fix(gateway): enforce task and mission ownership

apps/gateway/src/tasks/tasks.controller.ts

@@ -28,17 +28,48 @@ export class TasksController {
 
   @Get()
   async list(
+    @CurrentUser() user: { id: string },
     @Query('projectId') projectId?: string,
     @Query('missionId') missionId?: string,
     @Query('status') status?: string,
   ) {
-    if (projectId) return this.brain.tasks.findByProject(projectId);
-    if (missionId) return this.brain.tasks.findByMission(missionId);
-    if (status)
-      return this.brain.tasks.findByStatus(
-        status as Parameters<typeof this.brain.tasks.findByStatus>[0],
-      );
-    return this.brain.tasks.findAll();
+    if (projectId) {
+      await this.getOwnedProject(projectId, user.id, 'Task');
+      return this.brain.tasks.findByProject(projectId);
+    }
+    if (missionId) {
+      await this.getOwnedMission(missionId, user.id, 'Task');
+      return this.brain.tasks.findByMission(missionId);
+    }
+
+    const [projects, missions, tasks] = await Promise.all([
+      this.brain.projects.findAll(),
+      this.brain.missions.findAll(),
+      status
+        ? this.brain.tasks.findByStatus(
+            status as Parameters<typeof this.brain.tasks.findByStatus>[0],
+          )
+        : this.brain.tasks.findAll(),
+    ]);
+
+    const ownedProjectIds = new Set(
+      projects.filter((project) => project.ownerId === user.id).map((project) => project.id),
+    );
+    const ownedMissionIds = new Set(
+      missions
+        .filter(
+          (ownedMission) =>
+            typeof ownedMission.projectId === 'string' &&
+            ownedProjectIds.has(ownedMission.projectId),
+        )
+        .map((ownedMission) => ownedMission.id),
+    );
+
+    return tasks.filter(
+      (task) =>
+        (task.projectId ? ownedProjectIds.has(task.projectId) : false) ||
+        (task.missionId ? ownedMissionIds.has(task.missionId) : false),
+    );
   }
 
   @Get(':id')
@@ -47,7 +78,13 @@ export class TasksController {
   }
 
   @Post()
-  async create(@Body() dto: CreateTaskDto) {
+  async create(@Body() dto: CreateTaskDto, @CurrentUser() user: { id: string }) {
+    if (dto.projectId) {
+      await this.getOwnedProject(dto.projectId, user.id, 'Task');
+    }
+    if (dto.missionId) {
+      await this.getOwnedMission(dto.missionId, user.id, 'Task');
+    }
     return this.brain.tasks.create({
       title: dto.title,
       description: dto.description,