From 26184588b092df470da2961898025252f4f5a4a7 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Sat, 13 Nov 2021 14:13:47 +0100
Subject: collect-tos-for-alpine-addressbook new

---
 collect-tos-for-alpine-addressbook | 41 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100755 collect-tos-for-alpine-addressbook

diff --git a/collect-tos-for-alpine-addressbook b/collect-tos-for-alpine-addressbook
new file mode 100755
index 0000000..937642c
--- /dev/null
+++ b/collect-tos-for-alpine-addressbook
@@ -0,0 +1,41 @@
+#!/bin/bash
+
+sed '
+  :a
+    N
+    s/\n\s\+/ /
+    ta
+  P
+  D
+' tmp/header \
+| sed -n '
+  s@^\(bcc\|Bcc\|BCC\|cc\|Cc\|CC\|To\|Reply-To\): @@
+  T
+  :b
+    s@^\(\([^"]*"[^"]*"\)*[^"]*\),\s\+@\1\n@g
+    tb
+  p
+' \
+| sed '
+  s#^\(.*\S\)\s*<\(\S\+@\S\+\)>$#\2 \1#
+  t
+  /^\S\+@\S\+$/!d
+' \
+| sort -uf \
+| while read -r email comment; do
+  printf '%s %s %s\n' \
+    "${#comment}" \
+    "$(echo "$comment" | base64 -w0)" \
+    "${email}"
+done \
+| sort -k3,3 -k1nr,1 \
+| uniq -f2 \
+| while read -r _ comment email; do
+  printf '\t%s\t%s\n' \
+    "$(
+      printf '%s\n' "${comment}" \
+      | base64 -d \
+      | sed 's@^\(["'"'"']\)\(.*\)\1@\2@'
+    )" \
+    "${email}"
+done
-- 
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