Initial commit

Author: dmhendricks

app/Cache.php

@@ -0,0 +1,66 @@
+<?php
+namespace Nimbium\MyPlugin;
+
+class Cache extends Plugin {
+
+  /**
+    * Retrieves value from cache, if enabled/present, else returns value
+    *    generated by callback().
+    *
+    * @param string $key Key value of cache to retrieve
+    * @param function $callback Result to return/set if does not exist in cache
+    * @return string Cached value of key
+    */
+  public static function get_object( $key = null, $callback ) {
+
+    $object_cache_group = self::$settings['object_cache_group'] ?: sanitize_title( self::$settings['data']['Name'] );
+    $object_cache_expire = self::$settings['object_cache_expire'] ?: 86400; // Default to 24 hours of null
+
+    // Set key variable
+    $caller = end( debug_backtrace( DEBUG_BACKTRACE_IGNORE_ARGS, 2 ) );
+    $caller_class_name = strtolower( end( explode( "\\", $caller['class'] ) ) );
+    $object_cache_key = $caller_class_name . '_' . $caller['function'] . ( $key ? '_' . $key : '' );
+
+    // Try to get the value of the cache
+    $result = wp_cache_get( $object_cache_key, $object_cache_group );
+
+    // If result wasn't found/returned and/or caching is disabled, set & return the value from $callback
+    if(!$result) {
+      $result = $callback();
+      wp_cache_set( $object_cache_key, $result, $object_cache_group, $object_cache_expire);
+    }
+
+    return $result;
+
+  }
+
+  /**
+    * Flushes the object cache, if enabled. Parameters are not used but are
+    *    when passed by 'publish_post' action hook.
+    *
+    * Example usage: Cache::flush();
+    *
+    * @param int $ID The ID of the post being published
+    * @param WP_Post The post object that is being published
+    * @return mixed Returns success as JSON string if called by AJAX,
+    *    else true/false
+    */
+  public static function flush($ID = null, $post = null) {
+
+    $result = ['success' => true];
+
+    try {
+      wp_cache_flush();
+    } catch (Exception $e) {
+      $result = ['success' => false, 'message' => $e->getMessage()];
+    }
+
+    if( defined('DOING_AJAX') && DOING_AJAX ) {
+      echo json_encode($result);
+      wp_die();
+    }
+    return $result['success'];
+
+  }
+
+}