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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,75 @@ | ||
| # Viber | ||
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| ## Prerequisites | ||
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| ### Create a Viber Bot | ||
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| In order to use the Viber notification service, we'll need to create a new Viber bot [here](https://partners.viber.com/account/create-bot-account). | ||
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| ### Setting the webhook | ||
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| After we have done with the bot setup, we'll need to have a webhook that will be used to receive callbacks from the Viber server otherwise we will not be able to send a message. | ||
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| Please note that your webhook needs to be valid otherwise it will not work properly. You can read more details about the Viber webhook [here](https://developers.viber.com/docs/api/rest-bot-api/#webhooks) and about the callback [here](https://developers.viber.com/docs/api/rest-bot-api/#callbacks). | ||
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| #### Tips: Easy setup for webhook | ||
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| If you need to set up webhook easily like for example only for local testing, you can utilize [Google App Scripts](https://www.google.com/script/start/) and create a simple Web app from it. Here is the example script: | ||
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| ```javascript | ||
| function doPost(e) { | ||
| const contents = JSON.parse(e.postData.contents) | ||
| Logger.log(JSON.stringify(contents)) | ||
| } | ||
| ``` | ||
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| _In short, it will just receive the POST request, and log the content_. | ||
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| Don't forget to deploy the script as a web app and share the access with anyone. | ||
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| You'll get a URL like https://script.google.com/macros/s/xxx/exec and this URL will be your webhook URL. | ||
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| ## Usage | ||
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| Here is an example use case on how you can use Viber: | ||
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| ```go | ||
| package main | ||
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| import ( | ||
| "context" | ||
| "log" | ||
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| "github.com/nikoksr/notify" | ||
| "github.com/nikoksr/notify/service/viber" | ||
| ) | ||
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| const appKey = "your-viber-token" | ||
| const webhookURL = "https://webhook.com" | ||
| const senderName = "vibersofyana" | ||
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| func main() { | ||
| viberSvc := viber.New(appKey, senderName, "") | ||
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| err := viberSvc.SetWebhook(webhookURL) // this only needs to be called once | ||
| if err != nil { | ||
| log.Fatalf("set webhook to viber server failed: %v", err) | ||
| } | ||
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| viberSvc.AddReceivers("receiver-viber-user-id") // can add as many as required | ||
| notifier := notify.New() | ||
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| notifier.UseServices(viberSvc) | ||
| if err := notifier.Send(context.Background(), "TEST", "Message using golang notifier library"); err != nil { | ||
| log.Fatalf("notifier.Send() failed: %s", err.Error()) | ||
| } | ||
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| log.Println("Notification sent") | ||
| } | ||
| ``` | ||
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| > ❗️**Viber is only allowing the bot to send the message to their subscriber**. Therefore, in order to send the notification, we need to make sure that the receiver already subscribed to the bot. Read more details here: https://developers.viber.com/docs/api/rest-bot-api/#send-message | ||
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| ## Attachment | ||
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| - [Viber API Documentation](https://developers.viber.com/docs/) |
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| Package viber provides a service for sending messages to viber. | ||
| Usage: | ||
| package main | ||
| import ( | ||
| "context" | ||
| "log" | ||
| "github.com/nikoksr/notify" | ||
| "github.com/nikoksr/notify/service/viber" | ||
| ) | ||
| const appKey = "your-viber-token" | ||
| const webhookURL = "https://webhook.com" | ||
| const senderName = "vibersofyana" | ||
| func main() { | ||
| viberSvc := viber.New(appKey, senderName, "") | ||
| err := viberSvc.SetWebhook(webhookURL) // this only needs to be called once | ||
| if err != nil { | ||
| log.Fatalf("set webhook to viber server failed: %v", err) | ||
| } | ||
| viberSvc.AddReceivers("receiver-viber-user-id") // can add as many as required | ||
| notifier := notify.New() | ||
| notifier.UseServices(viberSvc) | ||
| if err := notifier.Send(context.Background(), "TEST", "Message using golang notifier library"); err != nil { | ||
| log.Fatalf("notifier.Send() failed: %s", err.Error()) | ||
| } | ||
| log.Println("Notification sent") | ||
| } | ||
| */ | ||
| package viber |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,61 @@ | ||
| package viber | ||
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| import ( | ||
| "context" | ||
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| vb "github.com/mileusna/viber" | ||
| "github.com/pkg/errors" | ||
| ) | ||
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| //go:generate mockery --name=viberClient --output=. --case=underscore --inpackage | ||
| type viberClient interface { | ||
| SetWebhook(url string, eventTypes []string) (vb.WebhookResp, error) | ||
| SendTextMessage(receiver, msg string) (uint64, error) | ||
| } | ||
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| // Compile-time check to ensure that vb.Viber implements the viberClient interface. | ||
| var _ viberClient = new(vb.Viber) | ||
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| // Viber struct holds necessary fields to communicate with Viber API | ||
| type Viber struct { | ||
| Client viberClient | ||
| SubscribedUserIDs []string | ||
| } | ||
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| // New returns a new instance of Viber notification service | ||
| func New(appKey, senderName, senderAvatar string) *Viber { | ||
| return &Viber{ | ||
| Client: vb.New(appKey, senderName, senderAvatar), | ||
| SubscribedUserIDs: []string{}, | ||
| } | ||
| } | ||
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| // AddReceivers receives subscribed user IDs then add them to internal receivers list | ||
| func (v *Viber) AddReceivers(subscribedUserIDs ...string) { | ||
| v.SubscribedUserIDs = append(v.SubscribedUserIDs, subscribedUserIDs...) | ||
| } | ||
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| // SetWebhook receives a URL that will we used as a webhook URL for Viber | ||
| func (v *Viber) SetWebhook(webhookURL string) error { | ||
| _, err := v.Client.SetWebhook(webhookURL, []string{}) | ||
| return err | ||
| } | ||
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| // Send takes a message subject and a message body and sends them to all previously set userIds | ||
| func (v *Viber) Send(ctx context.Context, subject, message string) error { | ||
| fullMessage := subject + "\n" + message // Treating subject as message title | ||
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| for _, subscribedUserID := range v.SubscribedUserIDs { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return ctx.Err() | ||
| default: | ||
| _, err := v.Client.SendTextMessage(subscribedUserID, fullMessage) | ||
| if err != nil { | ||
| return errors.Wrapf(err, "failed to send message to User ID '%s'", subscribedUserID) | ||
| } | ||
| } | ||
| } | ||
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| return nil | ||
| } |
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