crypto: Load unsent outgoing key requests when we open a store

matrix_sdk_crypto/src/key_request.rs

@@ -149,6 +149,23 @@ pub struct OutgoingKeyRequest {
     pub sent_out: bool,
 }
 
+impl OutgoingKeyRequest {
+    fn into_request(
+        &self,
+        recipient: &UserId,
+        own_device_id: &DeviceId,
+    ) -> Result<OutgoingRequest, serde_json::Error> {
+        let content = RoomKeyRequestToDeviceEventContent {
+            action: Action::Request,
+            request_id: self.request_id.to_string(),
+            requesting_device_id: own_device_id.to_owned(),
+            body: Some(self.info.clone()),
+        };
+
+        wrap_key_request_content(recipient.to_owned(), self.request_id, &content)
+    }
+}
+
 impl PartialEq for OutgoingKeyRequest {
     fn eq(&self, other: &Self) -> bool {
         self.request_id == other.request_id
@@ -204,6 +221,25 @@ impl KeyRequestMachine {
         }
     }
 
+    /// Load stored non-sent out outgoing requests
+    pub async fn load_outgoing_requests(&mut self) -> Result<(), CryptoStoreError> {
+        let infos: Vec<OutgoingKeyRequest> = vec![];
+        let requests: DashMap<Uuid, OutgoingRequest> = infos
+            .iter()
+            .filter(|i| !i.sent_out)
+            .filter_map(|info| {
+                Some((
+                    info.request_id,
+                    info.into_request(self.user_id(), self.device_id()).ok()?,
+                ))
+            })
+            .collect();
+
+        self.outgoing_to_device_requests = requests.into();
+
+        Ok(())
+    }
+
     /// Our own user id.
     pub fn user_id(&self) -> &UserId {
         &self.user_id
@@ -542,21 +578,14 @@ impl KeyRequestMachine {
 
         let id = Uuid::new_v4();
 
-        let content = RoomKeyRequestToDeviceEventContent {
-            action: Action::Request,
-            request_id: id.to_string(),
-            requesting_device_id: (&*self.device_id).clone(),
-            body: Some(key_info),
-        };
-
-        let request = wrap_key_request_content(self.user_id().clone(), id, &content)?;
-
         let info = OutgoingKeyRequest {
             request_id: id,
-            info: content.body.unwrap(),
+            info: key_info,
             sent_out: false,
         };
 
+        let request = info.into_request(self.user_id(), self.device_id())?;
+
         self.save_outgoing_key_info(info).await?;
         self.outgoing_to_device_requests.insert(id, request);
 

matrix_sdk_crypto/src/machine.rs

@@ -245,9 +245,10 @@ impl OlmMachine {
             }
         };
 
-        Ok(OlmMachine::new_helper(
-            &user_id, device_id, store, account, identity,
-        ))
+        let mut machine = OlmMachine::new_helper(&user_id, device_id, store, account, identity);
+        machine.key_request_machine.load_outgoing_requests().await?;
+
+        Ok(machine)
     }
 
     /// Create a new machine with the default crypto store.

matrix_sdk_crypto/src/store/memorystore.rs

@@ -268,6 +268,14 @@ impl CryptoStore for MemoryStore {
             .and_then(|i| self.outgoing_key_requests.get(&i).map(|r| r.clone())))
     }
 
+    async fn get_outgoing_key_requests(&self) -> Result<Vec<OutgoingKeyRequest>> {
+        Ok(self
+            .outgoing_key_requests
+            .iter()
+            .map(|i| i.value().clone())
+            .collect())
+    }
+
     async fn delete_outgoing_key_request(&self, request_id: Uuid) -> Result<()> {
         self.outgoing_key_requests
             .remove(&request_id)

matrix_sdk_crypto/src/store/mod.rs

@@ -449,6 +449,9 @@ pub trait CryptoStore: AsyncTraitDeps {
         key_info: &RequestedKeyInfo,
     ) -> Result<Option<OutgoingKeyRequest>>;
 
+    /// Get all outgoing key requests that we have in the store.
+    async fn get_outgoing_key_requests(&self) -> Result<Vec<OutgoingKeyRequest>>;
+
     /// Delete an outoing key request that we created that matches the given
     /// request id.
     ///

matrix_sdk_crypto/src/store/sled.rs

@@ -709,6 +709,16 @@ impl CryptoStore for SledStore {
         }
     }
 
+    async fn get_outgoing_key_requests(&self) -> Result<Vec<OutgoingKeyRequest>> {
+        let requests: Result<Vec<OutgoingKeyRequest>> = self
+            .outgoing_key_requests
+            .iter()
+            .map(|i| serde_json::from_slice(&i?.1).map_err(CryptoStoreError::from))
+            .collect();
+
+        requests
+    }
+
     async fn delete_outgoing_key_request(&self, request_id: Uuid) -> Result<()> {
         let ret: Result<(), TransactionError<serde_json::Error>> =
             (&self.outgoing_key_requests, &self.key_requests_by_info).transaction(
@@ -1318,6 +1328,7 @@ mod test {
 
         let stored_request = store.get_key_request_by_info(&info).await.unwrap();
         assert_eq!(request, stored_request);
+        assert!(!store.get_outgoing_key_requests().await.unwrap().is_empty());
 
         store.delete_outgoing_key_request(id).await.unwrap();
 
@@ -1326,5 +1337,6 @@ mod test {
 
         let stored_request = store.get_key_request_by_info(&info).await.unwrap();
         assert_eq!(None, stored_request);
+        assert!(store.get_outgoing_key_requests().await.unwrap().is_empty());
     }
 }