1: <?php
 2: 
 3: namespace Authoritarian\Flow;
 4: 
 5: use Authoritarian\Credential\ClientCredential;
 6: use Authoritarian\Exception\Flow\MissingTokenUrlException;
 7: use Authoritarian\Exception\Flow\MissingClientCredentialException;
 8: 
 9: /**
10:  *  Authorization Flow interface to generate Access Token Requests
11:  */
12: abstract class AbstractFlow
13: {
14:     protected $client;
15:     protected $tokenUrl;
16:     protected $clientId;
17:     protected $clientSecret;
18:     protected $scope;
19: 
20:     /**
21:      * @param \Guzzle\Http\ClientInterface $client
22:      */
23:     public function setHttpClient(\Guzzle\Http\ClientInterface $client)
24:     {
25:         $this->client = $client;
26:     }
27: 
28:     /**
29:      * @param string $token_url The URL to request the Access Token
30:      */
31:     public function setTokenUrl($token_url)
32:     {
33:         $this->tokenUrl = $token_url;
34:     }
35: 
36:     /**
37:      * @param string $client_id     The app's client id
38:      * @param string $client_secret The app's client secret
39:      */
40:     public function setClientCredential($client_id, $client_secret)
41:     {
42:         $this->clientId = $client_id;
43:         $this->clientSecret = $client_secret;
44:     }
45: 
46:     /**
47:      * @param string $scope The scope the app is requiring access
48:      */
49:     public function setScope($scope)
50:     {
51:         $this->scope = $scope;
52:     }
53: 
54:     /**
55:      * Get the request to the Access Token
56:      *
57:      * @throws MissingTokenUrlException When the OAuth token URL wasn't set
58:      * @throws MissingClientCredentialException When the app's client
59:      * credentials wasn't set
60:      *
61:      * @return \Guzzle\Http\Message\RequestInterface
62:      */
63:     public function getRequest() {
64:         if (is_null($this->tokenUrl)) {
65:             throw new MissingTokenUrlException(
66:                 'No OAuth token URL given to generate a request'
67:             );
68:         }
69: 
70:         if (is_null($this->clientId) || is_null($this->clientSecret)) {
71:             throw new MissingClientCredentialException(
72:                 'No Client Id or Client Secret given to generate a request'
73:             );
74:         }
75:     }
76: 
77:     protected function removeNullItems(array $parameters)
78:     {
79:         return array_filter(
80:             $parameters,
81:             function ($item) {
82:                 return !is_null($item);
83:             }
84:         );
85:     }
86: }
87: 
88: