refactor: made project service to use pagination

src/common/helpers/pagination.helper.ts

@@ -0,0 +1,29 @@
+import { IPageFormat } from "../interfaces/IPagination";
+
+export function buildPageFormat(
+  page: number,
+  limit: number,
+  totalItems: number,
+  baseUrl: string,
+): IPageFormat {
+  const totalPages = Math.ceil(totalItems / limit);
+
+  const prevPage =
+    page > 1
+      ? `${baseUrl}?page=${page - 1}&limit=${limit}`
+      : false;
+
+  const nextPage =
+    page < totalPages
+      ? `${baseUrl}?page=${page + 1}&limit=${limit}`
+      : false;
+
+  return {
+    page,
+    limit,
+    totalItems,
+    totalPages,
+    prevPage,
+    nextPage,
+  };
+}

src/common/interfaces/paginated-result.interface.ts

@@ -0,0 +1,6 @@
+import { IPageFormat } from "./IPagination";
+
+export interface PaginatedResult<T> {
+  data: T[];
+  meta: IPageFormat;
+}

src/modules/task-manager/controllers/project.controller.ts

@@ -1,8 +1,10 @@
-import { Controller, Get, Post, Patch, Delete, Param, Body, Query } from '@nestjs/common';
+import { Controller, Get, Post, Patch, Delete, Param, Body, Query, Req } from '@nestjs/common';
 import { ApiTags, ApiOperation, ApiResponse, ApiParam, ApiQuery } from '@nestjs/swagger';
+import { Request } from 'express';
 import { ProjectService } from '../providers/project.service';
 import { CreateProjectDto } from '../dto/project/create-project.dto';
 import { UpdateProjectDto } from '../dto/project/update-project.dto';
+import { PaginationDto } from '../../../common/DTO/pagination.dto';
 import { TMProject } from '../entities/project.entity';
 
 @ApiTags('Task Manager - Projects')
@@ -13,10 +15,15 @@ export class ProjectController {
   @Get()
   @ApiOperation({ summary: 'Get all projects, optionally filtered by workspace' })
   @ApiQuery({ name: 'workspaceId', required: false, description: 'Filter projects by workspace ID' })
-  @ApiResponse({ status: 200, description: 'List of projects', type: [TMProject] })
-  findAll(@Query('workspaceId') workspaceId?: string): Promise<TMProject[]> {
-    if (workspaceId) return this.projectService.findByWorkspace(workspaceId);
-    return this.projectService.findAll();
+  @ApiResponse({ status: 200, description: 'Paginated list of projects' })
+  findAll(
+    @Query() pagination: PaginationDto,
+    @Query('workspaceId') workspaceId: string,
+    @Req() req: Request,
+  ) {
+    const baseUrl = `${req.protocol}://${req.get('host')}${req.path}`;
+    if (workspaceId) return this.projectService.findByWorkspace(workspaceId, pagination, baseUrl);
+    return this.projectService.findAll(pagination, baseUrl);
   }
 
   @Get(':id')
@@ -50,7 +57,7 @@ export class ProjectController {
   @Delete(':id')
   @ApiOperation({ summary: 'Delete a project' })
   @ApiParam({ name: 'id', description: 'Project ID' })
-  @ApiResponse({ status: 200, description: 'Project deleted' })
+  @ApiResponse({ status: 200, description: 'Project deleted', type: TMProject })
   @ApiResponse({ status: 404, description: 'Project not found' })
   remove(@Param('id') id: string): Promise<TMProject> {
     return this.projectService.remove(id);

src/modules/task-manager/providers/project.service.ts

@@ -1,12 +1,15 @@
-import { BadRequestException, Injectable, NotFoundException } from "@nestjs/common";
-import { InjectRepository } from "@nestjs/typeorm";
-import { In, Repository } from "typeorm";
-import { ProjectRepository } from "../repositories/project.repository";
-import { TMProject } from "../entities/project.entity";
-import { CreateProjectDto } from "../dto/project/create-project.dto";
-import { UpdateProjectDto } from "../dto/project/update-project.dto";
-import { User } from "../../users/entities/user.entity";
-import { WorkspaceRepository } from "../repositories/workspace.repository";
+import { BadRequestException, Injectable, NotFoundException } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { In, Repository } from 'typeorm';
+import { ProjectRepository } from '../repositories/project.repository';
+import { WorkspaceRepository } from '../repositories/workspace.repository';
+import { TMProject } from '../entities/project.entity';
+import { CreateProjectDto } from '../dto/project/create-project.dto';
+import { UpdateProjectDto } from '../dto/project/update-project.dto';
+import { PaginationDto } from '../../../common/DTO/pagination.dto';
+import { PaginatedResult } from '../../../common/interfaces/paginated-result.interface';
+import { buildPageFormat } from '../../../common/helpers/pagination.helper';
+import { User } from '../../users/entities/user.entity';
 
