ADD safety-net ARCHIVE to the iPhone synchronization

sync-iPhone.sh

@@ -7,6 +7,9 @@ library_list=("libimobiledevice")
 sync_folder="$HOME/iPhone"
 sync_mount="${sync_folder}/.mnt"
 sync_data="${sync_folder}/data"
+sync_archive="${sync_folder}/archive"
+current_date=$(date +%F)
+safety_dir="changes_${current_date}"
 
 # Check if required programs are installed
 for program in "${program_list[@]}"; do
@@ -64,8 +67,13 @@ TO="${sync_data}/"
 
 while true; do
 	echo "** Synchronization from ${FROM} to ${TO} **"
-	read -n 1 -p "Action: (s)ync & delete / (n)ormal sync / (m)ount only & exit / (c)ancel? " response
-#	read -n 1 -p"Action: Sync iPhone and delete old files (y)es/(m)ount only/(n)o/(c)ancel? " response
+	echo "Options:"
+	echo "  (s) sync & delete from 'data' (matches iPhone state)"
+	echo "  (n) normal sync to 'data' (keeps files deleted on iPhone)"
+	echo "  (a) safety-net ARCHIVE (syncs 'data' to 'archive', backups changed files, NEVER deletes)"
+	echo "  (m) mount only & exit"
+	echo "  (c) cancel"
+	read -n 1 -p "Action: " response
 	echo
 	case ${response} in
 		[Nn]* )
@@ -82,12 +90,25 @@ while true; do
 			echo "iPhone remains mounted at ${sync_mount}. Remember to unmount manually later!"
 			exit 0 
 			;;
+		[Aa]* )
+			# Ensure the archive folder exists
+			mkdir -p "${sync_archive}"
+			if [ ! -d "${sync_data}" ] || [ -z "$(ls -A "${sync_data}")" ]; then
+				echo "Error: The 'data' folder is empty or does not exist. Run a sync (n or s) first!"
+			else
+				echo "Starting safety-net archive backup from ${sync_data} to ${sync_archive}..."
+				# Safety-net sync: moves modified/overwritten files into a dated subfolder
+				rsync -avP --backup --backup-dir="${safety_dir}" "${sync_data}/" "${sync_archive}/"
+				echo "Archive completed. Safe directory for modified files today: ${sync_archive}/${safety_dir}"
+			fi
+			break
+			;;
 		[Cc]* )
 			echo "Synchronization skipped by user."
 			break
 			;;
 		* )
-			echo "Invalid selection. Please choose y, n, m, or c."
+			echo "Invalid selection. Please choose s, n, a, m, or c."
 			;;
 	esac
 done