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service.go
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service.go
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package wirepusher
import (
"fmt"
"net/http"
"net/url"
"github.com/pkg/errors"
)
const (
AES_KEY_SIZE int = 16 // WirePusher uses AES-128 for encryption
ClearSingleMessage = "wirepusher_clear_notification"
ClearAllMessages = "wirepusher_clear_all_notifications"
baseURL = "https://wirepusher.com/send"
)
// WirePusher service definition
type Service struct {
client *http.Client
}
// New returns a new WirePusher service with the http DefaultClient
func New() *Service {
return &Service{client: http.DefaultClient}
}
// NewWithClient returns a new WirePusher service with a custom http.Client
func NewWithClient(client *http.Client) *Service {
return &Service{client: client}
}
// Send the message. If the provided user has a password, the message title and body will be encrypted
func (s *Service) Send(msg *Message, user *User) error {
var (
iv []byte
title string
body string
err error
)
if user.CanEncrypt() {
iv, err = randomIV()
if err != nil {
return errors.Wrap(err, "error retrieving random iv during Send")
}
key, err := hex2bin(user.Password())
if err != nil {
return errors.Wrap(err, "error reading password of user during Send")
}
title, err = encrypt(msg.Title, iv, key)
if err != nil {
return errors.Wrap(err, "error encrypting title during Send")
}
body, err = encrypt(msg.Body, iv, key)
if err != nil {
return errors.Wrap(err, "error encrypting body during Send")
}
} else {
title = msg.Title
body = msg.Body
}
link := fmt.Sprintf("%s?id=%s&title=%s&message=%s&type=%s", baseURL, user.ID, url.QueryEscape(title), url.QueryEscape(body), msg.Type)
if user.CanEncrypt() {
link += fmt.Sprintf("&iv=%s", url.QueryEscape(bin2hex(iv)))
}
if msg.ID != 0 {
link += fmt.Sprintf("&message_id=%d", msg.ID)
}
if len(msg.ActionURL) > 0 {
link += fmt.Sprintf("&action=%s", msg.ActionURL)
}
if len(msg.ImageURL) > 0 {
link += fmt.Sprintf("&image_url=%s", msg.ImageURL)
}
resp, err := s.client.Get(link)
if err != nil {
return errors.Wrapf(err, "error sending message with url %q", link)
}
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("unexpected http response code for url %q: %s", link, resp.Status)
}
return nil
}
// ClearMsg clears the message with the specified id from the notification tray of the specified user
func (s *Service) ClearMsg(msgid int, user *User) error {
url := fmt.Sprintf("%s?id=%s&type=%s&message_id=%d", baseURL, user.ID, ClearSingleMessage, msgid)
resp, err := s.client.Get(url)
if err != nil {
return errors.Wrapf(err, "error sending clear msg message with url %q", url)
}
if resp.StatusCode != 200 {
return fmt.Errorf("unexpected http response code for url %q: %s", url, resp.Status)
}
return nil
}
// ClearAllMsg clears all messages from the notification tray of the specified user
func (s *Service) ClearAllMsg(user *User) error {
url := fmt.Sprintf("%s?id=%s&type=%s", baseURL, user.ID, ClearAllMessages)
resp, err := s.client.Get(url)
if err != nil {
return errors.Wrapf(err, "error sending clear all msg message with url %q", url)
}
if resp.StatusCode != 200 {
return fmt.Errorf("unexpected http response code for url %q: %s", url, resp.Status)
}
return nil
}