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28 lines
836 B
Bash
Executable File
28 lines
836 B
Bash
Executable File
#!/bin/sh
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# image2card.sh (Oct 2015) by Jan-Piet Mens
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# Usage: image2card imagefile "full name"
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#
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# Requires `convert' from ImageMagick.
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# Read image, convert to PNG, forcing a 40x40 size and encode
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# to BASE64. Create a JSON payload to be published to
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# owntracks/username/device/info
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#
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# You probably want to do this:
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#
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# image2card.sh filename.jpg "Jane Jolie" > card.json
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# mosquitto_pub -t owntracks/jane/phone -f card.json
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#
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# Note: the two commands cannot be piplelined (mosquitto_pub -l)
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# because of a bug in mosquitto_pub: https://bugs.eclipse.org/bugs/show_bug.cgi?id=478917
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[ $# -ne 2 ] && { echo "Usage: $0 image-file full-name" >&2; exit 2; }
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imagefile="$1"
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fullname="$2"
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imgdata=$(convert "${imagefile}" -resize '40x40!' - | base64)
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cat <<EndOfFile
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{"_type":"card","name":"${fullname}","face":"${imgdata}"}
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EndOfFile
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