify that it is a
- * boolean value.
- *
- * If the attribute is not a boolean, then an exception will be thrown unless
- * a default value is specified in |opt_default|.
- *
- * @param {Object<string,*>} dict The dictionary containing the |key|
- * @param {string} key The key to typecheck in the |dict|.
- * @param {boolean=} opt_default The value to return if the key is not a bool.
- * @return {boolean} The |key| attribute value as a boolean.
- */
-base.getBooleanAttr = function(dict, key, opt_default) {
-  var value = /** @type {*} */ (dict[key]);
-  if (value == 'true' || value == 'false') {
-    return value == 'true';
-  }
-  return /** @type {boolean} */ (
-      getTypedAttr(dict, key, isBoolean, 'boolean', opt_default));
-};
-
-/**
- * Get the |key| attribute in the given |dict| and verify that it is a
- * number value.
- *
- * If the attribute is not a number, then an exception will be thrown unless
- * a default value is specified in |opt_default|.
- *
- * @param {Object<string,*>} dict The dictionary containing the |key|
- * @param {string} key The key to typecheck in the |dict|.
- * @param {number=} opt_default The value to return if the key is not a number.
- * @return {number} The |key| attribute value as a number.
- */
-base.getNumberAttr = function(dict, key, opt_default) {
-  return /** @type {number} */ (
-      getTypedAttr(dict, key, isNumber, 'number', opt_default));
-};
-
-/**
- * Get the |key| attribute in the given |dict| and verify that it is an
- * object value.
- *
- * If the attribute is not an object, then an exception will be thrown unless
- * a default value is specified in |opt_default|.
- *
- * @param {Object<string,*>} dict The dictionary containing the |key|
- * @param {string} key The key to typecheck in the |dict|.
- * @param {Object=} opt_default The value to return if the key is not a bool.
- * @return {!Object} The |key| attribute value as an object.
- */
-base.getObjectAttr = function(dict, key, opt_default) {
-  return /** @type {!Object} */ (
-      getTypedAttr(dict, key, isObject, 'object', opt_default));
-};
-
-/**
- * Get the |key| attribute in the given |dict| and verify that it is a
- * string value.
- *
- * If the attribute is not a string, then an exception will be thrown unless
- * a default value is specified in |opt_default|.
- *
- * @param {Object<string,*>} dict The dictionary containing the |key|
- * @param {string} key The key to typecheck in the |dict|.
- * @param {string=} opt_default The value to return if the key is not a string.
- * @return {string} The |key| attribute value as a string.
- */
-base.getStringAttr = function(dict, key, opt_default) {
-  return /** @type {string} */ (
-      getTypedAttr(dict, key, isString, 'string', opt_default));
-};
-
-/**
- * Return a JSON object parsed from a string.
- *
- * If the string cannot be parsed, or does not result in an object, then an
- * exception will be thrown.
- *
- * @param {string} jsonString The JSON string to parse.
- * @return {Object} The JSON object created from the |jsonString|.
- */
-base.getJsonObjectFromString = function(jsonString) {
-  return base.assertObject(base.jsonParseSafe(jsonString));
-};
-
-})();