feat(vault): keep track of contestants

src/challenge/c1.rs

@@ -4,11 +4,11 @@
 //! establish a TCP connection to the server to receive the secret.
 
 use async_trait::async_trait;
-use libpt::log::{info, warn};
+use libpt::log::warn;
 use tokio::io::AsyncWriteExt;
 use tokio::net::TcpListener;
 
-use super::Challenge;
+use super::{Challenge, Descriptions};
 use crate::config::Config;
 use crate::has_won;
 use crate::vault::VaultRef;
@@ -28,20 +28,19 @@ impl Challenge for C1 {
         self.vault.clone()
     }
     fn new(config: Config, vault: VaultRef) -> Self {
-        info!("Solution: {}", Self::solution());
         Self { config, vault }
     }
 
-    fn hints() -> Vec<String> {
-        vec![String::from("TCP connect to 1337.")]
+    fn text() -> Descriptions {
+        Descriptions {
+            title: "dumb TCP".to_string(),
+            hints: vec![String::from("TCP connect to 1337.")],
+            solution: String::from("Connect by TCP, then the secret will be sent to you."),
+            description: String::from("Do you know how to TCP?"),
+        }
     }
 
-    fn solution() -> String {
-        String::from("Connect by TCP, then the secret will be sent to you.")
-    }
-
-    async fn serve(self) -> anyhow::Result<()> {
-        info!("serving challenge 1");
+    async fn serve(&self) -> anyhow::Result<()> {
         let listener = TcpListener::bind(self.config.addr).await?;
 
         loop {
@@ -53,7 +52,8 @@ impl Challenge for C1 {
                     continue;
                 }
             };
-            has_won(&addr);
+            self.vault.add_contestant(addr.into()).await;
+            has_won(&addr, &self.vault, &addr.into()).await;
             tokio::spawn(async move {
                 if let Err(e) = stream.write_all(vault.secret().as_bytes()).await {
                     warn!("could not write to peer {addr}: {e}");

src/challenge/c2.rs

@@ -10,7 +10,7 @@ use libpt::log::{info, warn};
 use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::net::{TcpListener, TcpStream};
 
-use super::Challenge;
+use super::{Challenge, Descriptions};
 use crate::config::Config;
 use crate::has_won;
 use crate::vault::VaultRef;
@@ -32,7 +32,7 @@ impl C2 {
         stream: &mut TcpStream,
         addr: &std::net::SocketAddr,
     ) -> Result<()> {
-        has_won(addr);
+        has_won(addr, vault, &addr.into()).await;
         if let Err(e) = stream.write_all(vault.secret().as_bytes()).await {
             warn!("could not write to peer {addr}: {e}");
             return Err(e.into());
@@ -54,22 +54,20 @@ impl Challenge for C2 {
         self.vault.clone()
     }
     fn new(config: Config, vault: VaultRef) -> Self {
-        info!("Solution: {}", Self::solution());
         Self { config, vault }
     }
-
-    fn hints() -> Vec<String> {
-        vec![String::from(
+    fn text() -> Descriptions {
+        Descriptions {
+            title: "TCP dialogue".to_string(),
+            hints: vec![String::from(
                 "TCP connect to 1337 and give me a special u16",
-        )]
+            )],
+            solution: String::from("Connect by TCP, send 1337 as bytes (not text)."),
+            description: String::from("Do you know how to TCP, but slightly cooler than for C1?"),
+        }
     }
 
-    fn solution() -> String {
-        String::from("Connect by TCP, send 1337 as bytes (not text).")
-    }
-
-    async fn serve(self) -> anyhow::Result<()> {
-        info!("serving challenge 2");
+    async fn serve(&self) -> anyhow::Result<()> {
         let listener = TcpListener::bind(self.config.addr).await?;
 
         loop {
@@ -81,7 +79,7 @@ impl Challenge for C2 {
                     continue;
                 }
             };
-            info!("new peer: {addr}");
+            self.vault.add_contestant(addr.into()).await;
             tokio::spawn(async move {
                 let mut buf: u16;
                 loop {

src/challenge/c3.rs

@@ -29,7 +29,7 @@ use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
 use tokio::net::{TcpListener, TcpStream};
 use tokio::time::Instant;
 
