Admin API to dynamically set policy data

crates/handlers/src/admin/mod.rs

@@ -45,6 +45,11 @@ fn finish(t: TransformOpenApi) -> TransformOpenApi {
             description: Some("Manage compatibility sessions from legacy clients".to_owned()),
             ..Tag::default()
         })
+        .tag(Tag {
+            name: "policy-data".to_owned(),
+            description: Some("Manage the dynamic policy data".to_owned()),
+            ..Tag::default()
+        })
         .tag(Tag {
             name: "oauth2-session".to_owned(),
             description: Some("Manage OAuth2 sessions".to_owned()),

crates/handlers/src/admin/model.rs

@@ -534,3 +534,50 @@ impl UpstreamOAuthLink {
         ]
     }
 }
+
+/// The policy data
+#[derive(Serialize, JsonSchema)]
+pub struct PolicyData {
+    #[serde(skip)]
+    id: Ulid,
+
+    /// The creation date of the policy data
+    created_at: DateTime<Utc>,
+
+    /// The policy data content
+    data: serde_json::Value,
+}
+
+impl From<mas_data_model::PolicyData> for PolicyData {
+    fn from(policy_data: mas_data_model::PolicyData) -> Self {
+        Self {
+            id: policy_data.id,
+            created_at: policy_data.created_at,
+            data: policy_data.data,
+        }
+    }
+}
+
+impl Resource for PolicyData {
+    const KIND: &'static str = "policy-data";
+    const PATH: &'static str = "/api/admin/v1/policy-data";
+
+    fn id(&self) -> Ulid {
+        self.id
+    }
+}
+
+impl PolicyData {
+    /// Samples of policy data
+    pub fn samples() -> [Self; 1] {
+        [Self {
+            id: Ulid::from_bytes([0x01; 16]),
+            created_at: DateTime::default(),
+            data: serde_json::json!({
+                "hello": "world",
+                "foo": 42,
+                "bar": true
+            }),
+        }]
+    }
+}

crates/handlers/src/admin/v1/mod.rs

@@ -17,6 +17,7 @@ use crate::passwords::PasswordManager;
 
 mod compat_sessions;
 mod oauth2_sessions;
+mod policy_data;
 mod upstream_oauth_links;
 mod user_emails;
 mod user_sessions;
@@ -47,6 +48,21 @@ where
             "/oauth2-sessions/{id}",
             get_with(self::oauth2_sessions::get, self::oauth2_sessions::get_doc),
         )
+        .api_route(
+            "/policy-data",
+            post_with(self::policy_data::set, self::policy_data::set_doc),
+        )
+        .api_route(
+            "/policy-data/latest",
+            get_with(
+                self::policy_data::get_latest,
+                self::policy_data::get_latest_doc,
+            ),
+        )
+        .api_route(
+            "/policy-data/{id}",
+            get_with(self::policy_data::get, self::policy_data::get_doc),
+        )
         .api_route(
             "/users",
             get_with(self::users::list, self::users::list_doc)

