Add openhab-cli backup/restore to menu 50 (#910)

* added openhab-cli backup/restore implementation to 50 menu

Signed-off-by: Markus Storm <[email protected]>

functions/backup.bash

@@ -1,5 +1,32 @@
 #!/usr/bin/env bash
 
+filebrowser() {
+  bkppath=/var/lib/openhab2/backups
+  # shellcheck disable=SC2164,SC2012
+  bkpfile=$(cd ${bkppath}; ls -lthp openhab2-backup-* 2>/dev/null | head -20 | awk -F ' ' '{ print $9 " " $5 }')
+}
+
+backup_openhab_config() {
+  infotext="You have successfully created a backup of your openHAB configuration."
+  out=$(openhab-cli backup | tail -2 | head -1 | awk -F ' ' '{print $NF}')
+  msg="${infotext}\\n\\nFile is ${out}"
+  whiptail --title "Created openHAB config backup" --msgbox "$msg" 11 78
+}
+
+restore_openhab_config() {
+  filebrowser
+  if [[ -z "$bkpfile" ]]; then whiptail --title "Could not find backup" --msgbox "We could not find any configuration backup file in the storage dir ${bkppath}" 8 80; return 0; fi
+  # shellcheck disable=SC2086
+  if ! fileselect=$(whiptail --title "Restore openHAB config" --cancel-button Cancel --ok-button Select  --menu "\\nSelect your backup from most current 20 files below:" 30 60 20 $bkpfile 3>&1 1>&2 2>&3); then return 0; fi
+  cond_redirect systemctl stop openhab2
+  if echo "y" | openhab-cli restore "${bkppath}/${fileselect}"; then
+    whiptail --msgbox "Your selected openHAB configuration was successfully restored." 8 70
+  else
+    whiptail --msgbox "Sadly, there was a problem restoring your selected openHAB configuration." 8 70
+  fi
+  cond_redirect systemctl start openhab2
+}
+
 create_backup_config() {
   local config=$1
   local confdir=/etc/amanda/${config}

functions/menu.bash

@@ -160,16 +160,17 @@ show_main_menu() {
 
   elif [[ "$choice" == "50"* ]]; then
     choice2=$(whiptail --title "Welcome to the openHABian Configuration Tool $(get_git_revision)" --menu "Setup Options" 10 116 3 --cancel-button Back --ok-button Execute \
-    "50 | Amanda Backup documentation "   "Read this before installing the Amanda backup software" \
-    "51 | Amanda Backup"                  "Set up Amanda to backup your openHAB config and openHABian box" \
+    "50 | Backup openHAB config"      "Backup the current active openHAB configuration" \
+    "51 | Restore an openHAB config"  "Restore a previous openHAB configuration from backup" \
+    "52 | Amanda System Backup"       "Set up Amanda to comprehensively backup your complete openHABian box" \
     3>&1 1>&2 2>&3)
     if [ $? -eq 1 ] || [ $? -eq 255 ]; then return 0; fi
-    wait_for_apt_to_finish_update
     case "$choice2" in
-      50\ *) whiptail --textbox /opt/openhabian/docs/openhabian-amanda.md --scrolltext 25 116 ;;
-      51\ *) amanda_setup ;;
+      50\ *) backup_openhab_config ;;
+      51\ *) restore_openhab_config ;;
+      52\ *) wait_for_apt_to_finish_update && amanda_setup ;;
       "") return 0 ;;
-      *) whiptail --msgbox "A not supported option was selected (probably a programming error):\\n  \"$choice2\"" 8 80 ;;
+      *) whiptail --msgbox "A non supported option was selected (probably a programming error):\\n  \"$choice2\"" 8 80 ;;
     esac
 
   elif [[ "$choice" == "60"* ]]; then
@@ -213,5 +214,5 @@ show_main_menu() {
   fi
 
   # shellcheck disable=SC2154,SC2181
-  if [ $? -ne 0 ]; then whiptail --msgbox "There was an error or interruption during the execution of:\\n  \"$choice\"\\n\\nPlease try again. If the error persists, please read /opt/openhabian/docs/openhabian-DEBUG.md or $repositoryurl/docs/openhabian-DEBUG.md how to proceed." 12 60; return 0; fi
+  if [ $? -ne 0 ]; then whiptail --msgbox "There was an error or interruption during the execution of:\\n  \"$choice\"\\n\\nPlease try again. If the error persists, please read /opt/openhabian/docs/openhabian-DEBUG.md or https://github.com/openhab/openhabian/blob/master/docs/openhabian-DEBUG.md how to proceed." 12 70; return 0; fi
 }