Added Gitea oauth to the admin dashboard and finished the oauth handling

internal/web/handlers/oauth.go

@@ -11,22 +11,31 @@ import (
 
 type OauthLoginHandler struct {
 	Jwt               auth.JwtTokenGenerator
-	OauthLoginHandler auth.GiteaOAuth2Handler
+	OauthLoginHandler *auth.GiteaOAuth2Handler
 }
 
 var OauthLoginHandlerInstance *OauthLoginHandler
 
 func InitOauthLoginHandler() {
 	OauthLoginHandlerInstance = &OauthLoginHandler{
-		Jwt: *auth.JwtTokenGeneratorInstance,
+		Jwt:               *auth.JwtTokenGeneratorInstance,
+		OauthLoginHandler: auth.GiteaOauth2HandlerInstance,
 	}
 }
 
-func (_ *OauthLoginHandler) GoToGiteaLogin(c *gin.Context) {
-	c.Redirect(http.StatusFound, auth.GiteaOauth2HandlerInstance.GetGiteaLoginURL(c.Request.Host))
+func (olh *OauthLoginHandler) GoToGiteaLogin(c *gin.Context) {
+	redirectURL, _ := olh.OauthLoginHandler.GetGiteaLoginURL(c.Request.URL.Scheme + c.Request.Host)
+	if redirectURL != "" {
+		c.Redirect(http.StatusFound, redirectURL)
+		return
+	}
+
+	c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to get gitea login url"})
+
 }
 
 func (olh *OauthLoginHandler) LoginWithGitea(c *gin.Context) {
+
 	var input dto.GiteaLoginInput
 	if err := c.ShouldBindJSON(&input); err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})