import {Pipe, PipeTransform} from "@angular/core";

@Pipe({
    name: `sortByProperty`,
    pure: false // causes the pipe to continue to update as the data source is updated
})
export class SortByPropertyPipe {
    transform(list, [propertyName]) {
        return list.sort((a, b) => {
                let aValue = getNestedValue(a, propertyName);
                let bValue = getNestedValue(b, propertyName);

                if (aValue > bValue) return 1;
                if (aValue < bValue) return -1;
                return 0;
            }
        )
    }
}

function getNestedValue(obj, nestedKey) {
    return nestedKey.split('.').reduce((acc, curr)=> {
        return acc[curr];
    }, obj)
}