add promotion endpoint

kbazaar/src/main/java/com/kampus/kbazaar/cart/CartController.java

@@ -1,39 +1,14 @@
 package com.kampus.kbazaar.cart;
 
-import com.kampus.kbazaar.product.Product;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
 @RestController
 @RequestMapping("/api/v1")
 public class CartController {
-    protected static final Cart[] carts =
-            new Cart[] {
-                new Cart(1, new Product[] {new Product(11L, "Product 1", "sku-1", 100.0, 10)}),
-                new Cart(
-                        2,
-                        new Product[] {
-                            new Product(22L, "Product 2", "sku-2", 200.0, 2),
-                        }),
-                new Cart(
-                        3,
-                        new Product[] {
-                            new Product(33L, "Product 3", "sku-3", 300.0, 3),
-                        }),
-            };
 
-    @PostMapping("/carts/{id}/additems")
-    public ResponseEntity<Cart> addProductToCart(
-            @PathVariable String id, @RequestBody Product[] products) {
-        Cart cart =
-                new Cart(
-                        1,
-                        new Product[] {
-                            new Product(11L, "Product 1", "sku-1", 100.0, 10),
-                            new Product(22L, "Product 2", "sku-2", 200.0, 2),
-                            new Product(33L, "Product 3", "sku-3", 300.0, 3),
-                        });
-
-        return ResponseEntity.ok(cart);
+    @GetMapping("/carts")
+    public ResponseEntity getCart() {
+        return ResponseEntity.ok().build();
     }
 }

kbazaar/src/main/java/com/kampus/kbazaar/promotion/Promotion.java

@@ -0,0 +1,77 @@
+package com.kampus.kbazaar.promotion;
+
+import jakarta.persistence.*;
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+import java.util.List;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Entity(name = "promotion")
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class Promotion {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "promotion_id")
+    private Long promotionId;
+
+    @Column(name = "code", nullable = false)
+    private String code;
+
+    @Column(name = "name", nullable = false)
+    private String name;
+
+    @Column(name = "description")
+    private String description;
+
+    @Column(name = "start_date", nullable = false)
+    private LocalDateTime startDate;
+
+    @Column(name = "end_date", nullable = false)
+    private LocalDateTime endDate;
+
+    @Column(name = "discount_type", nullable = false)
+    private String discountType;
+
+    @Column(name = "discount_amount")
+    private BigDecimal discountAmount;
+
+    @Column(name = "max_discount_amount")
+    private BigDecimal maxDiscountAmount;
+
+    @Column(name = "applicable_to", nullable = false)
+    private String applicableTo;
+
+    @ElementCollection
+    @CollectionTable(
+            name = "promotion_product_skus",
+            joinColumns = @JoinColumn(name = "promotion_id"))
+    @Column(name = "product_sku")
+    private List<String> productSkus;
+
+    @Column(name = "min_quantity")
+    private Integer minQuantity;
+
+    @Column(name = "free_quantity")
+    private Integer freeQuantity;
+
+    public PromotionResponse toResponse() {
+        return new PromotionResponse(
+                this.promotionId,
+                this.code,
+                this.name,
+                this.description,
+                this.startDate,
+                this.endDate,
+                this.discountType,
+                this.discountAmount,
+                this.maxDiscountAmount,
+                this.applicableTo,
+                this.productSkus,
+                this.minQuantity,
+                this.freeQuantity);
+    }
+}

kbazaar/src/main/java/com/kampus/kbazaar/promotion/PromotionController.java

@@ -1,3 +1,72 @@
 package com.kampus.kbazaar.promotion;
 
-public class PromotionController {}
+import com.kampus.kbazaar.exceptions.NotFoundException;
+import io.swagger.v3.oas.annotations.media.ArraySchema;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.responses.ApiResponses;
+import java.util.List;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/v1")
+public class PromotionController {
+    private PromotionService promotionService;
+
+    public PromotionController(PromotionService promotionService) {
+        this.promotionService = promotionService;
+    }
+
+    @ApiResponses({
+        @ApiResponse(
+                responseCode = "200",
+                description = "list all promotions",
+                content = {
+                    @Content(
+                            mediaType = "application/json",
+                            array =
+                                    @ArraySchema(
+                                            schema =
+                                                    @Schema(
+                                                            implementation =
+                                                                    PromotionResponse.class)))
+                }),
+        @ApiResponse(
+                responseCode = "500",
+                description = "internal server error",
+                content =
+                        @Content(
+                                mediaType = "application/json",
+                                schema = @Schema(implementation = NotFoundException.class)))
+    })
+    @GetMapping("/promotions")
+    public List<PromotionResponse> getAllPromotions() {
+        return promotionService.getAll();
+    }
+
+    @ApiResponses({
+        @ApiResponse(
+                responseCode = "200",
+                description = "get promotion by code",
+                content = {
+                    @Content(
+                            mediaType = "application/json",
+                            schema = @Schema(implementation = PromotionResponse.class))
+                }),
+        @ApiResponse(
+                responseCode = "404",
+                description = "promotion not found",
+                content = {
+                    @Content(
+                            mediaType = "application/json",
+                            schema = @Schema(implementation = NotFoundException.class))
+                })
+    })
+    @GetMapping("/promotions/{code}")
+    public PromotionResponse getPromotionByCode(String code) {
+        return promotionService.getPromotionByCode(code);
+    }
+}

kbazaar/src/main/java/com/kampus/kbazaar/promotion/PromotionRepository.java

@@ -0,0 +1,10 @@
+package com.kampus.kbazaar.promotion;
+
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface PromotionRepository extends JpaRepository<Promotion, Long> {
+    Optional<Promotion> findByCode(String code);
+}

kbazaar/src/main/java/com/kampus/kbazaar/promotion/PromotionResponse.java

@@ -0,0 +1,20 @@
+package com.kampus.kbazaar.promotion;
+
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+import java.util.List;
+
+public record PromotionResponse(
+        Long promotionId,
+        String code,
+        String name,
+        String description,
+        LocalDateTime startDate,
+        LocalDateTime endDate,
+        String discountType,
+        BigDecimal discountAmount,
+        BigDecimal maxDiscountAmount,
+        String applicableTo,
+        List<String> productSkus,
+        Integer minQuantity,
+        Integer freeQuantity) {}

kbazaar/src/main/java/com/kampus/kbazaar/promotion/PromotionService.java

@@ -0,0 +1,25 @@
+package com.kampus.kbazaar.promotion;
+
+import com.kampus.kbazaar.exceptions.NotFoundException;
+import java.util.List;
+import org.springframework.stereotype.Service;
+
+@Service
+public class PromotionService {
+    private PromotionRepository promotionRepository;
+
+    public PromotionService(PromotionRepository promotionRepository) {
+        this.promotionRepository = promotionRepository;
+    }
+
+    public List<PromotionResponse> getAll() {
+        return promotionRepository.findAll().stream().map(p -> p.toResponse()).toList();
+    }
+
+    public PromotionResponse getPromotionByCode(String code) {
+        return promotionRepository
+                .findByCode(code)
+                .map(p -> p.toResponse())
+                .orElseThrow(() -> new NotFoundException("Promotion not found"));
+    }
+}

