src.app.shared.pipes.sort-by-field.pipe.ts Maven / Gradle / Ivy
The newest version!
/*
* SPDX-FileCopyrightText: 2017-2024 Enedis
*
* SPDX-License-Identifier: Apache-2.0
*
*/
import { Pipe, PipeTransform } from '@angular/core';
/**
* Usage :
* For example an object Scenario with field title
* To order by title in desc order :
* *ngFor="let scenario of (scenarios | sortByField : 'title' : true)">
*/
@Pipe({ name: 'sortByField' })
export class SortByFieldPipe implements PipeTransform {
transform(array: any[], field: string, reverse: boolean): any[] {
if (field != null && field !== '') {
array.sort((a: any, b: any) => {
const fieldA = this.resolve(field, a);
const fieldB = this.resolve(field, b);
if (fieldA == null && fieldB == null) {
return 0;
} else if (fieldB == null) {
return reverse ? -1 : 1;
} else if (fieldA == null) {
return reverse ? 1 : -1;
}
if (fieldA < fieldB) {
return reverse ? 1 : -1;
} else if (fieldA > fieldB) {
return reverse ? -1 : 1;
} else {
return 0;
}
});
}
return array;
}
// Usage :
// resolve("style.width", document.body)
// resolve("part.0.size", someObject)
// returns null when intermediate properties are not defined
resolve(path, obj) {
return path.split('.').reduce(function (prev, curr) {
return prev ? prev[curr] : null;
}, obj || self);
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy