feat(push): ring incoming calls on Apple PushKit devices (#2911)

fluxer_push/src/job.rs

@@ -5,6 +5,7 @@ use thiserror::Error;
 
 pub const SUBJECT_MESSAGE: &str = "push.job.message";
 pub const SUBJECT_CLEAR: &str = "push.job.clear";
+pub const SUBJECT_RING: &str = "push.job.ring";
 pub const QUEUE_GROUP: &str = "fluxer-push";
 
 const SUPPORTED_VERSION: u8 = 1;
@@ -43,6 +44,17 @@ pub struct ClearJob {
     pub message_id: String,
 }
 
+#[derive(Clone, Debug, Deserialize, Eq, PartialEq)]
+pub struct RingJob {
+    pub v: u8,
+    pub config_version: u64,
+    pub user_id: String,
+    pub channel_id: String,
+    pub message_id: String,
+    pub started_at_ms: i64,
+    pub expires_at_ms: i64,
+}
+
 #[derive(Debug, Error)]
 pub enum JobError {
     #[error("push job version {0} is not supported")]
@@ -69,6 +81,12 @@ pub fn decode_clear(bytes: &[u8]) -> Result<ClearJob, JobError> {
     Ok(job)
 }
 
+pub fn decode_ring(bytes: &[u8]) -> Result<RingJob, JobError> {
+    let job: RingJob = serde_json::from_slice(bytes)?;
+    supported(job.v)?;
+    Ok(job)
+}
+
 fn supported(version: u8) -> Result<(), JobError> {
     if version == SUPPORTED_VERSION {
         return Ok(());