From d48043eab4deaaeda0f4795b183501116ade247c Mon Sep 17 00:00:00 2001
From: Christian Wolf <git@christianwolf.email>
Date: Mon, 22 Nov 2021 12:10:42 +0100
Subject: [PATCH] Create initial version

---
 move-mails.sh | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100755 move-mails.sh

diff --git a/move-mails.sh b/move-mails.sh
new file mode 100755
index 0000000..7bb8c8b
--- /dev/null
+++ b/move-mails.sh
@@ -0,0 +1,89 @@
+#!/bin/bash
+
+FOLDER_FROM=''
+FOLDER_TO=''
+DAYS=20
+
+print_help () {
+    cat << EOF
+Usage:
+  $(basename "$0") <options>
+
+Possible options:
+    -f|--from <folder>  Folder where to look for mails
+    -t|--to <folder>    Folder to put outdated mails
+    -d|--days <days>    Number of days to keep the mails
+EOF
+}
+
+while [ $# -gt 0 ]
+do
+    case "$1" in
+        --from|-f)
+            FOLDER_FROM="$2"
+            shift
+            ;;
+        --to|-t)
+            FOLDER_TO="$2"
+            shift
+            ;;
+        --days|--day|-d)
+            DAYS="$2"
+            shift
+            ;;
+        --help|-h)
+            print_help
+            exit
+            ;;
+        *)
+            echo "Unrecognized option: $1"
+            print_help
+            exit 1
+            ;;
+    esac
+    shift
+done
+
+ensure_mail_folder () {
+    local folder="$1"
+    if ! echo "$folder" | grep '/cur/*$' > /dev/null; then
+        folder="$folder/cur/"
+    fi
+
+    if [ ! -d "$folder" -o ! -w "$folder" -o ! -r "$folder" -o ! -x "$folder" ]; then
+        echo "This is no valid folder: $folder"
+        exit 1
+    fi
+    
+    echo -n "$folder"
+}
+
+if [ -z "$FOLDER_FROM" ]; then
+    echo "There is no folder given to read the mails from. Please provide it with --from"
+    exit 1
+fi
+
+if [ -z "$FOLDER_TO" ]; then
+    echo "There is no folder given to put the outdated mails. Please provide it with --to"
+    exit 1
+fi
+
+FOLDER_FROM=$(ensure_mail_folder "$FOLDER_FROM")
+FOLDER_TO=$(ensure_mail_folder "$FOLDER_TO")
+
+if [ ! "$DAYS" -ge 0 ]; then
+    echo 'No valid number of days given.'
+    exit 1
+fi
+
+find "$FOLDER_FROM" -type f -mtime +$DAYS | while read l
+do
+    suffix=$(echo "$l" | grep -o ',[^,]*$')
+    
+    if ! echo "$suffix" | grep 'S' > /dev/null ; then
+        # echo Unseen Mail $l
+        continue
+    fi
+    
+    mv -n "$l" "$FOLDER_TO"
+done