feat(core): add external auth entity lookup endpoint

Author: BK1031

core/api/api.go

@@ -45,6 +45,8 @@ func InitializeRoutes(router *gin.Engine) {
 	router.POST("/core/token/validate", ValidateToken)
 	router.DELETE("/core/token/:id", RevokeToken)
 
+	router.GET("/core/entity/external/:provider/:externalID", GetEntityByExternalAuth)
+
 	router.GET("/users", GetAllUsers)
 	router.GET("/users/:id", GetUserByID)
 	router.POST("/users", CreateOrUpdateUser)

core/api/entity.go

@@ -0,0 +1,24 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/gaucho-racing/sentinel/core/service"
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+func GetEntityByExternalAuth(c *gin.Context) {
+	provider := c.Param("provider")
+	externalID := c.Param("externalID")
+	entity, err := service.GetEntityByExternalAuth(provider, externalID)
+	if err != nil {
+		if err == gorm.ErrRecordNotFound {
+			c.JSON(http.StatusNotFound, gin.H{"error": "entity not found"})
+			return
+		}
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, entity)
+}

core/service/entity.go

@@ -96,6 +96,14 @@ func CreatePhoneAuthForEntity(entityID string, phoneNumber string) (model.Entity
 	return auth, nil
 }
 
+func GetEntityByExternalAuth(provider string, externalID string) (model.Entity, error) {
+	var auth model.EntityExternalAuth
+	if err := database.DB.Where("provider = ? AND external_id = ?", provider, externalID).First(&auth).Error; err != nil {
+		return model.Entity{}, err
+	}
+	return GetEntityByID(auth.EntityID)
+}
+
 func GetExternalAuthForEntity(entityID string) ([]model.EntityExternalAuth, error) {
 	auths := []model.EntityExternalAuth{}
 	if err := database.DB.Where("entity_id = ?", entityID).Find(&auths).Error; err != nil {