graphql: API to set the user displayname (#1412)

crates/graphql/src/mutations/matrix.rs

@@ -0,0 +1,115 @@
+// Copyright 2023 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use anyhow::Context as _;
+use async_graphql::{Context, Description, Enum, InputObject, Object, ID};
+
+use crate::{
+    model::{NodeType, User},
+    state::ContextExt,
+};
+
+#[derive(Default)]
+pub struct MatrixMutations {
+    _private: (),
+}
+
+/// The input for the `addEmail` mutation
+#[derive(InputObject)]
+struct SetDisplayNameInput {
+    /// The ID of the user to add the email address to
+    user_id: ID,
+
+    /// The display name to set. If `None`, the display name will be removed.
+    display_name: Option<String>,
+}
+
+/// The status of the `setDisplayName` mutation
+#[derive(Enum, Copy, Clone, Eq, PartialEq)]
+pub enum SetDisplayNameStatus {
+    /// The display name was set
+    Set,
+    /// The display name is invalid
+    Invalid,
+}
+
+/// The payload of the `setDisplayName` mutation
+#[derive(Description)]
+enum SetDisplayNamePayload {
+    Set(User),
+    Invalid,
+}
+
+#[Object(use_type_description)]
+impl SetDisplayNamePayload {
+    /// Status of the operation
+    async fn status(&self) -> SetDisplayNameStatus {
+        match self {
+            SetDisplayNamePayload::Set(_) => SetDisplayNameStatus::Set,
+            SetDisplayNamePayload::Invalid => SetDisplayNameStatus::Invalid,
+        }
+    }
+
+    /// The user that was updated
+    async fn user(&self) -> Option<&User> {
+        match self {
+            SetDisplayNamePayload::Set(user) => Some(user),
+            SetDisplayNamePayload::Invalid => None,
+        }
+    }
+}
+
+#[Object]
+impl MatrixMutations {
+    /// Set the display name of a user
+    async fn set_display_name(
+        &self,
+        ctx: &Context<'_>,
+        input: SetDisplayNameInput,
+    ) -> Result<SetDisplayNamePayload, async_graphql::Error> {
+        let state = ctx.state();
+        let id = NodeType::User.extract_ulid(&input.user_id)?;
+        let requester = ctx.requester();
+
+        let user = requester.user().context("Unauthorized")?;
+
+        if user.id != id {
+            return Err(async_graphql::Error::new("Unauthorized"));
+        }
+
+        let conn = state.homeserver_connection();
+        let mxid = conn.mxid(&user.username);
+
+        if let Some(display_name) = &input.display_name {
+            // Let's do some basic validation on the display name
+            if display_name.len() > 256 {
+                return Ok(SetDisplayNamePayload::Invalid);
+            }
+
+            if display_name.is_empty() {
+                return Ok(SetDisplayNamePayload::Invalid);
+            }
+
+            conn.set_displayname(&mxid, display_name)
+                .await
+                .context("Failed to set display name")?;
+        } else {
+            conn.unset_displayname(&mxid)
+                .await
+                .context("Failed to unset display name")?;
+        }
+
+        Ok(SetDisplayNamePayload::Set(User(user.clone())))
+    }
+}

crates/graphql/src/mutations/mod.rs

@@ -14,6 +14,7 @@
 
 mod browser_session;
 mod compat_session;
+mod matrix;
 mod oauth2_session;
 mod user_email;
 
@@ -26,6 +27,7 @@ pub struct Mutation(
     oauth2_session::OAuth2SessionMutations,
     compat_session::CompatSessionMutations,
     browser_session::BrowserSessionMutations,
+    matrix::MatrixMutations,
 );
 
 impl Mutation {

crates/matrix-synapse/src/lib.rs

@@ -119,9 +119,14 @@ struct SynapseUser {
     external_ids: Option<Vec<ExternalID>>,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Serialize)]
-struct SynapseDevice {
+struct SynapseDevice<'a> {
-    device_id: String,
+    device_id: &'a str,
+}
+
+#[derive(Serialize)]
+struct SetDisplayNameRequest<'a> {
+    displayname: &'a str,
 }
 
