1 files changed, 37 insertions, 0 deletions
diff --git a/Digitigrade/Policy.php b/Digitigrade/Policy.php
new file mode 100644
index 0000000..56fbdb0
--- /dev/null
+++ b/Digitigrade/Policy.php
@@ -0,0 +1,37 @@
+<?php
+namespace Digitigrade;
+
+use Digitigrade\Model\Actor;
+use Digitigrade\Model\Interaction;
+use Digitigrade\Model\Note;
+
+abstract class Policy {
+    /**
+     * Checks if an Actor is allowed and possibly alters it.
+     * @param Actor $actor the actor to check (may be modified in-place)
+     * @return bool true if allowed, false if the actor should be dropped
+     */
+    public function checkActor(Actor $actor): bool {
+        return true;
+    }
+
+    /**
+     * Checks if an Interaction is allowed and possibly alters it.
+     * @param Interaction $interaction the interaction to check (may be modified in-place)
+     * @return bool true if allowed, false if the interaction should be dropped
+     */
+    public function checkInteraction(Interaction $interaction): bool {
+        return true;
+    }
+
+    /**
+     * Checks if a Note is allowed and possibly alters it.
+     * @param Note $note the note to check (may be modified in-place)
+     * @return bool true if allowed, false if the note should be dropped
+     */
+    public function checkNote(Note $note): bool {
+        return true;
+    }
+
+    // TODO: public function checkExtension()
+}
+\ No newline at end of file