diff --git a/cachify.php b/cachify.php
index e98a6af..aa7a397 100644
--- a/cachify.php
+++ b/cachify.php
@@ -91,7 +91,7 @@
* @param string $class_name the class name.
*/
function cachify_autoload( $class_name ) {
- if ( in_array( $class_name, array( 'Cachify', 'Cachify_Backend', 'Cachify_CLI', 'Cachify_DB', 'Cachify_HDD', 'Cachify_MEMCACHED', 'Cachify_REDIS' ), true ) ) {
+ if ( in_array( $class_name, array( 'Cachify', 'Cachify_Backend', 'Cachify_CLI', 'Cachify_DB', 'Cachify_HDD', 'Cachify_MEMCACHED', 'Cachify_NOOP', 'Cachify_REDIS' ), true ) ) {
require_once sprintf(
'%s/inc/class-%s.php',
CACHIFY_DIR,
diff --git a/images/symbols.svg b/images/symbols.svg
index e437576..1f34522 100644
--- a/images/symbols.svg
+++ b/images/symbols.svg
@@ -4,14 +4,14 @@
-
-
-
-
+
+
+
+
diff --git a/inc/class-cachify-noop.php b/inc/class-cachify-noop.php
new file mode 100644
index 0000000..62634f9
--- /dev/null
+++ b/inc/class-cachify-noop.php
@@ -0,0 +1,112 @@
+unavailable_method = $unavailable_method;
+ }
+
+ /**
+ * Availability check
+ *
+ * @return bool TRUE when installed
+ */
+ public static function is_available() {
+ return true;
+ }
+
+ /**
+ * Caching method as string
+ *
+ * @return string Caching method
+ */
+ public static function stringify_method() {
+ return 'NOOP';
+ }
+
+ /**
+ * Store item in cache
+ *
+ * @param string $hash Hash of the entry.
+ * @param string $data Content of the entry.
+ * @param int $lifetime Lifetime of the entry.
+ * @param bool $sig_detail Show details in signature.
+ */
+ public static function store_item( $hash, $data, $lifetime, $sig_detail ) {
+ // NOOP.
+ }
+
+ /**
+ * Read item from cache
+ *
+ * @param string $hash Hash of the entry.
+ *
+ * @return false No content
+ */
+ public static function get_item( $hash ) {
+ return false;
+ }
+
+ /**
+ * Delete item from cache
+ *
+ * @param string $hash Hash of the entry.
+ * @param string $url URL of the entry [optional].
+ */
+ public static function delete_item( $hash, $url = '' ) {
+ // NOOP.
+ }
+
+ /**
+ * Clear the cache
+ */
+ public static function clear_cache() {
+ // NOOP.
+ }
+
+ /**
+ * Print the cache
+ *
+ * @param bool $sig_detail Show details in signature.
+ * @param array $cache Array of cache values.
+ */
+ public static function print_cache( $sig_detail, $cache ) {
+ // NOOP.
