detailView methods findAll and findId with a test for findAll

client/src/main/java/client/DetailView.java

@@ -0,0 +1,58 @@
+package client;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import commons.Recipe;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.List;
+
+public class DetailView {
+    private final String BASE_URL = "http://localhost:8080/api";
+    private final HttpClient client;
+    private final ObjectMapper objectMapper = new ObjectMapper();
+
+    public DetailView() {
+        client = HttpClient.newHttpClient();
+    }
+
+
+    /**
+     * Gets all the recipes from the backend
+     * @return a JSON string with all the recipes
+
+     */
+    public List<Recipe> findAll() throws IOException, InterruptedException {
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(BASE_URL+ "/recipes"))
+                .GET()
+                .build();
+        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+
+        List<Recipe> recipes = objectMapper.readValue(response.body(), new TypeReference<List<Recipe>>() {
+        }); // JSON string-> List<Recipe> (Jackson)
+        return recipes;
+    }
+
+
+    /**
+     * Gets a single recipe based on its id
+     * @param id every recipe has it's unique id
+     * @return a singe recipe with the given id
+     */
+    public Recipe findId(int id) throws IOException, InterruptedException {
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(BASE_URL+"/" + id))
+                .GET()
+                .build();
+        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+
+        Recipe recipe = objectMapper.readValue(response.body(),Recipe.class);
+        return recipe;
+    }
+}