/node_modules/lodash.template/index.js

/**

 * lodash 3.6.2 (Custom Build) <https://lodash.com/>

 * Build: `lodash modern modularize exports="npm" -o ./`

 * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>

 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>

 * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors

 * Available under MIT license <https://lodash.com/license>

 */

var baseCopy = require('lodash._basecopy'),

    baseToString = require('lodash._basetostring'),

    baseValues = require('lodash._basevalues'),

    isIterateeCall = require('lodash._isiterateecall'),

    reInterpolate = require('lodash._reinterpolate'),

    keys = require('lodash.keys'),

    restParam = require('lodash.restparam'),

    templateSettings = require('lodash.templatesettings');



/** `Object#toString` result references. */

var errorTag = '[object Error]';



/** Used to match empty string literals in compiled template source. */

var reEmptyStringLeading = /\b__p \+= '';/g,

    reEmptyStringMiddle = /\b(__p \+=) '' \+/g,

    reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;



/** Used to match [ES template delimiters](http://ecma-international.org/ecma-262/6.0/#sec-template-literal-lexical-components). */

var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;



/** Used to ensure capturing order of template delimiters. */

var reNoMatch = /($^)/;



/** Used to match unescaped characters in compiled string literals. */

var reUnescapedString = /['\n\r\u2028\u2029\\]/g;



/** Used to escape characters for inclusion in compiled string literals. */

var stringEscapes = {

  '\\': '\\',

  "'": "'",

  '\n': 'n',

  '\r': 'r',

  '\u2028': 'u2028',

  '\u2029': 'u2029'

};



/**

 * Used by `_.template` to escape characters for inclusion in compiled string literals.

 *

 * @private

 * @param {string} chr The matched character to escape.

 * @returns {string} Returns the escaped character.

 */

function escapeStringChar(chr) {

  return '\\' + stringEscapes[chr];

}



/**

 * Checks if `value` is object-like.

 *

 * @private

 * @param {*} value The value to check.

 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.

 */

function isObjectLike(value) {

  return !!value && typeof value == 'object';

}



/** Used for native method references. */

var objectProto = Object.prototype;



/** Used to check objects for own properties. */

var hasOwnProperty = objectProto.hasOwnProperty;



/**

 * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)

 * of values.

 */

var objToString = objectProto.toString;



/**

 * Used by `_.template` to customize its `_.assign` use.

 *

 * **Note:** This function is like `assignDefaults` except that it ignores

 * inherited property values when checking if a property is `undefined`.

 *

 * @private

 * @param {*} objectValue The destination object property value.

 * @param {*} sourceValue The source object property value.

 * @param {string} key The key associated with the object and source values.

 * @param {Object} object The destination object.

 * @returns {*} Returns the value to assign to the destination object.

 */

function assignOwnDefaults(objectValue, sourceValue, key, object) {

  return (objectValue === undefined || !hasOwnProperty.call(object, key))

    ? sourceValue

    : objectValue;

}



/**

 * A specialized version of `_.assign` for customizing assigned values without

 * support for argument juggling, multiple sources, and `this` binding `customizer`

 * functions.

 *

 * @private

 * @param {Object} object The destination object.

 * @param {Object} source The source object.

 * @param {Function} customizer The function to customize assigned values.

 * @returns {Object} Returns `object`.

 */

function assignWith(object, source, customizer) {

  var index = -1,

      props = keys(source),

      length = props.length;



  while (++index < length) {

    var key = props[index],

        value = object[key],

        result = customizer(value, source[key], key, object, source);



    if ((result === result ? (result !== value) : (value === value)) ||

        (value === undefined && !(key in object))) {

      object[key] = result;

    }

  }

  return object;

}



/**

 * The base implementation of `_.assign` without support for argument juggling,

 * multiple sources, and `customizer` functions.

 *

 * @private

 * @param {Object} object The destination object.

 * @param {Object} source The source object.

 * @returns {Object} Returns `object`.

 */

function baseAssign(object, source) {

  return source == null

    ? object

    : baseCopy(source, keys(source), object);

}



/**

 * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,

 * `SyntaxError`, `TypeError`, or `URIError` object.

 *

 * @static

 * @memberOf _

 * @category Lang

 * @param {*} value The value to check.

 * @returns {boolean} Returns `true` if `value` is an error object, else `false`.

 * @example

 *

 * _.isError(new Error);

 * // => true

 *

 * _.isError(Error);

 * // => false

 */

function isError(value) {

  return isObjectLike(value) && typeof value.message == 'string' && objToString.call(value) == errorTag;

}



/**

 * Creates a compiled template function that can interpolate data properties

 * in "interpolate" delimiters, HTML-escape interpolated data properties in

 * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data

 * properties may be accessed as free variables in the template. If a setting

 * object is provided it takes precedence over `_.templateSettings` values.

 *

 * **Note:** In the development build `_.template` utilizes

 * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)

 * for easier debugging.

 *

 * For more information on precompiling templates see

 * [lodash's custom builds documentation](https://lodash.com/custom-builds).

 *

 * For more information on Chrome extension sandboxes see

 * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).

 *

 * @static

 * @memberOf _

 * @category String

 * @param {string} [string=''] The template string.

 * @param {Object} [options] The options object.

 * @param {RegExp} [options.escape] The HTML "escape" delimiter.

 * @param {RegExp} [options.evaluate] The "evaluate" delimiter.

 * @param {Object} [options.imports] An object to import into the template as free variables.

 * @param {RegExp} [options.interpolate] The "interpolate" delimiter.

 * @param {string} [options.sourceURL] The sourceURL of the template's compiled source.

 * @param {string} [options.variable] The data object variable name.

 * @param- {Object} [otherOptions] Enables the legacy `options` param signature.

 * @returns {Function} Returns the compiled template function.

 * @example

 *

 * // using the "interpolate" delimiter to create a compiled template

 * var compiled = _.template('hello <%= user %>!');

 * compiled({ 'user': 'fred' });

 * // => 'hello fred!'

 *

 * // using the HTML "escape" delimiter to escape data property values

 * var compiled = _.template('<b><%- value %></b>');

 * compiled({ 'value': '<script>' });

 * // => '<b>&lt;script&gt;</b>'

 *

 * // using the "evaluate" delimiter to execute JavaScript and generate HTML

 * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');

 * compiled({ 'users': ['fred', 'barney'] });

 * // => '<li>fred</li><li>barney</li>'

 *

 * // using the internal `print` function in "evaluate" delimiters

 * var compiled = _.template('<% print("hello " + user); %>!');

 * compiled({ 'user': 'barney' });

 * // => 'hello barney!'

 *

 * // using the ES delimiter as an alternative to the default "interpolate" delimiter

 * var compiled = _.template('hello ${ user }!');

 * compiled({ 'user': 'pebbles' });

 * // => 'hello pebbles!'

 *

 * // using custom template delimiters

 * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;

 * var compiled = _.template('hello {{ user }}!');

 * compiled({ 'user': 'mustache' });

 * // => 'hello mustache!'

 *

 * // using backslashes to treat delimiters as plain text

 * var compiled = _.template('<%= "\\<%- value %\\>" %>');

 * compiled({ 'value': 'ignored' });

 * // => '<%- value %>'

 *

 * // using the `imports` option to import `jQuery` as `jq`

 * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';

 * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });

 * compiled({ 'users': ['fred', 'barney'] });

 * // => '<li>fred</li><li>barney</li>'

 *

 * // using the `sourceURL` option to specify a custom sourceURL for the template

 * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });

 * compiled(data);

 * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector

 *

 * // using the `variable` option to ensure a with-statement isn't used in the compiled template

 * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });

 * compiled.source;

 * // => function(data) {

 * //   var __t, __p = '';

 * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';

 * //   return __p;

 * // }

 *

 * // using the `source` property to inline compiled templates for meaningful

 * // line numbers in error messages and a stack trace

 * fs.writeFileSync(path.join(cwd, 'jst.js'), '\

 *   var JST = {\

 *     "main": ' + _.template(mainText).source + '\

 *   };\

 * ');

