move x/internal/ctx to x/ctx

ctx/value.go

@@ -0,0 +1,76 @@
+package ctx
+
+import "context"
+
+// clientAddrKey saves the client address.
+type clientAddrKey struct{}
+
+type ClientAddr string
+
+var (
+	keyClientAddr clientAddrKey
+)
+
+func ContextWithClientAddr(ctx context.Context, addr ClientAddr) context.Context {
+	return context.WithValue(ctx, keyClientAddr, addr)
+}
+
+func ClientAddrFromContext(ctx context.Context) ClientAddr {
+	v, _ := ctx.Value(keyClientAddr).(ClientAddr)
+	return v
+}
+
+// sidKey saves the session ID.
+type sidKey struct{}
+type Sid string
+
+var (
+	keySid sidKey
+)
+
+func ContextWithSid(ctx context.Context, sid Sid) context.Context {
+	return context.WithValue(ctx, keySid, sid)
+}
+
+func SidFromContext(ctx context.Context) Sid {
+	v, _ := ctx.Value(keySid).(Sid)
+	return v
+}
+
+// hashKey saves the hash source for Selector.
+type hashKey struct{}
+
+type Hash struct {
+	Source string
+}
+
+var (
+	clientHashKey = &hashKey{}
+)
+
+func ContextWithHash(ctx context.Context, hash *Hash) context.Context {
+	return context.WithValue(ctx, clientHashKey, hash)
+}
+
+func HashFromContext(ctx context.Context) *Hash {
+	if v, _ := ctx.Value(clientHashKey).(*Hash); v != nil {
+		return v
+	}
+	return nil
+}
+
+type clientIDKey struct{}
+type ClientID string
+
+var (
+	keyClientID = &clientIDKey{}
+)
+
+func ContextWithClientID(ctx context.Context, clientID ClientID) context.Context {
+	return context.WithValue(ctx, keyClientID, clientID)
+}
+
+func ClientIDFromContext(ctx context.Context) ClientID {
+	v, _ := ctx.Value(keyClientID).(ClientID)
+	return v
+}