kontor-echo: setup project to show homepage

kontor-echo/internal/handlers/mail.go

@@ -0,0 +1,30 @@
+package handlers
+
+import (
+	"kontor-api-echo/internal/models"
+	"kontor-api-echo/internal/repository"
+	"kontor-api-echo/internal/service"
+	"net/http"
+
+	"github.com/labstack/echo/v5"
+	"github.com/uptrace/bun"
+)
+
+type MailHandler struct {
+	Service *service.MailService
+}
+
+func NewMailHandler(db *bun.DB) *MailHandler {
+	handler := &MailHandler{Service: service.NewMailService(repository.NewMailRepository(db))}
+	return handler
+}
+
+func (handler *MailHandler) List(c *echo.Context) {
+	mails, err := handler.Service.List(c.Request().Context())
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, map[string]any{"error": err.Error()})
+		return
+	}
+	dtos := models.ConvertMailsToDtos(mails)
+	c.JSON(http.StatusOK, dtos)
+}