feat: se agregan dos funciones que se van a usar en la api

pom.xml

@@ -25,6 +25,12 @@
             <version>2.8.9</version> <!-- O la versión más reciente -->
         </dependency>
 
+        <dependency>
+            <groupId>info.debatty</groupId>
+            <artifactId>java-string-similarity</artifactId>
+            <version>RELEASE</version>
+        </dependency>
+
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-stdlib</artifactId>

readme.md

@@ -21,7 +21,7 @@ Agregar la dependencia:
 ```xml
 <dependency>
     <groupId>com.github.unq-ui</groupId>
-    <artifactId>??</artifactId>
+    <artifactId>mercadolibre-model</artifactId>
     <version>??</version>
 </dependency>
 ```
@@ -85,6 +85,14 @@ class MercadoLibreService {
      */
     fun getAllCategories(): List<Category>
 
+    /**
+     * Retrieves a category by ID.
+     * @param id The category's ID.
+     * @return The category.
+     * @throws CategoryException if the category is not found.
+     */
+    fun getCategory(id: String): Category
+
     /**
      * Adds a new product.
      * @param userId The user's ID.
@@ -114,6 +122,14 @@ class MercadoLibreService {
      */
     fun getProduct(id: String): Product
 
+    /**
+     * Retrieves related products to a product.
+     * @param idProduct The product's ID.
+     * @return The list of related products (max 10 products).
+     * @throws ProductException if the product is not found.
+    */
+    fun getRelatedProducts(idProduct: String): List<Product>
+
     /**
      * Retrieves products by user ID with pagination.
      * @param idUser The user's ID.

src/main/kotlin/service/MercadoLibreService.kt

@@ -4,6 +4,7 @@ import model.*
 import utilities.Page
 import utilities.getPage
 import java.time.LocalDateTime
+import info.debatty.java.stringsimilarity.*;
 
 class MercadoLibreService {
     private val idGenerator = IdGenerator()
@@ -96,6 +97,16 @@ class MercadoLibreService {
      */
     fun getAllCategories(): List<Category> = categories
 
+    /**
+     * Retrieves a category by ID.
+     * @param id The category's ID.
+     * @return The category.
+     * @throws CategoryException if the category is not found.
+     */
+    fun getCategory(id: String): Category {
+        return categories.find { it.id == id } ?: throw CategoryException("Not found")
+    }
+
     /**
      * Adds a new product.
      * @param userId The user's ID.
@@ -158,6 +169,20 @@ class MercadoLibreService {
         return products.find { it.id == id } ?: throw ProductException("Not found")
     }
 
+    /**
+     * Retrieves related products to a product.
+     * @param idProduct The product's ID.
+     * @return The list of related products (max 10 products).
+     * @throws ProductException if the product is not found.
+    */
+    fun getRelatedProducts(idProduct: String): List<Product> {
+        val product = getProduct(idProduct)
+        val relatedProducts = products.filter {
+            Levenshtein().distance(it.title, product.title) < 3 && it.id != product.id
+        }
+        return relatedProducts.take(10)
+    }
+
     /**
      * Retrieves products by user ID with pagination.
      * @param idUser The user's ID.

src/test/kotlin/service/MercadoLibreServiceTest.kt

@@ -1,5 +1,6 @@
 package service
 
+import data.initSystem
 import model.*
 import java.time.LocalDateTime
 import kotlin.test.*
@@ -136,6 +137,21 @@ class MercadoLibreServiceTest {
         assertEquals(mercadoLibreService.getAllCategories().size, 1)
     }
 
+    @Test
+    fun getCategoryTest() {
+        val mercadoLibreService = MercadoLibreService()
+        val category = mercadoLibreService.addCategory("cat1")
+        assertEquals(mercadoLibreService.getCategory("c_1"), category)
+    }
+
+    @Test
+    fun getCategoryWrongIdTest() {
+        val mercadoLibreService = MercadoLibreService()
+        assertFailsWith<CategoryException> {
+            mercadoLibreService.getCategory("c_1")
+        }
+    }
+
     @Test
     fun addProductTest() {
         val mercadoLibreService = MercadoLibreService()
@@ -429,4 +445,10 @@ class MercadoLibreServiceTest {
             mercadoLibreService.addAnswer(user2.id, p1.id, "q_1", "answer")
         }
     }
+
+    @Test
+    fun getRelatedProductsTest() {
+        val mercadoLibreService = initSystem()
+        assertEquals(mercadoLibreService.getRelatedProducts("p_90").size, 10)
+    }
 }