From f5eb33d7a9c296e3fa7bde9b678f0e1027a9bf88 Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Thu, 11 Jan 2007 23:52:29 +0000
Subject: extension chain

---
diff --git a/include/Makefile.am b/include/Makefile.am
index 4b9b02a..2c190b8 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -7,7 +7,8 @@ nobase_include_HEADERS = \
 	opkele/server.h \
 	opkele/consumer.h \
 	opkele/extension.h \
-	opkele/sreg.h
+	opkele/sreg.h \
+	opkele/extension_chain.h
 EXTRA_DIST = \
 	opkele/data.h \
 	opkele/util.h
diff --git a/include/opkele/extension_chain.h b/include/opkele/extension_chain.h
new file mode 100644
index 0000000..955f4d5
--- a/dev/null
+++ b/include/opkele/extension_chain.h
@@ -0,0 +1,50 @@
+#ifndef __OPKELE_EXTENSION_CHAIN_H
+#define __OPKELE_EXTENSION_CHAIN_H
+
+/**
+ * @file
+ * @brief extension chain extension
+ */
+
+#include <list>
+#include <opkele/extension.h>
+
+/**
+ * @brief the main opkele namespace
+ */
+namespace opkele {
+    using std::list;
+
+    /**
+     * OpenID extensions chain used to combine extensions, it is actually an
+     * stl list of pointers to extensions.
+     */
+    class extension_chain_t : public extension_t, public list<extension_t*> {
+	public:
+
+	    /**
+	     * Default constructor creates an empty chain
+	     */
+	    extension_chain_t() { }
+	    /**
+	     * Create extension chain with a single extension in it
+	     */
+	    extension_chain_t(extension_t *e) { push_back(e); }
+
+	    /**
+	     * Implementation of consumer's checkid hook
+	     */
+	    virtual void checkid_hook(params_t& p,const string& identity);
+	    /**
+	     * Implementation of consumer's id_res hook
+	     */
+	    virtual void id_res_hook(const params_t& p,const params_t& sp,const string& identity);
+	    /**
+	     * Implementation of server's checkid_hook
+	     */
+	    virtual void checkid_hook(const params_t& pin,params_t& pout);
+    };
+
+}
+
+#endif /* __OPKELE_EXTENSION_CHAIN_H */
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 783f2ab..bdadd44 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -23,6 +23,7 @@ libopkele_la_SOURCES = \
 		       consumer.cc \
 		       exception.cc \
 		       extension.cc \
-		       sreg.cc
+		       sreg.cc \
+		       extension_chain.cc
 libopkele_la_LDFLAGS = \
 	-version-info 1:0:0
diff --git a/lib/extension_chain.cc b/lib/extension_chain.cc
new file mode 100644
index 0000000..16537dc
--- a/dev/null
+++ b/lib/extension_chain.cc
@@ -0,0 +1,16 @@
+#include <cstdarg>
+#include <opkele/extension_chain.h>
+
+namespace opkele {
+
+    void extension_chain_t::checkid_hook(params_t& p,const string& identity) {
+	for(iterator i=begin();i!=end();++i) (*i)->checkid_hook(p,identity);
+    }
+    void extension_chain_t::id_res_hook(const params_t& p,const params_t& sp,const string& identity) {
+	for(iterator i=begin();i!=end();++i) (*i)->id_res_hook(p,sp,identity);
+    }
+    void extension_chain_t::checkid_hook(const params_t& pin,params_t& pout) {
+	for(iterator i=begin();i!=end();++i) (*i)->checkid_hook(pin,pout);
+    }
+
+}
--
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