83 lines
3.1 KiB
JavaScript
83 lines
3.1 KiB
JavaScript
"use strict";
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// The MIT License (MIT)
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//
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// Copyright (c) 2022 Firebase
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Change = exports.applyFieldMask = void 0;
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/** @hidden */
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function applyFieldMask(sparseBefore, after, fieldMask) {
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const before = { ...after };
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const masks = fieldMask.split(',');
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for (const mask of masks) {
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const parts = mask.split('.');
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const head = parts[0];
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const tail = parts.slice(1).join('.');
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if (parts.length > 1) {
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before[head] = applyFieldMask(sparseBefore === null || sparseBefore === void 0 ? void 0 : sparseBefore[head], after[head], tail);
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continue;
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}
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const val = sparseBefore === null || sparseBefore === void 0 ? void 0 : sparseBefore[head];
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if (typeof val === 'undefined') {
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delete before[mask];
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}
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else {
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before[mask] = val;
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}
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}
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return before;
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}
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exports.applyFieldMask = applyFieldMask;
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/**
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* The Functions interface for events that change state, such as
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* Realtime Database or Cloud Firestore `onWrite` and `onUpdate`.
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*
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* For more information about the format used to construct `Change` objects, see
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* {@link ChangeJson} below.
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*
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*/
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class Change {
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constructor(before, after) {
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this.before = before;
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this.after = after;
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}
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/**
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* @hidden
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* Factory method for creating a Change from a `before` object and an `after`
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* object.
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*/
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static fromObjects(before, after) {
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return new Change(before, after);
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}
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/**
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* @hidden
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* Factory method for creating a Change from a JSON and an optional customizer
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* function to be applied to both the `before` and the `after` fields.
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*/
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static fromJSON(json, customizer = (x) => x) {
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let before = { ...json.before };
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if (json.fieldMask) {
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before = applyFieldMask(before, json.after, json.fieldMask);
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}
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return Change.fromObjects(customizer(before || {}), customizer(json.after || {}));
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}
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}
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exports.Change = Change;
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