implement dumping and loading the full database

bffhd/users/mod.rs

@@ -178,6 +178,29 @@ impl Users {
         Ok(())
     }
 
+    pub fn load_map(&mut self, dump: &HashMap<String,UserData>) -> miette::Result<()> {
+        let mut txn = unsafe { self.userdb.get_rw_txn() }?;
+
+        self.userdb.clear_txn(&mut txn)?;
+
+        for (uid, data) in dump {
+            let user = db::User {
+                id: uid.clone(),
+                userdata: data.clone(),
+            };
+
+            tracing::trace!(%uid, ?user, "Storing user object");
+            if let Err(e) = self.userdb.put_txn(&mut txn, uid.as_str(), &user) {
+                tracing::warn!(error=?e, "failed to add user")
+            }
+        }
+        txn.commit().map_err(crate::db::Error::from)?;
+        Ok(())
+    }
+
+    pub fn dump_map(&self) -> miette::Result<HashMap<String, UserData>> {
+        return Ok(self.userdb.get_all()?)
+    }
     pub fn dump_file(&self, path_str: &str, force: bool) -> miette::Result<usize> {
         let path = Path::new(path_str);
         let exists = path.exists();
@@ -208,7 +231,7 @@ impl Users {
         }
         let mut file = fs::File::create(path).into_diagnostic()?;
 
-        let users = self.userdb.get_all()?;
+        let users = self.dump_map()?;
         let encoded = toml::ser::to_vec(&users).into_diagnostic()?;
         file.write_all(&encoded[..]).into_diagnostic()?;