crates/handlers/src/admin/v1/policy_data/get.rs

@@ -0,0 +1,153 @@
+// Copyright 2025 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+
+use aide::{OperationIo, transform::TransformOperation};
+use axum::{Json, response::IntoResponse};
+use hyper::StatusCode;
+use ulid::Ulid;
+
+use crate::{
+    admin::{
+        call_context::CallContext,
+        model::PolicyData,
+        params::UlidPathParam,
+        response::{ErrorResponse, SingleResponse},
+    },
+    impl_from_error_for_route,
+};
+
+#[derive(Debug, thiserror::Error, OperationIo)]
+#[aide(output_with = "Json<ErrorResponse>")]
+pub enum RouteError {
+    #[error(transparent)]
+    Internal(Box<dyn std::error::Error + Send + Sync + 'static>),
+
+    #[error("Policy data with ID {0} not found")]
+    NotFound(Ulid),
+}
+
+impl_from_error_for_route!(mas_storage::RepositoryError);
+
+impl IntoResponse for RouteError {
+    fn into_response(self) -> axum::response::Response {
+        let error = ErrorResponse::from_error(&self);
+        let status = match self {
+            Self::Internal(_) => StatusCode::INTERNAL_SERVER_ERROR,
+            Self::NotFound(_) => StatusCode::NOT_FOUND,
+        };
+        (status, Json(error)).into_response()
+    }
+}
+
+pub fn doc(operation: TransformOperation) -> TransformOperation {
+    operation
+        .id("getPolicyData")
+        .summary("Get policy data by ID")
+        .tag("policy-data")
+        .response_with::<200, Json<SingleResponse<PolicyData>>, _>(|t| {
+            let [sample, ..] = PolicyData::samples();
+            let response = SingleResponse::new_canonical(sample);
+            t.description("Policy data was found").example(response)
+        })
+        .response_with::<404, RouteError, _>(|t| {
+            let response = ErrorResponse::from_error(&RouteError::NotFound(Ulid::nil()));
+            t.description("Policy data was not found").example(response)
+        })
+}
+
+#[tracing::instrument(name = "handler.admin.v1.policy_data.get", skip_all, err)]
+pub async fn handler(
+    CallContext { mut repo, .. }: CallContext,
+    id: UlidPathParam,
+) -> Result<Json<SingleResponse<PolicyData>>, RouteError> {
+    let policy_data = repo
+        .policy_data()
+        .get()
+        .await?
+        .ok_or(RouteError::NotFound(*id))?;
+
+    Ok(Json(SingleResponse::new_canonical(policy_data.into())))
+}
+
+#[cfg(test)]
+mod tests {
+    use hyper::{Request, StatusCode};
+    use insta::assert_json_snapshot;
+    use sqlx::PgPool;
+    use ulid::Ulid;
+
+    use crate::test_utils::{RequestBuilderExt, ResponseExt, TestState, setup};
+
+    #[sqlx::test(migrator = "mas_storage_pg::MIGRATOR")]
+    async fn test_get(pool: PgPool) {
+        setup();
+        let mut state = TestState::from_pool(pool).await.unwrap();
+        let token = state.token_with_scope("urn:mas:admin").await;
+
+        let mut rng = state.rng();
+        let mut repo = state.repository().await.unwrap();
+
+        let policy_data = repo
+            .policy_data()
+            .set(
+                &mut rng,
+                &state.clock,
+                serde_json::json!({"hello": "world"}),
+            )
+            .await
+            .unwrap();
+
+        repo.save().await.unwrap();
+
+        let request = Request::get(format!("/api/admin/v1/policy-data/{}", policy_data.id))
+            .bearer(&token)
+            .empty();
+        let response = state.request(request).await;
+        response.assert_status(StatusCode::OK);
+        let body: serde_json::Value = response.json();
+        assert_json_snapshot!(body, @r###"
+        {
+          "data": {
+            "type": "policy-data",
+            "id": "01FSHN9AG0MZAA6S4AF7CTV32E",
+            "attributes": {
+              "created_at": "2022-01-16T14:40:00Z",
+              "data": {
+                "hello": "world"
+              }
+            },
+            "links": {
+              "self": "/api/admin/v1/policy-data/01FSHN9AG0MZAA6S4AF7CTV32E"
+            }
+          },
+          "links": {
+            "self": "/api/admin/v1/policy-data/01FSHN9AG0MZAA6S4AF7CTV32E"
+          }
+        }
+        "###);
+    }
+
+    #[sqlx::test(migrator = "mas_storage_pg::MIGRATOR")]
+    async fn test_get_not_found(pool: PgPool) {
+        setup();
+        let mut state = TestState::from_pool(pool).await.unwrap();
+        let token = state.token_with_scope("urn:mas:admin").await;
+
+        let request = Request::get(format!("/api/admin/v1/policy-data/{}", Ulid::nil()))
+            .bearer(&token)
+            .empty();
+        let response = state.request(request).await;
+        response.assert_status(StatusCode::NOT_FOUND);
+        let body: serde_json::Value = response.json();
+        assert_json_snapshot!(body, @r###"
+        {
+          "errors": [
+            {
+              "title": "Policy data with ID 00000000000000000000000000 not found"
+            }
+          ]
+        }
+        "###);
+    }
+}

crates/handlers/src/admin/v1/policy_data/get_latest.rs

@@ -0,0 +1,149 @@
+// Copyright 2025 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+
+use aide::{OperationIo, transform::TransformOperation};
+use axum::{Json, response::IntoResponse};
+use hyper::StatusCode;
+
+use crate::{
+    admin::{
+        call_context::CallContext,
+        model::PolicyData,
+        response::{ErrorResponse, SingleResponse},
+    },
+    impl_from_error_for_route,
+};
+
+#[derive(Debug, thiserror::Error, OperationIo)]
+#[aide(output_with = "Json<ErrorResponse>")]
+pub enum RouteError {
+    #[error(transparent)]
+    Internal(Box<dyn std::error::Error + Send + Sync + 'static>),
+
+    #[error("No policy data found")]
+    NotFound,
+}
+
+impl_from_error_for_route!(mas_storage::RepositoryError);
+
+impl IntoResponse for RouteError {
+    fn into_response(self) -> axum::response::Response {
+        let error = ErrorResponse::from_error(&self);
+        let status = match self {
+            Self::Internal(_) => StatusCode::INTERNAL_SERVER_ERROR,
+            Self::NotFound => StatusCode::NOT_FOUND,
+        };
+        (status, Json(error)).into_response()
+    }
+}
+
+pub fn doc(operation: TransformOperation) -> TransformOperation {
+    operation
+        .id("getLatestPolicyData")
+        .summary("Get the latest policy data")
+        .tag("policy-data")
+        .response_with::<200, Json<SingleResponse<PolicyData>>, _>(|t| {
+            let [sample, ..] = PolicyData::samples();
+            let response = SingleResponse::new_canonical(sample);
+            t.description("Latest policy data was found")
+                .example(response)
+        })
+        .response_with::<404, RouteError, _>(|t| {
+            let response = ErrorResponse::from_error(&RouteError::NotFound);
+            t.description("No policy data was found").example(response)
+        })
+}
+
+#[tracing::instrument(name = "handler.admin.v1.policy_data.get_latest", skip_all, err)]
+pub async fn handler(
+    CallContext { mut repo, .. }: CallContext,
+) -> Result<Json<SingleResponse<PolicyData>>, RouteError> {
+    let policy_data = repo
+        .policy_data()
+        .get()
+        .await?
+        .ok_or(RouteError::NotFound)?;
+
+    Ok(Json(SingleResponse::new_canonical(policy_data.into())))
+}
+
+#[cfg(test)]
+mod tests {
+    use hyper::{Request, StatusCode};
+    use insta::assert_json_snapshot;
+    use sqlx::PgPool;
+
+    use crate::test_utils::{RequestBuilderExt, ResponseExt, TestState, setup};
+
+    #[sqlx::test(migrator = "mas_storage_pg::MIGRATOR")]
+    async fn test_get_latest(pool: PgPool) {
+        setup();
+        let mut state = TestState::from_pool(pool).await.unwrap();
+        let token = state.token_with_scope("urn:mas:admin").await;
+
+        let mut rng = state.rng();
+        let mut repo = state.repository().await.unwrap();
+
+        repo.policy_data()
+            .set(
+                &mut rng,
+                &state.clock,
+                serde_json::json!({"hello": "world"}),
+            )
+            .await
+            .unwrap();
+
+        repo.save().await.unwrap();
+
+        let request = Request::get("/api/admin/v1/policy-data/latest")
+            .bearer(&token)
+            .empty();
+        let response = state.request(request).await;
+        response.assert_status(StatusCode::OK);
+        let body: serde_json::Value = response.json();
+        assert_json_snapshot!(body, @r###"
+        {
+          "data": {
+            "type": "policy-data",
+            "id": "01FSHN9AG0MZAA6S4AF7CTV32E",
+            "attributes": {
+              "created_at": "2022-01-16T14:40:00Z",
+              "data": {
+                "hello": "world"
+              }
+            },
+            "links": {
+              "self": "/api/admin/v1/policy-data/01FSHN9AG0MZAA6S4AF7CTV32E"
+            }
+          },
+          "links": {
+            "self": "/api/admin/v1/policy-data/01FSHN9AG0MZAA6S4AF7CTV32E"
+          }
+        }
+        "###);
+    }
+
+    #[sqlx::test(migrator = "mas_storage_pg::MIGRATOR")]
+    async fn test_get_no_latest(pool: PgPool) {
+        setup();
+        let mut state = TestState::from_pool(pool).await.unwrap();
+        let token = state.token_with_scope("urn:mas:admin").await;
+
+        let request = Request::get("/api/admin/v1/policy-data/latest")
+            .bearer(&token)
+            .empty();
+        let response = state.request(request).await;
+        response.assert_status(StatusCode::NOT_FOUND);
+        let body: serde_json::Value = response.json();
+        assert_json_snapshot!(body, @r###"
+        {
+          "errors": [
+            {
+              "title": "No policy data found"
+            }
+          ]
+        }
+        "###);
+    }
+}