73 lines
1.9 KiB
TypeScript
73 lines
1.9 KiB
TypeScript
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import { Injectable } from '@angular/core';
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/**
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* Helper service to convert numbers to time representation
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* and vice versa
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*
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* @example
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* ```ts
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* // will result in 70
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* const a = this.durationService.stringToDuration('01:10h');
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*
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* // will also result in 70
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* const b = this.durationService.stringToDuration('01:10');
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*
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* // will result in 0
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* const c = this.durationService.stringToDuration('01:10b');
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* ```
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*
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* @example
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* ```ts
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* // will result in 01:10 h
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* const a = this.durationService.durationToString(70);
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* ```
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*/
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@Injectable({
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providedIn: 'root'
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})
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export class DurationService {
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/**
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* Constructor
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*/
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public constructor() {}
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/**
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* Transform a duration string to duration in minutes.
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*
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* @param durationText the text to be transformed into a duration
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* @returns time in minutes or 0 if values are below 0 or no parsable numbers
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*/
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public stringToDuration(durationText: string): number {
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const splitDuration = durationText.replace('h', '').split(':');
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let time: number;
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if (splitDuration.length > 1 && !isNaN(+splitDuration[0]) && !isNaN(+splitDuration[1])) {
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time = +splitDuration[0] * 60 + +splitDuration[1];
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} else if (splitDuration.length === 1 && !isNaN(+splitDuration[0])) {
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time = +splitDuration[0];
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}
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if (!time || time < 0) {
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time = 0;
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}
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return time;
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}
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/**
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* Converts a duration number (given in minutes)
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* To a string in HH:MM format
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*
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* @param duration value in minutes
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* @returns a more human readable time representation
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*/
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public durationToString(duration: number): string {
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const hours = Math.floor(duration / 60);
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const minutes = `0${Math.floor(duration - hours * 60)}`.slice(-2);
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if (!isNaN(+hours) && !isNaN(+minutes)) {
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return `${hours}:${minutes} h`;
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} else {
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return '';
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}
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}
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}
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