Oauth2 support

backend/internal/entity/setting/auth_methods.go

@@ -2,19 +2,31 @@ package setting
 
 import (
 	"encoding/json"
+	"slices"
 )
 
 // GetAuthMethods returns the authentication methods enabled for this site
 func GetAuthMethods() ([]string, error) {
-	var l []string
 	var m Model
 	if err := m.LoadByName("auth-methods"); err != nil {
-		return l, err
+		return nil, err
 	}
 
-	if err := json.Unmarshal([]byte(m.Value.String()), &l); err != nil {
-		return l, err
+	var r []string
+	if err := json.Unmarshal([]byte(m.Value.String()), &r); err != nil {
+		return nil, err
 	}
 
-	return l, nil
+	return r, nil
+}
+
+// AuthMethodEnabled checks that the auth method given is
+// enabled in the db setting
+func AuthMethodEnabled(method string) bool {
+	r, err := GetAuthMethods()
+	if err != nil {
+		return false
+	}
+
+	return slices.Contains(r, method)
 }

backend/internal/entity/setting/oauth.go

@@ -0,0 +1,42 @@
+package setting
+
+import (
+	"encoding/json"
+)
+
+// OAuthSettings are the settings for OAuth that come from
+// the `oauth-auth` setting value
+type OAuthSettings struct {
+	AutoCreateUser bool     `json:"auto_create_user"`
+	ClientID       string   `json:"client_id"`
+	ClientSecret   string   `json:"client_secret"`
+	AuthURL        string   `json:"authorization_url"`
+	TokenURL       string   `json:"token_url"`
+	Identifier     string   `json:"identifier"`
+	LogoutURL      string   `json:"logout_url"`
+	Scopes         []string `json:"scopes"`
+	ResourceURL    string   `json:"resource_url"`
+}
+
+// GetOAuthSettings will return the OAuth settings
+func GetOAuthSettings() (OAuthSettings, error) {
+	var o OAuthSettings
+	var m Model
+	if err := m.LoadByName("oauth-auth"); err != nil {
+		return o, err
+	}
+
+	if err := json.Unmarshal([]byte(m.Value.String()), &o); err != nil {
+		return o, err
+	}
+
+	o.ApplyDefaults()
+	return o, nil
+}
+
+// ApplyDefaults will ensure there are defaults set
+func (m *OAuthSettings) ApplyDefaults() {
+	if m.Identifier == "" {
+		m.Identifier = "email"
+	}
+}