+ }
+
+ /**
+ * Get the cache size
+ *
+ * @return int Column size
+ */
+ public static function get_stats() {
+ return 0;
+ }
+}
diff --git a/inc/class-cachify.php b/inc/class-cachify.php
index 85eb658..debe51c 100644
--- a/inc/class-cachify.php
+++ b/inc/class-cachify.php
@@ -389,24 +389,74 @@ private static function _set_default_vars() {
/* Options */
self::$options = self::_get_options();
- /* HDD */
- if ( self::METHOD_HDD === self::$options['use_apc'] && Cachify_HDD::is_available() ) {
- self::$method = new Cachify_HDD();
-
- /* MEMCACHED */
- } elseif ( self::METHOD_MMC === self::$options['use_apc'] && Cachify_MEMCACHED::is_available() ) {
- self::$method = new Cachify_MEMCACHED();
-
- /* REDIS */
- } elseif ( self::METHOD_REDIS === self::$options['use_apc'] && Cachify_REDIS::is_available() ) {
- self::$method = new Cachify_REDIS();
-
- /* DB */
+ if ( self::METHOD_APC === self::$options['use_apc'] ) {
+ /* APC */
+ add_action( 'admin_notices', array( __CLASS__, 'admin_notice_unavailable' ) );
+ self::$method = new Cachify_NOOP( 'APC' );
+ } elseif ( self::METHOD_HDD === self::$options['use_apc'] ) {
+ /* HDD */
+ if ( Cachify_HDD::is_available() ) {
+ self::$method = new Cachify_HDD();
+ } else {
+ add_action( 'admin_notices', array( __CLASS__, 'admin_notice_unavailable' ) );
+ self::$method = new Cachify_NOOP( Cachify_HDD::stringify_method() );
+ }
+ } elseif ( self::METHOD_MMC === self::$options['use_apc'] ) {
+ /* Memcached */
+ if ( Cachify_MEMCACHED::is_available() ) {
+ self::$method = new Cachify_MEMCACHED();
+ } else {
+ add_action( 'admin_notices', array( __CLASS__, 'admin_notice_unavailable' ) );
+ self::$method = new Cachify_NOOP( Cachify_MEMCACHED::stringify_method() );
+ }
+ } elseif ( self::METHOD_REDIS === self::$options['use_apc'] ) {
+ /* Redis */
+ if ( Cachify_REDIS::is_available() ) {
+ self::$method = new Cachify_REDIS();
+ } else {
+ add_action( 'admin_notices', array( __CLASS__, 'admin_notice_unavailable' ) );
+ self::$method = new Cachify_NOOP( Cachify_REDIS::stringify_method() );
+ }
} else {
+ /* Database */
self::$method = new Cachify_DB();
}
}
+ /**
+ * Show admin notice if caching backend is unavailable.
+ *
+ * @since 2.4.0
+ */
+ public static function admin_notice_unavailable() {
+ if ( current_user_can( 'manage_options' ) ) {
+ $unavailable_method = '-';
+ if ( self::$method instanceof Cachify_NOOP ) {
+ $unavailable_method = self::$method->unavailable_method;
+ }
+
+ printf(
+ '',
+ esc_html__( 'Cachify backend not available', 'cachify' ),
+ esc_html(
+ sprintf(
+ /* translators: Name of the caching backend inserted for placeholder */
+ __( 'The configured caching backend is not available: %s', 'cachify' ),
+ $unavailable_method
+ )
+ ),
+ wp_kses(
+ sprintf(
+ /* translators: Link to Cachify settings page inserted at placeholder */
+ __( 'Please check your server configuration and visit the settings page to chose a different method.', 'cachify' ),
+ add_query_arg( array( 'page' => 'cachify' ), admin_url( 'options-general.php' ) )
+ ),
+ array( 'a' => array( 'href' => array() ) )
+ )
+ );
+ }
+ }
+
/**
* Get options
*
diff --git a/tests/test-cachify-noop.php b/tests/test-cachify-noop.php
new file mode 100644
index 0000000..92d0353
--- /dev/null
+++ b/tests/test-cachify-noop.php
@@ -0,0 +1,58 @@
+unavailable_method, 'unexpected name of unavailable method' );
+ $noop = new Cachify_NOOP();
+ self::assertSame( '', $noop->unavailable_method, 'unexpected default name of unavailable method' );
+ }
+
+ /**
+ * Test the actual caching.
+ */
+ public function test_caching() {
+ self::go_to( '/testme/' );
+ Cachify_NOOP::store_item(
+ '965b4abf2414e45036ab90c9d3f8dbc7',
+ 'Test MeTest Content.
',
+ 3600,
+ false
+ );
+ self::assertFalse(
+ Cachify_NOOP::get_item('965b4abf2414e45036ab90c9d3f8dbc7'),
+ "item should not have been stored"
+ );
+
+ Cachify_NOOP::delete_item( '965b4abf2414e45036ab90c9d3f8dbc7' );
+ self::assertFalse(
+ Cachify_NOOP::get_item('965b4abf2414e45036ab90c9d3f8dbc7'),
+ "item present after deletion"
+ );
+ }
+}