kbazaar/src/main/resources/sql/data/promotions.sql

@@ -0,0 +1,17 @@
+INSERT INTO promotion (code, name, description, start_date, end_date, discount_type, discount_amount, applicable_to)
+VALUES ('FIXEDAMOUNT10', 'Fixed Amount $10 Off Entire Cart', 'Get $10 off on your entire cart purchase.', '2024-03-25', '2024-04-25', 'FIXED_AMOUNT', 10.00, 'ENTIRE_CART') ON CONFLICT DO NOTHING;
+
+INSERT INTO promotion (code, name, description, start_date, end_date, discount_type, discount_amount, applicable_to)
+VALUES ('THIRTYPERCENTOFF', '30% Discount Off Entire Cart', 'Get 30% off on your entire cart purchase.', '2024-03-25', '2024-04-25', 'PERCENTAGE', 30.00, 'ENTIRE_CART') ON CONFLICT DO NOTHING;
+
+INSERT INTO promotion (code, name, description, start_date, end_date, discount_type, discount_amount, max_discount_amount, applicable_to)
+VALUES ('THIRTYPERCENTOFFLIMIT200', '30% Discount Up to 200 Baht Off Entire Cart', 'Get 30% off up to 200 Baht on your entire cart purchase.', '2024-03-25', '2024-04-25', 'PERCENTAGE', 30.00, 200.00, 'ENTIRE_CART') ON CONFLICT DO NOTHING;
+
+INSERT INTO promotion (code, name, description, start_date, end_date, discount_type, min_quantity, free_quantity, applicable_to)
+VALUES ('BUY1GET1FREE', 'Buy 1 Get 1 Free', 'Buy one product and get one free.', '2024-03-25', '2024-04-25', 'buy1_get1', 1, 1,'ENTIRE_CART') ON CONFLICT DO NOTHING;
+
+INSERT INTO promotion (code, name, description, start_date, end_date, discount_type, min_quantity, free_quantity, applicable_to, product_skus)
+VALUES ('BUY2GET1FREE', 'Buy 2 Get 1 Free', 'Buy two products and get one free.', '2024-03-25', '2024-04-25', 'buy2_get1', 2, 1, 'SPECIFIC_PRODUCTS', '{"BEV-FANTA", "BEV-RED-BULL", "BEV-7UP" }') ON CONFLICT DO NOTHING;
+
+INSERT INTO promotion (code, name, description, start_date, end_date, discount_type, discount_amount, applicable_to, product_skus)
+VALUES ('SPECIFICPRODUCT30OFF', '30% Discount on Specific Products', 'Get 30% off on specific products.', '2024-03-25', '2024-04-25', 'PERCENTAGE', 30.00, 'SPECIFIC_PRODUCTS', '{"MOBILE-APPLE-IPHONE-12-PRO", "STATIONERY-NOTEBOOK-MOLESKINE"}') ON CONFLICT DO NOTHING;

kbazaar/src/main/resources/sql/schema/promotion.sql

@@ -0,0 +1,15 @@
+CREATE TABLE IF NOT EXISTS promotion (
+	promotion_id SERIAL PRIMARY KEY,
+	code VARCHAR(255) NOT NULL,
+	name VARCHAR(255) NOT NULL,
+	description TEXT,
+	start_date TIMESTAMP NOT NULL,
+	end_date TIMESTAMP NOT NULL,
+	discount_type VARCHAR(50) NOT NULL,
+	discount_amount DECIMAL(10, 2),
+	max_discount_amount DECIMAL(10, 2),
+	applicable_to VARCHAR(50) NOT NULL,
+	product_skus VARCHAR(255)[],
+	min_quantity INT,
+	free_quantity INT
+);

kbazaar/src/test/java/com/kampus/kbazaar/promotion/PromotionServiceTest.java

@@ -0,0 +1,66 @@
+package com.kampus.kbazaar.promotion;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+import com.kampus.kbazaar.exceptions.NotFoundException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+class PromotionServiceTest {
+
+    @Mock private PromotionRepository promotionRepository;
+
+    @InjectMocks private PromotionService promotionService;
+
+    @BeforeEach
+    void setUp() {
+        MockitoAnnotations.openMocks(this);
+    }
+
+    @Test
+    void testGetAll() {
+        // Arrange
+        Promotion promotion1 = new Promotion();
+        Promotion promotion2 = new Promotion();
+        when(promotionRepository.findAll()).thenReturn(Arrays.asList(promotion1, promotion2));
+
+        // Act
+        List<PromotionResponse> promotionResponses = promotionService.getAll();
+
+        // Assert
+        assertEquals(2, promotionResponses.size());
+    }
+
+    @Test
+    void testGetPromotionByCode_ExistingCode_ShouldReturnPromotionResponse() {
+        // Arrange
+        String code = "BUY2GET1FREE";
+        Promotion promotion = new Promotion();
+        promotion.setCode(code);
+        when(promotionRepository.findByCode(code)).thenReturn(Optional.of(promotion));
+
+        // Act
+        PromotionResponse promotionResponse = promotionService.getPromotionByCode(code);
+
+        // Assert
+        assertNotNull(promotionResponse);
+        assertEquals(code, promotionResponse.code());
+    }
+
+    @Test
+    void testGetPromotionByCode_NonExistingCode_ShouldThrowNotFoundException() {
+        // Arrange
+        String code = "NON-EXISTING-CODE";
+        when(promotionRepository.findByCode(code)).thenReturn(Optional.empty());
+
+        // Act & Assert
+        assertThrows(NotFoundException.class, () -> promotionService.getPromotionByCode(code));
+    }
+}