feature(manager): skeleton for worker-manager communication

internal/msg.go

@@ -0,0 +1,42 @@
+package internal
+
+import "time"
+
+// A StatusUpdateMsg represents a msg when
+// a worker has done syncing
+type StatusUpdateMsg struct {
+	Name       string     `json:"name"`
+	Worker     string     `json:"worker"`
+	IsMaster   bool       `json:"is_master"`
+	Status     SyncStatus `json:"status"`
+	LastUpdate time.Time  `json:"last_update"`
+	Upstream   string     `json:"upstream"`
+	Size       string     `json:"size"`
+}
+
+// A WorkerInfoMsg is
+type WorkerInfoMsg struct {
+	Name string `json:"name"`
+}
+
+type CmdVerb uint8
+
+const (
+	CmdStart   CmdVerb = iota
+	CmdStop            // stop syncing keep the job
+	CmdDisable         // disable the job (stops goroutine)
+	CmdRestart         // restart syncing
+	CmdPing            // ensure the goroutine is alive
+)
+
+type WorkerCmd struct {
+	Cmd  CmdVerb  `json:"cmd"`
+	Args []string `json:"args"`
+}
+
+type ClientCmd struct {
+	Cmd      CmdVerb  `json:"cmd"`
+	MirrorID string   `json:"mirror_id"`
+	WorkerID string   `json:"worker_id"`
+	Args     []string `json:"args"`
+}