feat: better readme

.settings/org.eclipse.buildship.core.prefs

@@ -1,4 +1,4 @@
-arguments=--init-script /home/xeon0x/.var/app/dev.zed.Zed/data/zed/extensions/work/java/jdtls/jdt-language-server-1.46.0-202503271314/configuration/org.eclipse.osgi/58/0/.cp/gradle/init/init.gradle
+arguments=--init-script /home/xeon0x/.var/app/dev.zed.Zed/data/zed/extensions/work/java/jdtls/jdt-language-server-1.46.1-202504011455/configuration/org.eclipse.osgi/58/0/.cp/gradle/init/init.gradle
 auto.sync=false
 build.scans.enabled=false
 connection.gradle.distribution=GRADLE_DISTRIBUTION(WRAPPER)

README.md

@@ -1,5 +1,24 @@
 # ClientServer
 
+A Java-based ☕️↔️ UDP client-server chat 💬 system with automatic 🔄 text-to-emoji 😊 conversion using Mistral API.
+
+## Features
+
+### Available Commands
+
+- `/list` : Display connected clients list
+- `/msg <nickname> <message>` : Send private message to specific client
+- `/help` : Display help with all available commands
+- `/disconnect` : Clean server disconnection
+- `<message>` : Broadcast message translated to emojis to all connected clients
+
+### Technical Features
+
+- UDP Communication
+- Multi-threading for client handling
+- Mistral API for text-to-emoji conversion
+- Disconnection handling
+
 ## Build
 
 ```bash
@@ -11,33 +30,76 @@
 ### Client
 
