first commit

libs/api/tracker/application/src/lib/commands/add-comment.command-handler.ts

@@ -0,0 +1,33 @@
+import { CommandHandler, EventPublisher, ICommandHandler } from '@nestjs/cqrs';
+import { CommentFactory } from '@task-stream/api/tracker/domain';
+import { AddCommentCommand } from './add-comment.command';
+import { CommandResult, ack } from './command-result';
+import { WriteAccess } from './write-access';
+
+@CommandHandler(AddCommentCommand)
+export class AddCommentCommandHandler
+  implements ICommandHandler<AddCommentCommand>
+{
+  constructor(
+    private readonly access: WriteAccess,
+    private readonly commentFactory: CommentFactory,
+    private readonly eventPublisher: EventPublisher,
+  ) {}
+
+  async execute(command: AddCommentCommand): Promise<CommandResult> {
+    const { issue } = await this.access.issueForContributor(
+      command.issueId,
+      command.actorId,
+    );
+    const comment = this.commentFactory.create({
+      issueId: issue.id,
+      projectId: issue.projectId,
+      authorId: command.actorId,
+      body: command.body,
+    });
+
+    this.eventPublisher.mergeObjectContext(comment);
+    await comment.commitAndWait();
+    return ack(comment);
+  }
+}