[golang] implement ship refueling

golang/pkg/agent/agent.go

@@ -0,0 +1,26 @@
+package agent
+
+import (
+	"sync"
+
+	"git.adyxax.org/adyxax/spacetraders/golang/pkg/model"
+)
+
+type Agent struct {
+	data  *model.Agent
+	mutex sync.Mutex
+}
+
+var agent Agent
+
+func GetAgent() *model.Agent {
+	agent.mutex.Lock()
+	defer agent.mutex.Unlock()
+	return agent.data
+}
+
+func SetAgent(data *model.Agent) {
+	agent.mutex.Lock()
+	defer agent.mutex.Unlock()
+	agent.data = data
+}