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<?php /* "Contact Form to Database" Copyright (C) 2011-2012 Michael Simpson (email : michael.d.simpson@gmail.com) This file is part of Contact Form to Database. Contact Form to Database is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Contact Form to Database is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Contact Form to Database. If not, see <http://www.gnu.org/licenses/>. / require_once('CF7DBOptionsManager.php'); /* * The methods in this class are used to track whether or not the plugin has been installed. * It writes a value in options to indicate that this plugin is installed. * * @author Michael Simpson / abstract class CF7DBInstallIndicator extends CF7DBOptionsManager { const optionInstalled = '_installed'; const optionVersion = '_version'; /* * @return bool indicating if the plugin is installed already / public function isInstalled() { return $this->getOption(self::optionInstalled) == true; } /* * Note in DB that the plugin is installed * @return null / protected function markAsInstalled() { return $this->updateOption(self::optionInstalled, true); } /* * Note in DB that the plugin is uninstalled * @return bool returned form delete_option. * true implies the plugin was installed at the time of this call, * false implies it was not. / protected function markAsUnInstalled() { return $this->deleteOption(self::optionInstalled); } /* * Set a version string in the options. This is useful if you install upgrade and * need to check if an older version was installed to see if you need to do certain * upgrade housekeeping (e.g. changes to DB schema). * @return string\|null value of the version / protected function getVersionSaved() { return $this->getOption(self::optionVersion); } /* * Set a version string in the options. * need to check if * @param $version string best practice: use a dot-delimited string like '1.2.3' so version strings can be easily * compared using version_compare (http://php.net/manual/en/function.version-compare.php) * @return null / protected function setVersionSaved($version) { return $this->updateOption(self::optionVersion, $version); } /* * @abstract * @return string name of the main plugin file that has the header section with * "Plugin Name", "Version", "Description", "Text Domain", etc. / protected abstract function getMainPluginFileName(); /* * Get a value for input key in the header section of main plugin file. * E.g. "Plugin Name", "Version", "Description", "Text Domain", etc. * @param $key string header value name * @return string if found, otherwise null / public function getPluginHeaderValue($key) { // Read the string from the comment header of the main plugin file $data = file_get_contents($this->getPluginDir() . DIRECTORY_SEPARATOR . $this->getMainPluginFileName()); $match = array(); preg_match('/' . $key . ':\s(\S+)/', $data, $match); if (count($match) >= 1) { return $match[1]; } return null; } /** * If your subclass of this class lives in a different directory, * override this method with the exact same code. Since __FILE__ will * be different, you will then get the right dir returned. * @return string / protected function getPluginDir() { return dirname(__FILE__); } /* * Version of this code. * Best practice: define version strings to be easily compared using version_compare() * (http://php.net/manual/en/function.version-compare.php) * NOTE: You should manually make this match the SVN tag for your main plugin file 'Version' release and 'Stable tag' in readme.txt * @return string / public function getVersion() { return $this->getPluginHeaderValue('Version'); } /* * Useful when checking for upgrades, can tell if the currently installed version is earlier than the * newly installed code. This case indicates that an upgrade has been installed and this is the first time it * has been activated, so any upgrade actions should be taken. * @return bool true if the version saved in the options is earlier than the version declared in getVersion(). * true indicates that new code is installed and this is the first time it is activated, so upgrade actions * should be taken. Assumes that version string comparable by version_compare, examples: '1', '1.1', '1.1.1', '2.0', etc. / public function isInstalledCodeAnUpgrade() { return $this->isSavedVersionLessThan($this->getVersion()); } /* * Used to see if the installed code is an earlier version than the input version * @param $aVersion string * @return bool true if the saved version is earlier (by natural order) than the input version / public function isSavedVersionLessThan($aVersion) { return $this->isVersionLessThan($this->getVersionSaved(), $aVersion); } /* * Used to see if the installed code is the same or earlier than the input version. * Useful when checking for an upgrade. If you haven't specified the number of the newer version yet, * but the last version (installed) was 2.3 (for example) you could check if * For example, $this->isSavedVersionLessThanEqual('2.3') == true indicates that the saved version is not upgraded * past 2.3 yet and therefore you would perform some appropriate upgrade action. * @param $aVersion string * @return bool true if the saved version is earlier (by natural order) than the input version / public function isSavedVersionLessThanEqual($aVersion) { return $this->isVersionLessThanEqual($this->getVersionSaved(), $aVersion); } /* * @param $version1 string a version string such as '1', '1.1', '1.1.1', '2.0', etc. * @param $version2 string a version string such as '1', '1.1', '1.1.1', '2.0', etc. * @return bool true if version_compare of $versions1 and $version2 shows $version1 as the same or earlier / public function isVersionLessThanEqual($version1, $version2) { return (version_compare($version1, $version2) <= 0); } /* * @param $version1 string a version string such as '1', '1.1', '1.1.1', '2.0', etc. * @param $version2 string a version string such as '1', '1.1', '1.1.1', '2.0', etc. * @return bool true if version_compare of $versions1 and $version2 shows $version1 as earlier / public function isVersionLessThan($version1, $version2) { return (version_compare($version1, $version2) < 0); } /* * Record the installed version to options. * This helps track was version is installed so when an upgrade is installed, it should call this when finished * upgrading to record the new current version * @param $version string optional version string. If not set, uses $this->getVersion() * @return void */ protected function saveInstalledVersion($version = null) { if (!$version) { $version = $this->getVersion(); } if ($version) { $this->setVersionSaved($version); } } }