 #[derive(Serialize)]
@@ -257,9 +262,7 @@ impl HomeserverConnection for SynapseConnection {
 
         let request = self
             .post(&format!("_synapse/admin/v2/users/{mxid}/devices"))
-            .body(SynapseDevice {
+            .body(SynapseDevice { device_id })?;
-                device_id: device_id.to_owned(),
-            })?;
 
         let response = client.ready().await?.call(request).await?;
 
@@ -328,4 +331,48 @@ impl HomeserverConnection for SynapseConnection {
 
         Ok(())
     }
+
+    #[tracing::instrument(
+        name = "homeserver.set_displayname",
+        skip_all,
+        fields(
+            matrix.homeserver = self.homeserver,
+            matrix.mxid = mxid,
+            matrix.displayname = displayname,
+        ),
+        err(Display),
+    )]
+    async fn set_displayname(&self, mxid: &str, displayname: &str) -> Result<(), Self::Error> {
+        let mut client = self
+            .http_client_factory
+            .client()
+            .await?
+            .request_bytes_to_body()
+            .json_request();
+
+        let request = self
+            .put(&format!("_matrix/client/v3/profile/{mxid}/displayname"))
+            .body(SetDisplayNameRequest { displayname })?;
+
+        let response = client.ready().await?.call(request).await?;
+
+        if response.status() != StatusCode::OK {
+            return Err(anyhow::anyhow!("Failed to set displayname in Synapse"));
+        }
+
+        Ok(())
+    }
+
+    #[tracing::instrument(
+        name = "homeserver.unset_displayname",
+        skip_all,
+        fields(
+            matrix.homeserver = self.homeserver,
+            matrix.mxid = mxid,
+        ),
+        err(Display),
+    )]
+    async fn unset_displayname(&self, mxid: &str) -> Result<(), Self::Error> {
+        self.set_displayname(mxid, "").await
+    }
 }

crates/matrix/src/lib.rs

@@ -95,7 +95,10 @@ impl ProvisionRequest {
     /// # Parameters
     ///
     /// * `callback` - The callback to call.
-    pub fn on_displayname(&self, callback: impl FnOnce(Option<&str>)) -> &Self {
+    pub fn on_displayname<F>(&self, callback: F) -> &Self
+    where
+        F: FnOnce(Option<&str>),
+    {
         match &self.displayname {
             FieldAction::Unset => callback(None),
             FieldAction::Set(displayname) => callback(Some(displayname)),
@@ -128,7 +131,10 @@ impl ProvisionRequest {
     /// # Parameters
     ///
     /// * `callback` - The callback to call.
-    pub fn on_avatar_url(&self, callback: impl FnOnce(Option<&str>)) -> &Self {
+    pub fn on_avatar_url<F>(&self, callback: F) -> &Self
+    where
+        F: FnOnce(Option<&str>),
+    {
         match &self.avatar_url {
             FieldAction::Unset => callback(None),
             FieldAction::Set(avatar_url) => callback(Some(avatar_url)),
@@ -161,7 +167,10 @@ impl ProvisionRequest {
     /// # Parameters
     ///
     /// * `callback` - The callback to call.
-    pub fn on_emails(&self, callback: impl FnOnce(Option<&[String]>)) -> &Self {
+    pub fn on_emails<F>(&self, callback: F) -> &Self
+    where
+        F: FnOnce(Option<&[String]>),
+    {
         match &self.emails {
             FieldAction::Unset => callback(None),
             FieldAction::Set(emails) => callback(Some(emails)),
@@ -252,6 +261,31 @@ pub trait HomeserverConnection: Send + Sync {
     /// Returns an error if the homeserver is unreachable or the user could not
     /// be deleted.
     async fn delete_user(&self, mxid: &str, erase: bool) -> Result<(), Self::Error>;
+
+    /// Set the displayname of a user on the homeserver.
+    ///
+    /// # Parameters
+    ///
+    /// * `mxid` - The Matrix ID of the user to set the displayname for.
+    /// * `displayname` - The displayname to set.
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the homeserver is unreachable or the displayname
+    /// could not be set.
+    async fn set_displayname(&self, mxid: &str, displayname: &str) -> Result<(), Self::Error>;
+
+    /// Unset the displayname of a user on the homeserver.
+    ///
+    /// # Parameters
+    ///
+    /// * `mxid` - The Matrix ID of the user to unset the displayname for.
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the homeserver is unreachable or the displayname
+    /// could not be unset.
+    async fn unset_displayname(&self, mxid: &str) -> Result<(), Self::Error>;
 }
 
