#! /bin/bash
# vim: set tabstop=4 shiftwidth=4 expandtab filetype=sh:

# Set up A2SERVER to support Samba (Windows File Sharing)
# this script can also be used if new shares are introduced

[[ -f /tmp/a2server-autoAnswerYes ]] && autoAnswerYes=1 || autoAnswerYes=

if [[ ! $autoAnswerYes || -f /tmp/a2server-setupWindowsSharing ]]; then

    if [[ ! $autoAnswerYes ]]; then
        echo
        echo -n "Should Windows computers be able to connect to A2SERVER? "
        read
    fi
    if [[ $autoAnswerYes || ${REPLY:0:1} == "Y" || ${REPLY:0:1} == "y" ]]; then

        echo "A2SERVER: Setting up Windows file sharing..."
        sudo true

        sudo update-rc.d samba defaults &> /dev/null
        [[ ! -f /etc/init.d/samba ]] && installSamba=1

        if (( $installSamba )); then
            if [[ ! -f /tmp/a2server-packageReposUpdated ]]; then
                # prepare for installing packages
                sudo apt-get -y update
                touch /tmp/a2server-packageReposUpdated
            fi

            # Dependency: samba for Windows/modern Macs
            # FIXME: Figure out when smbpasswd moved and adjust this as necessary
            sudo apt-get -y install samba
            command -v smbpasswd > /dev/null || sudo apt-get -y install samba-common-bin
            sudo apt-get clean
        fi

        sudo /etc/init.d/samba start &> /dev/null

        workgroup=$(grep -o "^   workgroup = .*$" /etc/samba/smb.conf 2> /dev/null | cut -c 16-)
        [[ $workgroup ]] || workgroup="WORKGROUP"
        if [[ ! $autoAnswerYes ]]; then
            echo
            echo "Enter workgroup name (or press return for '${workgroup}'): "
            read
            [[ $REPLY ]] && workgroup=$REPLY
        fi
        sudo sed -i 's/^   workgroup = .*$/   workgroup = '$workgroup'/' /etc/samba/smb.conf 2> /dev/null
        sudo sed -i 's/^#   security = user/   security = user/' /etc/samba/smb.conf 2> /dev/null

        # remove GSFILES if no longer serving it
        if ! grep ^/srv/A2SERVER/GSFILES /usr/local/etc/netatalk/AppleVolumes.default; then
            sudo sed -i ':a;N;$!ba;s#\n\[GSFILES\].*\[#\n[#' /etc/samba/smb.conf
            sudo sed -i ':a;N;$!ba;s#\n\[GSFILES\].*$#\n#' /etc/samba/smb.conf
        fi

        grep ^/srv/A2SERVER /usr/local/etc/netatalk/AppleVolumes.default | cut -d" " -f2 \
            | while read sharename; do
            if [[ $(grep $sharename /etc/samba/smb.conf) ]]; then
                echo "A2SERVER: $sharename is already set up for Windows file sharing."
            else
                echo "[$sharename]" | sudo tee -a /etc/samba/smb.conf > /dev/null
                echo "    path = /srv/A2SERVER/$sharename" | sudo tee -a /etc/samba/smb.conf > /dev/null
                echo "    browsable = yes" | sudo tee -a /etc/samba/smb.conf > /dev/null
                echo "    guest ok = yes" | sudo tee -a /etc/samba/smb.conf > /dev/null
                echo "    read only = no" | sudo tee -a /etc/samba/smb.conf > /dev/null
                echo "    create mask = 0666" | sudo tee -a /etc/samba/smb.conf > /dev/null
                echo "    force user = $USER" | sudo tee -a /etc/samba/smb.conf > /dev/null
                echo "A2SERVER: $sharename has been set up for Windows file sharing."
            fi
        done

        echo
        echo "A2SERVER: Setting Windows file sharing password to 'apple2'."
        echo -e 'apple2\napple2' | sudo smbpasswd -s -a $USER

        echo
        echo "A2SERVER: Windows file sharing is now running."
    else
        sudo /etc/init.d/samba stop &> /dev/null
        sudo update-rc.d -f samba remove &> /dev/null
        echo "A2SERVER: Windows file sharing has been turned off."
    fi

    echo
fi