#!/bin/sh # image2card.sh # Copyright (C) 2015-2016 Jan-Piet Mens # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. # Usage: image2card imagefile "full name" # # Requires `convert' from ImageMagick. # Read image, convert to PNG, forcing a 192x192 size and encode # to BASE64. Create a JSON payload to be published to # owntracks/username/device/info # # You probably want to do this: # # image2card.sh filename.jpg "Jane Jolie" > card.json # mosquitto_pub -t owntracks/jane/phone/info -f card.json -r # # Note: the two commands cannot be piplelined (mosquitto_pub -l) # because of a bug in mosquitto_pub: https://bugs.eclipse.org/bugs/show_bug.cgi?id=478917 # If you have a newish version it should work fine. [ $# -ne 2 ] && { echo "Usage: $0 image-file full-name" >&2; exit 2; } imagefile="$1" fullname="$2" base64switch="" base64check=$(echo "jj" | base64 -w 0 > /dev/null 2>&1) [ "$?" -eq "0" ] && base64switch="-w 0" imgdata=$(convert "${imagefile}" -resize '192x192!' - | base64 $base64switch) cat <