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<?php |
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/** |
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* Copyright 2017 Facebook, Inc. |
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* |
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* You are hereby granted a non-exclusive, worldwide, royalty-free license to |
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* use, copy, modify, and distribute this software in source code or binary |
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* form for use in connection with the web services and APIs provided by |
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* Facebook. |
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* |
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* As with any software that integrates with the Facebook platform, your use |
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* of this software is subject to the Facebook Developer Principles and |
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* Policies [http://developers.facebook.com/policy/]. This copyright notice |
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* shall be included in all copies or substantial portions of the software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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* DEALINGS IN THE SOFTWARE. |
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*/ |
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namespace Facebook\Authentication; |
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use DateTimeInterface; |
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use Exception; |
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use Facebook\Exception\SDKException; |
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/** |
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* Represents metadata from an access token. |
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* |
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* @package Facebook |
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* |
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* @see https://developers.facebook.com/docs/graph-api/reference/debug_token |
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*/ |
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class AccessTokenMetadata |
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{ |
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/** |
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* The access token metadata. |
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* |
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* @var array |
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*/ |
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protected $metadata = []; |
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/** |
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* Properties that should be cast as DateTime objects. |
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* |
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* @var array |
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*/ |
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protected static $dateProperties = ['expires_at', 'issued_at']; |
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/** |
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* @param array $metadata |
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* |
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* @throws SDKException |
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*/ |
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public function __construct(array $metadata) |
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{ |
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if (!isset($metadata['data'])) { |
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throw new SDKException('Unexpected debug token response data.', 401); |
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} |
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$this->metadata = $metadata['data']; |
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$this->castTimestampsToDateTimeInterface(); |
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} |
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/** |
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* Returns a value from the metadata. |
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* |
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* @param string $field the property to retrieve |
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* @param mixed $default the default to return if the property doesn't exist |
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* |
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* @return mixed |
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*/ |
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public function getField($field, $default = null) |
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{ |
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if (isset($this->metadata[$field])) { |
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return $this->metadata[$field]; |
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} |
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return $default; |
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} |
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/** |
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* Returns a value from a child property in the metadata. |
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* |
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* @param string $parentField the parent property |
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* @param string $field the property to retrieve |
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* @param mixed $default the default to return if the property doesn't exist |
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* |
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* @return mixed |
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*/ |
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public function getChildProperty($parentField, $field, $default = null) |
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{ |
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if (!isset($this->metadata[$parentField])) { |
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return $default; |
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} |
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if (!isset($this->metadata[$parentField][$field])) { |
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return $default; |
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} |
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return $this->metadata[$parentField][$field]; |
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} |
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/** |
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* Returns a value from the error metadata. |
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* |
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* @param string $field the property to retrieve |
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* @param mixed $default the default to return if the property doesn't exist |
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* |
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* @return mixed |
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*/ |
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public function getErrorProperty($field, $default = null) |
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{ |
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return $this->getChildProperty('error', $field, $default); |
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} |
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/** |
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* Returns a value from the "metadata" metadata. *Brain explodes*. |
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* |
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* @param string $field the property to retrieve |
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* @param mixed $default the default to return if the property doesn't exist |
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* |
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* @return mixed |
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*/ |
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public function getMetadataProperty($field, $default = null) |
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{ |
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return $this->getChildProperty('metadata', $field, $default); |
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} |
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/** |
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* The ID of the application this access token is for. |
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* |
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* @return null|string |
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*/ |
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public function getAppId() |
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{ |
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return $this->getField('app_id'); |
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} |
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/** |
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* Name of the application this access token is for. |
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* |
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* @return null|string |
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*/ |
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public function getApplication() |
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{ |
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return $this->getField('application'); |
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} |
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/** |
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* Any error that a request to the graph api |
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* would return due to the access token. |
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* |
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* @return null|bool |
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*/ |
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public function isError() |
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{ |
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return $this->getField('error') !== null; |
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} |
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/** |
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* The error code for the error. |
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* |
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* @return null|int |
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*/ |
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public function getErrorCode() |
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{ |
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return $this->getErrorProperty('code'); |
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} |
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/** |
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* The error message for the error. |
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* |
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* @return null|string |
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*/ |
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public function getErrorMessage() |
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{ |
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return $this->getErrorProperty('message'); |
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} |
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/** |
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* The error subcode for the error. |
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* |
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* @return null|int |
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*/ |
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public function getErrorSubcode() |
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{ |
