#调用办法
export SRC="/media/sdb13/tmp_transfer/123.name_UTF8_content_GB18030";
export DES="/ext/usr/convert/old_laptop.123.name_UTF8_content_UTF8";

echo "SRC=\\"$SRC\\"";
echo "DES=\\"$DES\\"";

date;
sh ./tfw_iconv_cp.sh "$SRC" "$DES" gb18030 utf8>tfw_iconv_cp.log 2>tfw_iconv_cp.err;
date;

#功能
intCount=0;

tfw_deep_demo()
{
    local strSrcFileName="$1";
    local strDesFileName="$2";
    local strFromEncoding="$3";
    local strToEncoding="$4";

    if [ -z "$strSrcFileName" ]; then
        processLength0 "$strSrcFileName";
        return 11;
    fi;

    # A DEAD symbolic link IS AN EXISTING FILE to this function.
    # But "test -e" to a dead link returns 1.
    # As a result, put "processSL" HERE BEFORE "test -e".
    if [ -L "$strSrcFileName" ]; then
        processSL "$strSrcFileName" "$strDesFileName";
        return 0;
    fi;

    if [ ! -e "$strSrcFileName" ]; then
        processNE "$strSrcFileName";
        return 12;
    fi;

    if [ ! -r "$strSrcFileName" ]; then
        processNR "$strSrcFileName";
        return 13;
    fi;

    if [ -d "$strSrcFileName" ]; then
        processDir "$strSrcFileName" "$strDesFileName" "$strFromEncoding" "$strToEncoding";
        return 0;
    fi;

    if [ -f "$strSrcFileName" ]; then
        processFile "$strSrcFileName" "$strDesFileName" "$strFromEncoding" "$strToEncoding";
        return 0;
    fi;

    processAbnormal "$strSrcFileName";
    return 14;
}

echo2()
{
    local strMsg="$1";
    echo "$strMsg";
    echo "$strMsg">&2;
}

processAbnormal()
{
    echo2 "Abnormal \\"$1\\".";
    return 0;
}

processNE()
{
    echo2 "! -e \\"$1\\"";
read;
    return 0;
}

processLength0()
{
    echo2 "-z   \\"$1\\"";
    return 0;
}

processNR()
{
    echo2 "! -r \\"$1\\"";
    return 0;
}

processDNX()
{
    echo2 "DIR ! -x \\"$1\\"";
    return 0;
}

processDir()
{
    local strSrcDirName="$1";
    local strDesDirName="$2";
    local strFromEncoding="$3";
    local strToEncoding="$4";

    if [ ! -r "$strSrcDirName" ]; then
        processDNX "$strSrcDirName";
        return 11;
    fi;

    echo "\\"$strSrcDirName\\"";
    echo "  Directory, accessable; from \\"$strFromEncoding\\" to \\"$strToEncoding\\".";

    mkdir -p "$strDesDirName";
    intRetCode=$?;
    if [ 0 -ne $intRetCode ]; then
        echo2 " Failed [mkdir -p \\"$strDesDirName\\"].";
        intStatCode=11; return $intStatCode;
    fi;

    local IFS_BK=$IFS;
    IFS=$'\\n';
    local fileNameList="$(ls -A $strSrcDirName)";
    for strSubFileName in $fileNameList; do
        tfw_deep_demo "$strSrcDirName/$strSubFileName" "$strDesDirName/$strSubFileName" "$strFromEncoding" "$strToEncoding";
    done;
    IFS=$IFS_BK;

    touchTimeStamp "$strSrcFileName" "$strDesFileName";
    return 0;
}

processSL()
{
    local strSrcFileName="$1";
    local strDesFileName="$2";

    echo "\\"$strSrcFileName\\"";
    echo "  Symbolic link, use \\"cp -af\\"";

    cp -af "$strSrcFileName" "$strDesFileName";
    intRetCode=$?;
    if [ 0 -ne $intRetCode ]; then
        echo2 " Failed [cp -af \\"$strSrcFileName\\" "$strDesFileName"].";
        intStatCode=11; return $intStatCode;
    fi;

    # touchTimeStamp "$strSrcFileName" "$strDesFileName";
    return 0;
}

processFile()
{
    local strSrcFileName="$1";
    local strDesFileName="$2";
    local strFromEncoding="$3";
    local strToEncoding="$4";

    echo "\\"$strSrcFileName\\"";
    echo "  File, readable; from \\"$strFromEncoding\\" to \\"$strToEncoding\\".";
    local intStatCode=0;
    local intRetCode=0;

    # No converting to HTML file or HTML template.
    convertOrNot "$strSrcFileName";
    intRetCode=$?;
    if [ 0 -ne $intRetCode ]; then
        echo "  Not to convert \\"$strSrcFileName\\", just cp.";
        cp -af "$strSrcFileName" "$strDesFileName";
        intStatCode=1; return $intStatCode;
    fi;

    # Test converting.
    iconv -f "$strFromEncoding" -t "$strToEncoding" "$strSrcFileName">"/dev/null";
    intRetCode=$?;
    if [ 0 -ne $intRetCode ]; then
        echo2 " Failed testing \\"$strSrcFileName\\", iconv returns $intRetCode";
        cp -af "$strSrcFileName" "$strDesFileName";

        touchTimeStamp "$strSrcFileName" "$strDesFileName";
        intStatCode=12; return $intStatCode;
    fi;

    # Converting.
    iconv -f "$strFromEncoding" -t "$strToEncoding" "$strSrcFileName">"$strDesFileName";
    intRetCode=$?;
    if [ 0 -ne $intRetCode ]; then
        echo2 " Failed convetring \\"$strSrcFileName\\", iconv returns $intRetCode";
        intStatCode=13; return $intStatCode;
    fi;

    touchTimeStamp "$strSrcFileName" "$strDesFileName";
    return $intStatCode;
}

convertOrNot()
{
    local strFileName="$1";
    local strFilePostfix="${strFileName##*.}";
    local strList=$(echo -e "html\\nhtm\\nmht\\nasp\\nphp\\njs\\njsp\\ndesktop");
    for strOneToMatch in $strList; do
        if [[ $strOneToMatch == $strFilePostfix ]]; then
            return 1;
        fi;
    done;
    return 0;
}

touchTimeStamp()
{
    # "touch -cr" can not handle a symbolic link.
    # Have to use another way.

    local strSrcFileName="$1";
    local strDesFileName="$2";

    local strTimeStampMidRst=$(stat -c %x "$strSrcFileName" | awk -F. '{print $1}' | awk '{print $1$2}' | awk -F- '{print $1$2$3}');
    local strTimeStampA=$(echo "$strTimeStampMidRst" | awk -F: '{print $1$2}');
    local strTimeStampB=$(echo "$strTimeStampMidRst" | awk -F: '{print $3}');
    local strAtime="$strTimeStampA.$strTimeStampB";

    strTimeStampMidRst=$(stat -c %y "$strSrcFileName" | awk -F. '{print $1}' | awk '{print $1$2}' | awk -F- '{print $1$2$3}');
    strTimeStampA=$(echo "$strTimeStampMidRst" | awk -F: '{print $1$2}');
    strTimeStampB=$(echo "$strTimeStampMidRst" | awk -F: '{print $3}');
    local strMtime="$strTimeStampA.$strTimeStampB";

    # "-c" to prevent creating a file for a DEAD symbolic link.
    touch -cmt $strMtime "$strDesFileName";
    touch -cat $strAtime "$strDesFileName";
}

tfw_deep_demo "$1" "$2" "$3" "$4";