improvement: task assignment flow added. cases and tasks feature updated accordingly.

backend/src/modules/tasks/dto/tasks.dto.ts

@@ -81,6 +81,12 @@ export class ListLabTasksDto {
   @IsUUID()
   labCaseId?: string;
 
+  /** When true, only tasks assigned to the current user. */
+  @IsOptional()
+  @Transform(toBoolean)
+  @IsBoolean()
+  assignedToMe?: boolean;
+
   @IsOptional()
   @IsIn(['date', 'status', 'clinic', 'patient', 'important', 'prosthesis', 'taskType'])
   sortBy?: TaskSortField;
@@ -147,6 +153,12 @@ export class LocateTaskPageDto {
   @IsString()
   stepCompleted?: string;
 
+  /** When true, only tasks assigned to the current user. */
+  @IsOptional()
+  @Transform(toBoolean)
+  @IsBoolean()
+  assignedToMe?: boolean;
+
   @IsOptional()
   @IsIn(['date', 'status', 'clinic', 'patient', 'important', 'prosthesis', 'taskType'])
   sortBy?: TaskSortField;

backend/src/modules/tasks/tasks.service.ts

@@ -17,6 +17,7 @@ import { hasEffectivePermission } from '../../common/membership-permissions';
 
 const taskListInclude = {
   lastStatusChangedBy: { select: { id: true, name: true } },
+  assignee: { select: { id: true, name: true } },
   labCase: {
     include: {
       treatment: {
@@ -55,7 +56,7 @@ export class TasksService {
     const limit = Math.min(Math.max(query.limit ?? 50, 1), 100);
     const skip = (page - 1) * limit;
 
-    const where = await this.buildListWhere(labOrganizationId, query);
+    const where = await this.buildListWhere(labOrganizationId, actorUserId, query);
 
     const [items, total] = await Promise.all([
       this.prisma.labCaseTask.findMany({
@@ -117,7 +118,7 @@ export class TasksService {
       throw new NotFoundException('Task not found');
     }
 
-    const where = await this.buildListWhere(labOrganizationId, listQuery);
+    const where = await this.buildListWhere(labOrganizationId, actorUserId, listQuery);
     const inFilteredSet = await this.prisma.labCaseTask.count({
       where: { AND: [where, { id: query.taskId }] },
     });
@@ -176,6 +177,10 @@ export class TasksService {
       throw new NotFoundException('Task not found');
     }
 
+    if (task.assigneeUserId && task.assigneeUserId !== actorUserId) {
+      throw new ForbiddenException('This task is assigned to another staff member');
+    }
+
     const updated = await this.prisma.$transaction(async (tx) => {
       const result = await tx.labCaseTask.update({
         where: { id: taskId },
@@ -263,6 +268,7 @@ export class TasksService {
 
   private async buildListWhere(
     labOrganizationId: string,
+    actorUserId: string,
     query: ListLabTasksDto,
   ): Promise<Prisma.LabCaseTaskWhereInput> {
     const sentAtFilter: Prisma.DateTimeNullableFilter = { not: null };
@@ -306,6 +312,7 @@ export class TasksService {
       ...(query.labCaseId ? { labCaseId: query.labCaseId } : {}),
       labCase: labCaseScope,
       ...(status !== undefined ? { status } : {}),
+      ...(query.assignedToMe ? { assigneeUserId: actorUserId } : {}),
     };
 
     const stepCompleted = query.stepCompleted?.trim();
@@ -327,12 +334,16 @@ export class TasksService {
     }
 
     return {
-      ...base,
-      OR: completedGroups.map((group) => ({
-        labCaseId: group.labCaseId,
-        treatmentDetailId: group.treatmentDetailId,
-        prosthesisTypeCode: group.prosthesisTypeCode,
-      })),
+      AND: [
+        base,
+        {
+          OR: completedGroups.map((group) => ({
+            labCaseId: group.labCaseId,
+            treatmentDetailId: group.treatmentDetailId,
+            prosthesisTypeCode: group.prosthesisTypeCode,
+          })),
+        },
+      ],
     };
   }
 
@@ -348,6 +359,7 @@ export class TasksService {
       sentFrom: query.sentFrom,
       sentTo: query.sentTo,
       stepCompleted: query.stepCompleted,
+      assignedToMe: query.assignedToMe,
       sortBy: query.sortBy,
       sortDir: query.sortDir,
       limit: query.limit,
@@ -527,6 +539,10 @@ export class TasksService {
       stepLabel: task.stepLabel,
       status: task.status,
       isImportant: task.labCase.isImportant,
+      assignee: task.assignee
+        ? { id: task.assignee.id, name: task.assignee.name }
+        : null,
+      assignedAt: task.assignedAt?.toISOString() ?? null,
       lastStatusChangedAt: task.lastStatusChangedAt?.toISOString() ?? null,
       lastStatusChangedBy: task.lastStatusChangedBy
         ? { id: task.lastStatusChangedBy.id, name: task.lastStatusChangedBy.name }