Merge pull request #47 from jjideenschmiede/development

feat: Add new function for variant prices.

README.md

@@ -364,6 +364,35 @@ if err != nil {
 }
 ```
 
+## Update a product variant price
+
+If you want to update the price of a product variant, you can do so using the following function.
+
+```go
+// Define request
+r := goshopify.Request{
+    StoreName:   "",
+    AccessToken: "",
+}
+
+// Define body
+body := ProductVariantPriceBody{
+    ProductVariantPriceBodyVariant{
+        Id:                  6917353078968,
+        Price:               "24,99",
+        CompareAtPrice:      "48,99",
+    },
+}
+
+// Update variant price
+variantPrice, err := goshopify.UpdateProductVariantPrice(body, r)
+if err != nil {
+    fmt.Println(err)
+} else {
+    fmt.Println(variantPrice)
+}
+```
+
 ## Get a list of metafields for a product variant
 
 If you want to read out all metafields of a product variant, you can do this as follows. 

product_variants.go

@@ -99,6 +99,17 @@ type ProductVariantReturn struct {
 	Errors interface{} `json:"errors,omitempty"`
 }
 
+// ProductVariantPriceBody is to structure the data
+type ProductVariantPriceBody struct {
+	Variant ProductVariantPriceBodyVariant `json:"variant"`
+}
+
+type ProductVariantPriceBodyVariant struct {
+	Id             int    `json:"id"`
+	Price          string `json:"price"`
+	CompareAtPrice string `json:"compare_at_price,omitempty"`
+}
+
 // ProductVariantMetafieldsReturn is to decode the json data
 type ProductVariantMetafieldsReturn struct {
 	Metafields []struct {
@@ -233,6 +244,40 @@ func DeleteVariant(productId, variantId int, r Request) error {
 
 }
 
+// UpdateProductVariantPrice is to update the inventory quantity of a product variant
+func UpdateProductVariantPrice(body ProductVariantPriceBody, r Request) (ProductVariantReturn, error) {
+
+	// Convert body
+	convert, err := json.Marshal(body)
+	if err != nil {
+		return ProductVariantReturn{}, err
+	}
+
+	// Set config for new request
+	c := Config{fmt.Sprintf("/variants/%d.json", body.Variant.Id), http.MethodPut, convert}
+
+	// Send request
+	response, err := c.Send(r)
+	if err != nil {
+		return ProductVariantReturn{}, err
+	}
+
+	// Close request
+	defer response.Body.Close()
+
+	// Decode data
+	var decode ProductVariantReturn
+
+	err = json.NewDecoder(response.Body).Decode(&decode)
+	if err != nil {
+		return ProductVariantReturn{}, err
+	}
+
+	// Return data
+	return decode, err
+
+}
+
 // ProductVariantMetafields is to get a list of all product variant metafields
 func ProductVariantMetafields(productId, variantId int, r Request) (ProductVariantMetafieldsReturn, error) {