1 | /*
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2 | * Copyright (c) 2018 One Hill Technologies, LLC
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | */
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16 |
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17 | const { plural } = require('pluralize');
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18 | const { get, isArray, isString } = require ('lodash');
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19 |
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20 | module.exports = function (resources, component) {
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21 | let type, name;
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22 |
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23 | if (isString (component)) {
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24 | // The component name is a string. This means we need to split the string
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25 | // such that the part before the colon is the type, and the part after the
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26 | // colon is the name.
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27 | [type, name] = component.split (':');
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28 | }
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29 | else if (isArray (component)) {
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30 | // The component name is an array. This means the first item is the type,
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31 | // and remaining values are the name of the resource.
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32 | [type, ...name] = component;
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33 | }
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34 | else {
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35 | throw new Error ('The component must be a String or an Array');
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36 | }
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37 |
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38 | const types = plural (type);
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39 | const entities = resources[types];
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40 |
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41 | if (!entities)
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42 | throw new Error (`${type} is not a valid type.`);
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43 |
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44 | let entity = get (entities, name);
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45 |
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46 | if (!entity)
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47 | throw new Error (`${component} does not exist.`);
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48 |
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49 | return entity;
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50 | };
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51 |
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