Fix encoding

lib/griddler/email.rb

@@ -46,14 +46,6 @@ def extract_subject
       clean_invalid_utf8_bytes(params[:subject])
     end
 
-
-    ##to delete
-    def extract_body
-      text = EmailParser.extract_reply_body(text_or_sanitized_html)
-      text = clean_raw_text(text) if params.fetch(:text, '').presence
-      text
-    end
-
     def extract_headers
       if params[:headers].is_a?(Hash)
         deep_clean_invalid_utf8_bytes(params[:headers])
@@ -71,28 +63,9 @@ def text_or_sanitized_html
       text.presence || clean_raw_html(params.fetch(:html, '')).presence
     end
 
-
-    ##to delete
-    def clean_raw_text(text)
-      cleaned_text = clean_invalid_utf8_bytes(text)
-      full_sanitizer = Rails::Html::FullSanitizer.new
-      cleaned_text = full_sanitizer.sanitize(cleaned_text)
-      cleaned_text = HTMLEntities.new.decode(cleaned_text)
-      cleaned_text
-    end
-
-    ##to delete
-    def clean_raw_html(html)
-      Loofah::HTML5::WhiteList::ACCEPTABLE_PROTOCOLS.add('cid')
-      Loofah::HTML5::WhiteList::ACCEPTABLE_PROTOCOLS.add('data')
-      cleaned_html = clean_invalid_utf8_bytes(html)
-      cleaned_html = sanitize(cleaned_html)
-      cleaned_html = HTMLEntities.new.decode(cleaned_html)
-      cleaned_html
-    end
-
     def clean_raw_utf8(text)
-      clean_invalid_utf8_bytes(text) || ''
+      source_encoding = 'EUC-KR'
+      clean_invalid_utf8_bytes(text, source_encoding: source_encoding) || ''
     end
 
     def deep_clean_invalid_utf8_bytes(object)
@@ -111,8 +84,16 @@ def deep_clean_invalid_utf8_bytes(object)
       end
     end
 
-    def clean_invalid_utf8_bytes(text)
-      text.encode!('UTF-8', 'EUC-KR')
+    def clean_invalid_utf8_bytes(text, source_encoding: nil)
+      if source_encoding
+        text.force_encoding(source_encoding).encode!('UTF-8', source_encoding)
+      else
+        if text && !text.valid_encoding?
+          text.force_encoding('ISO-8859-1').encode!('UTF-8')
+        else
+          text
+        end
+      end
     end
   end
 end