sort subs by rank and preferred format

bin/getsub

@@ -96,7 +96,9 @@ def identify_by_imdb!(server, movie)
 end
 
 def select_sub(subs)
-  return subs.first if subs.length >= 1
+  if subs.length >= 1
+    return preferred_format(sort_by_rank(subs),["srt",'txt']) 
+  end
   movies = group_by_movie_name(subs)
   return movies.values.first.max if movies.length == 1
 
@@ -105,7 +107,27 @@ def select_sub(subs)
   selected_movie_subs = ask_user_to_identify_movie(movies)
   selected_movie_subs.max
 end
-
+# sort subs by rank. uses uploader user rank, downloads count, bad sub reports and sub rating
+# @param Array<OSDb::Sub> subs
+# @return Array<OSDb::Sub> sorted array
+def sort_by_rank(subs)
+  r = subs.sort_by{|s| 
+  	rank = ((s.raw_data['UserRank'].empty? ? 1 : 2) * (s.raw_data['SubDownloadsCnt'].to_i + 1) * (s.raw_data['SubRating'].to_f + 1)) - (s.raw_data['SubBad'].to_i / (s.raw_data['SubDownloadsCnt'].to_i+1))
+	rank
+  }.reverse
+  r
+end
+# select the sub with the preferred format
+# @param Array<OSDb::Sub> subs An array of subs to choose from
+# @param Array<string> formats_orig An ordered list of formats to choose from, eg ["srt","sub","txt"]
+# @return OSDb::Sub
+def preferred_format(subs, formats_orig)
+	formats = formats_orig.reverse
+	subs.sort_by{|sub| 
+		formats.index(formats.find{|format| 
+			sub.raw_data['SubFormat'].index(format)
+		}).to_s}.reverse.first
+end
 def select_and_download!(subs, movie)
   sub = select_sub(subs)
   sub_path = movie.sub_path(sub.format)