-use super::Challenge;
+use super::{Challenge, Descriptions};
 use crate::config::Config;
 use crate::has_won;
 use crate::vault::VaultRef;
@@ -189,7 +189,7 @@ impl C3 {
         stream: &mut TcpStream,
         addr: &std::net::SocketAddr,
     ) -> Result<()> {
-        has_won(addr);
+        has_won(addr, vault, &addr.into()).await;
         if let Err(e) = stream
             .write_all(("You win: ".to_owned() + vault.secret()).as_bytes())
             .await
@@ -214,23 +214,22 @@ impl Challenge for C3 {
         self.vault.clone()
     }
     fn new(config: Config, vault: VaultRef) -> Self {
-        info!("Solution: {}", Self::solution());
         Self { config, vault }
     }
-
-    fn hints() -> Vec<String> {
-        vec![
-            "TCP connect to 1337 and answer the questions".to_string(),
-            "The questions keep chaning".to_string(),
-            "You should try to solve the questions in an automated way".to_string(),
-        ]
+    fn text() -> Descriptions {
+        Descriptions {
+            title: "TCP math exam".to_string(),
+            hints: vec![
+                "TCP connect to 1337 and answer the questions.".to_string(),
+                "The questions keep chaning.".to_string(),
+                "You should try to solve the questions in an automated way.".to_string(),
+            ],
+            solution: String::from("Connect by TCP, programmatically answer the questions."),
+            description: String::from("How fast can you do arithmetics?"),
+        }
     }
 
-    fn solution() -> String {
-        String::from("Connect by TCP, send 1337 as bytes (not text).")
-    }
-
-    async fn serve(self) -> anyhow::Result<()> {
+    async fn serve(&self) -> anyhow::Result<()> {
         info!("serving challenge 3");
         let listener = TcpListener::bind(self.config.addr).await?;
 
@@ -243,7 +242,7 @@ impl Challenge for C3 {
                     continue;
                 }
             };
-            info!("new peer: {}", peer.1);
+            self.vault.add_contestant(peer.1.into()).await;
             tokio::spawn(async move {
                 if let Err(e) = Self::handler(peer, &vault).await {
                     warn!("error while handling peer: {e}");

src/challenge/mod.rs

@@ -16,6 +16,60 @@ pub mod c1;
 pub mod c2;
 pub mod c3;
 
+#[derive(Clone, PartialEq, Eq, Hash, Debug)]
+pub struct Descriptions {
+    title: String,
+    hints: Vec<String>,
+    solution: String,
+    description: String,
+}
+
+impl Descriptions {
+    /// Returns a list of hints for the challenge.
+    ///
+    /// A hint is a short text to be given to the contestants in case the admin thinks they need
+    /// it. The first hint is the most vague, afterwards the hints become more and more helpful.
+    ///
+    /// # Returns
+    ///
+    /// A vector of strings containing hints for the challenge.
+    fn hints(&self) -> Vec<&str> {
+        self.hints.iter().map(|a| a.as_ref()).collect()
+    }
+    /// Returns the solution to the challenge.
+    ///
+    /// A solution is a short description of what has to be done to solve the challenge and get the
+    /// secret of the vault.
+    ///
+    /// # Returns
+    ///
+    /// A string containing the solution to the challenge.
+    fn solution(&self) -> &str {
+        &self.solution
+    }
+    /// Returns the description to the challenge.
+    ///
+    /// The description is usually a short introduction to the challenge, without giving anything
+    /// of the solution away.
+    ///
+    /// # Returns
+    ///
+    /// A string containing the description to the challenge.
+    fn description(&self) -> &str {
+        &self.description
+    }
+    /// Returns the title to the challenge.
+    ///
+    /// The title is just a short name, usually consisting of one to 5 words.
+    ///
+    /// # Returns
+    ///
+    /// A string containing the title to the challenge.
+    fn title(&self) -> &str {
+        &self.title
+    }
+}
+
 /// Defines the behavior of a challenge.
 ///
 /// Any type that implements this trait can be served as a challenge in the Wooly Vault application.
@@ -28,6 +82,8 @@ where
     fn vault(&self) -> VaultRef;
     /// Getter for the [Config].
     fn config(&self) -> Config;
+    /// Get the various texts for this challenge.
+    fn text() -> Descriptions;
     /// Creates a new instance of the challenge with the given configuration and vault.
     ///
     /// # Arguments
@@ -39,24 +95,6 @@ where
     ///
     /// A new instance of the challenge.
     fn new(config: Config, vault: VaultRef) -> Self;
-    /// Returns a list of hints for the challenge.
-    ///
-    /// A hint is a short text to be given to the contestants in case the admin thinks they need
-    /// it. The first hint is the most vague, afterwards the hints become more and more helpful.
-    ///
-    /// # Returns
-    ///
-    /// A vector of strings containing hints for the challenge.
-    fn hints() -> Vec<String>;
-    /// Returns the solution to the challenge.
-    ///
-    /// A solution is a short description of what has to be done to solve the challenge and get the
-    /// secret of the vault.
-    ///
-    /// # Returns
-    ///
-    /// A string containing the solution to the challenge.
-    fn solution() -> String;
     /// Starts the challenge and serves it to the contestants.
     ///
     /// This method is asynchronous and returns a result indicating whether the challenge was
@@ -69,7 +107,7 @@ where
     /// # Errors
     ///
     /// Will error when the challenge errors, for example when the network adress cannot be bound.
-    async fn serve(self) -> anyhow::Result<()>;
+    async fn serve(&self) -> anyhow::Result<()>;
     /// Serves a challenge and sets up the hint and monitoring service for the admin.
     ///
     /// This method not only serves the challenge, but it also sets up a small webservice for the
@@ -78,8 +116,8 @@ where
     /// The admin interface will only be served when [Config::addr_admin] is set by the user.
     ///
     /// Challenges should not typically implement this themselves, if they want to customize the
-    /// admin interface, define [admin_interface](Self::adming_interface).
-    /// The hadmin interface is not part of the challenge and just for monitoring.
+    /// admin interface, define [admin_interface](Self::admin_interface).
+    /// The admin interface is not part of the challenge and just for monitoring.
     ///
     /// # Returns
     ///
@@ -89,15 +127,19 @@ where
         if self.config().addr_admin.is_some() {
             let vault = self.vault();
             let config = self.config();
-            tokio::spawn(Self::admin_interface(vault, config));
+            tokio::spawn(Self::admin_interface(Self::text(), vault, config));
         }
 
