mexp-keyring-user-creds.php

<?php
/*
Plugin Name: MEXP Keyring Credentials
Description: MEXP Keyring Credentials
Version:     1.0
Author:      Michael Blouin, Automattic
Author URI:  http://automattic.com

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

*/

add_filter( 'mexp_instagram_user_credentials', 'mexp_instagram_user_credentials_callback' );

function mexp_instagram_user_credentials_callback( $credentials ) {
	
	if ( ! class_exists( 'Keyring') ) {
		return $credentials;
	}

	// Check that the instagram service is setup
	$keyring = Keyring::init()->get_service_by_name( 'instagram' );
	if ( is_null( $keyring ) ) {
		return $credentials;
	}
	
	$keyring_store = Keyring::init()->get_token_store();
	
	// Hacky time, Keyring is designed to handle requests, but we're just stealing its access_token.
	if ( method_exists( $keyring_store, 'get_tokens_by_user' ) ) {
		
		// The wpcom version uses the get_tokens_by_user method
		$users_tokens = $keyring_store->get_tokens_by_user( get_current_user_id() );
		
		if ( in_array( 'instagram', $users_tokens ) ) {
			$credentials['access_token'] = $users_tokens['instagram'][0]->token;
		}
		
	} elseif ( method_exists( $keyring_store, 'get_tokens' ) ) {
		
		// The released version uses the get_tokens method
		$users_tokens = $keyring_store->get_tokens(
				array(
					'service' => 'instagram',
					'user_id' => get_current_user_id(),
				)
			);
		
		if ( count( $users_tokens ) > 0 ) {
			$credentials['access_token'] = $users_tokens[0]->token;
		}
		
	}
	
	return $credentials;

}