#########################################################################################
#
#               Ownership taker
#
#########################################################################################
# this script can be use to take the ownership of an account
# specify your name in the list of $list_of_known_users with your autologonname (put your login name if you don't know your Pbkdf2 Hash)
# and put the name of your object in the variable $own_user_objectName
# then execute the script, specifiy the targeted user and the targeted database(s)
# if you want to revert back the configuration, replace the variable $own_user_objectName with the name of the object of the person you took the ownership

#########################################################################################
#
#               Database Value
#
#########################################################################################



#other
#$DBInstance = 'DB NAME'#


#$DBACredential = Get-Credential -UserName pgadmin  -Message "Credentials for $DBInstance"
#DBPassword = $DBACredential.GetNetworkCredential().Password
#$DBUsername = $DBACredential.UserName


#Database=$database
$ConnectionString = "Server=$DBInstance;User Id=$DBUsername;Password=$DBPassword;TrustServerCertificate=True"
$VerbosePreference = 'Continue'


#########################################################################################
#
#               User value
#
#########################################################################################

$list_of_known_users = [ordered]@{
  Admin = [PSCustomObject]@{             
    "Name"="Admin"
    "username"="admin"
    "autologonname"=""
    };
  Administrator = [PSCustomObject]@{             
    "Name"="Administrator"
    "username"="administrator"
    "autologonname"=""
    };    
  Anastasia = [PSCustomObject]@{             
    "Name"="Anastasia"
    "username"="akroupkina"
    "autologonname"=""
    };
  Henry = [PSCustomObject]@{             
    "Name"="Henry"
    "username"="hchung"
    "autologonname"=""
    }; 
  Frans = [PSCustomObject]@{             
    "Name"="Frans"
    "username"="frans"
    "autologonname"=""
    }; 
  Blake = [PSCustomObject]@{             
    "Name"="Blake"
    "username"="bparrish"
    "autologonname"=""
    }; 
  Besfort = [PSCustomObject]@{             
    "Name"="Besfort"
    "username"="bhyseni"
    "autologonname"=""
    };
  Kyle = [PSCustomObject]@{             
    "Name"="Kyle"
    "username"="kpatel"
    "autologonname"=""
    };  
  Pierre = [PSCustomObject]@{             
    "Name"="Pierre"
    "username"="pierretotal"
    "autologonname"=""
    }
}

#########################################################################################
#               Fill with your user object name
#########################################################################################
$own_user_objectName = 'Pierre'

$ownAutologonname = $list_of_known_users.$own_user_objectName.autologonname


#get the target 
$targetObjectName = $list_of_known_users.keys |Out-GridView -PassThru -Title "Select the target"

$targetName = $list_of_known_users.$targetObjectName.Name
$targetUserName = $list_of_known_users.$targetObjectName.Username

Write-output "You selected the user $targetName to take ownership "

$QuerySelectDatabases= "SELECT name FROM sys.databases order by name"
$targeted_DB= Invoke-Sqlcmd -ConnectionString $ConnectionString -Query $QuerySelectDatabases |Out-GridView -PassThru -Title "Select the targeted databases"


foreach( $database in $targeted_DB ) {
  $DB_name = $database.Name
  write-output "updating $DB_name"

  

  $queryVerifyPresenceUser = "
    SELECT
        CASE WHEN EXISTS 
        (
            select pk_userid,username, createcomputer , firstname, lastname , autologonname, isactive from $DB_name.dbo.tblUser where username = '$targetUserName'
        )
        THEN 'TRUE'
        ELSE 'FALSE'
    END
  "
  write-output $queryVerifyPresenceUser
  $boolean_presence_users = Invoke-Sqlcmd -ConnectionString $ConnectionString -Query $queryVerifyPresenceUser
  write-verbose $boolean_presence_users.Column1
  if($boolean_presence_users.Column1 -eq "FALSE"){
    write-output "the user doesn't exist in the following database : $DB_name"
    continue
  }
  
  $QueryUpdatingUser= "
    update $DB_name.dbo.tblUser
    set isactive = 1,
    autologonname = '$ownAutologonname'
    where username = '$targetUserName';
    "
  Write-Output "Query to execute :"
  Write-Output $QueryUpdatingUser
  Write-Warning "Are you sure to proceed ?" -WarningAction Inquire
  Invoke-Sqlcmd -ConnectionString $ConnectionString -Query $QueryUpdatingUser
  
}