From 7f4504c47e9058e2a7d15810700599ea910b9e61 Mon Sep 17 00:00:00 2001
From: Maxim Lebedev <mail@toby3d.ru>
Date: Tue, 5 Sep 2017 13:51:43 +0500
Subject: [PATCH] :sparkles: Added sendInvoice method

---
 send_invoice.go | 82 +++++++++++++++++++++++++++++++++++++++++++++++++
 telegram.go     |  4 +--
 2 files changed, 84 insertions(+), 2 deletions(-)
 create mode 100644 send_invoice.go

diff --git a/send_invoice.go b/send_invoice.go
new file mode 100644
index 0000000..ed65cdf
--- /dev/null
+++ b/send_invoice.go
@@ -0,0 +1,82 @@
+package telegram
+
+import json "github.com/pquerna/ffjson/ffjson"
+
+type SendInvoiceParameters struct {
+	// Unique identifier for the target private chat
+	ChatID int64 `json:"chat_id"` // required
+
+	// Product name, 1-32 characters
+	Title string `json:"title"` // required
+
+	// Product description, 1-255 characters
+	Description string `json:"description"` // required
+
+	// Bot-defined invoice payload, 1-128 bytes. This will not be displayed to the user, use for your internal processes.
+	Payload string `json:"payload"` // required
+
+	// Payments provider token, obtained via Botfather
+	ProviderToken string `json:"provider_token"` // required
+
+	// Unique deep-linking parameter that can be used to generate this invoice when used as a start parameter
+	StartParameter string `json:"start_parameter"` // required
+
+	// Three-letter ISO 4217 currency code, see more on currencies
+	Currency string `json:"currency"` // required
+
+	// Price breakdown, a list of components (e.g. product price, tax, discount, delivery cost, delivery tax, bonus, etc.)
+	Prices []*LabeledPrice `json:"prices"` // required
+
+	// URL of the product photo for the invoice. Can be a photo of the goods or a marketing image for a service. People like it better when they see what they are paying for.
+	PhotoURL string `json:"photo_url"` // optional
+
+	// Photo size
+	PhotoSize int `json:"photo_size"` // optional
+
+	// Photo width
+	PhotoWidth int `json:"photo_width"` // optional
+
+	// Photo height
+	PhotoHeight int `json:"photo_height"` // optional
+
+	// Pass True, if you require the user's full name to complete the order
+	NeedName bool `json:"need_name"` // optional
+
+	// Pass True, if you require the user's phone number to complete the order
+	NeedPhoneNumber bool `json:"need_phone_number"` // optional
+
+	// Pass True, if you require the user's email to complete the order
+	NeedEmail bool `json:"need_email"` // optional
+
+	// Pass True, if you require the user's shipping address to complete the order
+	NeedShippingAddress bool `json:"need_shipping_address"` // optional
+
+	// Pass True, if the final price depends on the shipping method
+	IsFlexible bool `json:"is_flexible"` // optional
+
+	// Sends the message silently. Users will receive a notification with no sound.
+	DisableNotification bool `json:"disable_notification"` // optional
+
+	// If the message is a reply, ID of the original message
+	ReplyToMessageID int `json:"reply_to_message_id"` // optional
+
+	// A JSON-serialized object for an inline keyboard. If empty, one 'Pay total price' button will be shown. If not empty, the first button must be a Pay button.
+	ReplyMarkup *InlineKeyboardMarkup `json:"reply_markup"` // optional
+}
+
+// SendInvoice send invoices. On success, the sent Message is returned.
+func (bot *Bot) SendInvoice(params *SendInvoiceParameters) (*Message, error) {
+	dst, err := json.Marshal(*params)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := bot.request(dst, "sendInvoice", nil)
+	if err != nil {
+		return false, err
+	}
+
+	var data Message
+	err = json.Unmarshal(*resp.Result, &data)
+	return &data, err
+}
diff --git a/telegram.go b/telegram.go
index febf49d..7335c79 100644
--- a/telegram.go
+++ b/telegram.go
@@ -26,9 +26,9 @@ func NewBot(accessToken string) *Bot {
 	return &Bot{accessToken}
 }
 
-func (bot *Bot) request(method string, args *http.Args) (*Response, error) {
+func (bot *Bot) request(dst []byte, method string, args *http.Args) (*Response, error) {
 	method = fmt.Sprintf(APIEndpoint, bot.AccessToken, method)
-	_, body, err := http.Post(nil, method, args)
+	_, body, err := http.Post(dst, method, args)
 	if err != nil {
 		return nil, err
 	}