Fitbit client

An OAuth 2.0 client to consume Fitbit's API.

WARNING: Every release should be usable and stable, but it is a Work in Progress until all Fitbit's API is covered.

Usage

Token object

Every method of the API needs a valid token object with these properties:

• access_token: a valid user's access token.
• refresh_token: the user's refresh token. Optional for every call except refreshAccessToken()
• expires_in: expiration time in seconds. Optional.

Using an existing user token

    var FitbitClient = require('fitbit-client-oauth2');
    
    var client = new FitbitClient(<YOUR_FITBIT_API_KEY>, <YOUR_FITBIT_API_SECRET> );
    
    // retrieve previously saved user's token from db or somewhere
    var tokens = existingUser.fitbitTokens;
    
    var options = { /* TIME_SERIES_OPTIONS */ };
    
    client.getTimeSeries(tokens, options)
        .then(function(res) {
            console.log('results: ', res);
        }).catch(function(err) {
            console.log('error getting user data', err);
        });

Refreshing an expired user token

    client.refreshAccessToken(tokens)
        .then(function(new_token) {
            // save new_token data to db
            // then do more stuff here.
        
        }).catch(function(err) {
          console.log('error refreshing user token', err);
        });

Get an access token

If you need to start an OAuth flow to get user's permission and access_token, you need to redirect to Fitbit's OAuth endpoint.

NOTE: You can also use passport-fitbit-oauth2 instead of doing this manually.

    var client = new FitbitClient(<YOUR_FITBIT_API_KEY>, <YOUR_FITBIT_API_SECRET>);
    var redirect_uri = 'http://redirect_uri_used_in_fitbit_app_website';
    var scope =  [ 'activity', 'nutrition', 'profile', 'settings', 'sleep', 'social', 'weight' ];
    
    server.get('/auth/fitbit', function(req, res, next) {
    
        var authorization_uri = client.getAuthorizationUrl(redirect_uri, scope);
        
        res.redirect(authorization_uri);
    });
    
    // If /auth/fitbit/callbac is your redirec_uri
    
    server.get('/auth/fitbit/callback', function(req, res, next) {
    
        var code = req.query.code;
        
        client.getToken(code, redirect_uri)
            .then(function(token) {

                // ... save your token on db or session... 
                
                // then redirect
                res.redirect(302, '/user');

            })
            .catch(function(err) {
                // something went wrong.
                res.send(500, err);
            
            });
    
    });
    

TODO

• Implement full OAuth authorization code flow. (use it on Connect servers with passport-fitbit-oauth2).
• Cover more of the Fitbit API endpoints
• Add token expiration event to the client (EventEmitter).
• Implement automatic retries on token expiration errors

Other implementations

This package exists because Fitbit's newest endpoints works only with OAuth 2.0 and all other existing packages works only with OAuth 1.0. Some examples:

• fitbit-node
• fitbit-js
• node-fitbit