1 package com.app.SuperMarketSystem.service;
2
3 import com.app.SuperMarketSystem.dto.ApiResponse;
4 import com.app.SuperMarketSystem.model.Category;
5 import com.app.SuperMarketSystem.model.Product;
6 import com.app.SuperMarketSystem.repository.CategoryRepository;
7 import org.springframework.beans.factory.annotation.Autowired;
8 import org.springframework.http.HttpStatus;
9 import org.springframework.stereotype.Service;
10
11 import java.util.List;
12
13 @Service
14 public class CategoryService {
15 private final CategoryRepository categoryRepository;
16
17 @Autowired
18 public CategoryService(CategoryRepository categoryRepository) {
19 this.categoryRepository = categoryRepository;
20 }
21
22 public ApiResponse findAllCategories() {
23 ApiResponse apiResponse = new ApiResponse();
24 try {
25 List<Category> categoriesList = categoryRepository.findAll();
26 if (categoriesList.isEmpty()) {
27 apiResponse.setMessage("No categories found within the database");
28 apiResponse.setStatus(HttpStatus.NOT_FOUND.value());
29 apiResponse.setData(null);
30 } else {
31 apiResponse.setMessage("Successfully fetched categories from the database");
32 apiResponse.setData(categoriesList);
33 apiResponse.setStatus(HttpStatus.OK.value());
34 }
35 return apiResponse;
36 } catch (Exception e) {
37 apiResponse.setMessage(e.getMessage());
38 apiResponse.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
39 return apiResponse;
40 }
41 }
42
43 public ApiResponse addCategory(Category category) {
44 ApiResponse apiResponse = new ApiResponse();
45 try {
46 categoryRepository.save(category);
47 apiResponse.setMessage("Successfully added category in the database");
48 apiResponse.setData(category);
49 apiResponse.setStatus(HttpStatus.OK.value());
50 return apiResponse;
51 } catch (Exception e) {
52 apiResponse.setMessage(e.getMessage());
53 apiResponse.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
54 return apiResponse;
55 }
56 }
57
58 public ApiResponse deleteCategory(String categoryId) {
59 ApiResponse apiResponse = new ApiResponse();
60 try {
61 Category category = categoryRepository.getById(categoryId);
62 if (null != category) {
63 category.setProducts(null);
64 categoryRepository.delete(category);
65 apiResponse.setStatus(HttpStatus.OK.value());
66 apiResponse.setMessage("Successfully deleted category from the database");
67 } else {
68 apiResponse.setStatus(HttpStatus.NOT_FOUND.value());
69 apiResponse.setMessage("No such category found against this ID");
70 }
71 apiResponse.setData(null);
72 return apiResponse;
73 } catch (Exception e) {
74 apiResponse.setMessage(e.getMessage());
75 apiResponse.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
76 return apiResponse;
77 }
78 }
79
80 public ApiResponse updateCategory(Category category) {
81 ApiResponse apiResponse = new ApiResponse();
82 try {
83 Category existingCategory = categoryRepository.getById(category.getId());
84 if (null != existingCategory) {
85 categoryRepository.save(category);
86 apiResponse.setMessage("Successfully updated category within the database");
87 apiResponse.setData(category);
88 apiResponse.setStatus(HttpStatus.OK.value());
89 } else {
90 apiResponse.setStatus(HttpStatus.NOT_FOUND.value());
91 apiResponse.setMessage("No such category found against this ID");
92 apiResponse.setData(null);
93 }
94 return apiResponse;
95
96 } catch (Exception e) {
97 apiResponse.setMessage(e.getMessage());
98 apiResponse.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
99 return apiResponse;
100 }
101 }
102
103 public ApiResponse getCategoryById(String categoryId) {
104 ApiResponse apiResponse = new ApiResponse();
105 try {
106 Category category = categoryRepository.getById(categoryId);
107 if (null != category) {
108 apiResponse.setStatus(HttpStatus.OK.value());
109 apiResponse.setMessage("Successful");
110 apiResponse.setData(category);
111 } else {
112 apiResponse.setData(null);
113 apiResponse.setStatus(HttpStatus.NOT_FOUND.value());
114 apiResponse.setMessage("No such category found within the database");
115 }
116 return apiResponse;
117 } catch (Exception e) {
118 apiResponse.setMessage(e.getMessage());
119 apiResponse.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
120 return apiResponse;
121 }
122 }
123
124 public ApiResponse addProductsInCategory(String categoryId, List<Product> productList) {
125 ApiResponse apiResponse = new ApiResponse();
126 try {
127 Category category = categoryRepository.getById(categoryId);
128 if (null != category) {
129 if (productList.isEmpty()) {
130 apiResponse.setMessage("The product list is empty");
131 apiResponse.setData(productList);
132 } else {
133 category.getProducts().addAll(productList);
134 categoryRepository.save(category);
135 apiResponse.setMessage("Successfully added products within the category");
136 apiResponse.setData(category);
137 }
138 apiResponse.setStatus(HttpStatus.OK.value());
139 } else {
140 apiResponse.setMessage("No such category found within the database");
141 apiResponse.setData(null);
142 apiResponse.setStatus(HttpStatus.NOT_FOUND.value());
143 }
144 return apiResponse;
145 } catch (Exception e) {
146 apiResponse.setMessage(e.getMessage());
147 apiResponse.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
148 return apiResponse;
149 }
150 }
151 }