 ```bash
-./gradlew run --args='client'
+./gradlew runClient
 ```
 
-or
-
-```bash
-./gradlew runServer
-```
+The client will ask for a pseudo, an IP (type `localhost` if server and clients are on the same machine), and a port (type `6666` by default).
 
 ### Server
 
-```bash
-./gradlew run --args='server'
-```
-
-or
-
 ```bash
 ./gradlew runServer
 ```
 
+## Configuration
+
+Create a `config.properties` file at project root (`ClientServer/app/config.properties`) with:
+
+```properties
+mistral.api.key=your_api_key
+```
+
+Replace `your_api_key` with your actual Mistral API key. Create one for free at https://console.mistral.ai/api-keys. If no API key is provided, the server will not be able to convert broadcasted messages to emojis and empty broadcasted messages will be sent.
+
 ## Documentation
 
+### Sequence Diagram
+
 ```mermaid
 sequenceDiagram
-    Note over Client, Serveur: DatagramSocket("localhost", 66666)
-    Client->>+Serveur: DatagramPacket("Salve !", 7, "localhost", 6666)
-    Note over Serveur, Client: DatagramSocket("localhost", 66666)
-    Serveur->>+Client: DatagramPacket("Accusé de réception", 19, "localhost", 6666)
+    participant MainServer
+
+    participant Alice
+    Note over Alice: Creates DatagramSocket
+    Alice->>+MainServer: Sends username "Alice"
+    Note over MainServer: Creates new socket<br/>for AliceHandler
+    create participant AliceHandler
+    MainServer->>AliceHandler: Create new handler thread
+    MainServer->>-Alice: PORT:{AlicePort}
+
+    participant Bob
+    Bob->>+MainServer: Sends username "Bob"
+    Note over MainServer: Creates new socket<br/>for BobHandler
+    create participant BobHandler
+    MainServer->>BobHandler: Create new handler thread
+    MainServer->>-Bob: PORT:{BobPort}
+
+    rect rgb(200, 200, 255)
+        Note over Alice,Bob: Chat loop
+        Alice->>+AliceHandler: "Hi everyone!"
+        Note over AliceHandler: Converts to emojis
+        AliceHandler->>+BobHandler: Broadcast message
+        BobHandler->>-Bob: "Alice: 👋👩‍👩🌍🎉"
+        AliceHandler->>-Alice: Message sent
+
+        Bob->>+BobHandler: "Hello Alice, how are you?"
+        Note over BobHandler: Converts to emojis
+        BobHandler->>+AliceHandler: Broadcast message
+        AliceHandler->>-Alice: "Bob: 👋🏻👩🏼‍🦰🐰🤔👩🏼‍🦰🐇💬👩🏼‍🦰🐰👍🏻😊👩🏼‍🦰🐇👋🏻"
+        BobHandler->>-Bob: Message sent
+    end
+
+    Alice->>+AliceHandler: /disconnect
+    Note over AliceHandler: Removes Alice<br/>from map
+    AliceHandler->>-Alice: Disconnection confirmation
+    AliceHandler->>MainServer: Thread terminated
+    MainServer-->>AliceHandler: destroy
+
+    Bob->>+BobHandler: /disconnect
+    Note over BobHandler: Removes Bob<br/>from map
+    BobHandler->>-Bob: Disconnection confirmation
+    BobHandler->>MainServer: Thread terminated
+    MainServer-->>BobHandler: destroy
+
+    Note over Alice,Bob: Close sockets
 ```

app/src/main/java/clientserver/common/MistralDirectAPI.java

@@ -10,10 +10,9 @@ import java.util.Properties;
 
 public class MistralDirectAPI {
 
-    public static void main(String[] args) {
-        String apiKey;
+    private static String apiKey;
 
-        // Load API key from properties file
+    static {
         try {
             Properties props = new Properties();
             FileInputStream input = new FileInputStream("config.properties");
@@ -22,18 +21,22 @@ public class MistralDirectAPI {
             input.close();
         } catch (IOException e) {
             System.err.println("Could not load API key: " + e.getMessage());
-            return;
         }
+    }
 
-        String payload =
+    public static String translateToEmojis(String message) {
+        String payload = String.format(
             """
             {
                 "model": "mistral-medium",
                 "messages": [
-                    { "role": "user", "content": "Reverse turing test." }
+                    { "role": "system", "content": "Please translate the following message to emojis only. Do not include any comments. End the emoji message with ;" },
+                    { "role": "user", "content": "%s" }
                 ]
             }
-            """;
+            """,
+            message
+        );
 
         HttpRequest request = HttpRequest.newBuilder()
             .uri(URI.create("https://api.mistral.ai/v1/chat/completions"))
@@ -49,10 +52,26 @@ public class MistralDirectAPI {
                 request,
                 HttpResponse.BodyHandlers.ofString()
             );
-            System.out.println("Response Code: " + response.statusCode());
-            System.out.println("Response Body: " + response.body());
+            String responseBody = response.body();
+            return extractContent(responseBody);
         } catch (IOException | InterruptedException e) {
             System.err.println("Error occurred: " + e.getMessage());
+            return message;
         }
     }
+
+    private static String extractContent(String jsonResponse) {
+        // Find the content field in the response
+        int contentIndex = jsonResponse.indexOf("\"content\":\"");
+        if (contentIndex != -1) {
+            int startIndex = contentIndex + "\"content\":\"".length();
+
+            int endIndex = jsonResponse.indexOf(";", startIndex);
+
+            if (endIndex != -1) {
+                return jsonResponse.substring(startIndex, endIndex);
+            }
+        }
+        return "";
+    }
 }

app/src/main/java/clientserver/server/MessageProcessor.java

@@ -1,6 +1,7 @@
 package clientserver.server;
 
 import clientserver.client.Client;
+import clientserver.common.MistralDirectAPI;
 import java.net.DatagramSocket;
 
 public class MessageProcessor {
@@ -42,6 +43,10 @@ public class MessageProcessor {
             case "/disconnect":
                 handleDisconnect();
                 break;
+            default:
+                // Broadcast message to all clients
+                broadcastMessageEmoji(message);
+                break;
         }
     }
 
@@ -95,6 +100,37 @@ public class MessageProcessor {
         );
     }
 
+    private void broadcastMessage(String message) {
+        String formattedMessage = "> " + client.getPseudo() + ": " + message;
+
+        for (ClientHandler handler : Server.getAllClientHandlers()) {
+            Client targetClient = handler.getClient();
+            Server.sendMessage(
+                clientHandlerSocket,
+                formattedMessage,
+                targetClient.getAddress(),
+                targetClient.getPort()
+            );
+        }
+    }
+
+    private void broadcastMessageEmoji(String message) {
+        // Translate message to emojis
+        String emojiMessage = MistralDirectAPI.translateToEmojis(message);
+        String formattedMessage =
+            "> " + client.getPseudo() + ": " + emojiMessage;
+
+        for (ClientHandler handler : Server.getAllClientHandlers()) {
+            Client targetClient = handler.getClient();
+            Server.sendMessage(
+                clientHandlerSocket,
+                formattedMessage,
+                targetClient.getAddress(),
+                targetClient.getPort()
+            );
+        }
+    }
+
     private void handleMsgCommand() {
         Server.sendMessage(
             clientHandlerSocket,

app/src/main/java/clientserver/server/Server.java

@@ -5,6 +5,7 @@ import java.io.IOException;
 import java.net.DatagramPacket;
 import java.net.DatagramSocket;
 import java.net.InetAddress;
+import java.util.Collection;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -179,6 +180,10 @@ public class Server {
         return mapPseudosConnectedClientsHandlers.get(pseudo);
     }
 
+    public static Collection<ClientHandler> getAllClientHandlers() {
+        return mapPseudosConnectedClientsHandlers.values();
+    }
+
     public void addConnectedClientHandler(
         String pseudo,
         ClientHandler clientHandler