add missing models

kontor-gin/internal/handlers/book_author.go

@@ -0,0 +1,30 @@
+package handlers
+
+import (
+	"kontor-api-gin/internal/models"
+	"kontor-api-gin/internal/repository"
+	"kontor-api-gin/internal/service"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+type BookAuthorHandler struct {
+	Service *service.BookAuthorService
+}
+
+func NewBookAuthorHandler(db *gorm.DB) *BookAuthorHandler {
+	handler := &BookAuthorHandler{Service: service.NewBookAuthorService(repository.NewBookAuthorRepository(db))}
+	return handler
+}
+
+func (handler *BookAuthorHandler) List(c *gin.Context) {
+	authors, err := handler.Service.List(c.Request.Context())
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	dtos := models.ConvertBookAuthorsToDtos(authors)
+	c.JSON(http.StatusOK, dtos)
+}