#!/bin/sh

domain=""
phpsessid=""
rememberme=""
ebookpath=""
uuid="" # ebook UUID

override_notify() {
    sub="$1"
    shift
    notify-send -h "string:x-canonical-private-synchronous:wallabag" $@ "Wallabag" "$sub"
}

# check if ebook exists before starting download
[ ! -e "/dev/disk/by-uuid/$uuid" ] && { override_notify "Ebook not connected." -u critical; exit 1; }

# mount ebook and remove last entry if existent
udisksctl mount -b "/dev/disk/by-uuid/$uuid" || { override_notify "Error mounting ebook." -u critical; exit 1; }
rm -f $ebookpath/unread_articles_????-??-??.epub

override_notify "Ebook mounted.\nDownloading..." -t 0

# download new epub file
outfile=$(mktemp)
curl -s "https://$domain/export/unread.json" \
    -H "cookie: PHPSESSID=$phpsessid; REMEMBERME=$rememberme" \
    -o "$outfile" \
    || { override_notify "Download failed." -u critical; exit 1; }

# if there new entries, download and transfer epub file
if [ "0" != "$(jq length "$outfile")" ]; then
    curl -s "https://$domain/export/unread.epub" \
        -H "cookie: PHPSESSID=$phpsessid; REMEMBERME=$rememberme" \
        -o "$outfile" \
        || { override_notify "Download failed." -u critical; exit 1; }

    override_notify "Transferring files." -t 0

    mv "$outfile" "$ebookpath/unread_articles_$(date +"%Y-%m-%d").epub"
fi

# if unmount failed check 1 second later, it normally fixes it
udisksctl unmount -b "/dev/disk/by-uuid/$uuid" \
    || { sleep 1; udisksctl unmount -b "/dev/disk/by-uuid/$uuid"; } \
    || { override_notify "Error unmounting ebook." -u critical; exit 1; }

override_notify "Finished successfully." -u low