Implement Nextcloud backups (optional) (#2354)

* Implement Nextcloud backups (optional)
* Add menu option for Nextcloud backups
* Create backup directory automatically
* Fix potential issue with url substitution
* Remove unused variable
* Ectract actions to functions with scoped vars

home.admin/00settingsMenuBasics.sh

@@ -32,6 +32,10 @@ echo "# map dropboxbackup to on/off"
 DropboxBackup="off"
 if [ ${#dropboxBackupTarget} -gt 0 ]; then DropboxBackup="on"; fi
 
+echo "map nextcloudbackup to on/off"
+NextcloudBackup="off"
+if [ $nextcloudBackupServer ] && [ $nextcloudBackupUser ] && [ $nextcloudBackupPassword ]; then NextcloudBackup="on"; fi
+
 echo "# map localbackup to on/off"
 LocalBackup="off"
 if [ ${#localBackupDeviceUUID} -gt 0 ] && [ "${localBackupDeviceUUID}" != "off" ]; then LocalBackup="on"; fi
@@ -110,6 +114,7 @@ if [ "${lndNode}" == "on" ]; then
   OPTIONS+=(k '-LND Accept Keysend' ${keysend})  
   OPTIONS+=(c '-LND Circuitbreaker (firewall)' ${circuitbreaker})  
   OPTIONS+=(u '-LND Auto-Unlock' ${autoUnlock})  
+  OPTIONS+=(x '-LND StaticChannelBackup on Nextcloud' ${NextcloudBackup})
   OPTIONS+=(d '-LND StaticChannelBackup DropBox' ${DropboxBackup})
   OPTIONS+=(e '-LND StaticChannelBackup USB Drive' ${LocalBackup})
   OPTIONS+=(l '-LND UPnP (AutoNAT)' ${autoNatDiscovery})
@@ -306,6 +311,22 @@ else
   echo "Dropbox backup setting unchanged."
 fi
 
+# Nextcloud process choice
+choice="off"; check=$(echo "${CHOICES}" | grep -c "x")
+if [ ${check} -eq 1 ]; then choice="on"; fi
+if [ "${NextcloudBackup}" != "${choice}" ]; then
+  echo "Nextcloud Setting changed .."
+  anychange=1
+  sudo -u admin /home/admin/config.scripts/nextcloud.upload.sh ${choice}
+  if [ "${choice}" =  "on" ]; then
+    # doing initial upload so that user can see result
+    source /mnt/hdd/raspiblitz.conf
+    sudo /home/admin/config.scripts/nextcloud.upload.sh upload /mnt/hdd/lnd/data/chain/${network}/${chain}net/channel.backup
+  fi
+else
+  echo "Nextcloud backup setting unchanged."
+fi
+
 # LocalBackup process choice
 choice="off"; check=$(echo "${CHOICES}" | grep -c "e")
 if [ ${check} -eq 1 ]; then choice="on"; fi

home.admin/_background.sh

@@ -368,6 +368,18 @@ do
           fi
         fi
 
+        # check if Nextcloud backups are enabled
+        if [ $nextcloudBackupServer ] && [ $nextcloudBackupUser ] && [ $nextcloudBackupPassword ]; then
+          echo "--> Offsite-Backup Nextcloud"
+          source <(sudo /home/admin/config.scripts/nextcloud.upload.sh upload ${localBackupPath})
+          source <(sudo /home/admin/config.scripts/nextcloud.upload.sh upload ${localTimestampedPath})
+          if [ ${#err} -gt 0 ]; then
+            echo "FAIL -  ${err}"
+          else
+            echo "OK - ${upload}"
+          fi
+        fi
+
       #else
       #  echo "Channel Backup File not changed."
       fi

