initial commit

internal/pkg/oauth/provider.go

@@ -0,0 +1,51 @@
+package oauth
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+//go:generate stringer -type=Provider
+type Provider int
+
+const (
+	Unknown Provider = iota
+	Credentials
+	Google
+	GitHub
+	Linkedin
+	Mock
+)
+
+// UnmarshalJSON implements json.Unmarshaler so Provider accepts string in JSON (e.g. "mock", "google")
+func (p *Provider) UnmarshalJSON(data []byte) error {
+	var s string
+	if err := json.Unmarshal(data, &s); err != nil {
+		return err
+	}
+	parsed, err := ParseProvider(s)
+	if err != nil {
+		return err
+	}
+	*p = parsed
+	return nil
+}
+
+// ParseProvider parses a provider string and returns the corresponding Provider enum
+func ParseProvider(provider string) (Provider, error) {
+	switch strings.ToLower(provider) {
+	case "credentials":
+		return Credentials, nil
+	case "google":
+		return Google, nil
+	case "github":
+		return GitHub, nil
+	case "linkedin":
+		return Linkedin, nil
+	case "mock":
+		return Mock, nil
+	default:
+		return Unknown, fmt.Errorf("unknown provider: %s", provider)
+	}
+}