Merge remote-tracking branch 'origin/wdoor-stable'

[shogi-server/shogi-server.git] / shogi_server / util.rb

diff --git a/shogi_server/util.rb b/shogi_server/util.rb
index 3fef61a..e1813d3 100644 (file)
--- a/shogi_server/util.rb
+++ b/shogi_server/util.rb
@@ -1,7 +1,7 @@
 ## $Id$
 
 ## Copyright (C) 2004 NABEYA Kenichi (aka nanami@2ch)
-## Copyright (C) 2007-2008 Daigo Moriwaki (daigo at debian dot org)
+## Copyright (C) 2007-2012 Daigo Moriwaki (daigo at debian dot org)
 ##
 ## 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
@@ -17,6 +17,11 @@
 ## along with this program; if not, write to the Free Software
 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
+require 'date'
+require 'fileutils'
+require 'pathname'
+require 'thread'
+
 module ShogiServer
 
   # Generate a random number such as i<=n<max
@@ -37,4 +42,81 @@ module ShogiServer
   end
   module_function :shuffle
 
+  # See if the file is writable. The file will be created if it does not exist
+  # yet.
+  # Return true if the file is writable, otherwise false.
+  #
+  def is_writable_file?(file)
+    if String === file
+      file = Pathname.new file
+    end
+    if file.exist?
+      if file.file?
+        return file.writable_real?
+      else
+        return false
+      end
+    end
+    
+    begin
+      file.open("w") {|fh| } 
+      file.delete
+    rescue
+      return false
+    end
+
+    return true
+  end
+  module_function :is_writable_file?
+
+  # Convert a DateTime insntace to a Time instance.
+  #
+  def datetime2time(dt)
+    return Time.mktime dt.year, dt.month, dt.day, dt.hour, dt.min, dt.sec
+  end
+  module_function :datetime2time
+
+  # Convert a Time instance to a DateTime instance
+  #
+  def time2datetime(time)
+    return DateTime.new(time.year, time.mon, time.mday,
+                        time.hour, time.min, time.sec)
+  end
+  module_function :time2datetime
+
+  # Parse string representing a day-of-week and return a coresponding
+  # integer value: 1 (Monday) - 7 (Sunday)
+  #
+  def parse_dow(str)
+    index = Date::DAYNAMES.index(str) || Date::ABBR_DAYNAMES.index(str)
+    return nil if index.nil?
+    return index == 0 ? 7 : index
+  end
+  module_function :parse_dow
+
+  # Mkdir in a thread-safe way.
+  #
+  class Mkdir
+    @@mutex = Mutex.new
+
+    # Return true if a directory is successfully created or a directory
+    # exists already; false otherwise.
+    #
+    # @param path a directory name of a path to be created. For example,
+    # given /hoge/hoo/foo.txt, aim to create /hoge/hoo.
+    def Mkdir.mkdir_for(path)
+      unless FileTest.directory?(File.dirname(path))
+        @@mutex.synchronize do
+          unless FileTest.directory?(File.dirname(path))
+            begin
+              FileUtils.mkdir_p File.dirname(path)
+            rescue
+              return false
+            end
+          end
+        end # mutex
+      end
+      return true
+    end
+  end # class Mkdir
 end