#
# plugin.rb - PasteHub's plugin loader
#  
#   Copyright (c) 2014-2014  Kiyoka Nishiyama  <kiyoka@sumibi.org>
#   
#   Redistribution and use in source and binary forms, with or without
#   modification, are permitted provided that the following conditions
#   are met:
#   
#   1. Redistributions of source code must retain the above copyright
#      notice, this list of conditions and the following disclaimer.
#  
#   2. Redistributions in binary form must reproduce the above copyright
#      notice, this list of conditions and the following disclaimer in the
#      documentation and/or other materials provided with the distribution.
#  
#   3. Neither the name of the authors nor the names of its contributors
#      may be used to endorse or promote products derived from this
#      software without specific prior written permission.
#  
#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
#   TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
#   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
#   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
#   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
#   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#  
#
module PasteHub
  class PluginClass
    attr_reader :plugins

    def initialize
      @plugins = []
    end

    def display_config
      @plugins.each {|x|
        STDERR.printf( "Info: plugin [%s] loaded.\n", x.class.to_s )
        x.display_config()
      }
    end

    def load_plugins
      dir = File.join(File.dirname(__FILE__), "plugin")
      load_plugin_dir(dir)
      nil
    end

    def load_plugin_dir(dir)
      dir = File.expand_path(dir)
      Dir.entries(dir).sort.each {|filename|
        if filename =~ /\.rb$/
          require File.join(dir, filename)
        end
      }
      nil
    end

    def register_plugin(obj)
      @plugins << obj
    end

    def distribute_newly_arrived(message)
      @plugins.each { |obj|
        obj.newly_arrived(message)
      }
    end
  end

  Plugin = PluginClass.new
end