feat: Message pinning

crates/delta/src/routes/channels/message_unpin.rs

@@ -0,0 +1,39 @@
+use revolt_database::{
+    util::{permissions::DatabasePermissionQuery, reference::Reference}, Database, PartialMessage, User
+};
+use revolt_permissions::{calculate_channel_permissions, ChannelPermission};
+use revolt_result::{create_error, Result};
+use rocket::State;
+use rocket_empty::EmptyResponse;
+
+/// # Unpins a message
+///
+/// Unpins a message by its id.
+#[openapi(tag = "Messaging")]
+#[post("/<target>/messages/<msg>/unpin")]
+pub async fn message_unpin(
+    db: &State<Database>,
+    user: User,
+    target: Reference,
+    msg: Reference,
+) -> Result<EmptyResponse> {
+    let channel = target.as_channel(db).await?;
+
+    let mut query = DatabasePermissionQuery::new(db, &user).channel(&channel);
+    calculate_channel_permissions(&mut query)
+        .await
+        .throw_if_lacking_channel_permission(ChannelPermission::ManageMessages)?;
+
+    let mut message = msg.as_message_in_channel(db, &channel.id()).await?;
+
+    if !message.pinned.unwrap_or_default() {
+        return Err(create_error!(NotPinned))
+    }
+
+    message.update(db, PartialMessage {
+        pinned: Some(false),
+        ..Default::default()
+    }).await?;
+
+    Ok(EmptyResponse)
+}