first import

sites/all/modules/context/plugins/context_reaction.inc

@@ -0,0 +1,86 @@
+<?php
+
+/**
+ * Base class for a context reaction.
+ */
+class context_reaction {
+  var $plugin;
+  var $title;
+  var $description;
+
+  /**
+   * Clone our references when we're being cloned.
+   *
+   * PHP 5.3 performs 'shallow' clones when clone()'ing objects, meaning that
+   * any objects or arrays referenced by this object will not be copied, the
+   * cloned object will just reference our objects/arrays instead. By iterating
+   * over our properties and serializing and unserializing them, we force PHP to
+   * copy them.
+   */
+  function __clone() {
+    foreach ($this as $key => $val) {
+      if (is_object($val) || (is_array($val))) {
+        $this->{$key} = unserialize(serialize($val));
+      }
+    }
+  }
+
+  /**
+   * Constructor. Do not override.
+   */
+  function __construct($plugin, $info) {
+    $this->plugin = $plugin;
+    $this->title = isset($info['title']) ? $info['title'] : $plugin;
+    $this->description = isset($info['description']) ? $info['description'] : '';
+  }
+
+  function options_form($context) {
+    return array();
+  }
+
+  /**
+   * Options form submit handler.
+   */
+  function options_form_submit($values) {
+    return $values;
+  }
+
+  /**
+   * Settings form. Provide variable settings for your reaction.
+   */
+  function settings_form() {
+    return array();
+  }
+
+  /**
+   * Public method that is called from hooks or other integration points with
+   * Drupal. Note that it is not implemented in the base class, allowing
+   * extending classes to change the function signature if necessary.
+   *
+   * function execute($value) {
+   *   foreach ($this->get_contexts($value) as $context) {
+   *     $this->condition_met($context, $value);
+   *   }
+   * }
+   */
+
+  /**
+   * Retrieve active contexts that have values for this reaction.
+   */
+  function get_contexts() {
+    $contexts = array();
+    foreach (context_active_contexts() as $context) {
+      if ($this->fetch_from_context($context)) {
+        $contexts[$context->name] = $context;
+      }
+    }
+    return $contexts;
+  }
+
+  /**
+   * Retrieve options from the context provided.
+   */
+  function fetch_from_context($context) {
+    return isset($context->reactions[$this->plugin]) ? $context->reactions[$this->plugin] : array();
+  }
+}