From 342f93dc9e0d917e1f05f5d365737494fbdeffd8 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Mon, 15 Apr 2024 11:58:49 +0200
Subject: qr code generator

---
 netzbon/generate-qr.sh | 40 ++++++++++++++++++++++++++++++++++++++++
 netzbon/qr.tex.j2      | 14 ++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100755 netzbon/generate-qr.sh
 create mode 100644 netzbon/qr.tex.j2

diff --git a/netzbon/generate-qr.sh b/netzbon/generate-qr.sh
new file mode 100755
index 0000000..e5c01c6
--- /dev/null
+++ b/netzbon/generate-qr.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+# This script is in the public domain.
+#
+# Call with the JSON file (like test.json) with
+# an array of merchants to generate letters for!
+#
+# You must export
+#
+# export BASE_URL=https://e.netzbon-basel.ch/
+#
+# before running this script!
+#
+
+set -eu
+LENGTH=$(jq length < $1)
+echo "Generating $LENGTH QR codes for ${BASE_URL}"
+DOMAIN=$( echo "${BASE_URL}" | sed -e "s/https:\/\///" | sed -e "s/\/$//")
+mkdir -p qre
+mkdir -p tmp
+
+for n in $(seq 1 $LENGTH)
+do
+    echo "Processing merchant $n"
+    INDEX=$(expr $n - 1 || true)
+    ID=$(jq -r .[$INDEX].id < $1)
+
+    jq ".[$INDEX]" < $1 | jq '.domain="'"${DOMAIN}"'"' > "tmp/${ID}.json"
+    cd tmp
+    ../render.py "${ID}.json" < ../qr.tex.j2 > "${ID}.tex"
+    pdflatex "${ID}.tex" < /dev/null &> /dev/null || true
+    pdflatex "${ID}.tex" < /dev/null &> /dev/null || true
+    pdflatex "${ID}.tex" < /dev/null
+    mv "${ID}.pdf" ../qre/
+    cd ..
+
+    echo "Done with ${ID}"
+done
+
+pdftk qre/*.pdf cat output qr.pdf
+echo "Combined letters are in 'qr.pdf'"
diff --git a/netzbon/qr.tex.j2 b/netzbon/qr.tex.j2
new file mode 100644
index 0000000..52db22e
--- /dev/null
+++ b/netzbon/qr.tex.j2
@@ -0,0 +1,14 @@
+\documentclass[a4paper]{minimal}
+\usepackage[
+  paperwidth=53mm,
+  paperheight=53mm,
+  total={53mm,53mm}]{geometry}
+\usepackage[nolinks,final,forget]{qrcode}
+
+\begin{document}
+\ \vskip-3mm
+\begin{center}
+\qrcode[hyperlink,level=M,height=45mm]{taler://pay-template/backend.{{data.domain}}/instances/{{data.id}}/default}
+\end{center}
+\vfill
+\end{document}
-- 
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