added pagination, searching, sorting

src/form/dto/query-form.dto.ts

@@ -0,0 +1,47 @@
+import { ApiPropertyOptional } from '@nestjs/swagger';
+import { Type } from 'class-transformer';
+import { IsEnum, IsInt, IsOptional, IsString, Max, Min } from 'class-validator';
+
+export enum SortOrder {
+  ASC = 'asc',
+  DESC = 'desc',
+}
+
+export enum SortBy {
+  NAME = 'name',
+  CREATED_AT = 'createdAt',
+  UPDATED_AT = 'updatedAt',
+  STATUS = 'status',
+}
+
+export class QueryFormDto {
+  @ApiPropertyOptional({ example: 1 })
+  @Type(() => Number)
+  @IsInt()
+  @Min(1)
+  @IsOptional()
+  page?: number = 1;
+
+  @ApiPropertyOptional({ example: 10 })
+  @Type(() => Number)
+  @IsInt()
+  @Min(1)
+  @Max(100)
+  @IsOptional()
+  limit?: number = 10;
+
+  @ApiPropertyOptional({ example: '' })
+  @IsString()
+  @IsOptional()
+  search?: string;
+
+  @ApiPropertyOptional({ enum: SortBy, example: SortBy.CREATED_AT })
+  @IsEnum(SortBy)
+  @IsOptional()
+  sortBy?: SortBy = SortBy.CREATED_AT;
+
+  @ApiPropertyOptional({ enum: SortOrder, example: SortOrder.DESC })
+  @IsEnum(SortOrder)
+  @IsOptional()
+  sortOrder?: SortOrder = SortOrder.DESC;
+}

src/form/form.controller.ts

@@ -6,12 +6,13 @@ import {
   Patch,
   Param,
   Delete,
+  Query,
 } from '@nestjs/common';
 import { FormService } from './form.service';
 import { ApiOperation } from '@nestjs/swagger';
 import { UpdateFieldDto } from './dto/update-field.dto';
 import { CreateUpdateDto } from './dto/create-update.dto';
-
+import { QueryFormDto } from './dto/query-form.dto';
 
 @Controller('form')
 export class FormController {
@@ -24,9 +25,9 @@ export class FormController {
   }
 
   @Get()
-  @ApiOperation({ summary: 'Find all forms' })
-  async findAll() {
-    return await this.formService.findAll();
+  @ApiOperation({ summary: 'Get all forms with pagination, search, sort' })
+  findAll(@Query() query: QueryFormDto) {
+    return this.formService.findAll(query);
   }
 
   @Get(':formId')

src/form/form.service.ts

@@ -1,4 +1,3 @@
-import { FormModule } from './form.module';
 import { Injectable, NotFoundException } from '@nestjs/common';
 import { InjectModel } from '@nestjs/mongoose';
 import { Form, FormDocument, Status } from './schemas/form.schema';
@@ -6,7 +5,20 @@ import { Model } from 'mongoose';
 import { v4 as uuidv4 } from 'uuid';
 import { UpdateFieldDto } from './dto/update-field.dto';
 import { CreateUpdateDto } from './dto/create-update.dto';
+import { QueryFormDto } from './dto/query-form.dto';
+import { FormQueryBuilder } from './helpers/form-query.builder';
+import { PaginatedResponse } from 'src/interfaces/paginated-response.interface';
 
+// Reusable projections
+const LIST_PROJECTION = {
+  _id: 0,
+  id: 1,
+  name: 1,
+  status: 1,
+  deletedAt: 1,
+  createdAt: 1,
+};
+const DETAIL_PROJECTION = { _id: 0, __v: 0 };
 
 @Injectable()
 export class FormService {
@@ -30,18 +42,50 @@ export class FormService {
     const updatedForm = await this.formModel.findOneAndUpdate(
       { id: dto.id },
       { $push: { fields: newField } },
-      { new: true },
+      { new: true, projection: DETAIL_PROJECTION },
     );
+
     if (!updatedForm) throw new NotFoundException(`Form ${dto.id} not found`);
-    return form;
+    return updatedForm;
   }
 
