initial commit from appmail

lib/postal/reply_separator.rb

@@ -0,0 +1,33 @@
+module Postal
+  class ReplySeparator
+
+    RULES = [
+      /^-{2,10} $.*/m,
+      /^\>*\s*----- ?Original Message ?-----.*/m,
+      /^\>*\s*From\:[^\r\n]*[\r\n]+Sent\:.*/m,
+      /^\>*\s*From\:[^\r\n]*[\r\n]+Date\:.*/m,
+      /^\>*\s*-----Urspr.ngliche Nachricht----- .*/m,
+      /^\>*\s*Le[^\r\n]{10,200}a .crit ?\:\s*$.*/,
+      /^\>*\s*__________________.*/m,
+      /^\>*\s*On.{10,200}wrote:\s*$.*/m,
+      /^\>*\s*Sent from my.*/m,
+      /^\>*\s*=== Please reply above this line ===.*/m,
+      /(^\>.*\n?){10,}/,
+    ]
+
+    def self.separate(text)
+      return '' unless text.is_a?(String)
+      text = text.gsub("\r", '')
+      stripped = ""
+      RULES.each do |rule|
+        text.gsub!(rule) do
+          stripped = $&.to_s + "\n" + stripped
+          ''
+        end
+      end
+      stripped = stripped.strip
+      [text.strip, stripped.blank? ? nil : stripped]
+    end
+
+  end
+end