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import { Pipe, PipeTransform } from '@angular/core';
@Pipe({
name: 'duration',
pure: false
})
export class DurationPipe implements PipeTransform {
/**
* Translates seconds into human readable format of seconds, minutes, hours, days, and years
* source: https://stackoverflow.com/a/34270811
*
* @param {number} seconds The number of seconds to be processed
* @return {string} The phrase describing the the amount of time
*/
transform(seconds: number): string {
const levels = [
[`${Math.floor(seconds / 31536000)}`, 'years'],
[`${Math.floor((seconds % 31536000) / 86400)}`, 'days'],
[`${Math.floor((seconds % 86400) / 3600)}`, 'hours'],
[`${Math.floor((seconds % 3600) / 60)}`, 'minutes'],
[`${Math.floor(seconds % 60)}`, 'seconds']
];
let returntext = '';
for (let i = 0, max = levels.length; i < max; i++) {
if (levels[i][0] === '0') {
continue;
}
returntext +=
' ' +
levels[i][0] +
' ' +
(levels[i][0] === '1' ? levels[i][1].substr(0, levels[i][1].length - 1) : levels[i][1]);
}
return returntext.trim() || '1 second';
}
}
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