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 /*!
  * mustache.js - Logic-less {{mustache}} templates with JavaScript
  * http://github.com/janl/mustache.js
  */
 
 /*global define: false Mustache: true*/
 
 (function defineMustache (global, factory) {
   if (typeof exports === 'object' && exports && typeof exports.nodeName !== 'string') {
     factory(exports); // CommonJS
   } else if (typeof define === 'function' && define.amd) {
     define(['exports'], factory); // AMD
   } else {
     global.Mustache = {};
     factory(global.Mustache); // script, wsh, asp
   }
 }(this, function mustacheFactory (mustache) {
 
   var objectToString = Object.prototype.toString;
   var isArray = Array.isArray || function isArrayPolyfill (object) {
     return objectToString.call(object) === '[object Array]';
   };
 
   function isFunction (object) {
     return typeof object === 'function';
   }
 
   /**
    * More correct typeof string handling array
    * which normally returns typeof 'object'
    */
   function typeStr (obj) {
     return isArray(obj) ? 'array' : typeof obj;
   }
 
   function escapeRegExp (string) {
     return string.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, '\\$&');
   }
 
   /**
    * Null safe way of checking whether or not an object,
    * including its prototype, has a given property
    */
   function hasProperty (obj, propName) {
     return obj != null && typeof obj === 'object' && (propName in obj);
   }
 
   /**
    * Safe way of detecting whether or not the given thing is a primitive and
    * whether it has the given property
    */
   function primitiveHasOwnProperty (primitive, propName) {
     return (
       primitive != null
       && typeof primitive !== 'object'
       && primitive.hasOwnProperty
       && primitive.hasOwnProperty(propName)
     );
   }
 
   // Workaround for https://issues.apache.org/jira/browse/COUCHDB-577
   // See https://github.com/janl/mustache.js/issues/189
   var regExpTest = RegExp.prototype.test;
   function testRegExp (re, string) {
     return regExpTest.call(re, string);
   }
 
   var nonSpaceRe = /\S/;
   function isWhitespace (string) {
     return !testRegExp(nonSpaceRe, string);
   }
 
   var entityMap = {
     '&': '&',
     '<': '&lt;',
     '>': '&gt;',
     '"': '&quot;',
     "'": '&#39;',
     '/': '&#x2F;',
     '`': '&#x60;',
     '=': '&#x3D;'
   };
 
   function escapeHtml (string) {
     return String(string).replace(/[&<>"'`=\/]/g, function fromEntityMap (s) {
       return entityMap[s];
     });
   }
 
   var whiteRe = /\s*/;
   var spaceRe = /\s+/;
   var equalsRe = /\s*=/;
   var curlyRe = /\s*\}/;
   var tagRe = /#|\^|\/|>|\{|&|=|!/;
 
   /**
    * Breaks up the given `template` string into a tree of tokens. If the `tags`
    * argument is given here it must be an array with two string values: the
    * opening and closing tags used in the template (e.g. [ "<%", "%>" ]). Of
    * course, the default is to use mustaches (i.e. mustache.tags).
    *
    * A token is an array with at least 4 elements. The first element is the
    * mustache symbol that was used inside the tag, e.g. "#" or "&". If the tag
    * did not contain a symbol (i.e. {{myValue}}) this element is "name". For
    * all text that appears outside a symbol this element is "text".
    *
    * The second element of a token is its "value". For mustache tags this is
    * whatever else was inside the tag besides the opening symbol. For text tokens
    * this is the text itself.
    *
    * The third and fourth elements of the token are the start and end indices,
    * respectively, of the token in the original template.
    *
    * Tokens that are the root node of a subtree contain two more elements: 1) an
    * array of tokens in the subtree and 2) the index in the original template at
    * which the closing tag for that section begins.
    */
   function parseTemplate (template, tags) {
     if (!template)
       return [];
 
     var sections = [];     // Stack to hold section tokens
     var tokens = [];       // Buffer to hold the tokens
     var spaces = [];       // Indices of whitespace tokens on the current line
     var hasTag = false;    // Is there a {{tag}} on the current line?
     var nonSpace = false;  // Is there a non-space char on the current line?
 
