Refactor appservices, pusher, timeline, transactionids, users

src/database/key_value/transaction_ids.rs

@@ -0,0 +1,35 @@
+impl service::pusher::Data for KeyValueDatabase {
+    pub fn add_txnid(
+        &self,
+        user_id: &UserId,
+        device_id: Option<&DeviceId>,
+        txn_id: &TransactionId,
+        data: &[u8],
+    ) -> Result<()> {
+        let mut key = user_id.as_bytes().to_vec();
+        key.push(0xff);
+        key.extend_from_slice(device_id.map(|d| d.as_bytes()).unwrap_or_default());
+        key.push(0xff);
+        key.extend_from_slice(txn_id.as_bytes());
+
+        self.userdevicetxnid_response.insert(&key, data)?;
+
+        Ok(())
+    }
+
+    pub fn existing_txnid(
+        &self,
+        user_id: &UserId,
+        device_id: Option<&DeviceId>,
+        txn_id: &TransactionId,
+    ) -> Result<Option<Vec<u8>>> {
+        let mut key = user_id.as_bytes().to_vec();
+        key.push(0xff);
+        key.extend_from_slice(device_id.map(|d| d.as_bytes()).unwrap_or_default());
+        key.push(0xff);
+        key.extend_from_slice(txn_id.as_bytes());
+
+        // If there's no entry, this is a new transaction
+        self.userdevicetxnid_response.get(&key)
+    }
+}