head-management: add infrastructure

src/ifs/head_management/jay_head_v1.rs

@@ -0,0 +1,55 @@
+use {
+    super::HeadCommon,
+    crate::{
+        client::{Client, ClientError},
+        ifs::head_management::HeadCommonError,
+        leaks::Tracker,
+        object::{Object, Version},
+        wire::{JayHeadV1Id, jay_head_v1::*},
+    },
+    std::rc::Rc,
+    thiserror::Error,
+};
+
+pub(super) struct JayHeadV1 {
+    pub(super) id: JayHeadV1Id,
+    pub(super) client: Rc<Client>,
+    pub(super) tracker: Tracker<Self>,
+    pub(super) version: Version,
+    pub(super) common: Rc<HeadCommon>,
+}
+
+impl JayHeadV1 {
+    pub(super) fn send_removed(&self) {
+        self.common.removed.set(true);
+        self.client.event(Removed { self_id: self.id });
+    }
+}
+
+impl JayHeadV1RequestHandler for JayHeadV1 {
+    type Error = JayHeadV1Error;
+
+    fn destroy(&self, _req: Destroy, _slf: &Rc<Self>) -> Result<(), Self::Error> {
+        self.common.assert_removed()?;
+        self.client.remove_obj(self)?;
+        Ok(())
+    }
+}
+
+object_base! {
+    self = JayHeadV1;
+    version = self.version;
+}
+
+impl Object for JayHeadV1 {}
+
+simple_add_obj!(JayHeadV1);
+
+#[derive(Debug, Error)]
+pub enum JayHeadV1Error {
+    #[error(transparent)]
+    ClientError(Box<ClientError>),
+    #[error(transparent)]
+    Common(#[from] HeadCommonError),
+}
+efrom!(JayHeadV1Error, ClientError);