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// Licensed to the Software Freedom Conservancy (SFC) under one
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// or more contributor license agreements.  See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership.  The SFC licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License.  You may obtain a copy of the License at
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//
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//   http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied.  See the License for the
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// specific language governing permissions and limitations
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// under the License.
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/**
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 * @fileoverview Provides JSON utilities that uses native JSON parsing where
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 * possible (a feature not currently offered by Closure).
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 */
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goog.provide('bot.json');
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goog.require('bot.userAgent');
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goog.require('goog.json');
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goog.require('goog.userAgent');
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/**
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 * @define {boolean} NATIVE_JSON indicates whether the code should rely on the
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 * native `JSON` functions, if available.
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 *
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 * <p>The JSON functions can be defined by external libraries like Prototype
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 * and setting this flag to false forces the use of Closure's goog.json
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 * implementation.
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 *
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 * <p>If your JavaScript can be loaded by a third_party site and you are wary
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 * about relying on the native functions, specify
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 * "--define bot.json.NATIVE_JSON=false" to the Closure compiler.
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 */
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bot.json.NATIVE_JSON = true;
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/**
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 * Whether the current browser supports the native JSON interface.
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 * @const
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 * @see http://caniuse.com/#search=JSON
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 * @private {boolean}
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 */
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bot.json.SUPPORTS_NATIVE_JSON_ =
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    // List WebKit first since every supported version supports
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    // native JSON (and we can compile away large chunks of code for
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    // individual fragments by setting the appropriate compiler flags).
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    goog.userAgent.WEBKIT ||
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    (goog.userAgent.GECKO && bot.userAgent.isEngineVersion(3.5)) ||
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    (goog.userAgent.IE && bot.userAgent.isEngineVersion(8));
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/**
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 * Converts a JSON object to its string representation.
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 * @param {*} jsonObj The input object.
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 * @param {?(function(string, *): *)=} opt_replacer A replacer function called
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 *     for each (key, value) pair that determines how the value should be
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 *     serialized. By default, this just returns the value and allows default
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 *     serialization to kick in.
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 * @return {string} A JSON string representation of the input object.
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 */
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bot.json.stringify = bot.json.NATIVE_JSON && bot.json.SUPPORTS_NATIVE_JSON_ ?
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    JSON.stringify : goog.json.serialize;
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/**
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 * Parses a JSON string and returns the result.
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 * @param {string} jsonStr The string to parse.
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 * @return {*} The JSON object.
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 * @throws {Error} If the input string is an invalid JSON string.
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 */
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bot.json.parse = JSON.parse;
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