add a --dev mode

src/config.rs

@@ -26,6 +26,7 @@ pub struct ProviderConfig {
 #[derive(Serialize, Deserialize, Debug, Clone)]
 #[serde(tag = "user_driver")]
 pub enum UserManagement {
+    Demo,
     Static(LoginStaticConfig),
     Ldap(LoginLdapConfig),
 }

src/login/demo_provider.rs

@@ -0,0 +1,48 @@
+use crate::login::*;
+use crate::storage::*;
+
+pub struct DemoLoginProvider{
+    keys: CryptoKeys,
+    in_memory_store: in_memory::MemDb,
+}
+
+impl DemoLoginProvider {
+    pub fn new() -> Self {
+        Self { 
+            keys: CryptoKeys::init(),
+            in_memory_store: in_memory::MemDb::new(),
+        }
+    }
+}
+
+#[async_trait]
+impl LoginProvider for DemoLoginProvider {
+    async fn login(&self, username: &str, password: &str) -> Result<Credentials> {
+        tracing::debug!(user=%username, "login");
+
+        if username != "alice" {
+            bail!("user does not exist");
+        }
+
+        if password != "hunter2" {
+            bail!("wrong password");
+        } 
+        
+        let storage = self.in_memory_store.builder("alice").await;
+        let keys = self.keys.clone();
+
+        Ok(Credentials { storage, keys })
+    }
+
+    async fn public_login(&self, email: &str) -> Result<PublicCredentials> {
+        tracing::debug!(user=%email, "public_login");
+        if email != "alice@example.tld" {
+            bail!("invalid email address");
+        }
+
+        let storage = self.in_memory_store.builder("alice").await;
+        let public_key = self.keys.public.clone();
+
+        Ok(PublicCredentials { storage, public_key })
+    }
+}

src/login/mod.rs

@@ -1,5 +1,6 @@
 pub mod ldap_provider;
 pub mod static_provider;
+pub mod demo_provider;
 
 use base64::Engine;
 use std::sync::Arc;

src/main.rs

@@ -29,7 +29,12 @@ struct Args {
     #[clap(subcommand)]
     command: Command,
 
+    /// A special mode dedicated to developers, NOT INTENDED FOR PRODUCTION
+    #[clap(long)]
+    dev: bool,
+
     #[clap(short, long, env = "CONFIG_FILE", default_value = "aerogramme.toml")]
+    /// Path to the main Aerogramme configuration file
     config_file: PathBuf,
 }
 
@@ -158,7 +163,22 @@ async fn main() -> Result<()> {
     tracing_subscriber::fmt::init();
 
     let args = Args::parse();
-    let any_config = read_config(args.config_file)?;
+    let any_config = if args.dev {
+        use std::net::*;
+        AnyConfig::Provider(ProviderConfig {
+            pid: None,
+            imap: ImapConfig {
+                bind_addr: SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)), 1143),
+            },
+            lmtp: LmtpConfig {
+                bind_addr: SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)), 1025),
+                hostname: "example.tld".to_string(),
+            },
+            users: UserManagement::Demo,
+        })
+    } else {
+        read_config(args.config_file)?
+    };
 
     match (&args.command, any_config) {
         (Command::Companion(subcommand), AnyConfig::Companion(config)) => match subcommand {
@@ -184,8 +204,8 @@ async fn main() -> Result<()> {
             ProviderCommand::Account(cmd) => {
                 let user_file = match config.users {
                     UserManagement::Static(conf) => conf.user_list,
-                    UserManagement::Ldap(_) => {
+                    _ => {
-                        panic!("LDAP account management is not supported from Aerogramme.")
+                        panic!("Only static account management is supported from Aerogramme.")
                     }
                 };
                 account_management(&args.command, cmd, user_file)?;

src/server.rs

@@ -11,7 +11,7 @@ use crate::config::*;
 use crate::imap;
 use crate::lmtp::*;
 use crate::login::ArcLoginProvider;
-use crate::login::{ldap_provider::*, static_provider::*};
+use crate::login::{ldap_provider::*, static_provider::*, demo_provider::*};
 
 pub struct Server {
     lmtp_server: Option<Arc<LmtpServer>>,
@@ -36,6 +36,7 @@ impl Server {
     pub async fn from_provider_config(config: ProviderConfig) -> Result<Self> {
         tracing::info!("Init as provider");
         let login: ArcLoginProvider = match config.users {
+            UserManagement::Demo => Arc::new(DemoLoginProvider::new()),
             UserManagement::Static(x) => Arc::new(StaticLoginProvider::new(x).await?),
             UserManagement::Ldap(x) => Arc::new(LdapLoginProvider::new(x)?),
         };