     // Strips all whitespace tokens array for the current line
     // if there was a {{#tag}} on it and otherwise only space.
     function stripSpace () {
       if (hasTag && !nonSpace) {
         while (spaces.length)
           delete tokens[spaces.pop()];
       } else {
         spaces = [];
       }
 
       hasTag = false;
       nonSpace = false;
     }
 
     var openingTagRe, closingTagRe, closingCurlyRe;
     function compileTags (tagsToCompile) {
       if (typeof tagsToCompile === 'string')
         tagsToCompile = tagsToCompile.split(spaceRe, 2);
 
       if (!isArray(tagsToCompile) || tagsToCompile.length !== 2)
         throw new Error('Invalid tags: ' + tagsToCompile);
 
       openingTagRe = new RegExp(escapeRegExp(tagsToCompile[0]) + '\\s*');
       closingTagRe = new RegExp('\\s*' + escapeRegExp(tagsToCompile[1]));
       closingCurlyRe = new RegExp('\\s*' + escapeRegExp('}' + tagsToCompile[1]));
     }
 
     compileTags(tags || mustache.tags);
 
     var scanner = new Scanner(template);
 
     var start, type, value, chr, token, openSection;
     while (!scanner.eos()) {
       start = scanner.pos;
 
       // Match any text between tags.
       value = scanner.scanUntil(openingTagRe);
 
       if (value) {
         for (var i = 0, valueLength = value.length; i < valueLength; ++i) {
           chr = value.charAt(i);
 
           if (isWhitespace(chr)) {
             spaces.push(tokens.length);
           } else {
             nonSpace = true;
           }
 
           tokens.push([ 'text', chr, start, start + 1 ]);
           start += 1;
 
           // Check for whitespace on the current line.
           if (chr === '\n')
             stripSpace();
         }
       }
 
       // Match the opening tag.
       if (!scanner.scan(openingTagRe))
         break;
 
       hasTag = true;
 
       // Get the tag type.
       type = scanner.scan(tagRe) || 'name';
       scanner.scan(whiteRe);
 
       // Get the tag value.
       if (type === '=') {
         value = scanner.scanUntil(equalsRe);
         scanner.scan(equalsRe);
         scanner.scanUntil(closingTagRe);
       } else if (type === '{') {
         value = scanner.scanUntil(closingCurlyRe);
         scanner.scan(curlyRe);
         scanner.scanUntil(closingTagRe);
         type = '&';
       } else {
         value = scanner.scanUntil(closingTagRe);
       }
 
       // Match the closing tag.
       if (!scanner.scan(closingTagRe))
         throw new Error('Unclosed tag at ' + scanner.pos);
 
       token = [ type, value, start, scanner.pos ];
       tokens.push(token);
 
       if (type === '#' || type === '^') {
         sections.push(token);
       } else if (type === '/') {
         // Check section nesting.
         openSection = sections.pop();
 
         if (!openSection)
           throw new Error('Unopened section "' + value + '" at ' + start);
 
         if (openSection[1] !== value)
           throw new Error('Unclosed section "' + openSection[1] + '" at ' + start);
       } else if (type === 'name' || type === '{' || type === '&') {
         nonSpace = true;
       } else if (type === '=') {
         // Set the tags for the next time around.
         compileTags(value);
       }
     }
 
     // Make sure there are no open sections when we're done.
     openSection = sections.pop();
 
     if (openSection)
       throw new Error('Unclosed section "' + openSection[1] + '" at ' + scanner.pos);
 
     return nestTokens(squashTokens(tokens));
   }
 
   /**
    * Combines the values of consecutive text tokens in the given `tokens` array
    * to a single token.
    */
   function squashTokens (tokens) {
     var squashedTokens = [];
 
     var token, lastToken;
     for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
       token = tokens[i];
 
       if (token) {
         if (token[0] === 'text' && lastToken && lastToken[0] === 'text') {
           lastToken[1] += token[1];
           lastToken[3] = token[3];
         } else {
           squashedTokens.push(token);
           lastToken = token;
         }
       }
     }
 
     return squashedTokens;
   }
 
   /**
    * Forms the given array of `tokens` into a nested tree structure where
    * tokens that represent a section have two additional items: 1) an array of
    * all tokens that appear in that section and 2) the index in the original
    * template that represents the end of that section.
    */
   function nestTokens (tokens) {
     var nestedTokens = [];
     var collector = nestedTokens;
     var sections = [];
 
     var token, section;
     for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
       token = tokens[i];
 
       switch (token[0]) {
         case '#':
         case '^':
           collector.push(token);
           sections.push(token);
           collector = token[4] = [];
           break;
         case '/':
           section = sections.pop();
           section[5] = token[2];
           collector = sections.length > 0 ? sections[sections.length - 1][4] : nestedTokens;
           break;
         default:
           collector.push(token);
       }
     }
 
     return nestedTokens;
   }
 
   /**
    * A simple string scanner that is used by the template parser to find
    * tokens in template strings.
    */
   function Scanner (string) {
     this.string = string;
     this.tail = string;
     this.pos = 0;
   }
 
   /**
    * Returns `true` if the tail is empty (end of string).
    */
   Scanner.prototype.eos = function eos () {
     return this.tail === '';
   };
 
   /**
    * Tries to match the given regular expression at the current position.
    * Returns the matched text if it can match, the empty string otherwise.
    */
   Scanner.prototype.scan = function scan (re) {
     var match = this.tail.match(re);
 
     if (!match || match.index !== 0)
       return '';
 
     var string = match[0];
 
     this.tail = this.tail.substring(string.length);
     this.pos += string.length;
 
     return string;
   };
 
   /**
    * Skips all text until the given regular expression can be matched. Returns
    * the skipped string, which is the entire tail if no match can be made.
    */
   Scanner.prototype.scanUntil = function scanUntil (re) {
     var index = this.tail.search(re), match;
 
     switch (index) {
       case -1:
         match = this.tail;
         this.tail = '';
         break;
       case 0:
         match = '';
         break;
       default:
         match = this.tail.substring(0, index);
         this.tail = this.tail.substring(index);
     }
 
     this.pos += match.length;
 
     return match;
   };
 
   /**
    * Represents a rendering context by wrapping a view object and
    * maintaining a reference to the parent context.
    */
   function Context (view, parentContext) {
     this.view = view;
     this.cache = { '.': this.view };
     this.parent = parentContext;
   }
 
   /**
    * Creates a new context using the given view with this context
    * as the parent.
    */
   Context.prototype.push = function push (view) {
     return new Context(view, this);
   };
 
   /**
    * Returns the value of the given name in this context, traversing
    * up the context hierarchy if the value is absent in this context's view.
    */
   Context.prototype.lookup = function lookup (name) {
     var cache = this.cache;
 
     var value;
     if (cache.hasOwnProperty(name)) {
       value = cache[name];
     } else {
       var context = this, intermediateValue, names, index, lookupHit = false;
 
       while (context) {
         if (name.indexOf('.') > 0) {
           intermediateValue = context.view;
           names = name.split('.');
           index = 0;
 
           /**
            * Using the dot notion path in `name`, we descend through the
            * nested objects.
            *
            * To be certain that the lookup has been successful, we have to
            * check if the last object in the path actually has the property
            * we are looking for. We store the result in `lookupHit`.
            *
            * This is specially necessary for when the value has been set to
            * `undefined` and we want to avoid looking up parent contexts.
            *
            * In the case where dot notation is used, we consider the lookup
            * to be successful even if the last "object" in the path is
            * not actually an object but a primitive (e.g., a string, or an
            * integer), because it is sometimes useful to access a property
            * of an autoboxed primitive, such as the length of a string.
            **/
           while (intermediateValue != null && index < names.length) {
             if (index === names.length - 1)
               lookupHit = (
                 hasProperty(intermediateValue, names[index])
                 || primitiveHasOwnProperty(intermediateValue, names[index])
               );
 
             intermediateValue = intermediateValue[names[index++]];
           }
         } else {
           intermediateValue = context.view[name];
 
           /**
            * Only checking against `hasProperty`, which always returns `false` if
            * `context.view` is not an object. Deliberately omitting the check
            * against `primitiveHasOwnProperty` if dot notation is not used.
            *
            * Consider this example:
            * ```
            * Mustache.render("The length of a football field is {{#length}}{{length}}{{/length}}.", {length: "100 yards"})
            * ```
            *
            * If we were to check also against `primitiveHasOwnProperty`, as we do
            * in the dot notation case, then render call would return:
            *
            * "The length of a football field is 9."
            *
            * rather than the expected:
            *
            * "The length of a football field is 100 yards."
            **/
           lookupHit = hasProperty(context.view, name);
         }
 
         if (lookupHit) {
           value = intermediateValue;
           break;
         }
 
         context = context.parent;
       }
 
       cache[name] = value;
     }
 
     if (isFunction(value))
       value = value.call(this.view);
 
     return value;
   };
 
   /**
    * A Writer knows how to take a stream of tokens and render them to a
    * string, given a context. It also maintains a cache of templates to
    * avoid the need to parse the same template twice.
    */
   function Writer () {
     this.cache = {};
   }
 
   /**
    * Clears all cached templates in this writer.
    */
   Writer.prototype.clearCache = function clearCache () {
     this.cache = {};
   };
 
   /**
    * Parses and caches the given `template` according to the given `tags` or
    * `mustache.tags` if `tags` is omitted,  and returns the array of tokens
    * that is generated from the parse.
    */
   Writer.prototype.parse = function parse (template, tags) {
     var cache = this.cache;
     var cacheKey = template + ':' + (tags || mustache.tags).join(':');
     var tokens = cache[cacheKey];
 
     if (tokens == null)
       tokens = cache[cacheKey] = parseTemplate(template, tags);
 
     return tokens;
   };
 
   /**
    * High-level method that is used to render the given `template` with
    * the given `view`.
    *
    * The optional `partials` argument may be an object that contains the
    * names and templates of partials that are used in the template. It may
    * also be a function that is used to load partial templates on the fly
    * that takes a single argument: the name of the partial.
    *
    * If the optional `tags` argument is given here it must be an array with two
    * string values: the opening and closing tags used in the template (e.g.
    * [ "<%", "%>" ]). The default is to mustache.tags.
    */
   Writer.prototype.render = function render (template, view, partials, tags) {
     var tokens = this.parse(template, tags);
     var context = (view instanceof Context) ? view : new Context(view);
     return this.renderTokens(tokens, context, partials, template, tags);
   };
 
   /**
    * Low-level method that renders the given array of `tokens` using
    * the given `context` and `partials`.
    *
    * Note: The `originalTemplate` is only ever used to extract the portion
    * of the original template that was contained in a higher-order section.
    * If the template doesn't use higher-order sections, this argument may
    * be omitted.
    */
   Writer.prototype.renderTokens = function renderTokens (tokens, context, partials, originalTemplate, tags) {
     var buffer = '';
 
     var token, symbol, value;
     for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
       value = undefined;
       token = tokens[i];
       symbol = token[0];
 
       if (symbol === '#') value = this.renderSection(token, context, partials, originalTemplate);
       else if (symbol === '^') value = this.renderInverted(token, context, partials, originalTemplate);
       else if (symbol === '>') value = this.renderPartial(token, context, partials, tags);
       else if (symbol === '&') value = this.unescapedValue(token, context);
       else if (symbol === 'name') value = this.escapedValue(token, context);
       else if (symbol === 'text') value = this.rawValue(token);
 
       if (value !== undefined)
         buffer += value;
     }
 
     return buffer;
   };
 
   Writer.prototype.renderSection = function renderSection (token, context, partials, originalTemplate) {
     var self = this;
     var buffer = '';
     var value = context.lookup(token[1]);
 
