sorting.pipe.ts

import { Pipe } from '@angular/core';
import { LatinisePipe } from 'ngx-pipes';
import { FunctionsService } from '@service/functions.service';

@Pipe({ name: 'sortBy' })
export class SortPipe {

    constructor(
        private latinisePipe: LatinisePipe,
        public functions: FunctionsService
    ) { }


    transform(array: Array<any>, args: string = ''): Array<any> {
        let normA = '';
        let normB = '';

        if (!this.functions.empty(array)) {
            array.sort((a: any, b: any) => {

                if (args === undefined) {
                    normA = this.latinisePipe.transform(a).toLocaleLowerCase();
                    normB = this.latinisePipe.transform(b).toLocaleLowerCase();
                } else {
                    a[args] = a[args] !== null ? a[args] : '';
                    b[args] = b[args] !== null ? b[args] : '';
                    normA = typeof a[args] !== 'number' ? this.latinisePipe.transform(a[args]).toLocaleLowerCase() : a[args];
                    normB = typeof b[args] !== 'number' ? this.latinisePipe.transform(b[args]).toLocaleLowerCase() : b[args];
                }
                if (normA < normB) {
                    return -1;
                } else if (normA > normB) {
                    return 1;
                } else {
                    return 0;
                }
            });
            return array;
        } else {
            return [];
        }
    }
}