Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/lib/theme/file/abstract.php

@@ -0,0 +1,80 @@
+<?php
+/**
+ * Abstract class for a file.
+ *
+ * @author     Time.ly Network Inc.
+ * @since      2.0
+ *
+ * @package    AI1EC
+ * @subpackage AI1EC.Theme.File
+ */
+abstract class Ai1ec_File_Abstract extends Ai1ec_Base {
+
+    /**
+     * @var array The paths where to look for the file.
+     */
+    protected $_paths;
+
+    /**
+     * @var string The name of the file.
+     */
+    protected $_name;
+
+    /**
+     * @var mixed The content of the file.
+     * Usually it's a string but for some edge cases it might be a PHP type like an array
+     * The only case now is user_variables.php for Less
+     */
+    protected $_content;
+
+    /**
+     * Locates the file and parses its content. Populates $this->_content.
+     *
+     * @return boolean Returns true if the file is found, false otheriwse.
+     */
+    abstract public function process_file();
+
+    /**
+     * Standard constructor for basic files.
+     *
+     * @param Ai1ec_Registry_Object $registry
+     * @param string $name
+     * @param array $paths
+     */
+    public function __construct(
+        Ai1ec_Registry_Object $registry,
+        $name,
+        array $paths
+    ) {
+        parent::__construct( $registry );
+        $this->_paths = $paths;
+        $this->_name  = $name;
+    }
+
+    /**
+     * Renders the content of the file to the screen.
+     */
+    public function render() {
+        echo $this->_content;
+    }
+
+
+    /**
+     * @param bool $mute_output used for compatibility reason with old code.
+     *
+     * @return mixed the parsed content of the file.
+     */
+    public function get_content( $mute_output = false ) {
+        if ( true === $mute_output ) {
+            return '';
+        }
+        return $this->_content;
+    }
+
+    /**
+     * Just in case you want to echo the object.
+     */
+    public function __toString() {
+        return $this->_content;
+    }
+}