1 | import { __assign, __spreadArray } from "tslib";
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2 | import { isNonNullObject } from "./objects.js";
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3 | var hasOwnProperty = Object.prototype.hasOwnProperty;
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4 | export function mergeDeep() {
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5 | var sources = [];
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6 | for (var _i = 0; _i < arguments.length; _i++) {
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7 | sources[_i] = arguments[_i];
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8 | }
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9 | return mergeDeepArray(sources);
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10 | }
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11 | export function mergeDeepArray(sources) {
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12 | var target = sources[0] || {};
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13 | var count = sources.length;
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14 | if (count > 1) {
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15 | var merger = new DeepMerger();
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16 | for (var i = 1; i < count; ++i) {
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17 | target = merger.merge(target, sources[i]);
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18 | }
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19 | }
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20 | return target;
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21 | }
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22 | var defaultReconciler = function (target, source, property) {
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23 | return this.merge(target[property], source[property]);
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24 | };
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25 | var DeepMerger = (function () {
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26 | function DeepMerger(reconciler) {
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27 | if (reconciler === void 0) { reconciler = defaultReconciler; }
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28 | this.reconciler = reconciler;
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29 | this.isObject = isNonNullObject;
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30 | this.pastCopies = new Set();
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31 | }
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32 | DeepMerger.prototype.merge = function (target, source) {
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33 | var _this = this;
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34 | var context = [];
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35 | for (var _i = 2; _i < arguments.length; _i++) {
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36 | context[_i - 2] = arguments[_i];
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37 | }
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38 | if (isNonNullObject(source) && isNonNullObject(target)) {
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39 | Object.keys(source).forEach(function (sourceKey) {
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40 | if (hasOwnProperty.call(target, sourceKey)) {
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41 | var targetValue = target[sourceKey];
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42 | if (source[sourceKey] !== targetValue) {
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43 | var result = _this.reconciler.apply(_this, __spreadArray([target, source, sourceKey], context, false));
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44 | if (result !== targetValue) {
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45 | target = _this.shallowCopyForMerge(target);
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46 | target[sourceKey] = result;
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47 | }
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48 | }
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49 | }
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50 | else {
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51 | target = _this.shallowCopyForMerge(target);
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52 | target[sourceKey] = source[sourceKey];
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53 | }
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54 | });
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55 | return target;
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56 | }
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57 | return source;
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58 | };
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59 | DeepMerger.prototype.shallowCopyForMerge = function (value) {
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60 | if (isNonNullObject(value)) {
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61 | if (!this.pastCopies.has(value)) {
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62 | if (Array.isArray(value)) {
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63 | value = value.slice(0);
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64 | }
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65 | else {
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66 | value = __assign({ __proto__: Object.getPrototypeOf(value) }, value);
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67 | }
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68 | this.pastCopies.add(value);
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69 | }
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70 | }
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71 | return value;
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72 | };
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73 | return DeepMerger;
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74 | }());
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75 | export { DeepMerger };
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76 |
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