diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Context.php | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/src/Context.php b/src/Context.php index b3bf4a0..7f937dc 100644 --- a/src/Context.php +++ b/src/Context.php @@ -422,13 +422,59 @@ abstract class Context $context = self::$contextPrefix . $context; } if (!class_exists($context)) { - throw new \Exception('Specified context ("' . $context . '") does not exist.'); + throw new \Exception( + 'Specified context ("' . $context . '") does not exist.' + ); } self::$loadedContext = $context; self::$KEYWORDS = $context::$KEYWORDS; } /** + * Loads the context with the closest version to the one specified. + * + * The closest context is found by replacing last digits with zero until one + * is loaded succesfully. + * + * @see Context::load() + * + * @param string $context Name of the context or full class name that + * defines the context. + * + * @return string The loaded context. `null` if no context was loaded. + */ + public static function loadClosest($context = '') + { + /** + * The number of replaces done by `preg_replace`. + * This actually represents whether a new context was generated or not. + * @var int + */ + $count = 0; + + // As long as a new context can be generated, we try to laod it. + do { + $loaded = true; + try { + // Trying to load the new context. + static::load($context); + } catch (\Exception $e) { + // If it didn't work, we are looking for a new one and skipping + // over to the next generation that will try the new context. + $context = preg_replace( + '/[1-9](0*)$/', '0$1', $context, -1, $count + ); + continue; + } + // Last generated context was valid (did not throw any exceptions). + // So we return it, to let the user know what context was loaded. + return $context; + } while ($count !== 0); + + return null; + } + + /** * Sets the SQL mode. * * @param string $mode The list of modes. If empty, the mode is reset. |