         let challenge_handle = self.serve();
         Ok(challenge_handle.await?)
     }
     #[cfg(feature = "admin-interface")]
-    async fn admin_interface(vault: VaultRef, config: Config) -> anyhow::Result<()> {
-        admin::serve(vault, config).await?;
+    async fn admin_interface(
+        text: Descriptions,
+        vault: VaultRef,
+        config: Config,
+    ) -> anyhow::Result<()> {
+        admin::serve(text, vault, config).await?;
         Ok(())
     }
 }

src/lib.rs

@@ -14,11 +14,18 @@
 //! Wooly Vault is programmed asynchronously with [tokio] to be able to handle many contestants at
 //! once if needed.
 
+use self::vault::VaultRef;
+
 pub mod challenge;
 pub mod config;
 pub mod vault;
 
 #[inline]
-pub(crate) fn has_won(addr: &std::net::SocketAddr) {
+pub(crate) async fn has_won(
+    addr: &std::net::SocketAddr,
+    vault: &VaultRef,
+    contestant: &vault::Contestant,
+) {
+    vault.add_winner(contestant.clone()).await;
     libpt::log::info!("Sending the secret to {addr}")
 }

src/vault.rs

@@ -3,20 +3,57 @@
 //! This module provides a [`Vault`] struct that holds a secret and allows it to be shared safely
 //! across the application using an [`Arc`] (Atomic Reference Counted) pointer.
 
+use std::collections::HashSet;
+use std::fmt::{Debug, Display};
+use std::net::{IpAddr, SocketAddr};
 use std::sync::Arc;
 
+use libpt::log::info;
+use tokio::sync::Mutex;
+
 /// A type alias for an [`Arc`] pointer to a [`Vault`] instance.
 ///
 /// This type is used to share a [`Vault`] instance across multiple parts of the application.
 pub type VaultRef = Arc<Vault>;
 
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Contestant {
+    ip: IpAddr,
+}
+
 /// A struct that holds a secret and provides methods for accessing it.
 ///
 /// The [`Vault`] struct is designed to be shared safely across the application using an [`Arc`] pointer.
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone)]
 pub struct Vault {
     /// The secret stored in the vault
     secret: String,
+    contestants: Arc<Mutex<HashSet<Contestant>>>,
+    winners: Arc<Mutex<HashSet<Contestant>>>,
+}
+
+impl From<IpAddr> for Contestant {
+    fn from(value: IpAddr) -> Self {
+        Self { ip: value }
+    }
+}
+
+impl From<SocketAddr> for Contestant {
+    fn from(value: SocketAddr) -> Self {
+        Self { ip: value.ip() }
+    }
+}
+
+impl From<&SocketAddr> for Contestant {
+    fn from(value: &SocketAddr) -> Self {
+        Self { ip: value.ip() }
+    }
+}
+
+impl Display for Contestant {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{self:?}")
+    }
 }
 
 impl Vault {
@@ -30,6 +67,8 @@ impl Vault {
     pub fn new(secret: &str) -> VaultRef {
         let v = Self {
             secret: secret.to_string(),
+            contestants: Default::default(),
+            winners: Default::default(),
         };
         Arc::new(v)
     }
@@ -42,4 +81,22 @@ impl Vault {
     pub fn secret(&self) -> &str {
         &self.secret
     }
+
+    pub async fn add_contestant(&self, contestant: Contestant) -> bool {
+        info!("new contestant: {contestant}");
+        self.contestants.lock().await.insert(contestant)
+    }
+
+    pub async fn add_winner(&self, contestant: Contestant) -> bool {
+        info!("new winner: {contestant}");
+        self.winners.lock().await.insert(contestant)
+    }
+
+    pub async fn contestants(&self) -> HashSet<Contestant> {
+        self.contestants.lock().await.clone()
+    }
+
+    pub async fn winners(&self) -> HashSet<Contestant> {
+        self.contestants.lock().await.clone()
+    }
 }