1 |
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2 |
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3 |
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4 |
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5 | "use strict";
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6 |
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7 | const getProperty = (obj, name) => {
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8 | name = name.split(".");
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9 | for (let i = 0; i < name.length - 1; i++) {
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10 | obj = obj[name[i]];
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11 | if (typeof obj !== "object" || !obj || Array.isArray(obj)) return;
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12 | }
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13 | return obj[name.pop()];
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14 | };
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15 |
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16 | const setProperty = (obj, name, value) => {
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17 | name = name.split(".");
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18 | for (let i = 0; i < name.length - 1; i++) {
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19 | if (typeof obj[name[i]] !== "object" && obj[name[i]] !== undefined) return;
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20 | if (Array.isArray(obj[name[i]])) return;
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21 | if (!obj[name[i]]) obj[name[i]] = {};
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22 | obj = obj[name[i]];
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23 | }
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24 | obj[name.pop()] = value;
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25 | };
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26 |
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27 | class OptionsDefaulter {
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28 | constructor() {
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29 | this.defaults = {};
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30 | this.config = {};
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31 | }
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32 |
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33 | process(options) {
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34 | options = Object.assign({}, options);
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35 | for (let name in this.defaults) {
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36 | switch (this.config[name]) {
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37 | case undefined:
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38 | if (getProperty(options, name) === undefined) {
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39 | setProperty(options, name, this.defaults[name]);
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40 | }
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41 | break;
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42 | case "call":
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43 | setProperty(
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44 | options,
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45 | name,
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46 | this.defaults[name].call(this, getProperty(options, name), options)
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47 | );
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48 | break;
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49 | case "make":
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50 | if (getProperty(options, name) === undefined) {
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51 | setProperty(options, name, this.defaults[name].call(this, options));
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52 | }
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53 | break;
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54 | case "append": {
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55 | let oldValue = getProperty(options, name);
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56 | if (!Array.isArray(oldValue)) {
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57 | oldValue = [];
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58 | }
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59 | oldValue.push(...this.defaults[name]);
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60 | setProperty(options, name, oldValue);
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61 | break;
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62 | }
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63 | default:
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64 | throw new Error(
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65 | "OptionsDefaulter cannot process " + this.config[name]
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66 | );
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67 | }
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68 | }
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69 | return options;
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70 | }
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71 |
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72 | set(name, config, def) {
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73 | if (def !== undefined) {
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74 | this.defaults[name] = def;
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75 | this.config[name] = config;
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76 | } else {
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77 | this.defaults[name] = config;
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78 | delete this.config[name];
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79 | }
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80 | }
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81 | }
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82 |
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83 | module.exports = OptionsDefaulter;
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