admin/roles: new role

crates/roles/src/database.rs

@@ -1,6 +1,7 @@
 use crate::error::Error;
 use crate::Role;
 use database::sqlx::SqliteExecutor;
+use database::Error as DatabaseError;
 use database::Roles as DatabaseRoles;
 use id::RoleID;
 
@@ -23,4 +24,21 @@ impl Role {
             .map(Self::from)
             .collect::<Vec<_>>())
     }
+
+    pub async fn insert(
+        conn: impl SqliteExecutor<'_>,
+        name: &RoleID,
+        label: &str,
+    ) -> Result<(), Error> {
+        DatabaseRoles::insert(conn, &name.0, label)
+            .await
+            .map_err(|e| match e {
+                DatabaseError::UniqueConstraintPrimaryKey => {
+                    Error::NameNotAvailable(name.to_string())
+                }
+                _ => e.into(),
+            })?;
+
+        Ok(())
+    }
 }

crates/roles/src/error.rs

@@ -5,4 +5,7 @@
 pub enum Error {
     #[error("Database: {0}")]
     Database(#[from] database::Error),
+
+    #[error("The name \"{0}\" is not available.")]
+    NameNotAvailable(String),
 }