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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                require_once __DIR__ . '/vendor/autoload.php';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use EUAutomation\GraphQL\Client;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                elgg_register_event_handler('init', 'system', 'paas_integration_init'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                function paas_integration_init() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    elgg_register_action("avatar/upload", elgg_get_plugins_path() . "paas_integration/actions/avatar/upload.php"); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    elgg_register_plugin_hook_handler("action", "b_extended_profile/edit_profile", "edit_profile_paas_mutation"); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    elgg_register_action('b_extended_profile/edit_profile', elgg_get_plugins_path() . 'paas_integration/actions/b_extended_profile/edit_profile.php'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Send modifyProfile mutation to PaaS  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                function edit_profile_paas_mutation($hook, $entity_type, $returnvalue, $params) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $guid = get_input('guid'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner = get_entity($guid);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $dbprefix = elgg_get_config("dbprefix"); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $service_url = elgg_get_plugin_setting("graphql_client", "paas_integration"); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $session = elgg_get_session();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $token = $session->get('token'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $result = get_data_row("SELECT pleio_guid FROM {$dbprefix}users_entity WHERE guid = $guid"); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    if ($result->pleio_guid) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $gcID = $result->pleio_guid;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $client = new Client($service_url);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $headers = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        "Authorization" => "Bearer $token"  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $query = 'mutation ($gcID: ID!, $data: ModifyProfileInput!) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        modifyProfile(gcID: $gcID, data: $data) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            gcID  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            name  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            email  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            titleEn  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            titleFr  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            avatar  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            mobilePhone  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            officePhone  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            address { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                streetAddress  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    53
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                                city  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    54
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                                postalCode  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    55
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                                province  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                country  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $profile_fields = get_input('profile'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $address = array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'streetAddress' => copy_value_to_object_if_defined($profile_fields['streetaddress']),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'city' => copy_value_to_object_if_defined($profile_fields['city']),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'province' => copy_value_to_object_if_defined($profile_fields['province']),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'postalCode' => copy_value_to_object_if_defined($profile_fields['postalcode']),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'country' => copy_value_to_object_if_defined($profile_fields['country']),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $variables = array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'gcID' => $gcID,  | 
            
                            
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                        'data' => array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'name' => $profile_fields['name'],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'titleEn' => copy_value_to_object_if_defined($profile_fields['job']),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'titleFr' => copy_value_to_object_if_defined($profile_fields['jobfr']),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'mobilePhone' => copy_value_to_object_if_defined($profile_fields['mobile']),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'officePhone' => copy_value_to_object_if_defined($profile_fields['phone']),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'address' => address_validation($address),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        )  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    // Send data to PaaS  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $response = $client->response($query, $variables, $headers);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    // Error check  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    if($response->errors()){ | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    // Contact details  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner->name = $response->modifyProfile->name;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner->job = $response->modifyProfile->titleEn;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner->jobfr = $response->modifyProfile->titleFr;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner->mobile = $response->modifyProfile->mobilePhone;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner->phone = $response->modifyProfile->officePhone;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    // Address details  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner->streetaddress = $response->modifyProfile->address->streetAddress;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    100
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                    $owner->city = $response->modifyProfile->address->city;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner->province = $response->modifyProfile->address->province;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner->postalcode = $response->modifyProfile->address->postalCode;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner->country = $response->modifyProfile->address->country;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $owner->save();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    107
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                    // Mutation has gone through  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    108
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                    return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    109
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                  }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    111
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                  // Set value to null if not set  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    112
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                  function copy_value_to_object_if_defined($value){ | 
            
            
                                                                        
                            
            
                                    
            
            
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                    113
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                    if($value != null && $value != "undefined"){ | 
            
            
                                                                        
                            
            
                                    
            
            
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                    114
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                        return $value;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    115
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                    } else { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    116
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                        return null;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    117
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    118
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                  }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    119
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                    120
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                  // Set array to null if all fields are null  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    121
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                  function address_validation($address) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    122
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                    123
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                    foreach($address as $k => $v ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    124
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                        if($v != null) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    125
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                            return $address;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    126
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    127
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    128
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                    129
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                    return null;  | 
            
            
                                                        
            
                                    
            
            
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                    130
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                  }  | 
            
            
                        
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: