import { CommandHandler, ICommandHandler } from '@nestjs/cqrs';
import { CommandResult, ack } from './command-result';
import { AssignIssueCommand } from './assign-issue.command';
import { WriteAccess } from './write-access';

@CommandHandler(AssignIssueCommand)
export class AssignIssueCommandHandler
  implements ICommandHandler<AssignIssueCommand>
{
  constructor(private readonly access: WriteAccess) {}

  async execute(command: AssignIssueCommand): Promise<CommandResult> {
    const { issue, project } = await this.access.issueForContributor(
      command.issueId,
      command.actorId,
    );
    if (command.assigneeId)
      this.access.assertAssignable(project, command.assigneeId);
    issue.assign(command.actorId, command.assigneeId);
    await issue.commitAndWait();
    return ack(issue);
  }
}