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• .. (вверх)
• [DIR] ..
• [FILE] block-helper-missing.js
• [FILE] each.js
• [FILE] helper-missing.js
• [FILE] if.js
• [FILE] log.js
• [FILE] lookup.js
• [FILE] with.js

Просмотр файла: each.js

'use strict';

exports.__esModule = true;
// istanbul ignore next

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

var _utils = require('../utils');

var _exception = require('../exception');

var _exception2 = _interopRequireDefault(_exception);

exports['default'] = function (instance) {
  instance.registerHelper('each', function (context, options) {
    if (!options) {
      throw new _exception2['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) {
      if (data) {
        data.key = field;
        data.index = index;
        data.first = index === 0;
        data.last = !!last;

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

      ret = ret + fn(context[field], {
        data: data,
        blockParams: _utils.blockParams([context[field], 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);
          }
        }
      } else if (typeof Symbol === 'function' && context[Symbol.iterator]) {
        var newContext = [];
        var iterator = context[Symbol.iterator]();
        for (var it = iterator.next(); !it.done; it = iterator.next()) {
          newContext.push(it.value);
        }
        context = newContext;
        for (var j = context.length; i < j; i++) {
          execIteration(i, i, i === context.length - 1);
        }
      } 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);
            }
            priorKey = key;
            i++;
          });
          if (priorKey !== undefined) {
            execIteration(priorKey, i - 1, true);
          }
        })();
      }
    }

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

    return ret;
  });
};

module.exports = exports['default'];
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