#! /bin/bash

set -e # Exit script immediately on first error.
#set -x # Print commands and their arguments as they are executed.

NON_UTF_FILE_DIR="wiki"
PATTERN_FILE_NAME="*.md"

find $NON_UTF_FILE_DIR -type f -name $PATTERN_FILE_NAME > utf8list
iconv utf8list > asciilist
i=1
for file in $(cat utf8list); do

	CURRENT_CHARSET="$(chardetect "$file" | awk '{print $2}')"
	if [ "$CURRENT_CHARSET" == utf-8 ]; then
		let i++
		continue
	fi
	if [ "$CURRENT_CHARSET" == GB2312 ]; then
        CURRENT_CHARSET="GB18030"
    fi

	newname=$(head -$i asciilist | tail -1 | tr -d '\n').utf8
	echo "converting file ($CURRENT_CHARSET) to utf-8 $file => $newname"
	#iconv -f ISO-8859-1 -t utf8 $file > $newname
	iconv -f "$CURRENT_CHARSET" -t utf8 $file > $newname
	mv $newname $file
	let i++
done

rm utf8list asciilist