 */

function template(string, options, otherOptions) {

  // Based on John Resig's `tmpl` implementation (http://ejohn.org/blog/javascript-micro-templating/)

  // and Laura Doktorova's doT.js (https://github.com/olado/doT).

  var settings = templateSettings.imports._.templateSettings || templateSettings;



  if (otherOptions && isIterateeCall(string, options, otherOptions)) {

    options = otherOptions = undefined;

  }

  string = baseToString(string);

  options = assignWith(baseAssign({}, otherOptions || options), settings, assignOwnDefaults);



  var imports = assignWith(baseAssign({}, options.imports), settings.imports, assignOwnDefaults),

      importsKeys = keys(imports),

      importsValues = baseValues(imports, importsKeys);



  var isEscaping,

      isEvaluating,

      index = 0,

      interpolate = options.interpolate || reNoMatch,

      source = "__p += '";



  // Compile the regexp to match each delimiter.

  var reDelimiters = RegExp(

    (options.escape || reNoMatch).source + '|' +

    interpolate.source + '|' +

    (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +

    (options.evaluate || reNoMatch).source + '|$'

  , 'g');



  // Use a sourceURL for easier debugging.

  var sourceURL = 'sourceURL' in options ? '//# sourceURL=' + options.sourceURL + '\n' : '';



  string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {

    interpolateValue || (interpolateValue = esTemplateValue);



    // Escape characters that can't be included in string literals.

    source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);



    // Replace delimiters with snippets.

    if (escapeValue) {

      isEscaping = true;

      source += "' +\n__e(" + escapeValue + ") +\n'";

    }

    if (evaluateValue) {

      isEvaluating = true;

      source += "';\n" + evaluateValue + ";\n__p += '";

    }

    if (interpolateValue) {

      source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";

    }

    index = offset + match.length;



    // The JS engine embedded in Adobe products requires returning the `match`

    // string in order to produce the correct `offset` value.

    return match;

  });



  source += "';\n";



  // If `variable` is not specified wrap a with-statement around the generated

  // code to add the data object to the top of the scope chain.

  var variable = options.variable;

  if (!variable) {

    source = 'with (obj) {\n' + source + '\n}\n';

  }

  // Cleanup code by stripping empty strings.

  source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)

    .replace(reEmptyStringMiddle, '$1')

    .replace(reEmptyStringTrailing, '$1;');



  // Frame code as the function body.

  source = 'function(' + (variable || 'obj') + ') {\n' +

    (variable

      ? ''

      : 'obj || (obj = {});\n'

    ) +

    "var __t, __p = ''" +

    (isEscaping

       ? ', __e = _.escape'

       : ''

    ) +

    (isEvaluating

      ? ', __j = Array.prototype.join;\n' +

        "function print() { __p += __j.call(arguments, '') }\n"

      : ';\n'

    ) +

    source +

    'return __p\n}';



  var result = attempt(function() {

    return Function(importsKeys, sourceURL + 'return ' + source).apply(undefined, importsValues);

  });



  // Provide the compiled function's source by its `toString` method or

  // the `source` property as a convenience for inlining compiled templates.

  result.source = source;

  if (isError(result)) {

    throw result;

  }

  return result;

}



/**

 * Attempts to invoke `func`, returning either the result or the caught error

 * object. Any additional arguments are provided to `func` when it is invoked.

 *

 * @static

 * @memberOf _

 * @category Utility

 * @param {Function} func The function to attempt.

 * @returns {*} Returns the `func` result or error object.

 * @example

 *

 * // avoid throwing errors for invalid selectors

 * var elements = _.attempt(function(selector) {

 *   return document.querySelectorAll(selector);

 * }, '>_>');

 *

 * if (_.isError(elements)) {

 *   elements = [];

 * }

 */

var attempt = restParam(function(func, args) {

  try {

    return func.apply(undefined, args);

  } catch(e) {

    return isError(e) ? e : new Error(e);

  }

});



module.exports = template;