added initial support for db

Access to database is made using DataObjects

dbconfig.yml

@@ -1,6 +1,6 @@
 host: localhost
 user: username
 password: secret
-driver: pg
+driver: postgres
 database: test
 

lib/postpolicy/config.rb

@@ -36,7 +36,8 @@ class << self
         def load( filename )
           if filename 
             @dbconfig = YAML.load_file( filename ).stringify_keys!.freeze
-            @dbi_params = ["DBI:#{@dbconfig[:driver]}:#{@dbconfig[:database]}", @dbconfig[:user], @dbconfig[:password]]
+            require "do_#{@dbconfig[:driver]}"
+            @dbi_params = "#{@dbconfig[:driver]}://#{@dbconfig[:user]}:#{@dbconfig[:password]}@#{@dbconfig[:host]}:#{@dbconfig[:port]}/#{@dbconfig[:database]}"
           end
         end
 

lib/postpolicy/plugins/datasource/sql.rb

@@ -0,0 +1,35 @@
+module PostPolicy
+  module DataSource
+
+    class Sql < Base
+
+      def initialize( query )
+        @query = query
+      end
+
+      def exists?( value )
+        result = false
+        connection do |conn|
+          command = conn.create_command( @query )
+          reader = command.execute_reader
+          while reader.next 
+            if reader.values[0] && item[0] == value
+              result = true
+              break
+            end
+          end
+        end
+        result
+      end
+
+      protected
+      def connection( &block )
+        conn = DataObjects::Connection.new( Config::Db.dbi_params ) 
+        block.call( conn )
+        conn.close
+      end
+
+    end
+
+  end
+end

postpolicy.yml

@@ -2,7 +2,7 @@ acl:
   foo: 
     sender: [email protected]
   bar:
-    sender: file:///home/michal/test/filetest
+    #sender: file:///home/michal/test/filetest
     recipient: sql://"SELECT * FROM users WHERE login = '%l'"
 
 action: 

test/config_spec.rb

@@ -8,15 +8,16 @@
                 :database => 'postpolicy',
                 :user => 'foo',
                 :password => 'secret',
-                :driver => 'pg' }
+                :port => 5432,
+                :driver => 'postgres' }
 
     File.open( filename, 'w' ) do |f|
       f.puts config.to_yaml 
     end
 
     PostPolicy::Config::Db.load( filename )
     PostPolicy::Config::Db.dbconfig.should == config
-    dbi_params = ["DBI:#{config[:driver]}:#{config[:database]}", config[:user], config[:password]]
+    dbi_params = "#{config[:driver]}://#{config[:user]}:#{config[:password]}@#{config[:host]}:#{config[:port]}/#{config[:database]}"
     PostPolicy::Config::Db.dbi_params.should == dbi_params
 
     FileUtils.rm( filename )

test/datasource_spec.rb

@@ -51,3 +51,11 @@
   end
 
 end
+
+describe PostPolicy::DataSource::Sql do
+
+  it "should check in db" do
+    ds = PostPolicy::DataSource::Sql.new( "SELECT id from test" )
+  end
+
+end