OpenSlides/client/src/app/shared/pipes/poll-percent-base.pipe.ts

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import { Pipe, PipeTransform } from '@angular/core';
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import { AssignmentPollService } from 'app/site/assignments/services/assignment-poll.service';
import { MotionPollService } from 'app/site/motions/services/motion-poll.service';
import { PollData } from 'app/site/polls/services/poll.service';
/**
* Uses a number and a ViewPoll-object.
* Converts the number to the voting percent base using the
* given 100%-Base option in the poll object
*
* returns null if a percent calculation is not possible
* or the result is 0
*
* @example
* ```html
* <span> {{ voteYes | pollPercentBase: poll }} </span>
* ```
*/
@Pipe({
name: 'pollPercentBase'
})
export class PollPercentBasePipe implements PipeTransform {
private decimalPlaces = 3;
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public constructor(
private assignmentPollService: AssignmentPollService,
private motionPollService: MotionPollService
) {}
public transform(value: number, poll: PollData): string | null {
let totalByBase: number;
if ((<any>poll).assignment) {
totalByBase = this.assignmentPollService.getPercentBase(poll);
} else {
totalByBase = this.motionPollService.getPercentBase(poll);
}
if (totalByBase) {
const percentNumber = (value / totalByBase) * 100;
if (percentNumber > 0) {
const result = percentNumber % 1 === 0 ? percentNumber : percentNumber.toFixed(this.decimalPlaces);
return `(${result} %)`;
}
}
return null;
}
}