feat(blog-category): add search functionality to BlogCategoryService

Author: Reaganz-Wat

src/modules/blog-category/blog-category.controller.ts

@@ -1,4 +1,15 @@
-import { Body, Controller, Post, UseGuards, Request, Patch, Param } from '@nestjs/common';
+import {
+  Body,
+  Controller,
+  Post,
+  UseGuards,
+  Request,
+  Patch,
+  Param,
+  Get,
+  Query,
+  NotFoundException,
+} from '@nestjs/common';
 import { ApiBearerAuth, ApiOperation, ApiResponse, ApiTags } from '@nestjs/swagger';
 import { SuperAdminGuard } from '../../guards/super-admin.guard';
 import { BlogCategoryService } from './blog-category.service';
@@ -36,4 +47,14 @@ export class BlogCategoryController {
   async updateBlogCategory(@Param('id') id: string, @Body() updateBlogCategoryDto: UpdateBlogCategoryDto) {
     return await this.blogCategoryService.updateOrganisationCategory(id, updateBlogCategoryDto);
   }
+
+  @Get('search')
+  @ApiOperation({ summary: 'Search blog categories by name' })
+  @ApiResponse({ status: 200, description: 'Categories found' })
+  @ApiResponse({ status: 404, description: 'No categories found' })
+  async searchCategories(@Query('term') searchTerm: string) {
+    console.log('Search Term: ', searchTerm);
+    const result = await this.blogCategoryService.searchCategories(searchTerm);
+    return result;
+  }
 }

src/modules/blog-category/blog-category.service.ts

@@ -1,7 +1,7 @@
 import { Injectable } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { BlogCategory } from './entities/blog-category.entity';
-import { Repository } from 'typeorm';
+import { Like, Repository } from 'typeorm';
 import { CreateBlogCategoryDto } from './dto/create-blog-category.dto';
 import { CustomHttpException } from '../../helpers/custom-http-filter';
 import { CATEGORY_NOT_FOUND, ORG_NOT_FOUND } from '../../helpers/SystemMessages';
@@ -29,4 +29,37 @@ export class BlogCategoryService {
     await this.blogCategoryRepository.save(category);
     return { data: category, message: 'Organisation category updated successfully.' };
   }
+
+  async searchCategories(searchTerm: string): Promise<{
+    status: string;
+    status_code: number;
+    message: string;
+    data: { categories: BlogCategory[]; total: number };
+  }> {
+    // Handle empty search term
+    if (!searchTerm || searchTerm.trim() === '') {
+      return {
+        status: 'success',
+        status_code: 200,
+        message: 'No search term provided',
+        data: { categories: [], total: 0 },
+      };
+    }
+
+    // Perform a case-insensitive search
+    const categories = await this.blogCategoryRepository
+      .createQueryBuilder('category')
+      .where('LOWER(category.name) LIKE LOWER(:searchTerm)', {
+        searchTerm: `%${searchTerm}%`,
+      })
+      .getMany();
+
+    // Return the results in the desired format
+    return {
+      status: 'success',
+      status_code: 200,
+      message: categories.length > 0 ? 'Categories found successfully' : 'No categories found',
+      data: { categories, total: categories.length },
+    };
+  }
 }

src/modules/blog-category/tests/blog-category.service.spec.ts

@@ -57,4 +57,66 @@ describe('BlogCategoryService', () => {
 
     await expect(service.createOrganisationCategory(createBlogCategoryDto)).rejects.toThrow('Save failed');
   });
+
+  it('should return empty array and total 0 for empty search term', async () => {
+    const result = await service.searchCategories('');
+    expect(result).toEqual({
+      status: 'success',
+      status_code: 200,
+      message: 'No search term provided',
+      data: { categories: [], total: 0 },
+    });
+  });
+
+  it('should return matching categories for partial search term', async () => {
+    const mockCategories = [
+      { id: '1', name: 'Technology' },
+      { id: '2', name: 'Tech News' },
+    ];
+
+    jest.spyOn(repository, 'createQueryBuilder').mockReturnValue({
+      where: jest.fn().mockReturnThis(),
+      getMany: jest.fn().mockResolvedValue(mockCategories),
+    } as any);
+
+    const result = await service.searchCategories('tech');
+    expect(result).toEqual({
+      status: 'success',
+      status_code: 200,
+      message: 'Categories found successfully',
+      data: { categories: mockCategories, total: 2 },
+    });
+  });
+
+  it('should return empty array and total 0 for no matches', async () => {
+    jest.spyOn(repository, 'createQueryBuilder').mockReturnValue({
+      where: jest.fn().mockReturnThis(),
+      getMany: jest.fn().mockResolvedValue([]),
+    } as any);
+
+    const result = await service.searchCategories('nonexistent');
+    expect(result).toEqual({
+      status: 'success',
+      status_code: 200,
+      message: 'No categories found',
+      data: { categories: [], total: 0 },
+    });
+  });
+
+  it('should handle search term with special characters', async () => {
+    const mockCategories = [{ id: '1', name: 'C# Programming' }];
+
+    jest.spyOn(repository, 'createQueryBuilder').mockReturnValue({
+      where: jest.fn().mockReturnThis(),
+      getMany: jest.fn().mockResolvedValue(mockCategories),
+    } as any);
+
+    const result = await service.searchCategories('C#');
+    expect(result).toEqual({
+      status: 'success',
+      status_code: 200,
+      message: 'Categories found successfully',
+      data: { categories: mockCategories, total: 1 },
+    });
+  });
 });