feat(admin): add global message query route

crates/delta/src/routes/admin/message_query.rs

@@ -0,0 +1,31 @@
+use revolt_quark::{
+    models::{
+        message::{BulkMessageResponse, MessageQuery},
+        User,
+    },
+    Db, Error, Result,
+};
+use rocket::serde::json::Json;
+
+/// # Globally Fetch Messages
+///
+/// This is a privileged route to globally fetch messages.
+#[openapi(tag = "Admin")]
+#[post("/messages", data = "<data>")]
+pub async fn message_query(
+    db: &Db,
+    user: User,
+    data: Json<MessageQuery>,
+) -> Result<Json<BulkMessageResponse>> {
+    // Must be privileged for this route
+    if !user.privileged {
+        return Err(Error::NotPrivileged);
+    }
+
+    // Fetch data using query
+    let data = data.into_inner();
+    let messages = db.fetch_messages(data).await?;
+    BulkMessageResponse::transform(db, None, messages, Some(true))
+        .await
+        .map(Json)
+}