Send a Viber message with failover

In this example you will send a Viber message that fails over to sending an SMS. In the Workflow object, message objects can be placed in any order to suit your use case. Each message object must contain a failover object, except for the last message, as there are no more message objects to failover to.

Example

Ensure the following variables are set to your required values using any convenient method:

Key Description
NEXMO_APPLICATION_ID The ID of the application that you created.
FROM_NUMBER The phone number you are sending the message from.
TO_NUMBER The phone number you are sending the message to.
VIBER_SERVICE_MESSAGE_ID Your Viber Service Message ID.

NOTE: Don't use a leading + or 00 when entering a phone number, start with the country code, for example 447700900000.

Prerequisites

Create an application

Write the code

Add the following to send-viber-message-with-failover.sh:

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curl -X POST https://api.nexmo.com/v0.1/dispatch \
  -H 'Authorization: Bearer '$JWT\
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json' \
  -d $'{
    "template":"failover",
    "workflow": [
      {
        "from": { "type": "viber_service_msg", "id": '$VIBER_SERVICE_MESSAGE_ID' },
        "to": { "type": "viber_service_message", "id": '$TO_NUMBER' },
        "message": {
          "content": {
            "type": "text",
            "text": "This is a Viber Message sent via the Dispatch API"
          }
        },
        "failover":{
          "expiry_time": 600,
          "condition_status": "read"
        }
      },
      {
        "from": {"type": "sms", "number": '$FROM_NUMBER'},
        "to": { "type": "sms", "number": '$TO_NUMBER'},
        "message": {
          "content": {
            "type": "text",
            "text": "This is an SMS sent via the Dispatch API"
          }
        }
      }
    ]
  }'

View full source 

Run your code

Save this file to your machine and run it:

$ bash send-viber-message-with-failover.sh

Prerequisites

Create an application

Write the code

Add the following to app.js:

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const Nexmo = require('nexmo')

const nexmo = new Nexmo({
  apiKey: NEXMO_API_KEY,
  apiSecret: NEXMO_API_SECRET,
  applicationId: NEXMO_APPLICATION_ID,
  privateKey: NEXMO_APPLICATION_PRIVATE_KEY_PATH
})

nexmo.dispatch.create("failover", [
  {
    "from": { "type": "viber_service_msg", "id": "VIBER_SERVICE_MESSAGE_ID"},
    "to": { "type": "viber_service_msg", "number": "TO_NUMBER"},
    "message": {
      "content": {
        "type": "text",
        "text": "This is a Viber Service Message sent from the Dispatch API"
      }
    },
    "failover":{
      "expiry_time": 600,
      "condition_status": "delivered"
    }
  },
  {
    "from": {"type": "sms", "number": "FROM_NUMBER"},
    "to": { "type": "sms", "number": "TO_NUMBER"},
    "message": {
      "content": {
        "type": "text",
        "text": "This is an SMS sent from the Dispatch API"
      }
    }
  },
  (err, data) => { console.log(data.dispatch_uuid); }
])

View full source 

Run your code

Save this file to your machine and run it:

$ node app.js

Try it out

When you run the code it will attempt to send a message via Viber. This will fail and then a message will be sent via SMS to the destination number.