dcvgui.sh

#!/usr/bin/env bash

: "${CONFIGDIR:=$HOME/.config/dcvgui}"
: "${DCVVIEWER:=dcvviewer}"
DCVVIEWER_OPTIONS=(--fullscreen --certificate-validation-policy=accept-untrusted)
DEFAULT_PORT=8443

check_prereqs () {
    command -v yad >/dev/null 2>&1 || {
        echo >&2 "Error: yad is not installed; please install it."
        exit 1
    }
    command -v "$DCVVIEWER" >/dev/null 2>&1 || {
        echo >&2 "Error: dcvviewer ($DCVVIEWER) is not installed; please install it."
        exit 1
    }
    mkdir -p "$CONFIGDIR"
}

show_error () {
    local ERR_OPTIONS=(--text-info
                       --height 100 --width 300 --window-icon=gtk-dialog-error --centered --title "Error"
                       --fore=RED --margins=10 --wrap
                       --button OK:0
                      )
    yad "${ERR_OPTIONS[@]}" <<< "Error: $*"
}

run_gui () {
    local GUI_OPTIONS=(--height 300 --window-icon=applications-libraries --centered --borders=10 --title "Choose DCV Connection"
                       --no-click --ellipsize end
                       --button "Quit"\!application-exit:1
                       --button "Manage"\!control-center2:2
                       --button "Launch"\!gtk-ok:0
                      )
    local done=0
    while [[ $done == 0 ]]; do
        # List all filenames in config dir, without extension
        local NAMES
        NAMES=$( (cd "$CONFIGDIR" && /bin/ls -1 -- *.dcv 2>/dev/null) | sed 's/\.dcv$//')

        local result
        result=$(echo "$NAMES" | yad --list "${GUI_OPTIONS[@]}" --column=Machine --separator "")
        local status=$?
        case $status in
            0 ) # OK
                if [[ -z $result ]]; then
                    show_error "Must choose a connection"
                    run_gui
                else
                    echo Running "$DCVVIEWER" "${DCVVIEWER_OPTIONS[@]}" "${CONFIGDIR}/${result}.dcv"
                    ("$DCVVIEWER" "${DCVVIEWER_OPTIONS[@]}" "${CONFIGDIR}/${result}.dcv") &
                    #exit 0
                fi
                ;;
            1 ) # Cancel
                exit 1
                ;;
            2 ) # Manage (create/delete connections)
                run_manage
                # after this, loop around and show gui
                ;;
        esac
    done
}

run_manage () {
    # Manage shows all existing connections, but you can add/delete
    local done=0
    while [[ $done == 0 ]]; do
        local NAMES
        NAMES=$( (cd "$CONFIGDIR" && /bin/ls -1 -- *.dcv 2>/dev/null) | sed 's/\.dcv$//')

        local result
        local MANAGE_OPTIONS=(--height 300 --window-icon=control-center2 --centered --borders=10 --title "Manage DCV Connections"
                              --text "Select a connection to delete, \nor press <b>Add</b> to create a new one"
                              --text-align=center
                              --column="Connection to delete"
                              --separator=""
                              --no-click --ellipsize end
                              --button "Cancel"\!gtk-cancel:1
                              --button "Add..."\!list-add:0
                              --button "Delete"\!gtk-delete:2
                             )
        result=$(echo "$NAMES" | yad --list "${MANAGE_OPTIONS[@]}")
        local status=$?
        case $status in
            0 ) # Add
                run_create
                done=1
                ;;
            1 ) # Cancel
                done=1
                ;;
            2 ) # Delete
                local fname="${CONFIGDIR}/${result}.dcv"
                [[ -e $fname ]] && rm "$fname"
                # show dialog again
                ;;
        esac
    done
}

run_create () {
    local CREATE_OPTIONS=(--height=275 --width=500 --margins=10 --borders=15 --window-icon=list-add --centered  --title "Create DCV Connection"
                          --text "Connection Details:"
                          --field "Connection Name" ""
                          --field "Host Name/IP" ""
                          --field User ""
                          --field Port:NUM "$DEFAULT_PORT"
                         )
    # Show the Create GUI form
    result=$(yad --form "${CREATE_OPTIONS[@]}")
    local status=$?
    if [[ $status != 0 ]]; then
        # Cancel -- go back to main GUI
        run_gui
    fi

    IFS="|" read -r connection_name ip user port <<< "$result"
    connection_name="${connection_name//\//_}" # remove slashes
    if [[ -z $connection_name || -z $ip || -z $port ]]; then
        show_error "Connection name, IP addr and port must all be specified."
        run_gui
    fi
    local fname="${CONFIGDIR}/${connection_name}.dcv"
    if [[ -e "$fname" ]]; then
        show_error "Connection $fname already exists; please remove it or use a different name"
        exit 1
    fi
    # Create the file
    {
        echo "[connect]"
        echo "host=$ip"
        echo "port=$port"
        echo "user=$user"
        echo
        echo "[version]"
        echo "format=1.0"
    } > "$fname"

    # Now pop up the GUI again so they can use it
    run_gui
}



# Do it
check_prereqs
run_gui