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<?php |
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namespace smtech\CanvasICSSync\SyncIntoCanvas; |
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use PDO; |
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use smtech\CanvasPest\CanvasPest; |
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/** |
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* A syncable object |
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* |
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* @author Seth Battis <[email protected]> |
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*/ |
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abstract class Syncable |
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{ |
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/** |
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* Database connection |
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* |
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* @var PDO|null |
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*/ |
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protected static $database; |
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/** |
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* Canvas API connection |
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* |
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* @var CanvasPest|null |
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*/ |
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protected static $api; |
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/** |
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* Unique timestamp for the current sync |
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* @var string |
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*/ |
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protected static $syncTimestamp; |
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/** |
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* Generate a unique identifier for this synchronization pass |
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**/ |
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public static function getSyncTimestamp() |
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{ |
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if (empty(static::$syncTimestamp)) { |
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$timestamp = new DateTime(); |
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static::$syncTimestamp = |
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$timestamp->format(Constants::SYNC_TIMESTAMP_FORMAT) . |
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Constants::SEPARATOR . md5( |
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(php_sapi_name() == 'cli' ? |
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'cli' : $_SERVER['REMOTE_ADDR'] |
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) . time() |
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); |
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} |
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return static::$syncTimestamp; |
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} |
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/** |
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* Update the MySQL connection |
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* |
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* @param PDO $db |
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* @throws Exception If `$db` is null |
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*/ |
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public static function setDatabase(PDO $database) |
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{ |
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if (empty($database)) { |
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throw new Exception( |
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'A non-null database connection is required' |
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); |
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} else { |
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static::$database = $database; |
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} |
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} |
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/** |
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* Get the MySQL connection |
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* |
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* @return mysqli |
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*/ |
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public static function getDatabase() |
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{ |
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return static::$db; |
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} |
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/** |
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* Update the API connection |
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* |
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* @param CanvasPest $api |
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* @throws Exception if `$api` is null |
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*/ |
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public static function setApi(CanvasPest $api) |
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{ |
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if (empty($api)) { |
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throw new Exception( |
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'A non-null API connection is required' |
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); |
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} else { |
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static::$api = $api; |
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} |
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} |
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/** |
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* Get the API connection |
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* |
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* @return CanvasPest|null |
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*/ |
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public static function getApi() |
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{ |
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return static::$api; |
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} |
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/** |
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* Save the syncable object to the MySQL database |
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* |
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* @return [type] [description] |
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*/ |
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abstract public function save(); |
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/** |
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* Load a syncable object from the MySQL database |
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* |
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* @param int $id |
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* @return Syncable|null |
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*/ |
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abstract public static function load($id); |
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} |
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Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: