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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
/**
* Created by rc2122 on 5/17/2017.
*/
import {Pipe, PipeTransform} from '@angular/core';
@Pipe({name: 'groupBy'})
export class GroupByPipe implements PipeTransform {
transform(value: Array<any>, field: string): Array<any> {
if(!value) {
return null;
}
const groupedObj = value.reduce((prev, cur)=> {
if(!prev[cur[field]]) {
prev[cur[field]] = [cur];
} else {
prev[cur[field]].push(cur);
}
return prev;
}, {});
return Object.keys(groupedObj).map((key:string) => {return { key, value: groupedObj[key] }; });
}
}
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