     // This function is used to render an arbitrary template
     // in the current context by higher-order sections.
     function subRender (template) {
       return self.render(template, context, partials);
     }
 
     if (!value) return;
 
     if (isArray(value)) {
       for (var j = 0, valueLength = value.length; j < valueLength; ++j) {
         buffer += this.renderTokens(token[4], context.push(value[j]), partials, originalTemplate);
       }
     } else if (typeof value === 'object' || typeof value === 'string' || typeof value === 'number') {
       buffer += this.renderTokens(token[4], context.push(value), partials, originalTemplate);
     } else if (isFunction(value)) {
       if (typeof originalTemplate !== 'string')
         throw new Error('Cannot use higher-order sections without the original template');
 
       // Extract the portion of the original template that the section contains.
       value = value.call(context.view, originalTemplate.slice(token[3], token[5]), subRender);
 
       if (value != null)
         buffer += value;
     } else {
       buffer += this.renderTokens(token[4], context, partials, originalTemplate);
     }
     return buffer;
   };
 
   Writer.prototype.renderInverted = function renderInverted (token, context, partials, originalTemplate) {
     var value = context.lookup(token[1]);
 
     // Use JavaScript's definition of falsy. Include empty arrays.
     // See https://github.com/janl/mustache.js/issues/186
     if (!value || (isArray(value) && value.length === 0))
       return this.renderTokens(token[4], context, partials, originalTemplate);
   };
 
   Writer.prototype.renderPartial = function renderPartial (token, context, partials, tags) {
     if (!partials) return;
 
     var value = isFunction(partials) ? partials(token[1]) : partials[token[1]];
     if (value != null)
       return this.renderTokens(this.parse(value, tags), context, partials, value);
   };
 
   Writer.prototype.unescapedValue = function unescapedValue (token, context) {
     var value = context.lookup(token[1]);
     if (value != null)
       return value;
   };
 
   Writer.prototype.escapedValue = function escapedValue (token, context) {
     var value = context.lookup(token[1]);
     if (value != null)
       return mustache.escape(value);
   };
 
   Writer.prototype.rawValue = function rawValue (token) {
     return token[1];
   };
 
   mustache.name = 'mustache.js';
   mustache.version = '3.0.1';
   mustache.tags = [ '{{', '}}' ];
 
   // All high-level mustache.* functions use this writer.
   var defaultWriter = new Writer();
 
   /**
    * Clears all cached templates in the default writer.
    */
   mustache.clearCache = function clearCache () {
     return defaultWriter.clearCache();
   };
 
   /**
    * Parses and caches the given template in the default writer and returns the
    * array of tokens it contains. Doing this ahead of time avoids the need to
    * parse templates on the fly as they are rendered.
    */
   mustache.parse = function parse (template, tags) {
     return defaultWriter.parse(template, tags);
   };
 
   /**
    * Renders the `template` with the given `view` and `partials` using the
    * default writer. If the optional `tags` argument is given here it must be an
    * array with two string values: the opening and closing tags used in the
    * template (e.g. [ "<%", "%>" ]). The default is to mustache.tags.
    */
   mustache.render = function render (template, view, partials, tags) {
     if (typeof template !== 'string') {
       throw new TypeError('Invalid template! Template should be a "string" ' +
                           'but "' + typeStr(template) + '" was given as the first ' +
                           'argument for mustache#render(template, view, partials)');
     }
 
     return defaultWriter.render(template, view, partials, tags);
   };
 
   // This is here for backwards compatibility with 0.4.x.,
   /*eslint-disable */ // eslint wants camel cased function name
   mustache.to_html = function to_html (template, view, partials, send) {
     /*eslint-enable*/
 
     var result = mustache.render(template, view, partials);
 
     if (isFunction(send)) {
       send(result);
     } else {
       return result;
     }
   };
 
   // Export the escaping function so that the user may override it.
   // See https://github.com/janl/mustache.js/issues/244
   mustache.escape = escapeHtml;
 
   // Export these mainly for testing, but also for advanced usage.
   mustache.Scanner = Scanner;
   mustache.Context = Context;
   mustache.Writer = Writer;
 
   return mustache;
 }));

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