notifications-yo-notifications

#!/bin/bash

####################################################################################################################################
# 
# Generic script for use in Notification policies adapted from one created by user mm2270 at 
# https://www.jamf.com/jamf-nation/discussions/26957/sending-notifications-with-yo-scheduler-jamf
#
# The script leverages the 'Yo.app' application at /Library/MacSD/Scripts to send customised notifications to the scoped managed 
# Macs at the frequency designated in the policy. It does so by locally generating an on-the-fly script that is passed to the Yo app
# to be run as the logged-in user.
# 
# See https://github.com/sheagcraig/yo for full details on 'Yo' and its script arguments etc.
#
# Date: Mon  4 Mar 2019 09:19:13 GMT
# Version: 0.4
# Author: ganders1
#
####################################################################################################################################

## Script parameters
Title="$4"            ## Title for Yo notification (Required) - Maximum 37 characters.
Msg="$5"              ## Message for Yo notification (Required) - Maximum 37 characters.
Btn="$6"              ## Custom button name (Optional, but button name should be set if using a button action),
BtnAct="$7"           ## Action for button (Optional) - e.g. full URL or path to app to open.

## Path to the script to run
scriptRunDir="/private/var/scripts/"

## Create the directory to house the script if not present
if [ ! -d "$scriptRunDir" ]; then
    mkdir -p "$scriptRunDir"
fi

## Path to Yo.app or custom version of the tool. Must include path to the executable
Yoapp="/Library/MacSD/Scripts/Yo.app/Contents/MacOS/Yo"

## Check to make sure the app is where it should be or we can't do much
if [ ! -e "$Yoapp" ]; then
    echo "Yo application could not be found in the expected location. Must exit."
    exit 1
fi

## Check to make sure a title and message string were passed to the script
if [[ -z "$Title" ]] || [[ -z "$Msg" ]]; then
    echo "Either the Title or Message strings have been left blank. Please enter a value for Title in \$4 and a message value in \$5 and try again."
    exit 1
fi

## Get Logged in User name
loggedInUser=`python -c 'from SystemConfiguration import SCDynamicStoreCopyConsoleUser; import sys; username = (SCDynamicStoreCopyConsoleUser(None, None, None) or [None])[0]; username = [username,""][username in [u"loginwindow", None, u""]]; sys.stdout.write(username + "\n");'`

## Get Logged in User UID
loggedInUID=$(id -u "$loggedInUser")

## Make sure someone is logged in or no message display is possible
if [[ "$loggedInUser" == "root" ]] && [[ "$loggedInUID" == 0 ]]; then
    echo "No user is logged in. Skipping display of notification until next run."
    exit 0
fi

## This function runs the temp script as the logged in user
function runScriptAsUser ()
{

/bin/launchctl asuser "$loggedInUID" sudo -iu "$loggedInUser" "/private/var/scripts/Yo_run.sh"

}

## This function creates a temp script to run Yo with the parameters and text strings passed to the main script
function createScript ()
{

cat << EOD > /private/var/scripts/Yo_run.sh
#!/bin/bash

$(echo "${contents}")

EOD

/bin/chmod +x /private/var/scripts/Yo_run.sh

runScriptAsUser

}


## Create the script contents based on if a button string was passed and/or a button action was also passed
if [[ ! -z "$Btn" ]] && [[ ! -z "$BtnAct" ]]; then
    echo "Creating notice with button + action"
    contents="\"${Yoapp}\" -t \"${Title}\" -n \"${Msg}\" -b \"${Btn}\" -a \"${BtnAct}\" -z \"None\" -p"
    createScript
elif [[ ! -z "$Btn" ]] && [[ -z "$BtnAct" ]]; then
    echo "Creating notice with button only"
    contents="\"${Yoapp}\" -t \"${Title}\" -n \"${Msg}\" -b \"${Btn}\" -z \"None\" -p"
    createScript
elif [[ -z "$Btn" ]]; then
    echo "Creating notice with no custom button"
    contents="\"${Yoapp}\" -t \"${Title}\" -n \"${Msg}\" -z \"None\" -p"
    createScript
fi