lib/strategy.js
/**
* Module dependencies.
*/
var util = require('util')
, OAuth2Strategy = require('passport-oauth2')
, Profile = require('./profile')
, InternalOAuthError = require('passport-oauth2').InternalOAuthError;
/**
* `Strategy` constructor.
*
* The Trakt authentication strategy authenticates requests by delegating to
* Trakt using the OAuth 2.0 protocol.
*
* Applications must supply a `verify` callback which accepts an `accessToken`,
* `refreshToken` and service-specific `profile`, and then calls the `done`
* callback supplying a `user`, which should be set to `false` if the
* credentials are not valid. If an exception occured, `err` should be set.
*
* Options:
* - `clientID` your Trakt application's Client ID
* - `clientSecret` your Trakt application's Client Secret
* - `callbackURL` URL to which Trakt will redirect the user after granting authorization
*
* Examples:
*
* passport.use(new TraktStrategy({
* clientID: '123-456-789',
* clientSecret: 'shhh-its-a-secret'
* callbackURL: 'https://www.example.net/auth/trakt/callback'
* },
* function(accessToken, refreshToken, params, profile, done) {
* User.findOrCreate(..., function (err, user) {
* done(err, user);
* });
* }
* ));
*
* @param {Object} options
* @param {Function} verify
* @api public
*/
function Strategy(options, verify) {
options = options || {};
options.authorizationURL = options.authorizationURL || 'https://api.trakt.tv/oauth/authorize';
options.tokenURL = options.tokenURL || 'https://api.trakt.tv/oauth/token';
options.customHeaders = options.customHeaders || {};
if (!options.customHeaders['trakt-api-version']) {
options.customHeaders['trakt-api-version'] = options.traktApiVersion || '2';
}
if (!options.customHeaders['trakt-api-key']) {
options.customHeaders['trakt-api-key'] = options.traktApiKey || options.clientID;
}
OAuth2Strategy.call(this, options, verify);
this.name = 'trakt';
this._userProfileURL = options.userProfileURL || 'https://api.trakt.tv/users/me';
this._oauth2.useAuthorizationHeaderforGET(true);
}
/**
* Inherit from `OAuth2Strategy`.
*/
util.inherits(Strategy, OAuth2Strategy);
/**
* Retrieve user profile from Trakt.
*
* This function constructs a normalized profile, with the following properties:
*
* - `provider` always set to `trakt`
* - `id` the user's Trakt ID
* - `username` the user's Trakt username
*
* @param {String} accessToken
* @param {Function} done
* @api protected
*/
Strategy.prototype.userProfile = function(accessToken, done) {
this._oauth2.get(this._userProfileURL, accessToken, function (err, body, res) {
var json;
if (err) {
return done(new InternalOAuthError('Failed to fetch user profile', err));
}
try {
json = JSON.parse(body);
} catch (ex) {
return done(new Error('Failed to parse user profile'));
}
var profile = Profile.parse(json);
profile.provider = 'trakt';
profile._raw = body;
profile._json = json;
done(null, profile);
});
};
/**
* Expose `Strategy`.
*/
module.exports = Strategy;