Add design pattern

add some comments

README.md

@@ -1,13 +1,26 @@
 # syncaud
 
+## Requirements
+
+- [At least one custom exception class that extends Exception should be written.](./src/client_handler.rs#L6) (The struct `BindError` is a custom exception, which defines the error type for binding errors.)
+- [At least one inheritance implementation must be included.](./src/client_handler.rs#L37) (The `NetworkListener` implements the `ClientHandler` and `Listener` trait.)
+- [At least one custom (non-Spring Boot interface) interface should be created and used.](./src/client_handler.rs#14) (The `ClientHandler` trait is like an interface in Rust.)
+
+## Design Pattern
+
+In our code we adhered to the Strategy Design Pattern as described [here](https://rust-unofficial.github.io/patterns/patterns/behavioural/strategy.html). For example, the ClientHandler trait acts as the strategy interface and the NetworkListener implements the strategy via the trait. This means that in the future, this strategy could be replaced to allow for a different communication medium, e.g. Serial.
+
 ## Featurelist
+
 - The user interface should be interactive and usable by any person.
 - Sounds are played synchronously across multiple devices.
 - Any mp3 file can be uploaded by the user to play.
 
 ## Planned structure
+
 ![syncaud(1)](https://github.com/user-attachments/assets/264a3af8-717f-43ed-9c51-2d1da54b8c8a)
 
-
 ## Actual structure
-!![Syncaud](https://github.com/user-attachments/assets/97cc57de-a53d-48e3-b09e-8057bba05bac)
+
+![Syncaud(2)](https://github.com/user-attachments/assets/0b610dec-5589-40e5-82c3-34384649bd61)
+

src/client_handler.rs

@@ -41,11 +41,10 @@ impl Listener for NetworkListener {
     fn listen(port: u16) -> Result<()> {
         // Create the bind address string
         let bind_addr = format!("0.0.0.0:{}", port);
-
         // Attempt to bind the UDP socket to the address
         let socket = UdpSocket::bind(bind_addr);
         let socket = match socket {
-            Ok(s) => s,
+            Ok(s) => s, // If successful, use the socket
             Err(e) => {
                 // If there's an error, return a BindError
                 return Err(BindError {
@@ -61,19 +60,14 @@ impl Listener for NetworkListener {
         loop {
             // Buffer to store incoming data
             let mut data = [0; 1_048_576];
-
             // Receive data from the socket
             let (amt, src) = socket.recv_from(&mut data).expect("Didn't receive data");
-
             // Print the amount of data received and the source address
             println!("Received {} bytes from {}", amt, src);
-
             // Slice the buffer to the actual amount of data received
             let data = &mut data[..amt];
-
             // Deserialize the data into a Message
             let msg = bincode::deserialize::<Message>(data).expect("Failed to deserialize");
-
             // Handle the deserialized message
             NetworkListener::handle_message(msg);
         }

src/dispatcher.rs

@@ -20,10 +20,8 @@ pub struct NetworkDispatcher;
 impl NetworkDispatcher {
     // Load a sound file and return a Decoder
     fn load_sound(path: String) -> Decoder<BufReader<File>> {
-        // Open the file
-        let file = BufReader::new(File::open(path).unwrap());
-        // Decode the file
-        Decoder::new(file).unwrap()
+        let file = BufReader::new(File::open(path).unwrap()); // Open the file
+        Decoder::new(file).unwrap() // Decode the file
     }
 }
 
@@ -41,28 +39,23 @@ impl Dispatcher for NetworkDispatcher {
         let channels = source.channels();
         let sample_rate = source.sample_rate();
         let duration = source.total_duration().unwrap();
-        // Length of each chunk to send
-        let chunk_len = Duration::from_millis(200);
+        let chunk_len = Duration::from_millis(200); // Length of each chunk to send
 
-        // Initial offset
-        let mut offset = Duration::from_secs(0);
+        let mut offset = Duration::from_secs(0); // Initial offset
 
         // Iterate over each address
         for addr in addrs {
-            // Skip empty addresses
             if addr.is_empty() {
-                continue;
+                continue; // Skip empty addresses
             }
 
-            // Clone the source for each thread
-            let source = source.clone();
+            let source = source.clone(); // Clone the source for each thread
 
             // Spawn a new thread for each address
             thread::spawn(move || {
                 // Bind to a local UDP socket
                 let sock = UdpSocket::bind("0.0.0.0:0").expect("Failed to bind");
-                // Connect to the address
-                sock.connect(addr.clone()).expect("Failed to connect");
+                sock.connect(addr.clone()).expect("Failed to connect"); // Connect to the address
 
                 // Loop until the entire duration is covered
                 while offset < duration {
@@ -73,13 +66,11 @@ impl Dispatcher for NetworkDispatcher {
                         .take_duration(chunk_len)
                         .collect::<Vec<i16>>();
 
