From 1254787d03413a3b76022541af11020b362ff754 Mon Sep 17 00:00:00 2001
From: paul <paul@65a33f86-aa00-0410-91be-cd1bf5efb309>
Date: Wed, 28 Sep 2005 14:51:32 +0000
Subject: [PATCH] Added multiple backend/plugin support:  * Transformed
 Server::Handler::Backend to Server::Handler::Backend::Basic.  * Inheritance
 from this class will result in registering of the class    for that type.  *
 Written Server::Handler::Backend module for loading and getting backends.  *
 Provided empty LDAP backend class.  * Changed auth stub to not use rand() but
 to check whether the password    is "foo".

git-svn-id: svn+ssh://svn.luon.net/svn/ildus/trunk@5 65a33f86-aa00-0410-91be-cd1bf5efb309
---
 lib/ildus/server.rb               |  6 +++
 lib/ildus/server/account.rb       |  2 +-
 lib/ildus/server/backend.rb       | 73 ++++++++++++++++++++++---------
 lib/ildus/server/backends/ldap.rb | 15 +++++++
 lib/ildus/server/handler.rb       |  5 ++-
 5 files changed, 78 insertions(+), 23 deletions(-)
 create mode 100644 lib/ildus/server/backends/ldap.rb

diff --git a/lib/ildus/server.rb b/lib/ildus/server.rb
index bd17523..a116d03 100644
--- a/lib/ildus/server.rb
+++ b/lib/ildus/server.rb
@@ -29,6 +29,8 @@ module Ildus
       @config = nil
       parse_config(config_file)
 
+      Backend.load
+
       super(config['port'], DEFAULT_HOST, 20, $stderr, true, false)
     end
 
@@ -63,8 +65,12 @@ module Ildus
       raise ArgumentError unless FileTest.exists? filename
 
       File.open(filename, "r") do |io|
+        # FIXME: merge the YAML with a default config
         @config = YAML.load(io)
       end
+
+      # FIXME: test config for existance of certain fields:
+      # port, passwd, backend, backend/type
     end
 
   end # class Server
diff --git a/lib/ildus/server/account.rb b/lib/ildus/server/account.rb
index 179b6de..9d6a84c 100644
--- a/lib/ildus/server/account.rb
+++ b/lib/ildus/server/account.rb
@@ -38,7 +38,7 @@ module Ildus
         raise Handler::AlreadyAuthError if @auth
         @pass = password
         ## STUB
-        @auth = rand(2).zero?
+        @auth = (password == "foo")
         ##
       end
 
diff --git a/lib/ildus/server/backend.rb b/lib/ildus/server/backend.rb
index 5dcdc0b..0e97b6d 100644
--- a/lib/ildus/server/backend.rb
+++ b/lib/ildus/server/backend.rb
@@ -12,35 +12,66 @@ require 'singleton'
 module Ildus
 
   class Server
+
+    module Backend
+     
+      BackendClasses = Hash.new
+
+      class << self
+
+        def load
+          path = File.dirname(__FILE__)
+          Dir["#{path}/backends/**/*.rb"].each { |file| require file }
+        end
+
+        def get(type)
+          BackendClasses[type.to_sym]
+        end
+        alias_method :[], :get
+
+        def register(type, backend_class)
+          if BackendClasses.include? type
+            raise "type #{type} already registered" 
+          end
+          BackendClasses[type] = backend_class
+        end
+
+      end
   
-    class Backend
-      include Singleton   
+      class Basic
 
-      def hostnames_of(user)
-        raise Handler::NotImplementedError
-      end
+        def self.inherited(subclass)
+          type = subclass.to_s.split('::').last.downcase.to_sym
+          Backend.register(type, subclass)
+        end
 
-      def add_hostname(user)
-        raise Handler::NotImplementedError
-      end
+        def hostnames_of(user)
+          raise Handler::NotImplementedError
+        end
 
-      def remove_hostname(user)
-        raise Handler::NotImplementedError
-      end
+        def add_hostname(user)
+          raise Handler::NotImplementedError
+        end
 
-      def update_hostname(user, host, addr)
-        raise Handler::NotImplementedError
-      end
+        def remove_hostname(user)
+          raise Handler::NotImplementedError
+        end
 
-      def add_alias(user, new_alias, host)
-        raise Handler::NotImplementedError
-      end
+        def update_hostname(user, host, addr)
+          raise Handler::NotImplementedError
+        end
 
-      def remove_alias(user, old_alias, host)
-        raise Handler::NotImplementedError
-      end
+        def add_alias(user, new_alias, host)
+          raise Handler::NotImplementedError
+        end
 
-    end # class Backend
+        def remove_alias(user, old_alias, host)
+          raise Handler::NotImplementedError
+        end
+
+      end # class Basic
+
+    end # module Backend
 
   end # class Server
 
diff --git a/lib/ildus/server/backends/ldap.rb b/lib/ildus/server/backends/ldap.rb
new file mode 100644
index 0000000..940a2e0
--- /dev/null
+++ b/lib/ildus/server/backends/ldap.rb
@@ -0,0 +1,15 @@
+# = ildus/server/backend - generic server backend library
+#
+# Copyright (C) 2005 Paul van Tilburg <paul@luon.net>
+#
+# Ildus is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option)
+# any later version.
+
+module Ildus::Server::Backend
+
+  class LDAP < Basic
+  end
+
+end
diff --git a/lib/ildus/server/handler.rb b/lib/ildus/server/handler.rb
index 1f42053..9a11b46 100644
--- a/lib/ildus/server/handler.rb
+++ b/lib/ildus/server/handler.rb
@@ -61,7 +61,10 @@ module Ildus
         @server  = server
         @io      = io
         @account = Account.new
-        @backend = Backend.instance
+        type  = server.config["backend"]["type"]
+        klass = Backend[server.config["backend"]["type"]]
+        raise "backend type `#{type}' not found" if klass.nil?
+        @backend = klass.new
       end
 
       def handle_client