Slack Provider for OAuth 2.0 Client

This package provides Slack OAuth 2.0 support for the PHP League's OAuth 2.0 Client.

Installation

To install, use composer:

$ composer require adam-paterson/oauth2-slack

Usage

Usage is the same as The League's OAuth client, using \AdamPaterson\OAuth2\Client\Provider\Slack as the provider.

Authorization Code Flow

<?php

session_start();
 
$provider = new \AdamPaterson\OAuth2\Client\Provider\Slack([
    'clientId'          => '{slack-client-id}',
    'clientSecret'      => '{slack-client-secret}',
    'redirectUri'       => 'https://example.com/callback-url',
]);
 
if (!isset($_GET['code'])) {
 
    // If we don't have an authorization code then get one
    $authUrl = $provider->getAuthorizationUrl();
    $_SESSION['oauth2state'] = $provider->getState();
    header('Location: '.$authUrl);
    exit;
  
// Check given state against previously stored one to mitigate CSRF attack
} elseif (empty($_GET['state']) || ($_GET['state'] !== $_SESSION['oauth2state'])) {
 
    unset($_SESSION['oauth2state']);
    exit('Invalid state');
 
} else {
    // Try to get an access token (using the authorization code grant)
    $token = $provider->getAccessToken('authorization_code', [
        'code' => $_GET['code']
    ]);
 
    // Optional: Now you have a token you can look up a users profile data
    try {
 
        // We got an access token, let's now get the user's details
        $team = $provider->getResourceOwner($token);
 
        // Use these details to create a new profile
        printf('Hello %s!', $team->getName());
 
    } catch (Exception $e) {
 
        // Failed to get user details
        exit('Oh dear...');
    }
 
    // Use this to interact with an API on the users behalf
    echo $token->getToken();
}

Scopes

OAuth scopes, indicating which parts of the Slack user's account you'd like your app to be able to access. The complete list of scopes can be found here.

$provider = new \AdamPaterson\OAuth2\Client\Provider\Slack([
   'clientId'          => '{slack-client-id}',
   'clientSecret'      => '{slack-client-secret}',
   'redirectUri'       => 'https://example.com/callback-url',
]);
   
$authUrl = $provider->$provider->getAuthorizationUrl([
   'scope' => 'user:read user:write file:write'
]);

Bot Access Tokens

If your Slack app includes a bot user, upon approval the JSON response will contain an additional node containing an access token to be specifically used for your bot user, within the context of the approving workspace.

Note: You must pass the bot scope for this additional node to be present

$authUrl = $provider->$provider->getAuthorizationUrl([
    'scope' => 'bot'
]);  
 
$token = $provider->getAccessToken('authorization_code', [
    'code' => $_GET['code']
]);
 
$values = $token->getValues();
 
// bot user id
$botUserId = $values['bot']['bot_user_id'];
$botAccessToken = $values['bot']['bot_access_token'];

Testing

$ ./vendor/bin/phpunit

newvladimirov/oauth2-slack