-                    // Update the offset
-                    offset += chunk_len;
+                    offset += chunk_len; // Update the offset
 
                     // Create a PlaySound message
                     let msg = Message::PlaySound(PlaySound {
-                        // Timestamp for synchronization
-                        timestamp: (now + offset).as_micros(),
+                        timestamp: (now + offset).as_micros(), // Timestamp for synchronization
                         channels: channels,
                         sample_rate: sample_rate,
                         sound_data: sound_data,

src/main.rs

@@ -1,5 +1,4 @@
-#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
-// Hide console window on Windows in release mode
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // Hide console window on Windows in release mode
 
 // Import necessary modules and crates
 use client_handler::{Listener, NetworkListener};
@@ -19,8 +18,7 @@ mod ui_app;
 fn main() -> eframe::Result {
     // Define options for the eframe application
     let options = eframe::NativeOptions {
-        // Set initial window size
-        viewport: egui::ViewportBuilder::default().with_inner_size([700.0, 400.0]),
+        viewport: egui::ViewportBuilder::default().with_inner_size([700.0, 400.0]), // Set initial window size
         ..Default::default()
     };
 
@@ -31,15 +29,13 @@ fn main() -> eframe::Result {
         match result {
             Ok(_) => {}
             Err(e) => {
-                // Print error message if binding fails
-                eprintln!("Failed to bind: {}", e.message);
-                // Try with port 3001 if port 3000 fails
+                eprintln!("Failed to bind: {}", e.message); // Print error message if binding fails
+                                                            // Try with port 3001 if port 3000 fails
                 let result = NetworkListener::listen(3001);
                 match result {
                     Ok(_) => {}
                     Err(e) => {
-                        // Print error message if binding fails again
-                        eprintln!("Failed to bind again: {}", e.message);
+                        eprintln!("Failed to bind again: {}", e.message); // Print error message if binding fails again
                     }
                 }
             }
@@ -48,17 +44,13 @@ fn main() -> eframe::Result {
 
     // Run the eframe application
     eframe::run_native(
-        // Application title
-        "My egui App",
-        // Application options
-        options,
+        "My egui App", // Application title
+        options,       // Application options
         Box::new(|cc| {
             // This gives us image support:
-            // Install image loaders for egui context
-            egui_extras::install_image_loaders(&cc.egui_ctx);
+            egui_extras::install_image_loaders(&cc.egui_ctx); // Install image loaders for egui context
 
-            // Initialize the UI application
-            Ok(Box::<UIApp>::default())
+            Ok(Box::<UIApp>::default()) // Initialize the UI application
         }),
     )
 }

src/protocol.rs

@@ -1,25 +1,16 @@
-use serde::{Deserialize, Serialize};
-
-// Importing necessary traits from serde for serialization and deserialization
+use serde::{Deserialize, Serialize}; // Importing necessary traits from serde for serialization and deserialization
 
 // Define an enum called Message which can hold different types of messages
-#[derive(Serialize, Deserialize, Debug)]
-// Automatically generate code for serialization, deserialization, and debugging
+#[derive(Serialize, Deserialize, Debug)] // Automatically generate code for serialization, deserialization, and debugging
 pub enum Message {
-    PlaySound(PlaySound),
-    // A variant of the Message enum that holds a PlaySound struct
+    PlaySound(PlaySound), // A variant of the Message enum that holds a PlaySound struct
 }
 
 // Define a struct called PlaySound which represents a sound to be played
-#[derive(Serialize, Deserialize, Debug)]
-// Automatically generate code for serialization, deserialization, and debugging
+#[derive(Serialize, Deserialize, Debug)] // Automatically generate code for serialization, deserialization, and debugging
 pub struct PlaySound {
-    pub timestamp: u128,
-    // The timestamp when the sound should be played
-    pub channels: u16,
-    // The number of audio channels (e.g., 2 for stereo)
-    pub sample_rate: u32,
-    // The sample rate of the audio (e.g., 44100 for 44.1 kHz)
-    pub sound_data: Vec<i16>,
-    // The actual sound data as a vector of 16-bit integers
+    pub timestamp: u128,      // The timestamp when the sound should be played
+    pub channels: u16,        // The number of audio channels (e.g., 2 for stereo)
+    pub sample_rate: u32,     // The sample rate of the audio (e.g., 44100 for 44.1 kHz)
+    pub sound_data: Vec<i16>, // The actual sound data as a vector of 16-bit integers
 }

src/ui_app.rs

@@ -77,7 +77,11 @@ impl eframe::App for UIApp {
             }
 
             // Displaying the picked file path
-            ui.label(format!("Picked file: {:?}", self.picked_file));
+            let picked_file_label = match &self.picked_file {
+                Some(path) => format!("Picked file: {:?}", path),
+                None => "No file picked".to_owned(),
+            };
+            ui.label(picked_file_label);
 
             ui.add_space(25.0); // Adding space in the UI
             ui.separator(); // Adding a separator line