Official Roam Javascript SDK

A Javascript library for Roam Location and Events Subscription. It is used to subscribe to user's locations and events at project level or location of a single user.

roam-js supports subscription to the following location and events data:
- Specific user
- All users of a group
- All users of project

Note: Before you get started signup to our dashboard to get your Publishable Keys.

Installation:

Via NPM

You can install our package using npm.
``
npm install roam-js
`

Via CDN

roam-js bundle is available through http://unpkg.com, specifically at https://unpkg.com/roam-js/dist/roam.min.js. See http://unpkg.com for the full documentation on version ranges.

Usage

You can think this library as a wrapper around our REST API which needs your Publishable Key for authorization and it works as per project level. It is fairly simple to use:
- Initialize() the package with the publishable key. This will return an instance of our client.
- Define your custom callback function. client.setCallback(fn)
- Create an instance of subscription. You can create subscription for project, user or group of users using the following methods on client:
- Location Subscriptions:
+ projectSubscription() takes no parameters
+ groupSubscription(greoupID) - takes in group ID as parameter
+ userSubscription(userID) - takes in a single user ID or a array of user ids as parameter
- Events Subscription:
+ projectEventsSubscription() takes no parameters
+ groupEventsSubscription(greoupID) - takes in group ID as parameter
+ userEventsSubscription(userID) - takes in a single user ID or a array of user ids as parameter
- Use subscribe() method on the created subscription to start receiving realtime location data
- To stop receiving data, call unsubscribe method.
- To disconnect() call disconnect method on client.
Please find the example usage below:
`
var roam = require("roam-js")

const pk = process.env.roam_pk;

roam.Initialize(pk)
.then((client)=>{
client.setCallback(function(message, messageType, userID){console.log(message, messageType, userID)})

client.projectSubscription()
.then((subscription)=>{
subscription.subscribe()
.then((msg)=>{
console.log(msg)
subscription.unsubscribe()
.then((msg)=>{
console.log(msg)
client.disconnect().then((msg)=>{
console.log(msg)
})
})
.catch((err)=>{
console.log(err)
})
}
)
})
.catch((err)=>{
console.log(err)
})

})
.catch((err)=>{
console.log(err)
})
`

Methods

Initialize

First order of process is initialization of the library.
Initialize function takes in publishable key as parameter. You can get the publishable key from our dashboard once you have created a project.
Initialize returns a promise of our client.

`
client = await roam.Initialize("")
`

Setting up callback function


Once initialized, we recommend setting up a callback function. This callback function will be called once you receive any data from our backend. We provide 3 parameters for callback function in the following order
1. message : Actual message sent from the server
2. messageType: locations or events message type
3. userID: the userID to which the location or event belongs.
`
var callback = function(message, messageType, userID){
console.log(message, messageType, userID)
}
client.setCallback(callback)
`

Subscription

roam-js supports 3 types of subscriptions:
- project subscription
- user subscription
- group subscription
- project events subscription
- user events subscription
- group events subscription

$3

To create a subscription that allow you to subscribe to location data of all users within the project, you can use projectSubscription() method of client. It does not take in any parameter.
`
subscription = await client.projectSubscription()
`

$3

To create a subscription that allow you to subscribe to location data of all users within the group, you can use groupSubscription(groupID) method of client. It takes group ID as parameter.
`
subscription = await client.groupSubscription('')
`

$3

To create a subscription that allow you to subscribe to location data a user or multiple usesrs, you can use userSubscription(user_1) method of client. It takes user ID as parameter.
`
subscription = await client.userSubscription('user_1')
`
To subscribe to multiple users pass in user ids in an array as parameter
`
subscription = await client.userSubscription(['user_1','user_2'])
`

$3

To create a subscription that allow you to subscribe to location data of all users within the project, you can use projectEventsSubscription() method of client. It does not take in any parameter.
`
subscription = await client.projectEventsSubscription()
`

$3

To create a subscription that allow you to subscribe to location data of all users within the group, you can use groupEventsSubscription(groupID) method of client. It takes group ID as parameter.
`
subscription = await client.groupEventsSubscription('')
`

$3

To create a subscription that allow you to subscribe to location data a user or multiple usesrs, you can use userEventsSubscription(groupID) method of client. It takes user ID as parameter.
`
subscription = await client.userEventsSubscription('user_1')
`
To subscribe to multiple users pass in user ids in an array as parameter
`
subscription = await client.userEventsSubscription(['user_1','user_2'])
`

$3

All of the above methods will give you an subscription promise. You can subscribe to the subscription by using the following:
`
subscription.subscribe()
`
This will return a promise with a message whether subscription was subscribed successfully or throws an error.

$3

To stop getting location updates from a subscription you can use ubsubscribe method.
`
subscription.unsubscribe()
`
This will return a promise with a message whether unsubscribe was subscribed successfully or throws an error.

Disconnect

To disconnect from our server, call disconnect method on the client.
`
client.disconnect()
`

Example

See example codes in examples/.
To run the example, clone this repository, add your sdk key as environment veriable pk` and run the app.

Need Help?

If you have any problems or issues over our SDK, feel free to create a github issue or submit a request on Roam Help.