feat: add frontend + backend + database to retrieve and compute news from Yahoo

backend/internal/httputil/response.go

@@ -0,0 +1,48 @@
+package httputil
+
+import (
+	"net/http"
+	"reflect"
+
+	"github.com/gin-gonic/gin"
+)
+
+// nilToEmpty converts nil slices to empty slices so JSON serializes as [] not null
+func nilToEmpty(data interface{}) interface{} {
+	if data == nil {
+		return data
+	}
+	v := reflect.ValueOf(data)
+	if v.Kind() == reflect.Slice && v.IsNil() {
+		return reflect.MakeSlice(v.Type(), 0, 0).Interface()
+	}
+	return data
+}
+
+func OK(c *gin.Context, data interface{}) {
+	c.JSON(http.StatusOK, gin.H{"data": nilToEmpty(data)})
+}
+
+func Created(c *gin.Context, data interface{}) {
+	c.JSON(http.StatusCreated, gin.H{"data": nilToEmpty(data)})
+}
+
+func NoContent(c *gin.Context) {
+	c.Status(http.StatusNoContent)
+}
+
+func BadRequest(c *gin.Context, err error) {
+	c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+}
+
+func Unauthorized(c *gin.Context) {
+	c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+}
+
+func NotFound(c *gin.Context) {
+	c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+}
+
+func InternalError(c *gin.Context, err error) {
+	c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+}