home.admin/config.scripts/nextcloud.upload.sh

@@ -0,0 +1,109 @@
+#!/bin/bash
+
+if [ $# -eq 0 ] || [ "$1" = "-h" ] || [ "$1" = "-help" ]; then
+  echo "# script to upload a file to Nextcloud"
+  echo "# nextcloud.upload.sh on [server] [user] [password]"
+  echo "# nextcloud.upload.sh off"
+  echo "# nextcloud.upload.sh upload [filepath]"
+  echo "err='just informational output'"
+  exit 1
+fi
+
+source /mnt/hdd/raspiblitz.conf
+
+on() {
+  local server="${1}"
+  local user="${2}"
+  local password="${3}" 
+
+  sudo touch /home/admin/.tmp
+  sudo chmod 777 /home/admin/.tmp
+
+  if [ -z "${server}" ]; then
+    whiptail --title "Static Channel Backup on Nextcloud" --inputbox "Enter your Nextcloud server URL\nExample: https://cloud.johnsmith.com" 11 70 2>/home/admin/.tmp
+    server=$(cat /home/admin/.tmp)
+  fi
+
+  if [ -z "${user}" ]; then
+    whiptail --title "Static Channel Backup on Nextcloud" --inputbox "Enter your Nextcloud username" 11 70 2>/home/admin/.tmp
+    user=$(cat /home/admin/.tmp)
+  fi
+
+  if [ -z "${password}" ]; then
+    whiptail --title "Static Channel Backup on Nextcloud" --inputbox "Enter your Nextcloud password" 11 70 2>/home/admin/.tmp
+    password=$(cat /home/admin/.tmp)
+  fi
+
+  shred -u /home/admin/.tmp
+
+  if [ "${server}" ] && [ "${user}" ] && [ "${password}" ]; then
+    sudo sed -i '/nextcloudBackupServer=.*/d' /mnt/hdd/raspiblitz.conf
+    echo "nextcloudBackupServer=${server}" >> /mnt/hdd/raspiblitz.conf
+
+    sudo sed -i '/nextcloudBackupUser=.*/d' /mnt/hdd/raspiblitz.conf
+    echo "nextcloudBackupUser=${user}" >> /mnt/hdd/raspiblitz.conf
+
+    sudo sed -i '/nextcloudBackupPassword=.*/d' /mnt/hdd/raspiblitz.conf
+    echo "nextcloudBackupPassword=${password}" >> /mnt/hdd/raspiblitz.conf
+  else
+    echo "Please provide nextcloud server, username and password"
+    exit 1
+  fi
+}
+
+off() {
+  sudo sed -i '/nextcloudBackupServer=.*/d' /mnt/hdd/raspiblitz.conf
+  sudo sed -i '/nextcloudBackupUser=.*/d' /mnt/hdd/raspiblitz.conf
+  sudo sed -i '/nextcloudBackupPassword=.*/d' /mnt/hdd/raspiblitz.conf
+}
+
+upload() {
+  local filepath="${1}"
+
+  if [ -z "${filepath}" ]; then
+    echo "err='Missing argument: filepath'"
+    exit 1
+  fi
+
+  if [ -z "${nextcloudBackupServer}" ] || [ -z "${nextcloudBackupUser}" ] || [ -z "${nextcloudBackupPassword}" ]; then
+    echo "err='Nextcloud credentials are missing'"
+    exit 1
+  fi
+
+  local remoteDirUrl="$nextcloudBackupServer/remote.php/dav/files/$nextcloudBackupUser/raspiblitz/"
+  
+  # checking if remote directory exists
+  local response
+  response=$(curl "${remoteDirUrl}" \
+    --user "${nextcloudBackupUser}:${nextcloudBackupPassword}" \
+    --request PROPFIND \
+    --silent)
+
+  # if remote directory doesn't exist, we need to create it
+  if [[ "${response}" = *DAV\\Exception\\NotFound* ]]; then
+    curl "${remoteDirUrl}" \
+      --user "${nextcloudBackupUser}:${nextcloudBackupPassword}" \
+      --request MKCOL \
+      --silent
+  fi
+
+  if curl "${remoteDirUrl}" \
+    --user "${nextcloudBackupUser}:${nextcloudBackupPassword}" \
+    --upload-file "${filepath}" \
+    --silent;
+  then
+    echo "File ${filepath} has been uploaded"
+    echo "upload=1"
+  else
+    echo "err='File upload failed'"
+    echo "upload=0"
+    exit 1
+  fi
+}
+
+case "${1}" in
+  on) on "${2}" "${3}" "${4}" ;;
+  off) off ;;
+  upload) upload "${2}" ;;
+  *) echo "err=Unknown action: ${1}" ; exit 1 ;;
+esac