#! /bin/bash

# get a list of urls and corresponding output file names, then parse them to wget

LOGTAG="nameget.sh"
args=("$@")
list=${args[0]}

if [[ $list == "" ]]
        then
                printf  "\n\x1b[31mWrong number of arguments\x1b[0m\n\n"
                printf "Usage: nameget LIST [DESTINATION] [ARGS]\n       where LIST is a text file of format [url] [name] (one pair per line)\n             [DESTINATION] is a path appended to the start of each [name] in LIST\n             [ARGS] is passed directly to wget"
                exit 1
fi

if [[ -d ${args[1]} ]]; then                                    # check if args[2] is [DESTINATION] or [ARGS]
        outdir=${args[1]}
        if [[ ! $outdir =~ /$ ]]; then                  # check if [DESTINATION] has a trailing /
            outdir=$outdir/
        fi
        shift 2
else
        shift 1
fi

otherargs=$@                                                                                                    # set aside remaining arguments for passing to wget

logger -s -t $LOGTAG "starting downloading files in $list"

while read -r url filename; do
  if wget --cut-dirs=100 -np -e robots=off -O $outdir$filename $otherargs $url; then
                sed -i "/$filename/d" $list
                echo $filename
                logger -s -t $LOGTAG "downloaded $filename"
        else
                logger -s -t $LOGTAG "downloading of $filename from $url failed."
        fi
done < $list