Create models and modify the handler to take a struct

internal/models/models.go

@@ -0,0 +1,34 @@
+package models
+
+import (
+	"database/sql"
+	"time"
+)
+
+// DBModel is the type for database connection values
+type DBModel struct {
+	DB *sql.DB
+}
+
+// Models is the wrapper for all models
+type Models struct {
+	DB DBModel
+}
+
+// NewModels returns a model type with database connection pool
+func NewModels(db *sql.DB) Models {
+	return Models{
+		DB: DBModel{DB: db},
+	}
+}
+
+// Widget is the type for all widgets
+type Widget struct {
+	ID             int       `json:"id"`
+	Name           string    `json:"name"`
+	Description    string    `json:"description"`
+	InventoryLevel int       `json:"inventory_level"`
+	Price          int       `json:"price"`
+	CreatedAt      time.Time `json:"-"`
+	UpdatedAt      time.Time `json:"-"`
+}