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Filename : autoupdate.php
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<?php
/**
 * Check to see if the plugin file path matches the main pro plugin or an add-on of ours
 *
 * @param $plugin_file
 *
 * @return bool
 */
function userfeedback_is_plugin_our_addon( $plugin_file ) {
	if ( ! userfeedback_is_pro_version() ) {
		return false;
	}

	$addons_data = userfeedback_get_addons();

	if ( ! is_array( $addons_data ) ) {
		return false;
	}

	foreach ( $addons_data as $type => $addons ) {
		foreach ( $addons as $addon ) {
			$slug     = 'userfeedback-' . $addon->slug;
			$basename = userfeedback_get_plugin_basename_from_slug( $slug );

			if ( $plugin_file === $basename ) {
				return true;
			}
		}
	}

	return false;
}

/**
 * Add Manage Auto-updates link for MI pro and its add-ons on Plugins page
 *
 * @param $html
 * @param $plugin_file
 *
 * @return string
 */
function userfeedback_modify_wordpress_autoupdater_setting( $html, $plugin_file, $plugin_data ) {
	$is_pro         = userfeedback_is_pro_version();
	$is_addon       = userfeedback_is_plugin_our_addon( $plugin_file );
	$is_main_free   = isset( $plugin_data['slug'] ) && 'userfeedback-pro' === $plugin_data['slug'];
	$is_main_pro    = $is_pro && plugin_basename( USERFEEDBACK_PLUGIN_FILE ) === $plugin_file;
	$has_permission = current_user_can( 'userfeedback_save_settings' );

	if ( $is_addon && ! $is_pro ) {
		$html = sprintf(
			'<a target="_blank" href="%s">%s</a>',
			userfeedback_get_url(
				'plugins-autoupdate',
				'upgrade-to-autoupdate',
				'https://www.userfeedback.com/docs/go-lite-pro'
			),
			__( 'Enable the UserFeedback PRO plugin to manage auto-updates', 'userfeedback' )
		);
		add_filter( "userfeedback_is_autoupdate_setting_html_filtered_{$plugin_file}", '__return_true' );
	} elseif ( $has_permission &&
			   ( $is_main_free || $is_main_pro || ( $is_addon && $is_pro ) )
	) {
		$text  = __( 'Manage auto-updates', 'userfeedback' );
		$html .= '<br>' . sprintf( '<a href="%s"">%s</a>', admin_url( 'admin.php?page=userfeedback_settings#/misc' ), $text );
		add_filter( "userfeedback_is_autoupdate_setting_html_filtered_{$plugin_file}", '__return_true' );
	}

	return $html;
}

add_filter( 'plugin_auto_update_setting_html', 'userfeedback_modify_wordpress_autoupdater_setting', 10, 3 );

/**
 * Filters the auto update plugin routine to allow UserFeedback to be
 * automatically updated.
 *
 * This function is hooked into `auto_update_plugin`. This hook is used in
 * two places:
 *   - Automatic plugin update routine.
 *   - Display the enabled / disabled state on Plugins page.
 *
 * When used in the context of automatic plugin update, this function consult
 * the MI auto-update opt-in setting to see if the latest update is minor / major,
 * and returns true or false accordingly.
 *
 * When used in the context of Plugins page, it will always return true no matter
 * whether the opt-in is set to minor or major. It will only return false if the
 * opt-in setting is disabled completely. We need to do this so that it's not confusing
 * to the user, because WordPress auto-update UI does not deal with the same granularity
 * as our opt-in setting.
 *
 * @since 6.3.0
 *
 * @param bool  $update  Flag to update the plugin or not.
 * @param array $item   Update data about a specific plugin.
 * @return bool $update The new update state.
 */
function userfeedback_automatic_updates( $update, $item ) {
	$item = (array) $item;

	$is_free = isset( $item['slug'] ) && 'userfeedback-lite' === $item['slug'];
	$is_paid = isset( $item['userfeedback_plugin'] ); // see updater class

	$automatic_updates = userfeedback_get_option( 'automatic_updates', false );

	// When used in the context of Plugins page.
	if ( function_exists( 'get_current_screen' ) ) {
		$screen = get_current_screen();
		if ( ! empty( $screen ) &&
			 ! empty( $screen->id ) &&
			 in_array( $screen->id, array( 'plugins', 'plugins-network' ) )
		) {
			$is_pro      = userfeedback_is_pro_version();
			$is_addon    = userfeedback_is_plugin_our_addon( $item['plugin'] );
			$is_main_pro = $is_pro && plugin_basename( USERFEEDBACK_PLUGIN_FILE ) === $item['plugin'];

			if ( $is_free ||
				 $is_main_pro ||
				 ( $is_addon && $is_pro )
			) {
				return in_array( $automatic_updates, array( 'all', 'minor' ) );
			} elseif ( $is_addon && ! $is_pro ) {
				return false;
			}
		}
	}

	// If this is multisite and is not on the main site, return early.
	if ( is_multisite() && ! is_main_site() ) {
		return $update;
	}

	// When used in the context of automatic plugin update routine, the $item
	// variable will have `new_version`, `slug` and `userfeedback_plugin` filled out:

	// If we don't have everything we need, return early.
	if ( ! isset( $item['new_version'] ) || ! isset( $item['slug'] ) ) {
		return $update;
	}

	// If the plugin isn't ours, return early.
	if ( ( ! $is_free && ! $is_paid ) || ( $is_free && ! defined( 'USERFEEDBACK_LITE_VERSION' ) ) ) {
		return $update;
	}

	$version       = $is_free ? USERFEEDBACK_LITE_VERSION : $item['old_version'];
	$current_major = userfeedback_get_major_version( $version );
	$new_major     = userfeedback_get_major_version( $item['new_version'] );

	// If the opt in update allows major updates but there is no major version update, return early.
	if ( $current_major < $new_major ) {
		if ( $automatic_updates === 'all' ) {
			return true;
		} else {
			return $update;
		}
	}

	// If the opt in update allows minor updates but there is no minor version update, return early.
	if ( $current_major == $new_major ) {
		if ( $automatic_updates === 'all' || $automatic_updates === 'minor' ) {
			return true;
		} else {
			return $update;
		}
	}

	// All our checks have passed - this plugin can be updated!
	return true;
}

add_filter( 'auto_update_plugin', 'userfeedback_automatic_updates', 10, 2 );
/**
 * Notes about autoupdater:
 * This runs on the normal WordPress auto-update sequence:
 * 1. In wp-includes/update.php, wp_version_check() is called by the WordPress update cron (every 8 or 12 hours; can be overriden to be faster/long or turned off by plugins)
 * 2. In wp-includes/update.php, wp_version_check() ends with a action call to do_action( 'wp_maybe_auto_update' ) if cron is running
 * 3. In wp-includes/update.php, wp_maybe_auto_update() hooks into wp_maybe_auto_update action, creates a new WP_Automatic_Updater instance and calls WP_Automatic_Updater->run
 * 4. In wp-admin/includes/class-wp-automatic-updater.php $this->run() checks to make sure we're on the main site if on a network, and also if the autoupdates are disabled (by plugin, by being on a version controlled site, etc )
 * 5. In wp-admin/includes/class-wp-automatic-updater.php $this->run() then checks to see which plugins have new versions (version/update check)
 * 6. In wp-admin/includes/class-wp-automatic-updater.php $this->run() then calls $this->update() for each plugin installed who has an upgrade.
 * 7 In wp-admin/includes/class-wp-automatic-updater.php $this->update() double checks filesystem access and then installs the plugin if able
 *
 * Notes:
 * - This autoupdater only works if WordPress core detects no version control. If you want to test this, do it on a new WP site without any .git folders anywhere.
 * - This autoupdater only works if the file access is able to be written to
 * - This autoupdater only works if a new version has been detected, and will run not the second the update is released, but whenever the cron for wp_version_check is next released. This is generally run every 8-12 hours.
 * - However, that cron can be disabled, the autoupdater can be turned off via constant or filter, version control or file lock can be detected, and other plugins can be installed (incl in functions of theme) that turn off all
 *      all automatic plugin updates.
 * - If you want to test this is working, you have to manually run the wp_version_check cron. Install the WP Crontrol plugin or Core Control plugin, and run the cron manually using it.
 * - Again, because you skimmed over it the first time, if you want to test this manually you need to test this on a new WP install without version control for core, plugins, etc, without file lock, with license key entered (for pro only)
 *        and use the WP Crontrol or Core Control plugin to run wp_version_check
 * - You may have to manually remove an option called "auto_update.lock" from the WP options table
 * - You may need to run wp_version_check multiple times (note though that they must be spaced at least 60 seconds apart)
 * - Because WP's updater asks the OS if the file is writable, make sure you do not have any files/folders for the plugin you are trying to autoupdate open when testing.
 * - You may need to delete the plugin info transient to get it to hard refresh the plugin info.
 */


function userfeedback_get_major_version( $version ) {
	$exploded_version = explode( '.', $version );
	if ( isset( $exploded_version[2] ) ) {
		return $exploded_version[0] . '.' . $exploded_version[1] . '.' . $exploded_version[2];
	} else {
		return $exploded_version[0] . '.' . $exploded_version[1] . '.0';
	}
}