handlebars/dist/amd/handlebars/helpers/each.js

Handlebars provides the power necessary to let you build semantic templates effectively with no frustration

define(['exports', 'module', '../utils', '../exception'], function (exports, module, _utils, _exception) {
  'use strict';

  // istanbul ignore next

  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }

  var _Exception = _interopRequireDefault(_exception);

  /**
   * Close an unfinished iterator after the block body threw, like for...of does,
   * so that generators can run their cleanup code.
   *
   * Errors thrown while closing, including by a `return` getter, are ignored:
   * the block's error is the cause and is the one the caller must see.
   *
   * @param {Iterator} iterator the iterator that was being consumed
   */
  function closeIterator(iterator) {
    try {
      var _close = iterator['return'];
      if (_utils.isFunction(_close)) {
        _close.call(iterator);
      }
    } catch (closeError) {
      // NOP
    }
  }

  module.exports = function (instance) {
    instance.registerHelper('each', function (context, options) {
      if (!options) {
        throw new _Exception['default']('Must pass iterator to #each');
      }

      var fn = options.fn,
          inverse = options.inverse,
          i = 0,
          ret = '',
          data = undefined,
          contextPath = undefined;

      if (options.data && options.ids) {
        contextPath = _utils.appendContextPath(options.data.contextPath, options.ids[0]) + '.';
      }

      if (_utils.isFunction(context)) {
        context = context.call(this);
      }

      if (options.data) {
        data = _utils.createFrame(options.data);
      }

      function execIteration(field, index, last, value) {
        if (data) {
          data.key = field;
          data.index = index;
          data.first = index === 0;
          data.last = !!last;

          if (contextPath) {
            data.contextPath = contextPath + field;
          }
        }

        ret = ret + fn(value, {
          data: data,
          blockParams: _utils.blockParams([value, field], [contextPath + field, null])
        });
      }

      if (context && typeof context === 'object') {
        if (_utils.isArray(context)) {
          for (var j = context.length; i < j; i++) {
            if (i in context) {
              execIteration(i, i, i === context.length - 1, context[i]);
            }
          }
        } else if (typeof Symbol === 'function' && context[Symbol.iterator]) {
          var iterator = context[Symbol.iterator]();
          var current = iterator.next();
          while (!current.done) {
            var next = iterator.next();
            try {
              execIteration(i, i, next.done, current.value);
            } catch (e) {
              if (!next.done) {
                closeIterator(iterator);
              }
              throw e;
            }
            current = next;
            i++;
          }
        } else {
          (function () {
            var priorKey = undefined;

            Object.keys(context).forEach(function (key) {
              // We're running the iterations one step out of sync so we can detect
              // the last iteration without have to scan the object twice and create
              // an itermediate keys array.
              if (priorKey !== undefined) {
                execIteration(priorKey, i - 1, false, context[priorKey]);
              }
              priorKey = key;
              i++;
            });
            if (priorKey !== undefined) {
              execIteration(priorKey, i - 1, true, context[priorKey]);
            }
          })();
        }
      }

