68 lines
2.1 KiB
TypeScript
68 lines
2.1 KiB
TypeScript
///
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/// Copyright © 2016-2024 The Thingsboard Authors
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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import {
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inject,
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KeyValueChangeRecord,
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KeyValueChanges,
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KeyValueDiffer,
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KeyValueDiffers,
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Pipe,
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PipeTransform
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} from '@angular/core';
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import { KeyValue } from '@angular/common';
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import { isDefinedAndNotNull } from '@core/utils';
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@Pipe({
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name: 'keyValueIsNotEmpty',
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pure: false,
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standalone: true,
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})
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export class KeyValueIsNotEmptyPipe implements PipeTransform {
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private differs: KeyValueDiffers = inject(KeyValueDiffers);
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private differ!: KeyValueDiffer<string, unknown>;
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private keyValues: Array<KeyValue<string, unknown>> = [];
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// This is a custom implementation of angular keyvalue pipe
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// https://github.com/angular/angular/blob/main/packages/common/src/pipes/keyvalue_pipe.ts
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transform(
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input: Record<string, unknown>,
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): Array<KeyValue<string, unknown>> {
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if (!input || (!(input instanceof Map) && typeof input !== 'object')) {
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return null;
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}
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this.differ ??= this.differs.find(input).create();
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const differChanges: KeyValueChanges<string, unknown> | null = this.differ.diff(input);
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if (differChanges) {
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this.keyValues = [];
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differChanges.forEachItem((r: KeyValueChangeRecord<string, unknown>) => {
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if (isDefinedAndNotNull(r.currentValue)) {
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this.keyValues.push(this.makeKeyValuePair(r.key, r.currentValue!));
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}
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});
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}
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return this.keyValues;
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}
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private makeKeyValuePair(key: string, value: unknown): KeyValue<string, unknown> {
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return {key, value};
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}
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}
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