mn2jpg

#!/usr/bin/env bash

# Assign help text to variable for user later
HELP="Usage: mn2jpg [SOURCE] [DEST], where [SOURCE] is a MindNode file"
NUMPARAMS="Error: Incorrect number of parameters"

# If the user supplied no parameters, then provide help text
if [ $# -eq 0 ]; then
    echo $NUMPARAMS
    echo
    echo $HELP
    echo
    exit
fi

# If the user supplied "--help", then provide help text
if [ $1 = "--help" ]; then
    echo $HELP
    echo
    exit
fi

# Ensure that exactly 2 parameters were given
# Display error message and help text otherwise
if [ $# -ne 2 ]; then
    echo $NUMPARAMS
    echo
    echo $HELP
    echo
    exit
fi

# Check that source exists and is a normal file
# Display error message otherwise
if [ ! -f $1 ]; then
    echo "Error: Invalid source file supplied"
    echo
    exit
fi

# Assign parameters to variables for use later
SRC=$1
DST=$2

# Use unzip to extract the QuickLook preview file as a standalone JPG file
# Assumes unzip is installed and in the path
unzip -j -p "$SRC" QuickLook/Preview.jpg > "$DST"