feat: adds implementation to lesson26.

lesson_26/api/java/api_app/build.gradle.kts

@@ -3,7 +3,7 @@ plugins {
     application
     eclipse
     id("com.diffplug.spotless") version "6.25.0"
-	  id("org.springframework.boot") version "3.4.0"
+    id("org.springframework.boot") version "3.2.3"
     id("com.adarshr.test-logger") version "4.0.0"
 }
 
@@ -21,7 +21,6 @@ dependencies {
     testImplementation("org.springframework.boot:spring-boot-starter-test")
     testImplementation("org.assertj:assertj-core:3.26.3")
     testImplementation("at.favre.lib:bcrypt:0.10.2")
-    testImplementation("org.springframework.boot:spring-boot-starter-test")
 
     // This dependency is used by the application.
     implementation("com.codedifferently.instructional:instructional-lib")

lesson_26/api/java/api_app/src/main/java/com/codedifferently/lesson26/web/MediaItemsController.java

@@ -4,16 +4,28 @@
 import com.codedifferently.lesson26.library.Library;
 import com.codedifferently.lesson26.library.MediaItem;
 import com.codedifferently.lesson26.library.search.SearchCriteria;
+import jakarta.validation.Valid;
 import java.io.IOException;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
+import java.util.UUID;
 import org.springframework.http.ResponseEntity;
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 @CrossOrigin
+@RequestMapping("/api")
 public class MediaItemsController {
 
   private final Library library;
@@ -31,4 +43,54 @@ public ResponseEntity<GetMediaItemsResponse> getItems() {
     var response = GetMediaItemsResponse.builder().items(responseItems).build();
     return ResponseEntity.ok(response);
   }
+
+  @GetMapping("/items/{id}")
+  public ResponseEntity<MediaItemResponse> getItemById(@PathVariable String id) {
+    try {
+      Set<MediaItem> items = library.search(SearchCriteria.builder().id(id).build());
+      if (items.isEmpty()) {
+        return ResponseEntity.notFound().build();
+      }
+      MediaItemResponse response = MediaItemResponse.from(items.iterator().next());
+      return ResponseEntity.ok(response);
+    } catch (IllegalArgumentException e) {
+      return ResponseEntity.notFound().build();
+    }
+  }
+
+  @PostMapping("/items")
+  public ResponseEntity<CreateMediaItemResponse> createItem(
+      @Valid @RequestBody CreateMediaItemRequest request) {
+    try {
+      MediaItem item = MediaItemRequest.asMediaItem(request.getItem());
+      library.addMediaItem(item, librarian);
+      var response = CreateMediaItemResponse.builder().item(MediaItemResponse.from(item)).build();
+      return ResponseEntity.ok(response);
+    } catch (IllegalArgumentException e) {
+      return ResponseEntity.badRequest().build();
+    }
+  }
+
+  @DeleteMapping("/items/{id}")
+  public ResponseEntity<Void> deleteItemById(@PathVariable String id) {
+    try {
+      UUID uuid = UUID.fromString(id);
+      Set<MediaItem> items = library.search(SearchCriteria.builder().id(id).build());
+      if (items.isEmpty()) {
+        return ResponseEntity.notFound().build();
+      }
+      library.removeMediaItem(uuid, librarian);
+      return ResponseEntity.noContent().build();
+    } catch (IllegalArgumentException e) {
+      return ResponseEntity.notFound().build();
+    }
+  }
+
+  @ExceptionHandler(MethodArgumentNotValidException.class)
+  public ResponseEntity<Map<String, List<String>>> handleValidationErrors(
+      MethodArgumentNotValidException ex) {
+    List<String> errors =
+        ex.getBindingResult().getFieldErrors().stream().map(FieldError::getDefaultMessage).toList();
+    return ResponseEntity.badRequest().body(Map.of("errors", errors));
+  }
 }

lesson_26/api/java/api_app/src/test/java/com/codedifferently/lesson26/web/MediaItemsControllerTest.java

@@ -37,7 +37,7 @@ static void setUp(WebApplicationContext wac) {
   @Test
   void testController_getsAllItems() throws Exception {
     mockMvc
-        .perform(get("/items").contentType(MediaType.APPLICATION_JSON))
+        .perform(get("/api/items").contentType(MediaType.APPLICATION_JSON))
         .andExpect(status().isOk())
         .andExpect(jsonPath("$.items").isArray())
         .andExpect(jsonPath("$.items.length()").value(31));
@@ -47,7 +47,7 @@ void testController_getsAllItems() throws Exception {
   void testController_getsAnItem() throws Exception {
     mockMvc
         .perform(
-            get("/items/31616162-3831-3832-2d34-3334352d3465")
+            get("/api/items/31616162-3831-3832-2d34-3334352d3465")
                 .contentType(MediaType.APPLICATION_JSON))
         .andExpect(status().isOk());
   }
@@ -56,7 +56,7 @@ void testController_getsAnItem() throws Exception {
   void testController_returnsNotFoundOnGetItem() throws Exception {
     mockMvc
         .perform(
-            get("/items/00000000-0000-0000-0000-000000000000")
+            get("/api/items/00000000-0000-0000-0000-000000000000")
                 .contentType(MediaType.APPLICATION_JSON))
         .andExpect(status().isNotFound());
   }
@@ -66,7 +66,7 @@ void testController_reportsBadRequestOnAddItem() throws Exception {
     String json = "{}";
 
     mockMvc
-        .perform(post("/items").contentType(MediaType.APPLICATION_JSON).content(json))
+        .perform(post("/api/items").contentType(MediaType.APPLICATION_JSON).content(json))
         .andExpect(status().isBadRequest())
         .andExpect(jsonPath("$.errors").isArray())
         .andExpect(jsonPath("$.errors.length()").value(1));
@@ -89,7 +89,7 @@ void testController_addsItem() throws Exception {
         """;
 
     mockMvc
-        .perform(post("/items").contentType(MediaType.APPLICATION_JSON).content(json))
+        .perform(post("/api/items").contentType(MediaType.APPLICATION_JSON).content(json))
         .andExpect(status().isOk())
         .andExpect(jsonPath("$.item.id").value("e27a4e0d-9664-420d-955e-c0e295d0ce02"));
 
@@ -105,7 +105,7 @@ void testController_addsItem() throws Exception {
   void testController_returnsNotFoundOnDeleteItem() throws Exception {
     mockMvc
         .perform(
-            delete("/items/00000000-0000-0000-0000-000000000000")
+            delete("/api/items/00000000-0000-0000-0000-000000000000")
                 .contentType(MediaType.APPLICATION_JSON))
         .andExpect(status().isNotFound());
   }
@@ -114,7 +114,7 @@ void testController_returnsNotFoundOnDeleteItem() throws Exception {
   void testController_deletesItem() throws Exception {
     mockMvc
         .perform(
-            delete("/items/32623932-6566-3364-2d62-3232342d3435")
+            delete("/api/items/32623932-6566-3364-2d62-3232342d3435")
                 .contentType(MediaType.APPLICATION_JSON))
         .andExpect(status().isNoContent());
 

lesson_26/api/java/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME