swiftDialog Pre-install.bash

#!/bin/bash
####################################################################################################
#
# ABOUT
#
#   swiftDialog Pre-install
#   Pre-install Company Logo for swiftDialog v2 Notifications
#
#   See: https://snelson.us/2022/11/macos-notifications-via-swiftdialog-0-0-1/
#
####################################################################################################
#
# HISTORY
#
#   Version 0.0.1, 14-Nov-2022, Dan K. Snelson (@dan-snelson)
#       Original proof-of-concept version
#
#   Version 0.0.2, 16-Nov-2022, Dan K. Snelson (@dan-snelson)
#       Added "last logged-in user" logic
#       Added check for Dialog.png (with graceful exit)
#
####################################################################################################



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#
# Variables
#
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Global Variables
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

scriptVersion="0.0.2"
export PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin/
loggedInUser=$( echo "show State:/Users/ConsoleUser" | scutil | awk '/Name :/ { print $3 }' )
scriptLog="${4:-"/var/tmp/org.churchofjesuschrist.log"}"



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#
# Functions
#
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Client-side Script Logging
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

function updateScriptLog() {
    echo -e "$( date +%Y-%m-%d\ %H:%M:%S ) - ${1}" | tee -a "${scriptLog}"
}



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#
# Pre-flight Checks
#
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Confirm script is running as root
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

if [[ $(id -u) -ne 0 ]]; then
    echo "This script must be run as root; exiting."
    exit 1
fi



# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Validate logged-in user
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

if [[ -z "${loggedInUser}" || "${loggedInUser}" == "loginwindow" ]]; then
    echo "No user logged-in; failing back to last logged-in user …"
    loggedInUser=$( last -1 -t ttys000 | awk '{print $1}' )
fi



# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Client-side Logging
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

if [[ ! -f "${scriptLog}" ]]; then
    touch "${scriptLog}"
    updateScriptLog "*** Created log file via script ***"
fi



# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Logging preamble
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

updateScriptLog "\n\n###\n# swiftDialog Pre-install (${scriptVersion})\n###\n"



# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Validate Dialog Branding Image
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

updateScriptLog "Validate 'Dialog.png' …"
if [[ -f "/Library/Application Support/Dialog/Dialog.png" ]]; then
    updateScriptLog "The file '/Library/Application Support/Dialog/Dialog.png' already exists; exiting."
    exit 0
else
    updateScriptLog "The file '/Library/Application Support/Dialog/Dialog.png' does not exist; proceeding …"
fi



# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Create Dialog directory
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

if [[ ! -d "/Library/Application Support/Dialog/" ]]; then
    updateScriptLog "Creating '/Library/Application Support/Dialog/' …"
    mkdir -p "/Library/Application Support/Dialog/"
else
    updateScriptLog "The directory '/Library/Application Support/Dialog/' exists …"
fi



# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Copy Self Service Branding Image
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

updateScriptLog "Copy 'brandingimage.png' …"
cp -v "/Users/${loggedInUser}/Library/Application Support/com.jamfsoftware.selfservice.mac/Documents/Images/brandingimage.png" "/Library/Application Support/Dialog/Dialog.png"



# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Validate Dialog Branding Image
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

updateScriptLog "Validate 'Dialog.png' …"
if [[ ! -f "/Library/Application Support/Dialog/Dialog.png" ]]; then
    updateScriptLog "Error: The file '/Library/Application Support/Dialog/Dialog.png' was NOT found."
    exit 1
else
    updateScriptLog "The file '/Library/Application Support/Dialog/Dialog.png' was create sucessfully."
    ls -lah "/Library/Application Support/Dialog/Dialog.png"
fi



# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Exit
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

updateScriptLog "End-of-line."

exit 0