Add class Modem. [meaculpa] it is missing test for a while, fix it soon

lib/biju.rb

@@ -1,2 +1,3 @@
 require 'biju/version'
+require "biju/modem"
 require "biju/sms"

lib/biju/modem.rb

@@ -0,0 +1,48 @@
+require 'serialport'
+require_relative 'sms'
+
+module Biju
+  class Modem
+    def initialize(options={})
+      raise Exception.new("Port is required") unless options[:port]
+      @connection = connection(options)
+      cmd("AT")
+      cmd("AT+CMGF=1")
+    end
+
+    def connection(options)
+      port = options.delete(:port)
+      SerialPort.new(port, default_options.merge!(options))
+    end
+
+    def close
+      @connection.close
+    end
+
+    def messages
+      sms = cmd("AT+CMGL=\"ALL\"")
+      msgs = sms.scan(/\+CMGL\:\s*?(\d+)\,.*?\,\"(.+?)\"\,.*?\,\"(.+?)\".*?\n(.*)/)
+      return nil unless msgs
+      msgs.collect!{ |msg| Biju::Sms.new(:id => msg[0], :phone_number => msg[1], :datetime => msg[2], :message => msg[3].chomp) }
+    end
+
+    private
+    def default_options
+      { :baud => 9600, :data_bits => 8, :stop_bits => 1, :parity => SerialPort::NONE }
+    end
+
+    def cmd(cmd)
+      @connection.write(cmd + "\r")
+      wait
+    end
+
+    def wait
+      buffer = ''
+      while IO.select([@connection], [], [], 0.25)
+        chr = @connection.getc.chr;
+        buffer += chr
+      end
+      buffer
+    end
+  end
+end

spec/biju/modem_spec.rb

@@ -0,0 +1,10 @@
+require_relative '../spec_helper'
+
+# TODO: Fix missing tests SOON
+describe Biju::Modem do
+  describe ".new" do
+    it "should raise an Exception without port option" do
+      lambda { Biju::Modem.new }.must_raise Exception
+    end
+  end
+end