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return $this->getErrorProperty('subcode'); |
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} |
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/** |
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* DateTime when this access token expires. |
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* |
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* @return null|DateTimeInterface |
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*/ |
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public function getExpiresAt() |
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{ |
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return $this->getField('expires_at'); |
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} |
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/** |
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* Whether the access token is still valid or not. |
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* |
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* @return null|bool |
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*/ |
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public function getIsValid() |
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{ |
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return $this->getField('is_valid'); |
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} |
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/** |
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* DateTime when this access token was issued. |
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* |
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* Note that the issued_at field is not returned |
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* for short-lived access tokens. |
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* |
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* @see https://developers.facebook.com/docs/facebook-login/access-tokens#debug |
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* |
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* @return null|DateTimeInterface |
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*/ |
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public function getIssuedAt() |
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{ |
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return $this->getField('issued_at'); |
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} |
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/** |
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* General metadata associated with the access token. |
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* Can contain data like 'sso', 'auth_type', 'auth_nonce'. |
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* |
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* @return null|array |
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*/ |
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public function getMetadata() |
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{ |
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return $this->getField('metadata'); |
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} |
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/** |
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* The 'sso' child property from the 'metadata' parent property. |
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* |
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* @return null|string |
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*/ |
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public function getSso() |
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{ |
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return $this->getMetadataProperty('sso'); |
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} |
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/** |
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* The 'auth_type' child property from the 'metadata' parent property. |
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* |
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* @return null|string |
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*/ |
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public function getAuthType() |
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{ |
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return $this->getMetadataProperty('auth_type'); |
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} |
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/** |
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* The 'auth_nonce' child property from the 'metadata' parent property. |
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* |
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* @return null|string |
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*/ |
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public function getAuthNonce() |
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{ |
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return $this->getMetadataProperty('auth_nonce'); |
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} |
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/** |
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* For impersonated access tokens, the ID of |
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* the page this token contains. |
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* |
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* @return null|string |
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*/ |
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public function getProfileId() |
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{ |
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return $this->getField('profile_id'); |
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} |
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/** |
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* List of permissions that the user has granted for |
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* the app in this access token. |
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* |
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* @return array |
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*/ |
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public function getScopes() |
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{ |
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return $this->getField('scopes'); |
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} |
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/** |
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* The ID of the user this access token is for. |
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* |
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* @return null|string |
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*/ |
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public function getUserId() |
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{ |
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return $this->getField('user_id'); |
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} |
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/** |
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* Ensures the app ID from the access token |
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* metadata is what we expect. |
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* |
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* @param string $appId |
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* |
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* @throws SDKException |
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*/ |
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public function validateAppId($appId) |
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{ |
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if ($this->getAppId() !== $appId) { |
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throw new SDKException('Access token metadata contains unexpected app ID.', 401); |
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} |
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} |
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/** |
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* Ensures the user ID from the access token |
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* metadata is what we expect. |
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* |
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* @param string $userId |
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* |
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* @throws SDKException |
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*/ |
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public function validateUserId($userId) |
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{ |
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if ($this->getUserId() !== $userId) { |
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throw new SDKException('Access token metadata contains unexpected user ID.', 401); |
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} |
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} |
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/** |
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* Ensures the access token has not expired yet. |
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* |
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* @throws SDKException |
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*/ |
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public function validateExpiration() |
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{ |
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if (!$this->getExpiresAt() instanceof \DateTime) { |
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return; |
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} |
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if ($this->getExpiresAt()->getTimestamp() < time()) { |
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throw new SDKException('Inspection of access token metadata shows that the access token has expired.', 401); |
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} |
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} |
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/** |
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* Converts a unix timestamp into a DateTime entity. |
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* |
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* @param int $timestamp |
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* |
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* @return DateTimeInterface |
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* @throws Exception |
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*/ |
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private function convertTimestampToDateTimeInterface($timestamp) |
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{ |
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$dt = new \DateTimeImmutable(); |
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$dt->setTimestamp($timestamp); |
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return $dt; |
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} |
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/** |
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* Casts the unix timestamps as DateTimeInterface entities. |
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* @throws Exception |
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*/ |
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private function castTimestampsToDateTimeInterface() |
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{ |
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foreach (static::$dateProperties as $key) { |
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if (isset($this->metadata[$key]) && $this->metadata[$key] !== 0) { |
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$this->metadata[$key] = $this->convertTimestampToDateTimeInterface($this->metadata[$key]); |
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} |
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} |
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} |
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} |
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