#!/bin/bash
# Feeds the upload queue with megawarcs.
#
#   ./pack-one PROCESSED_DIR TARGET_DIR UPLOAD_QUEUE_DIR
#
# 1. Grabs an item from PROCESSED_DIR
# 2. Reserves the item by moving the directory to the working directory
# 3. Makes a megawarc in the TARGET_DIR
# 4. Removes the source files from the working directory
# 5. Moves the megawarc to UPLOAD_QUEUE_DIR
#
# The program exits with 1 on any nontransient error.
#
# run from the packer directory /archiveteam/packer-1/
# 
#   ./pack-one /archiveteam/processed/archive /archiveteam/ssd1/packer-1 /archiveteam/ssd1/upload-queue
#

PROCESSED_DIR=$1
TARGET_DIR=$2
UPLOAD_QUEUE_DIR=$3

SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
MEGAWARC=$SCRIPT_DIR/megawarc/megawarc

if [ ! -f ./config.sh ] ; then
  echo "config.sh not found in current directory."
  exit 1
fi
source ./config.sh


function mayicontinue {
  echo
# echo "May I continue?"
# read
# echo
}

mkdir -p $TARGET_DIR
mkdir -p $UPLOAD_QUEUE_DIR


# check if the upload queue is empty
# if [ "$( ls -A $UPLOAD_QUEUE_DIR )" ]
# then
#   echo "Upload queue not empty. Wait."
#   sleep 30
#   exit 0
# fi


mayicontinue


# try to grab a directory from /archiveteam/processed/archive/
ITEM=none
while [[ $ITEM = none ]]
do
  possible_item=$( ls -1 $PROCESSED_DIR/ | grep 201 | sort | head -n 1 )
  if [[ $possible_item =~ 201 ]]
  then
    echo "Trying to grab $possible_item"
    if mv $PROCESSED_DIR/$possible_item .
    then
      ITEM=$possible_item
    else
      echo "Failed to move $possible_item"
      sleep 5
    fi
  else
    date
    echo "No current item found!"
    sleep 30
    exit 0
  fi
done


mayicontinue


echo "$( date ): Starting megawarc for item $ITEM" >> packer.log

# construct a megawarc
mkdir -p $TARGET_DIR/$ITEM
$MEGAWARC --verbose pack $TARGET_DIR/$ITEM/${FILE_PREFIX}${ITEM} $ITEM
result=$?

if [[ $result -ne 0 ]]
then
  date
  echo "megawarc exited with $result for $ITEM"
  exit 1
fi

echo "$( date ): Completed megawarc for item $ITEM" >> packer.log


mayicontinue


# remove files
echo "megawarc OK, removing source files"
rm -rf $ITEM
result=$?

if [[ $result -ne 0 ]]
then
  date
  echo "rm -rf source files exited with $result for $ITEM"
  exit 1
fi


echo "add to upload queue"
mv $TARGET_DIR/$ITEM $UPLOAD_QUEUE_DIR


exit 0