Added interactive version of sub-clean.sh

Solves #5
May also be handy for use cases such as other languages (as per #4) where regex has unwanted matches and the user is not automating the script

sub-clean-interactive.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+# cleans srt formatted subtitles of common blocks that may be considered unwanted
+# please consider leaving or modifying this regex to properly credit the hard work that is put into providing these subtitles
+
+### usage:
+## Download this file from the command line to your current directory:
+# curl https://raw.githubusercontent.com/brianspilner01/media-server-scripts/master/sub-clean-interactive.sh > sub-clean.sh && chmod +x sub-clean.sh
+## Test out what lines this script would remove:
+# REGEX_TO_REMOVE='opensubtitles|sub(scene|text|rip)|podnapisi|addic7ed|yify|napisy|bozxphd|sazu489|anoxmous|(br|dvd|web).?(rip|scr)|english (- )?us|sdh|srt|(sub(title)?(bed)?(s)?(fix)?|encode(d)?|correct(ed|ion(s)?)|caption(s|ed)|sync(ed|hroniz(ation|ed))?|english)(.pr(esented|oduced))?.?(by|&)|[^a-z]www\.|http|\.( )?(com|co|link|org|net|mp4|mkv|avi)([^a-z]|$)|©|™'
+# awk 'tolower($0) ~ '"/$REGEX_TO_REMOVE/" RS='' ORS='\n\n' "/path/to/sub.srt"
+
+SUB_FILEPATH="$1"
+
+# check usage
+[ ! -f "$SUB_FILEPATH" ] && { echo "usage: sub-clean.sh [FILE]" ; echo "Warning: subtitle file does not exist" ; exit 1 ; }
+
+# lowercase list of regex (gore/magic?) that will be removed from srt
+REGEX_TO_REMOVE='opensubtitles|sub(scene|rip)|podnapisi|addic7ed|titlovi|bozxphd|sazu489|psagmeno|normita|anoxmous|(br|dvd|web).?(rip|scr)|english (- )?us|sdh|srt|(yahoo|mail|book|fb|4m|hd)\. ?com|(sub(title)?(bed)?(s)?(fix)?|encode(d)?|correct(ed|ion(s)?)|caption(s|ed)|sync(ed|hroniz(ation|ed))?|english)(.pr(esented|oduced))?.?(by|&)|[^a-z]www\.|http|\. ?(co|pl|link|org|net|mp4|mkv|avi|pdf)([^a-z]|$)|©|™'
+
+if [[ $SUB_FILEPATH =~ \.srt$ ]] # only operate on srt files
+then
+
+        # convert any DOS formatted files to UNIX (remove carriage return line endings)
+        sed -i.bak 's/\r$//' "$SUB_FILEPATH" && rm "${SUB_FILEPATH}.bak"
+
+        ### each record (in awk) is defined as a block of srt formatted subs (record seperator RS is essentially \n\n+, see docs), with each line of the block a seperate field .i.e.:
+        # LINE NUMBER
+        # TIMESTAMP --> TIMESTAMP
+        # SUB LINE 1
+        # SUB LINE 2
+        # ...
+        #
+
+		LINES_TO_REMOVE=$(awk 'tolower($0) ~ '"/$REGEX_TO_REMOVE/" RS='' ORS='\n\n' "$SUB_FILEPATH")
+
+		if [[ $LINES_TO_REMOVE ]]
+		then
+
+			echo "The following lines have been marked for removal:"
+			echo
+			echo "#################################################"
+			echo
+			echo "$LINES_TO_REMOVE"
+			echo
+			echo "#################################################"
+			echo
+			echo "Press enter if this is ok"
+			echo "Type 'exit' to abort"
+			echo "Or, type a comma seperated list of srt line numbers that should be kept (false matches)"
+			read -p "$ " USER_INPUT
+
+			[[ $USER_INPUT == "exit" ]] && exit
+			[[ $USER_INPUT ]] || USER_INPUT="ignore"
+
+			USER_INPUT=$(echo "$USER_INPUT" | sed -E 's/([0-9]+)[^0-9]/\1|/g' | sed -E 's/[0-9]+/\^&\$/g')
+
+			awk 'tolower($0) !~ /'"$REGEX_TO_REMOVE"'/ || $1 ~ /'"$USER_INPUT"'/ { $1 = VAR++ ; print }' RS='' FS='\n' OFS='\n' ORS='\n\n' VAR=1 "$SUB_FILEPATH" > "$SUB_FILEPATH.tmp" && \
+			mv "$SUB_FILEPATH.tmp" "$SUB_FILEPATH" && \
+			chmod 666 "$SUB_FILEPATH" && \
+			echo "sub-clean.sh succesfully processed $SUB_FILEPATH"
+
+		else
+
+			echo "Sub looks clean!"
+			exit
+
+		fi
+
+else
+        echo "Provided file must be .srt"
+        exit 1
+fi
+