first commit

libs/api/tracker/application/src/lib/queries/get-board.query-handler.ts

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+import { IQueryHandler, QueryHandler } from '@nestjs/cqrs';
+import { IssueStatus } from '@task-stream/api/tracker/domain';
+import { FindIssuesRepository } from '../ports/find-issues.repository';
+import { BoardColumn, GetBoardQuery } from './get-board.query';
+import { ReadAccess } from './read-access';
+
+const BOARD_COLUMNS: IssueStatus[] = [
+  IssueStatus.BACKLOG,
+  IssueStatus.TODO,
+  IssueStatus.IN_PROGRESS,
+  IssueStatus.IN_REVIEW,
+  IssueStatus.READY_FOR_QA,
+  IssueStatus.IN_QA,
+  IssueStatus.QA_FAILED,
+  IssueStatus.DONE,
+];
+
+@QueryHandler(GetBoardQuery)
+export class GetBoardQueryHandler
+  implements IQueryHandler<GetBoardQuery, BoardColumn[]>
+{
+  constructor(
+    private readonly findIssues: FindIssuesRepository,
+    private readonly access: ReadAccess,
+  ) {}
+
+  async execute(query: GetBoardQuery): Promise<BoardColumn[]> {
+    await this.access.assertCanView(query.filter.projectId, query.viewerId);
+    return Promise.all(
+      BOARD_COLUMNS.map(async (status) => {
+        const page = await this.findIssues.search({
+          ...query.filter,
+          statuses: [status],
+          limit: Math.min(query.perColumn, 200),
+          offset: 0,
+        });
+        return { status, issues: page.items, total: page.total };
+      }),
+    );
+  }
+}