Moved uploaded banner and generated styles to a persistent data directory. Fixes #9

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/config.rs

@@ -3,7 +3,7 @@ use std::fs::read_to_string;
 #[cfg(feature = "ssr")]
 use std::net::SocketAddr;
 #[cfg(feature = "ssr")]
-use std::path::Path;
+use std::path::{Path, PathBuf};
 #[cfg(feature = "ssr")]
 use std::str::FromStr;
 #[cfg(feature = "ssr")]
@@ -122,6 +122,21 @@ impl Logging {
     }
 }
 
+/// Where files created at runtime (uploaded banner, generated CSS) are kept
+#[cfg(feature = "ssr")]
+#[derive(Deserialize, Default)]
+pub struct Storage {
+    data_dir: Option<String>
+}
+
+#[cfg(feature = "ssr")]
+impl Storage {
+    /// Directory served under `/data`. Defaults to `data` in the working directory.
+    pub fn data_dir(&self) -> PathBuf {
+        PathBuf::from(self.data_dir.as_deref().unwrap_or("data"))
+    }
+}
+
 #[cfg(feature = "ssr")]
 #[derive(Deserialize)]
 pub struct Configuration {
@@ -129,7 +144,9 @@ pub struct Configuration {
     network: Network,
     database: Database,
     mailing: Mailing,
-    logging: Logging
+    logging: Logging,
+    #[serde(default)]
+    storage: Storage
 }
 
 #[cfg(feature = "ssr")]
@@ -149,13 +166,16 @@ impl Configuration {
     pub fn logging(&self) -> &Logging {
         &self.logging
     }
+    pub fn storage(&self) -> &Storage {
+        &self.storage
+    }
 }
 
-/// The config file holds passwords and the session key, so it must never lie in the directory
-/// that is served as static files. Returns true when `config_path` is inside `site_root`.
+/// The config file holds passwords and the session key, so it must never lie in a directory
+/// that is served as static files. Returns true when `config_path` is inside `public_dir`.
 #[cfg(feature = "ssr")]
-pub fn is_publicly_served(config_path: &Path, site_root: &Path) -> bool {
-    match (config_path.canonicalize(), site_root.canonicalize()) {
+pub fn is_publicly_served(config_path: &Path, public_dir: &Path) -> bool {
+    match (config_path.canonicalize(), public_dir.canonicalize()) {
         (Ok(config), Ok(root)) => config.starts_with(root),
         _ => false
     }
@@ -224,6 +244,22 @@ mod tests {
         std::fs::remove_dir_all(base).unwrap();
     }
 
+    #[test]
+    fn data_dir_defaults_to_data() {
+        // The sample config has the storage section commented out
+        assert_eq!(sample().storage().data_dir(), PathBuf::from("data"));
+
+        let storage: Storage = toml::from_str("").unwrap();
+        assert_eq!(storage.data_dir(), PathBuf::from("data"));
+    }
+
+    #[test]
+    fn data_dir_can_be_configured() {
+        let storage: Storage = toml::from_str("data_dir = '/var/lib/rezervator'").unwrap();
+
+        assert_eq!(storage.data_dir(), PathBuf::from("/var/lib/rezervator"));
+    }
+
     #[test]
     fn sample_session_key_is_long_enough() {
         // actix_web::cookie::Key::from panics on keys shorter than 64 bytes