restructure application, add get endpoint

internal/application/application.go

@@ -0,0 +1,22 @@
+package application
+
+import (
+	"vegan-barcode/internal/database"
+	"vegan-barcode/internal/utils"
+
+	"github.com/sirupsen/logrus"
+)
+
+type Application struct {
+	db  database.Database
+	log *logrus.Logger
+}
+
+func Start() {
+	application := Application{
+		db:  database.InitializeDatabase(),
+		log: utils.InitializeLogger(),
+	}
+
+	application.bindRoutes()
+}

internal/application/handlers.go

@@ -0,0 +1,19 @@
+package application
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+func (a *Application) GetClaimsHandler(c *gin.Context) {
+	system := c.DefaultQuery("system", "upc")
+	barcode := c.Query("barcode")
+
+	productClaims, err := a.GetClaims(system, barcode)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, nil)
+		return
+	}
+	c.JSON(http.StatusOK, productClaims)
+}

internal/application/routes.go

@@ -0,0 +1,17 @@
+package application
+
+import (
+	"github.com/gin-gonic/gin"
+)
+
+func (application *Application) bindRoutes() {
+
+	router := gin.Default()
+
+	router.Group("/claims")
+	{
+		router.GET("/:barcode", application.GetClaimsHandler)
+	}
+
+	router.Run("localhost:8080")
+}

internal/application/services.go

@@ -0,0 +1,19 @@
+package application
+
+import (
+	"vegan-barcode/internal/models"
+)
+
+func (a *Application) GetClaims(system string, barcode string) (*models.ProductClaims, error) {
+	id, err := a.db.FindProductIDByBarcode(system, barcode)
+	if err != nil {
+		return nil, err
+	}
+
+	claims, err := a.db.FindClaimsByProductID(id)
+	if err != nil {
+		return nil, err
+	}
+
+	return &models.ProductClaims{Id: id, Claims: claims}, nil
+}