1 files changed, 41 insertions, 0 deletions
diff --git a/lib/ar_condition.rb b/lib/ar_condition.rb
new file mode 100644
index 000000000..b08e90761
--- /dev/null
+++ b/lib/ar_condition.rb
@@ -0,0 +1,41 @@
+# redMine - project management software
+# Copyright (C) 2006-2008  Jean-Philippe Lang
+#
+# This program 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.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+class ARCondition
+  attr_reader :conditions
+  
+  def initialize(condition=nil)
+    @conditions = ['1=1']
+    @conditions.add(condition) if condition
+  end
+  
+  def add(condition)
+    if condition.is_a?(Array)
+      @conditions.first << " AND (#{condition.first})"
+      @conditions += condition[1..-1]
+    elsif condition.is_a?(String)
+      @conditions.first << " AND (#{condition})"
+    else
+      raise "Unsupported #{condition.class} condition: #{condition}"
+    end
+    self
+  end
+
+  def <<(condition)
+    add(condition)
+  end
+end