#!/bin/bash



DIR=/mnt/2T/Backup




function echoe {
  echo [`date +"%Y-%m-%d %H:%M:%S.%N"` - backup.sh] $@
}

function mksym {
  # Name of symlink = $1
  # Date = $2
  # Directory = $3

  for i in {Builders,Lobbies,MiddleEarth,Halo,Trash,Siege}
  do
    if [ ! -d /root/ramdisk/snaps/$i ]
    then
      mkdir /root/ramdisk/snaps/$i/
    fi

    rm -rf /root/ramdisk/snaps/$i/$1
    echoe ---- Adding symlink from $DIR/$3/$2/ramdisk/$i/ to /root/ramdisk/snaps/$i/$1
    ln -s $DIR/$3/$2/ramdisk/$i/ /root/ramdisk/snaps/$i/$1
    echoe ---- Symlink added.
  done
}


FORMATMINUTE=%Y%m%d%H%M
FORMATHOURLY=%Y%m%d%H
FORMATDAILY=%Y%m%d
FORMATMONTHLY=%Y%m

ACTUALMINUTE=$(date +%M)
ACTUALHOUR=$(date +%H)
ACTUALDAY=$(date +%d)
ACTUALMONTH=$(date +%m)

MODULO=$((ACTUALMINUTE % 15))

#ACTUALMINUTE=0
#ACTUALHOUR=1
#ACTUALDAY=1
#ACTUALMONTH=1
#MODULO=0

DATEMINUTE=$(date +${FORMATMINUTE})
DATEHOURLY=$(date +${FORMATHOURLY})
DATEDAILY=$(date +${FORMATDAILY})
DATEMONTHLY=$(date +${FORMATDAILY})

OLDMINUTE=$(date --date="6 hours ago" +${FORMATMINUTE})
OLDHOURLY=$(date --date="24 hours ago" +${FORMATHOURLY})
OLDDAILY=$(date --date="60 days ago" +${FORMATDAILY})
OLDMONTHLY=$(date --date="2 years ago" +${FORMATMONTHLY})


echoe
echoe
echoe ----------
echoe Starting daily/monthly/hourly backup script.
echoe ----------

echoe Checking before the start of backup that happens every 15 minutes...
if [ $MODULO -eq 0 ]
then
  echoe -- Starting backup happening every 15 minutes...
  mkdir -p $DIR/Minutely/$DATEMINUTE/ramdisk
  rsync -a --exclude="snaps" /root/ramdisk/ $DIR/Minutely/$DATEMINUTE/ramdisk
  mksym lastminute $DATEMINUTE Minutely
  echoe -- Backup of every 10 minutes done.
fi

echoe Checking for hourly backup...

if [ $ACTUALMINUTE -eq 0 ]
then
  echoe -- Starting hourly backup...
  mkdir -p $DIR/Hourly/$DATEHOURLY/ramdisk
  rsync -a --exclude="snaps" /root/ramdisk/ $DIR/Hourly/$DATEHOURLY/ramdisk
  mksym lasthour $DATEHOURLY Hourly
  echoe -- Hourly backup done.
fi

echoe Checking for daily backup...

if [ $ACTUALHOUR -eq 1 ]
then
  echoe -- Starting daily backup...
  mkdir -p $DIR/Daily/$DATEDAILY/ramdisk
  rsync -a --exclude="snaps" /root/ramdisk/ $DIR/Daily/$DATEDAILY/ramdisk
  mksym yesterday $DATEDAILY Daily
  echoe -- Daily backup done.
fi

echoe Checking for monthly backup...

if [ $ACTUALDAY -eq 1 ]
then
  echoe -- Starting monthly backup...
  mkdir -p $DIR/Monthly/$DATEMONTHLY/ramdisk
  rsync -a --exclude="snaps" /root/ramdisk/ $DIR/Monthly/$DATEMONTHLY/ramdisk
  mksym lastmonth $DATEMONTHLY Monthly
  echoe -- Monthly backup done.
fi

echoe ---
echoe Old directory checks
echoe ---

echoe Checking for directory of every 10 minutes...

for REP in $DIR/Minutely/*
do
  if [ -d $REP ]
  then
    if [ $(basename $REP) -lt $OLDMINUTE ]
    then
      echoe -- Removing $REP.
      rm -rf $REP
      echoe -- Removal done.
    fi
  fi
done

echoe Checking for hourly backups to delete...

for REP in $DIR/Hourly/*
do
  if [ -d $REP ]
  then
    if [ $(basename $REP) -lt $OLDHOURLY ]
    then
      echoe -- Removing $REP.
      rm -rf $REP
      echoe -- Removal done.
    fi
  fi
done

echoe Checking for daily backups to delete...

for REP in $DIR/Daily/*
do
  if [ -d $REP ]
  then
    if [ $(basename $REP) -lt $OLDDAILY ]
    then
      echoe -- Removing $REP.
      rm -rf $REP
      echoe -- Removal done.
    fi
  fi
done

echoe Checking for monthly backups to delete...

for REP in $DIR/Monthly/*
do
  if [ -d $REP ]
  then
    if [ $(basename $REP) -lt $OLDMONTHLY ]
    then
      echoe -- Removing $REP.
      rm -rf $REP
      echoe -- Removal done.
    fi
  fi
done

echoe --- Script terminated ---