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milestone-grouping-strategy.service.ts
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milestone-grouping-strategy.service.ts
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import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { map } from 'rxjs/operators';
import { Issue } from '../../models/issue.model';
import { Milestone } from '../../models/milestone.model';
import { MilestoneService } from '../milestone.service';
import { GroupingStrategy } from './grouping-strategy.interface';
/**
* A GroupingStrategy that groups issues/prs based on their milestones.
*/
@Injectable({
providedIn: 'root'
})
export class MilestoneGroupingStrategy implements GroupingStrategy {
constructor(private milestoneService: MilestoneService) {}
/**
* Retrieves data for a milestone.
*/
getDataForGroup(issues: Issue[], key: Milestone): Issue[] {
return issues.filter((issue) => issue.milestone.equals(key));
}
/**
* Retrieves an Observable emitting milestones available for grouping issues.
*/
getGroups(): Observable<Milestone[]> {
return this.milestoneService.fetchMilestones().pipe(
map((milestones) => {
const parseMilestone = this.milestoneService.parseMilestoneData(milestones);
parseMilestone.push(Milestone.IssueWithoutMilestone);
parseMilestone.push(Milestone.PRWithoutMilestone);
return parseMilestone;
})
);
}
/**
* Groups other than Default Milestone need to be shown on the
* hidden group list if empty.
*/
isInHiddenList(group: Milestone): boolean {
return group !== Milestone.IssueWithoutMilestone && group !== Milestone.PRWithoutMilestone;
}
}