Implemented ConfigService load/save methods and tests

client/pom.xml

@@ -23,6 +23,12 @@
             <version>0.0.1-SNAPSHOT</version>
         </dependency>
 
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.20.1</version>
+        </dependency>
+
         <dependency>
             <groupId>org.glassfish.jersey.core</groupId>
             <artifactId>jersey-client</artifactId>

client/src/main/java/client/utils/Config.java

@@ -0,0 +1,51 @@
+package client.utils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Config {
+
+    /*
+    Sets parameters for what the config file needs with a config
+     Object that will be used in the ConfigService object
+     */
+    private String language = "en";
+    private String serverUrl = "http://localhost:8080";
+
+    private List<String> favourites = new ArrayList<>();
+    private List<String> shoppingList = new ArrayList<>();
+
+    public Config(){}
+
+    public String getLanguage() {
+        return language;
+    }
+
+    public List<String> getShoppingList() {
+        return shoppingList;
+    }
+
+    public List<String> getFavourites() {
+        return favourites;
+    }
+
+    public String getServerUrl() {
+        return serverUrl;
+    }
+
+    public void setLanguage(String language) {
+        this.language = language;
+    }
+
+    public void setServerUrl(String serverUrl) {
+        this.serverUrl = serverUrl;
+    }
+
+    public void setFavourites(List<String> favourites) {
+        this.favourites = favourites;
+    }
+
+    public void setShoppingList(List<String> shoppingList) {
+        this.shoppingList = shoppingList;
+    }
+}

client/src/main/java/client/utils/ConfigService.java

@@ -0,0 +1,84 @@
+package client.utils;
+
+
+import com.fasterxml.jackson.core.exc.StreamReadException;
+import com.fasterxml.jackson.databind.DatabindException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.nio.file.Path;
+import java.io.File;
+import java.io.IOException;
+
+public class ConfigService {
+    private final Path configPath;
+    private final ObjectMapper mapper = new ObjectMapper();
+    private Config config;
+
+
+    /*
+    Constructor that takes the path to the config file as it's parameter
+
+     */
+    public ConfigService(Path configPath){
+        this.configPath = configPath;
+        load();
+    }
+
+    /*
+    Load needs to be called to load any changes from the config file
+    to the config attribute of the configService class.
+    Takes no parameters
+     */
+    private void load(){
+        File file = configPath.toFile(); //reads the config file as file
+        if(file.exists()){
+            try{
+                config = mapper.readValue(file, Config.class); //uses Jackson to map the file to the config attribute
+
+            } catch (StreamReadException e) {
+                throw new RuntimeException(e);
+            } catch (DatabindException e) {
+                throw new RuntimeException(e);
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        else{
+            config = new Config(); // if file doesn't exist, it creates one
+        }
+    }
+
+    public Path getConfigPath() {
+        return configPath;
+    }
+
+    public ObjectMapper getMapper() {
+        return mapper;
+    }
+
+    public Config getConfig() {
+        return config;
+    }
+
+    public void setConfig(Config config) {
+        this.config = config;
+    }
+
+
+    /*
+    The save method saves any changes done to the file
+    from the config object
+     */
+    public void save(){
+
+        try {
+            File file = configPath.toFile(); // file is the config file here
+            mapper.writeValue(file, config); // here we edit the value of the file using config
+
+        }
+        catch (Exception e){
+            throw new RuntimeException(e);
+        }
+    }
+
+}

client/src/test/java/client/scenes/ConfigServiceTest.java

@@ -0,0 +1,81 @@
+package client.scenes;
+
+import client.utils.Config;
+import client.utils.ConfigService;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ConfigServiceTest {
+
+    /*
+    Tests if the config file loads properly with a prewritten json file
+     */
+    @Test
+    public void ConfigServiceFileLoadTest(@TempDir Path tempDir) throws IOException {
+        Path configPath = tempDir.resolve("config.json");
+
+        String json = """
+                {
+                  "language": "de",
+                  "serverUrl": "http://exmple12.com",
+                  "favourites": ["banana bread", "pineapple pie"],
+                  "shoppingList": ["milk", "butter"]
+                }
+                """;
+        Files.writeString(configPath, json); //writes into path
+        ConfigService configService = new ConfigService(configPath);//initiates configservice
+
+        Config config = configService.getConfig(); //checks
+
+        assertEquals("de", config.getLanguage());
+        assertEquals("http://exmple12.com", config.getServerUrl());
+
+        List<String> x = new ArrayList<>();
+        x.add("banana bread");
+        x.add("pineapple pie");
+
+        List<String> y = new ArrayList<>();
+        y.add("milk");
+        y.add("butter");
+
+        assertEquals(x , config.getFavourites());
+        assertEquals(y , config.getShoppingList());
+    }
+
+
+    /*
+    Tests if the save method saves changes to the config file.
+     */
+    @Test
+    public void ConfigSaveTest(@TempDir Path tempDir) throws IOException {
+        Path configPath = tempDir.resolve("config.json");
+        ConfigService configService = new ConfigService(configPath);
+
+        Config config = configService.getConfig();
+
+
+        config.setLanguage("fr");
+        config.setServerUrl("www.domain1.com");
+
+        configService.save();
+
+        String jsonTest = Files.readString(configPath);
+
+        assertTrue(jsonTest.contains("\"language\":\"fr\""));
+        assertTrue(jsonTest.contains("\"serverUrl\":\"www.domain1.com\""));
+
+
+    }
+
+
+
+}

client/src/test/java/client/scenes/ConfigTest.java

@@ -0,0 +1,37 @@
+package client.scenes;
+
+import client.utils.Config;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ConfigTest {
+
+    @Test
+    public void ConfigDefaultValueTest(){
+        Config config = new Config();
+        assertEquals("en", config.getLanguage());
+        assertEquals("http://localhost:8080", config.getServerUrl());
+        assertTrue(config.getFavourites().isEmpty());
+        assertTrue(config.getShoppingList().isEmpty());
+    }
+
+    @Test
+    public void ConfigGetterTest(){
+        Config config = new Config();
+        config.setLanguage("nl");
+        config.setServerUrl("http://localhost:8081");
+        ArrayList<String> x = new ArrayList<>();
+        x.add("Lava Cake");
+        x.add("Brownie");
+        config.setFavourites(x);
+        assertEquals(config.getFavourites(), x);
+        config.setShoppingList(x);
+        assertEquals(config.getShoppingList(), x);
+    }
+
+
+
+}