Add local DB resource registration

crates/geth-db/Cargo.toml

@@ -7,4 +7,5 @@ license.workspace = true
 
 [dependencies]
 serde.workspace = true
+thiserror.workspace = true
 geth-types = { path = "../geth-types" }

crates/geth-db/src/lib.rs

@@ -5,11 +5,47 @@ use serde::{Deserialize, Serialize};
 pub struct DbResource {
     pub id: DbId,
     pub resource: ResourceId,
+    pub name: String,
     pub path: String,
+    pub path_exists: bool,
+    pub size_bytes: Option<u64>,
+    pub schema_metadata: String,
     pub sync_status: String,
 }
 
+#[derive(Debug, thiserror::Error)]
+pub enum DbError {
+    #[error("invalid db resource name: {0}")]
+    InvalidName(String),
+}
+
+pub fn validate_db_name(name: &str) -> Result<(), DbError> {
+    if name.is_empty()
+        || !name
+            .bytes()
+            .all(|byte| byte.is_ascii_alphanumeric() || matches!(byte, b'.' | b'_' | b'-'))
+    {
+        return Err(DbError::InvalidName(name.to_owned()));
+    }
+    Ok(())
+}
+
 #[must_use]
 pub fn crsqlite_sync_roadmap() -> &'static str {
     "future db sync reads crsql_changes, exchanges changes over Iroh, and applies through crsql_changes"
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn db_name_validation_rejects_paths_and_empty_names() {
+        assert!(validate_db_name("notes").is_ok());
+        assert!(validate_db_name("notes.v1").is_ok());
+        assert!(validate_db_name("").is_err());
+        assert!(validate_db_name("../notes").is_err());
+        assert!(validate_db_name("notes/main").is_err());
+        assert!(validate_db_name("notes main").is_err());
+    }
+}