      if (i === 0) {
        ret = inverse(this);
      }

      return ret;
    });
  };
});
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"sources":["../../../../lib/handlebars/helpers/each.js"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;AAkBA,WAAS,aAAa,CAAC,QAAQ,EAAE;AAC/B,QAAI;AACF,UAAI,MAAK,GAAG,QAAQ,UAAO,CAAC;AAC5B,UAAI,OAhBN,UAAU,CAgBO,MAAK,CAAC,EAAE;AACrB,cAAK,CAAC,IAAI,CAAC,QAAQ,CAAC,CAAC;OACtB;KACF,CAAC,OAAO,UAAU,EAAE;;KAEpB;GACF;;mBAEc,UAAS,QAAQ,EAAE;AAChC,YAAQ,CAAC,cAAc,CAAC,MAAM,EAAE,UAAS,OAAO,EAAE,OAAO,EAAE;AACzD,UAAI,CAAC,OAAO,EAAE;AACZ,cAAM,0BAAc,6BAA6B,CAAC,CAAC;OACpD;;AAED,UAAI,EAAE,GAAG,OAAO,CAAC,EAAE;UACjB,OAAO,GAAG,OAAO,CAAC,OAAO;UACzB,CAAC,GAAG,CAAC;UACL,GAAG,GAAG,EAAE;UACR,IAAI,YAAA;UACJ,WAAW,YAAA,CAAC;;AAEd,UAAI,OAAO,CAAC,IAAI,IAAI,OAAO,CAAC,GAAG,EAAE;AAC/B,mBAAW,GACT,OA3CN,iBAAiB,CA2CO,OAAO,CAAC,IAAI,CAAC,WAAW,EAAE,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC,GAAG,GAAG,CAAC;OACrE;;AAED,UAAI,OA1CN,UAAU,CA0CO,OAAO,CAAC,EAAE;AACvB,eAAO,GAAG,OAAO,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC;OAC9B;;AAED,UAAI,OAAO,CAAC,IAAI,EAAE;AAChB,YAAI,GAAG,OAjDX,WAAW,CAiDY,OAAO,CAAC,IAAI,CAAC,CAAC;OAClC;;AAED,eAAS,aAAa,CAAC,KAAK,EAAE,KAAK,EAAE,IAAI,EAAE,KAAK,EAAE;AAChD,YAAI,IAAI,EAAE;AACR,cAAI,CAAC,GAAG,GAAG,KAAK,CAAC;AACjB,cAAI,CAAC,KAAK,GAAG,KAAK,CAAC;AACnB,cAAI,CAAC,KAAK,GAAG,KAAK,KAAK,CAAC,CAAC;AACzB,cAAI,CAAC,IAAI,GAAG,CAAC,CAAC,IAAI,CAAC;;AAEnB,cAAI,WAAW,EAAE;AACf,gBAAI,CAAC,WAAW,GAAG,WAAW,GAAG,KAAK,CAAC;WACxC;SACF;;AAED,WAAG,GACD,GAAG,GACH,EAAE,CAAC,KAAK,EAAE;AACR,cAAI,EAAE,IAAI;AACV,qBAAW,EAAE,OArErB,WAAW,CAqEsB,CAAC,KAAK,EAAE,KAAK,CAAC,EAAE,CAAC,WAAW,GAAG,KAAK,EAAE,IAAI,CAAC,CAAC;SACtE,CAAC,CAAC;OACN;;AAED,UAAI,OAAO,IAAI,OAAO,OAAO,KAAK,QAAQ,EAAE;AAC1C,YAAI,OAxER,OAAO,CAwES,OAAO,CAAC,EAAE;AACpB,eAAK,IAAI,CAAC,GAAG,OAAO,CAAC,MAAM,EAAE,CAAC,GAAG,CAAC,EAAE,CAAC,EAAE,EAAE;AACvC,gBAAI,CAAC,IAAI,OAAO,EAAE;AAChB,2BAAa,CAAC,CAAC,EAAE,CAAC,EAAE,CAAC,KAAK,OAAO,CAAC,MAAM,GAAG,CAAC,EAAE,OAAO,CAAC,CAAC,CAAC,CAAC,CAAC;aAC3D;WACF;SACF,MAAM,IAAI,OAAO,MAAM,KAAK,UAAU,IAAI,OAAO,CAAC,MAAM,CAAC,QAAQ,CAAC,EAAE;AACnE,cAAM,QAAQ,GAAG,OAAO,CAAC,MAAM,CAAC,QAAQ,CAAC,EAAE,CAAC;AAC5C,cAAI,OAAO,GAAG,QAAQ,CAAC,IAAI,EAAE,CAAC;AAC9B,iBAAO,CAAC,OAAO,CAAC,IAAI,EAAE;AACpB,gBAAI,IAAI,GAAG,QAAQ,CAAC,IAAI,EAAE,CAAC;AAC3B,gBAAI;AACF,2BAAa,CAAC,CAAC,EAAE,CAAC,EAAE,IAAI,CAAC,IAAI,EAAE,OAAO,CAAC,KAAK,CAAC,CAAC;aAC/C,CAAC,OAAO,CAAC,EAAE;AACV,kBAAI,CAAC,IAAI,CAAC,IAAI,EAAE;AACd,6BAAa,CAAC,QAAQ,CAAC,CAAC;eACzB;AACD,oBAAM,CAAC,CAAC;aACT;AACD,mBAAO,GAAG,IAAI,CAAC;AACf,aAAC,EAAE,CAAC;WACL;SACF,MAAM;;AACL,gBAAI,QAAQ,YAAA,CAAC;;AAEb,kBAAM,CAAC,IAAI,CAAC,OAAO,CAAC,CAAC,OAAO,CAAC,UAAA,GAAG,EAAI;;;;AAIlC,kBAAI,QAAQ,KAAK,SAAS,EAAE;AAC1B,6BAAa,CAAC,QAAQ,EAAE,CAAC,GAAG,CAAC,EAAE,KAAK,EAAE,OAAO,CAAC,QAAQ,CAAC,CAAC,CAAC;eAC1D;AACD,sBAAQ,GAAG,GAAG,CAAC;AACf,eAAC,EAAE,CAAC;aACL,CAAC,CAAC;AACH,gBAAI,QAAQ,KAAK,SAAS,EAAE;AAC1B,2BAAa,CAAC,QAAQ,EAAE,CAAC,GAAG,CAAC,EAAE,IAAI,EAAE,OAAO,CAAC,QAAQ,CAAC,CAAC,CAAC;aACzD;;SACF;OACF;;AAED,UAAI,CAAC,KAAK,CAAC,EAAE;AACX,WAAG,GAAG,OAAO,CAAC,IAAI,CAAC,CAAC;OACrB;;AAED,aAAO,GAAG,CAAC;KACZ,CAAC,CAAC;GACJ","file":"each.js","sourcesContent":["import {\n  appendContextPath,\n  blockParams,\n  createFrame,\n  isArray,\n  isFunction\n} from '../utils';\nimport Exception from '../exception';\n\n/**\n * Close an unfinished iterator after the block body threw, like for...of does,\n * so that generators can run their cleanup code.\n *\n * Errors thrown while closing, including by a `return` getter, are ignored:\n * the block's error is the cause and is the one the caller must see.\n *\n * @param {Iterator} iterator the iterator that was being consumed\n */\nfunction closeIterator(iterator) {\n  try {\n    let close = iterator.return;\n    if (isFunction(close)) {\n      close.call(iterator);\n    }\n  } catch (closeError) {\n    // NOP\n  }\n}\n\nexport default function(instance) {\n  instance.registerHelper('each', function(context, options) {\n    if (!options) {\n      throw new Exception('Must pass iterator to #each');\n    }\n\n    let fn = options.fn,\n      inverse = options.inverse,\n      i = 0,\n      ret = '',\n      data,\n      contextPath;\n\n    if (options.data && options.ids) {\n      contextPath =\n        appendContextPath(options.data.contextPath, options.ids[0]) + '.';\n    }\n\n    if (isFunction(context)) {\n      context = context.call(this);\n    }\n\n    if (options.data) {\n      data = createFrame(options.data);\n    }\n\n    function execIteration(field, index, last, value) {\n      if (data) {\n        data.key = field;\n        data.index = index;\n        data.first = index === 0;\n        data.last = !!last;\n\n        if (contextPath) {\n          data.contextPath = contextPath + field;\n        }\n      }\n\n      ret =\n        ret +\n        fn(value, {\n          data: data,\n          blockParams: blockParams([value, field], [contextPath + field, null])\n        });\n    }\n\n    if (context && typeof context === 'object') {\n      if (isArray(context)) {\n        for (let j = context.length; i < j; i++) {\n          if (i in context) {\n            execIteration(i, i, i === context.length - 1, context[i]);\n          }\n        }\n      } else if (typeof Symbol === 'function' && context[Symbol.iterator]) {\n        const iterator = context[Symbol.iterator]();\n        let current = iterator.next();\n        while (!current.done) {\n          let next = iterator.next();\n          try {\n            execIteration(i, i, next.done, current.value);\n          } catch (e) {\n            if (!next.done) {\n              closeIterator(iterator);\n            }\n            throw e;\n          }\n          current = next;\n          i++;\n        }\n      } else {\n        let priorKey;\n\n        Object.keys(context).forEach(key => {\n          // We're running the iterations one step out of sync so we can detect\n          // the last iteration without have to scan the object twice and create\n          // an itermediate keys array.\n          if (priorKey !== undefined) {\n            execIteration(priorKey, i - 1, false, context[priorKey]);\n          }\n          priorKey = key;\n          i++;\n        });\n        if (priorKey !== undefined) {\n          execIteration(priorKey, i - 1, true, context[priorKey]);\n        }\n      }\n    }\n\n    if (i === 0) {\n      ret = inverse(this);\n    }\n\n    return ret;\n  });\n}\n"]}