-  async findAll(): Promise<Form[]> {
-    return await this.formModel.find().exec();
+  async findAll(query: QueryFormDto): Promise<PaginatedResponse<Form>> {
+    const filter = FormQueryBuilder.buildFilter(query);
+    const sort = FormQueryBuilder.buildSort(query);
+    const { skip, limit } = FormQueryBuilder.buildPagination(query);
+
+    // Run count and data fetch in parallel
+    const [total, data] = await Promise.all([
+      this.formModel.countDocuments(filter),
+      this.formModel
+        .find(filter)
+        .select(DETAIL_PROJECTION)
+        .sort(sort)
+        .skip(skip)
+        .limit(limit)
+        .exec(),
+    ]);
+
+    const page = query.page ?? 1;
+
+    return {
+      data,
+      meta: {
+        total,
+        page,
+        limit,
+        totalPages: Math.ceil(total / limit),
+        hasNext: page * limit < total,
+        hasPrev: page > 1,
+      },
+    };
   }
 
   async find(formId: string): Promise<Form> {
-    const form = await this.formModel.findOne({ id: formId, deletedAt:null }).exec();
+    const form = await this.formModel
+      .findOne({ id: formId, deletedAt: null })
+      .select(LIST_PROJECTION)
+      .exec();
     if (!form) throw new NotFoundException(`Form ${formId} not found`);
     return form;
   }
@@ -63,6 +107,7 @@ export class FormService {
       {
         new: true,
         arrayFilters: [{ 'elem.id': fieldId }],
+        projection: DETAIL_PROJECTION,
       },
     );
     if (!form) throw new NotFoundException(`Form ${formId} not found`);
@@ -73,7 +118,7 @@ export class FormService {
     const form = await this.formModel.findOneAndUpdate(
       { id: formId },
       { $pull: { fields: { id: fieldId } } },
-      { new: true },
+      { new: true, projection: DETAIL_PROJECTION },
     );
     if (!form) throw new NotFoundException(`Form ${formId} not found`);
     return form;
@@ -87,7 +132,7 @@ export class FormService {
           deletedAt: new Date(),
         },
       },
-      { new: true },
+      { new: true, projection: DETAIL_PROJECTION },
     );
 
     if (!form) throw new NotFoundException(`Form ${FormId} not found`);
@@ -102,7 +147,7 @@ export class FormService {
           deletedAt: null,
         },
       },
-      { new: true },
+      { new: true, projection: DETAIL_PROJECTION },
     );
     if (!form) throw new NotFoundException(`Form ${FormId} not found`);
     return form;

src/form/helpers/form-query.builder.ts

@@ -0,0 +1,30 @@
+import { QueryFormDto, SortOrder } from '../dto/query-form.dto';
+
+export class FormQueryBuilder {
+  static buildFilter(query: QueryFormDto): Record<string, unknown> {
+    const filter: Record<string, unknown> = {};
+
+    if (query.search) {
+      filter.name = { $regex: query.search, $options: 'i' };
+    }
+
+    return filter;
+  }
+
+  // Build sort
+  static buildSort(query: QueryFormDto): Record<string, 1 | -1> {
+    return {
+      [query.sortBy ?? 'createdAt']: query.sortOrder === SortOrder.ASC ? 1 : -1,
+    };
+  }
+
+  // Build pagination
+  static buildPagination(query: QueryFormDto): { skip: number; limit: number } {
+    const page = query.page ?? 1;
+    const limit = query.limit ?? 10;
+    return {
+      skip: (page - 1) * limit,
+      limit,
+    };
+  }
+}

src/interfaces/paginated-response.interface.ts

@@ -0,0 +1,11 @@
+export interface PaginatedResponse<T> {
+  data: T[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+    hasNext: boolean;
+    hasPrev: boolean;
+  };
+}