proper permission checking

src/users/permissions.rs

@@ -3,6 +3,7 @@ use sqlx::PgConnection;
 use crate::{database::DatabaseError, users::User};
 
 /// Infradmin and systemuser have all permissions.
+#[derive(strum::IntoStaticStr)]
 pub enum Permission {
     // All Users have the right to observe their own sessions
     ListOthersSessions,
@@ -16,26 +17,41 @@ pub enum Permission {
     CreateTags,
     RenameTags,
     DeleteTags,
-    #[allow(unused)]
+    CreateQuotes,
     DeleteQuotes,
     ChangePersonPrimaryName,
-    #[allow(unused)]
     BrowseServerLogs,
     ConfigureInstance,
 }
 
+impl Permission {
+    pub fn is_default_permission(&self) -> bool {
+        match self {
+            Self::CreateTags | Self::CreateQuotes => true,
+            _ => false,
+        }
+    }
+}
+
 impl User {
     pub async fn has_permission(
         &self,
-        #[allow(unused)] conn: &mut PgConnection,
-        #[allow(unused)] permission: Permission,
+        conn: &mut PgConnection,
+        permission: Permission,
     ) -> Result<bool, DatabaseError> {
-        // Infradmin and systemuser have all permissions
         if self.is_infradmin() || self.is_systemuser() {
             return Ok(true);
         }
 
-        Ok(false)
-        // todo!("Do the permission checking here once permissions are modeled in the DB")
+        let permission_key: &'static str = (&permission).into();
+        let state: Option<bool> = sqlx::query_scalar(
+            "SELECT state FROM user_permissions WHERE user_id = $1 AND permission = $2",
+        )
+        .bind(self.id)
+        .bind(permission_key)
+        .fetch_optional(&mut *conn)
+        .await?;
+
+        Ok(state.unwrap_or_else(|| permission.is_default_permission()))
     }
 }