# ---
# Delete User
# ---

# see: https://docs.mattermost.com/manage/command-line-tools.html#mattermost-user-delete


# There are two levels in user deactivation/deletion:
#
# The first one is user deactivation which is what you performed. After deactivating a user, 
# that user becomes archived and you can still search him/her and read their messages in 
# channels.
#
# The second is user deletion. You can do this via a CLI command. Note that when you permanently 
# delete a user, all their posts and past activities will get permanently deleted.


# Permanently delete a user and all related information, including posts from the database.
#
# Requirement:
#    Set "EnableAPIUserDeletion" to "true" in file /opt/mattermost/config/config.json and restart mattermost
#
#     /opt/mattermost/bin/mmctl user delete <users>
#
# Note:
#    Does not delete content from the file storage. You can manually delete all file uploads 
#    for a given user as uploads contain the CreatorId field. User profile pictures are stored 
#    in data/users/<userid>/profile.png.


# Set "EnableAPIUserDeletion" to "true" in file /opt/mattermost/config/config.json
#
perl -i -n -p -e "s/^(\s*\"EnableAPIUserDeletion\":).*$/\1 true,/" /opt/mattermost/config/config.json

# Restart Mattermost
#
systemctl restart mattermost

usr_to_delete="
   a.marinou-strohm
   angelika
   bennie
   clarissa
   david
   fabian
   georg
   hanna
   hannahnieswand
   leonie
   leoniestetter
   lilian
   lisa
   lsachenbacher
   ludwig
   klaudia
   mads
   owain
   stina
   tim_vallee
   viktar
"

clear
echo ""
for _user in $usr_to_delete ; do
   echo ""
   echo $_user
   if $(mmctl user list 2> /dev/null | grep -q $_user) ; then
      echo -n "   Delete user '$_user' [yes/no]: "
      read OK
      OK="${OK,,}"
      while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
         echo -n "   Wrong answer  - repeat [yes/no]: "
         read OK
         OK="${OK,,}"
      done 

      if [[ $OK = "yes" ]] ; then

         # Delete user
         #
         /opt/mattermost/bin/mmctl user delete $_user --confirm > /dev/null 2>&1

         if [[ $? -ne 0 ]]; then
            echo -e "   [ \033[31m\033[1mError\033[m ] Deleting user '$_user' failed!"
         else
            echo -e "   [ \033[32m\033[1mInfo\033[m ] User '$_user' was deleted."
         fi
      else
         echo -e "   [ \033[33m\033[1mWarning\033[m ] User '$_user' was omitted"
      fi
   else
      echo -e "   [ \033[31m\033[1mError\033[m ] User '$_user' not found!"
   fi
done

# Set "EnableAPIUserDeletion" to "false" in file /opt/mattermost/config/config.json
#
perl -i -n -p -e "s/^(\s*\"EnableAPIUserDeletion\":).*$/\1 false,/" /opt/mattermost/config/config.json

# Restart Mattermost
#
systemctl restart mattermost