graphql: Add a method to update a user

app/queries/create_user.graphql

@@ -1,4 +1,4 @@
-mutation CreateUser($user: UserInput!) {
+mutation CreateUser($user: CreateUserInput!) {
   createUser(user: $user) {
     id
     creationDate

app/src/create_user.rs

@@ -46,7 +46,7 @@ impl CreateUserForm {
         match msg {
             Msg::SubmitForm => {
                 let req = create_user::Variables {
-                    user: create_user::UserInput {
+                    user: create_user::CreateUserInput {
                         id: get_element("username")
                             .filter(not_empty)
                             .ok_or_else(|| anyhow!("Missing username"))?,

schema.graphql

@@ -4,7 +4,8 @@ input EqualityConstraint {
 }
 
 type Mutation {
-  createUser(user: UserInput!): User!
+  createUser(user: CreateUserInput!): User!
+  updateUser(user: UpdateUserInput!): Success!
 }
 
 type Group {
@@ -28,7 +29,7 @@ input RequestFilter {
 scalar DateTimeUtc
 
 "The details required to create a user."
-input UserInput {
+input CreateUserInput {
   id: String!
   email: String!
   displayName: String
@@ -53,6 +54,19 @@ type User {
   groups: [Group!]!
 }
 
+type Success {
+  ok: Boolean!
+}
+
+"The fields that can be updated for a user."
+input UpdateUserInput {
+  id: String!
+  email: String
+  displayName: String
+  firstName: String
+  lastName: String
+}
+
 schema {
   query: Query
   mutation: Mutation

server/src/domain/handler.rs

@@ -59,6 +59,16 @@ pub struct CreateUserRequest {
     pub last_name: Option<String>,
 }
 
+#[derive(PartialEq, Eq, Debug, Serialize, Deserialize, Clone, Default)]
+pub struct UpdateUserRequest {
+    // Same fields as CreateUserRequest, but no with an extra layer of Option.
+    pub user_id: String,
+    pub email: Option<String>,
+    pub display_name: Option<String>,
+    pub first_name: Option<String>,
+    pub last_name: Option<String>,
+}
+
 #[async_trait]
 pub trait LoginHandler: Clone + Send {
     async fn bind(&self, request: BindRequest) -> Result<()>;
@@ -73,6 +83,7 @@ pub trait BackendHandler: Clone + Send {
     async fn list_groups(&self) -> Result<Vec<Group>>;
     async fn get_user_details(&self, user_id: &str) -> Result<User>;
     async fn create_user(&self, request: CreateUserRequest) -> Result<()>;
+    async fn update_user(&self, request: UpdateUserRequest) -> Result<()>;
     async fn delete_user(&self, user_id: &str) -> Result<()>;
     async fn create_group(&self, group_name: &str) -> Result<GroupId>;
     async fn add_user_to_group(&self, user_id: &str, group_id: GroupId) -> Result<()>;
@@ -91,6 +102,7 @@ mockall::mock! {
         async fn list_groups(&self) -> Result<Vec<Group>>;
         async fn get_user_details(&self, user_id: &str) -> Result<User>;
         async fn create_user(&self, request: CreateUserRequest) -> Result<()>;
+        async fn update_user(&self, request: UpdateUserRequest) -> Result<()>;
         async fn delete_user(&self, user_id: &str) -> Result<()>;
         async fn create_group(&self, group_name: &str) -> Result<GroupId>;
         async fn get_user_groups(&self, user: &str) -> Result<HashSet<String>>;

server/src/domain/sql_backend_handler.rs

@@ -193,6 +193,31 @@ impl BackendHandler for SqlBackendHandler {
         Ok(())
     }
 
+    async fn update_user(&self, request: UpdateUserRequest) -> Result<()> {
+        let mut values = Vec::new();
+        if let Some(email) = request.email {
+            values.push((Users::Email, email.into()));
+        }
+        if let Some(display_name) = request.display_name {
+            values.push((Users::DisplayName, display_name.into()));
+        }
+        if let Some(first_name) = request.first_name {
+            values.push((Users::FirstName, first_name.into()));
+        }
+        if let Some(last_name) = request.last_name {
+            values.push((Users::LastName, last_name.into()));
+        }
+        if values.is_empty() {
+            return Ok(());
+        }
+        let query = Query::update()
+            .table(Users::Table)
+            .values(values)
+            .to_string(DbQueryBuilder {});
+        sqlx::query(&query).execute(&self.sql_pool).await?;
+        Ok(())
+    }
+
     async fn delete_user(&self, user_id: &str) -> Result<()> {
         let delete_query = Query::delete()
             .from_table(Users::Table)

server/src/infra/graphql/mutation.rs

@@ -1,5 +1,5 @@
-use crate::domain::handler::{BackendHandler, CreateUserRequest};
-use juniper::{graphql_object, FieldResult, GraphQLInputObject};
+use crate::domain::handler::{BackendHandler, CreateUserRequest, UpdateUserRequest};
+use juniper::{graphql_object, FieldResult, GraphQLInputObject, GraphQLObject};
 
 use super::api::Context;
 
@@ -19,7 +19,7 @@ impl<Handler: BackendHandler> Mutation<Handler> {
 
 #[derive(PartialEq, Eq, Debug, GraphQLInputObject)]
 /// The details required to create a user.
-pub struct UserInput {
+pub struct CreateUserInput {
     id: String,
     email: String,
     display_name: Option<String>,
@@ -27,11 +27,32 @@ pub struct UserInput {
     last_name: Option<String>,
 }
 
+#[derive(PartialEq, Eq, Debug, GraphQLInputObject)]
+/// The fields that can be updated for a user.
+pub struct UpdateUserInput {
+    id: String,
+    email: Option<String>,
+    display_name: Option<String>,
+    first_name: Option<String>,
+    last_name: Option<String>,
+}
+
+#[derive(PartialEq, Eq, Debug, GraphQLObject)]
+pub struct Success {
+    ok: bool,
+}
+
+impl Success {
+    fn new() -> Self {
+        Self { ok: true }
+    }
+}
+
 #[graphql_object(context = Context<Handler>)]
 impl<Handler: BackendHandler + Sync> Mutation<Handler> {
     async fn create_user(
         context: &Context<Handler>,
-        user: UserInput,
+        user: CreateUserInput,
     ) -> FieldResult<super::query::User<Handler>> {
         if !context.validation_result.is_admin {
             return Err("Unauthorized user creation".into());
@@ -52,4 +73,24 @@ impl<Handler: BackendHandler + Sync> Mutation<Handler> {
             .await
             .map(Into::into)?)
     }
+
+    async fn update_user(
+        context: &Context<Handler>,
+        user: UpdateUserInput,
+    ) -> FieldResult<Success> {
+        if !context.validation_result.can_access(&user.id) {
+            return Err("Unauthorized user update".into());
+        }
+        context
+            .handler
+            .update_user(UpdateUserRequest {
+                user_id: user.id,
+                email: user.email,
+                display_name: user.display_name,
+                first_name: user.first_name,
+                last_name: user.last_name,
+            })
+            .await?;
+        Ok(Success::new())
+    }
 }

server/src/infra/tcp_backend_handler.rs

@@ -31,6 +31,7 @@ mockall::mock! {
         async fn get_user_details(&self, user_id: &str) -> DomainResult<User>;
         async fn get_user_groups(&self, user: &str) -> DomainResult<HashSet<String>>;
         async fn create_user(&self, request: CreateUserRequest) -> DomainResult<()>;
+        async fn update_user(&self, request: UpdateUserRequest) -> DomainResult<()>;
         async fn delete_user(&self, user_id: &str) -> DomainResult<()>;
         async fn create_group(&self, group_name: &str) -> DomainResult<GroupId>;
         async fn add_user_to_group(&self, user_id: &str, group_id: GroupId) -> DomainResult<()>;