#!/bin/bash
#==============================================================================
# Copyright and license info is available in the LICENSE file included with
# the Server Deployment Package (SDP), and also available online:
# https://swarm.workshop.perforce.com/projects/perforce-software-sdp/view/main/LICENSE
#------------------------------------------------------------------------------
set -u

# p4login generates a login ticket for the SDP super user.  It is called
# from cron scripts, and so does not normally generate output to stdout or
# stderr.
#
# Normally output (stdout and stderr) is logged in $LOGS/p4login.log,
# unless unless SDP_INSTANCE isn't defined, in which case it bails
# immediately.
#
# An exit code of 0 indicates a valid login ticket exists, while a
# non-zero exit code indicates a failure to login.

export SDP_INSTANCE=${SDP_INSTANCE:-Undefined}
declare -i SDP_ALWAYS_LOGIN=${SDP_ALWAYS_LOGIN:-1}
declare DateFormat='%a %Y-%m-%d %H:%M:%S %Z'
declare Cmd=

function bail () { echo -e "\nError: ${1:-Unknown Error}"; exit ${2:-1}; }

[[ $SDP_INSTANCE == Undefined ]] && bail "Error: SDP_INSTANCE not defined."

declare TicketExpiration=$($P4BIN -ztag -F %TicketExpiration% -p $P4PORT -u $P4USER login -s 2>/dev/null)
declare Log=$LOGS/p4login.log
echo "$(date +'%a %Y-%m-%d %H:%M:%S %Z'): Checking login status." > $Log

if [[ $TicketExpiration =~ [0-9]+ ]]; then
   # A 'long-term' ticket is one that expires more than a month (31 days + 1 second) from now.
   if [[ $TicketExpiration -ge 2678401 ]]; then
      echo "$(date +'%a %Y-%m-%d %H:%M:%S %Z'): Verified: User $P4USER logged into $P4PORT with a long-term ticket.  Login not required." >> $Log

      if [[ $SDP_ALWAYS_LOGIN -eq 1 ]]; then
         echo "Doing login anyway as SDP_ALWAYS_LOGIN is enabled." >> $Log
         Cmd="$P4BIN -p $P4PORT -u $P4USER -s login -a"
         echo Running: $Cmd >> $Log
         $Cmd < /p4/common/bin/adminpass >> $Log 2>&1
      fi

      exit 0
   else
      echo "$(date +'%a %Y-%m-%d %H:%M:%S %Z'): Warning: User $P4USER logged into $P4PORT with a short-term ticket.  Attempting to extend." >> $Log
      Cmd="$P4BIN -p $P4PORT -u $P4USER -s login -a"
      echo Running: $Cmd >> $Log
      $Cmd < /p4/common/bin/adminpass >> $Log 2>&1
      exit $?
   fi
else
   echo "$(date +'%a %Y-%m-%d %H:%M:%S %Z'): Warning: User $P4USER is not logged into $P4PORT.  Attempting to login." >> $Log
   Cmd="$P4BIN -p $P4PORT -u $P4USER -s login -a"
   echo Running: $Cmd >> $Log
   $Cmd < /p4/common/bin/adminpass >> $Log 2>&1
   exit $?
fi