 @Injectable()
 export class ProjectService {
@@ -17,12 +20,34 @@ export class ProjectService {
     private readonly userRepository: Repository<User>,
   ) {}
 
-  findAll(): Promise<TMProject[]> {
-    return this.projectRepository.findAll();
+  async findAll(pagination: PaginationDto, baseUrl: string): Promise<PaginatedResult<TMProject>> {
+    const page = pagination.page ?? 1;
+    const limit = pagination.limit ?? 10;
+    const skip = (page - 1) * limit;
+
+    const [data, totalItems] = await this.projectRepository.findAll(skip, limit);
+
+    return {
+      data,
+      meta: buildPageFormat(page, limit, totalItems, baseUrl),
+    };
   }
 
-  findByWorkspace(workspaceId: string): Promise<TMProject[]> {
-    return this.projectRepository.findByWorkspace(workspaceId);
+  async findByWorkspace(
+    workspaceId: string,
+    pagination: PaginationDto,
+    baseUrl: string,
+  ): Promise<PaginatedResult<TMProject>> {
+    const page = pagination.page ?? 1;
+    const limit = pagination.limit ?? 10;
+    const skip = (page - 1) * limit;
+
+    const [data, totalItems] = await this.projectRepository.findByWorkspace(workspaceId, skip, limit);
+
+    return {
+      data,
+      meta: buildPageFormat(page, limit, totalItems, baseUrl),
+    };
   }
 
   async findOne(id: string): Promise<TMProject> {
@@ -46,7 +71,9 @@ export class ProjectService {
       const workspaceUserIds = workspace.users.map((u) => u.id);
       const invalidUsers = userIds.filter((id) => !workspaceUserIds.includes(id));
       if (invalidUsers.length) {
-        throw new BadRequestException(`Users [${invalidUsers.join(", ")}] are not members of this workspace`);
+        throw new BadRequestException(
+          `Users [${invalidUsers.join(', ')}] are not members of this workspace`,
+        );
       }
       project.users = await this.userRepository.findBy({ id: In(userIds) });
     }
@@ -72,7 +99,9 @@ export class ProjectService {
         const workspaceUserIds = workspace.users.map((u) => u.id);
         const invalidUsers = userIds.filter((uid) => !workspaceUserIds.includes(uid));
         if (invalidUsers.length) {
-          throw new BadRequestException(`Users [${invalidUsers.join(", ")}] are not members of this workspace`);
+          throw new BadRequestException(
+            `Users [${invalidUsers.join(', ')}] are not members of this workspace`,
+          );
         }
         project.users = await this.userRepository.findBy({ id: In(userIds) });
       } else {
@@ -86,7 +115,6 @@ export class ProjectService {
   async remove(id: string): Promise<TMProject> {
     const project = await this.findOne(id);
     await this.projectRepository.delete(id);
-
     return project;
   }
-}
+}

src/modules/task-manager/repositories/project.repository.ts

@@ -1,7 +1,7 @@
-import { Injectable } from "@nestjs/common";
-import { InjectRepository } from "@nestjs/typeorm";
-import { Repository } from "typeorm";
-import { TMProject } from "../entities/project.entity";
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { TMProject } from '../entities/project.entity';
 
 @Injectable()
 export class ProjectRepository {
@@ -10,23 +10,27 @@ export class ProjectRepository {
     private readonly repository: Repository<TMProject>,
   ) {}
 
-  findAll() {
-    return this.repository.find({
-      relations: ["workspace", "taskPhases", "users"],
+  findAll(skip: number, take: number) {
+    return this.repository.findAndCount({
+      relations: ['workspace', 'taskPhases', 'users'],
+      skip,
+      take,
     });
   }
 
-  findByWorkspace(workspaceId: string) {
-    return this.repository.find({
+  findByWorkspace(workspaceId: string, skip: number, take: number) {
+    return this.repository.findAndCount({
       where: { workspaceId },
-      relations: ["taskPhases", "users"],
+      relations: ['taskPhases', 'users'],
+      skip,
+      take,
     });
   }
 
   findOneById(id: string) {
     return this.repository.findOne({
       where: { id },
-      relations: ["workspace", "taskPhases", "users"],
+      relations: ['workspace', 'taskPhases', 'users'],
     });
   }
 
@@ -45,4 +49,4 @@ export class ProjectRepository {
   delete(id: string) {
     return this.repository.delete(id);
   }
-}
+}