 #[async_trait::async_trait]
@@ -281,4 +315,12 @@ impl<T: HomeserverConnection + Send + Sync + ?Sized> HomeserverConnection for &T
     async fn delete_user(&self, mxid: &str, erase: bool) -> Result<(), Self::Error> {
         (**self).delete_user(mxid, erase).await
     }
+
+    async fn set_displayname(&self, mxid: &str, displayname: &str) -> Result<(), Self::Error> {
+        (**self).set_displayname(mxid, displayname).await
+    }
+
+    async fn unset_displayname(&self, mxid: &str) -> Result<(), Self::Error> {
+        (**self).unset_displayname(mxid).await
+    }
 }

crates/matrix/src/mock.rs

@@ -122,6 +122,20 @@ impl crate::HomeserverConnection for HomeserverConnection {
 
         Ok(())
     }
+
+    async fn set_displayname(&self, mxid: &str, displayname: &str) -> Result<(), Self::Error> {
+        let mut users = self.users.write().await;
+        let user = users.get_mut(mxid).context("User not found")?;
+        user.displayname = Some(displayname.to_owned());
+        Ok(())
+    }
+
+    async fn unset_displayname(&self, mxid: &str) -> Result<(), Self::Error> {
+        let mut users = self.users.write().await;
+        let user = users.get_mut(mxid).context("User not found")?;
+        user.displayname = None;
+        Ok(())
+    }
 }
 
 #[cfg(test)]
@@ -150,10 +164,22 @@ mod tests {
         let inserted = conn.provision_user(&request).await.unwrap();
         assert!(inserted);
 
-        let user = conn.query_user("@test:example.org").await.unwrap();
+        let user = conn.query_user(mxid).await.unwrap();
         assert_eq!(user.displayname, Some("Test User".into()));
         assert_eq!(user.avatar_url, Some("mxc://example.org/1234567890".into()));
 
+        // Set the displayname again
+        assert!(conn.set_displayname(mxid, "John").await.is_ok());
+
+        let user = conn.query_user(mxid).await.unwrap();
+        assert_eq!(user.displayname, Some("John".into()));
+
+        // Unset the displayname
+        assert!(conn.unset_displayname(mxid).await.is_ok());
+
+        let user = conn.query_user(mxid).await.unwrap();
+        assert_eq!(user.displayname, None);
+
         // Deleting a non-existent device should not fail
         assert!(conn.delete_device(mxid, device).await.is_ok());
 

frontend/schema.graphql

@@ -459,6 +459,10 @@ type Mutation {
   endOauth2Session(input: EndOAuth2SessionInput!): EndOAuth2SessionPayload!
   endCompatSession(input: EndCompatSessionInput!): EndCompatSessionPayload!
   endBrowserSession(input: EndBrowserSessionInput!): EndBrowserSessionPayload!
+  """
+  Set the display name of a user
+  """
+  setDisplayName(input: SetDisplayNameInput!): SetDisplayNamePayload!
 }
 
 """
@@ -757,6 +761,48 @@ enum SendVerificationEmailStatus {
   ALREADY_VERIFIED
 }
 
+"""
+The input for the `addEmail` mutation
+"""
+input SetDisplayNameInput {
+  """
+  The ID of the user to add the email address to
+  """
+  userId: ID!
+  """
+  The display name to set. If `None`, the display name will be removed.
+  """
+  displayName: String
+}
+
+"""
+The payload of the `setDisplayName` mutation
+"""
+type SetDisplayNamePayload {
+  """
+  Status of the operation
+  """
+  status: SetDisplayNameStatus!
+  """
+  The user that was updated
+  """
+  user: User
+}
+
+"""
+The status of the `setDisplayName` mutation
+"""
+enum SetDisplayNameStatus {
+  """
+  The display name was set
+  """
+  SET
+  """
+  The display name is invalid
+  """
+  INVALID
+}
+
 """
 The input for the `setPrimaryEmail` mutation
 """

frontend/src/gql/graphql.ts

@@ -323,6 +323,8 @@ export type Mutation = {
   removeEmail: RemoveEmailPayload;
   /** Send a verification code for an email address */
   sendVerificationEmail: SendVerificationEmailPayload;
+  /** Set the display name of a user */
+  setDisplayName: SetDisplayNamePayload;
   /** Set an email address as primary */
   setPrimaryEmail: SetPrimaryEmailPayload;
   /** Submit a verification code for an email address */
@@ -359,6 +361,11 @@ export type MutationSendVerificationEmailArgs = {
   input: SendVerificationEmailInput;
 };
 
+/** The mutations root of the GraphQL interface. */
+export type MutationSetDisplayNameArgs = {
+  input: SetDisplayNameInput;
+};
+
 /** The mutations root of the GraphQL interface. */
 export type MutationSetPrimaryEmailArgs = {
   input: SetPrimaryEmailInput;
@@ -589,6 +596,31 @@ export enum SendVerificationEmailStatus {
   Sent = "SENT",
 }
 
+/** The input for the `addEmail` mutation */
+export type SetDisplayNameInput = {
+  /** The display name to set. If `None`, the display name will be removed. */
+  displayName?: InputMaybe<Scalars["String"]["input"]>;
+  /** The ID of the user to add the email address to */
+  userId: Scalars["ID"]["input"];
+};
+
+/** The payload of the `setDisplayName` mutation */
+export type SetDisplayNamePayload = {
+  __typename?: "SetDisplayNamePayload";
+  /** Status of the operation */
+  status: SetDisplayNameStatus;
+  /** The user that was updated */
+  user?: Maybe<User>;
+};
+
+/** The status of the `setDisplayName` mutation */
+export enum SetDisplayNameStatus {
+  /** The display name is invalid */
+  Invalid = "INVALID",
+  /** The display name was set */
+  Set = "SET",
+}
+
 /** The input for the `setPrimaryEmail` mutation */
 export type SetPrimaryEmailInput = {
   /** The ID of the email address to set as primary */

frontend/src/gql/schema.ts

@@ -906,6 +906,29 @@ export default {
               },
             ],
           },
+          {
+            name: "setDisplayName",
+            type: {
+              kind: "NON_NULL",
+              ofType: {
+                kind: "OBJECT",
+                name: "SetDisplayNamePayload",
+                ofType: null,
+              },
+            },
+            args: [
+              {
+                name: "input",
+                type: {
+                  kind: "NON_NULL",
+                  ofType: {
+                    kind: "SCALAR",
+                    name: "Any",
+                  },
+                },
+              },
+            ],
+          },
           {
             name: "setPrimaryEmail",
             type: {
@@ -1644,6 +1667,33 @@ export default {
         ],
         interfaces: [],
       },
+      {
+        kind: "OBJECT",
+        name: "SetDisplayNamePayload",
+        fields: [
+          {
+            name: "status",
+            type: {
+              kind: "NON_NULL",
+              ofType: {
+                kind: "SCALAR",
+                name: "Any",
+              },
+            },
+            args: [],
+          },
+          {
+            name: "user",
+            type: {
+              kind: "OBJECT",
+              name: "User",
+              ofType: null,
+            },
+            args: [],
+          },
+        ],
+        interfaces: [],
+      },
       {
         kind: "OBJECT",
         name: "SetPrimaryEmailPayload",