Add additional scope for facebook

[pcofilada]

Add additional scope #71

• user_friends
• user_location
• user_website

[adamjmcgrath]

Thanks for your PR, the scope change looks good, but I would prefer the fields to be customisable as well. In your PR, the default fields aren't available with the default scope.

You could pass custom fields on to the identity function the same way the Google provider passes the appId https://github.com/adamjmcgrath/react-native-simple-auth/blob/master/lib/providers/google.js#L53

eg. something like this (untested)

const FIELDS = [
  'id',
  'name',
  'first_name',
  'last_name',
  'verified',
  'email',
  'location',
  'link',
];

export const authorize = (
  { dance, request },
  { appId, callback, scope = SCOPE, fields = FIELDS },
) => pipeP(
  dance,
  replace('#', '?'),
  fromQueryString,
  set(lensProp('credentials'), __, {}),
  merge({ fields }),
)(authorizationUrl(AUTH, appId, callback, scope));

export const identify = curry((request, { credentials, fields }) => pipeP(
  partial(request, [`${ME}&access_token=${credentials.access_token}&fields=${fields.join(',')}`, {}]),
  invoker(0, 'json'),
  set(lensProp('user'), __, {}),
  set(lensProp('credentials'), credentials),
)());

[adamjmcgrath]

"you can override the default scope here"

[pcofilada]

@adamjmcgrath I already updated this PR.