#!/usr/bin/env zsh
# ZSH 4+ script to ensure that we are up-to-date last month
DATE=`date -u "+%Y%m"`
typeset -i DATE
CURDATE=$DATE
# date is of the form YYYYMM
# if the date ends in 01, we need to subtract 1 year and add 11 months
if [[ $(($DATE % 100)) == 1 ]]
then
    DATE=$DATE-89 # i.e. -100 (1 year) +11 (months)
else
    DATE=$DATE-1
fi
ARCHIVES_PATH=$HOME/archives/mbox-archives.conf

if [ $# -ge 1 ]; then
  ARCHIVES_PATH="$1"
fi

if [ ! -f $ARCHIVES_PATH ] ; then
  echo $ARCHIVES_PATH not found.  Exiting.
  exit 1
fi

source $ARCHIVES_PATH

for i in ${ARCHIVES} ; do
    dirname=${${(P)i}[1]}
    mboxtype=${${(P)i}[2]}
    mboxpath=${${(P)i}[3]}

    [ -t 0 ] && echo Updating $dirname from $mboxpath via $mboxtype for last month

    mboxfile=$MBOX_DIR/$dirname/$DATE.mbox
    mboxfile2=$MBOX_DIR/$dirname/$DATE

    case "$mboxtype" in
    rsync)
        # rsync should have already gotten this for us.
        if [ -f $mboxfile2.gz ] ; then
            zcat $mboxfile2.gz > $mboxfile
        fi
        ;;
    wget)
        wget -q $mboxpath.gz -O $mboxfile2.gz
        if [ -f $mboxfile2.gz ] ; then
            gzcat $mboxfile2.gz > $mboxfile
            rm $mboxfile2.gz
        fi 
        ;;
    local)
        mv $mboxpath $mboxfile
        if [ -f $mboxfile ]; then
            chmod 644 $mboxfile
            rm $mboxfile*.dir
            rm $mboxfile*.pag
            rm $MBOX_DIR/$dirname/$CURDATE.mbox*.dir
            rm $MBOX_DIR/$dirname/$CURDATE.mbox*.pag
        fi
        ;;
    *)
        echo "Say what? $mboxtype"
        exit 1
        ;;
    esac
    # We got the file successfully

    # We may have gotten it without .mbox suffix
    if [ -f $mboxfile2 -a ! -h $mboxfile ]; then
        # Have we already done the symlink? 
        echo "Creating link."
        # Get rid of the old one that isn't a symlink.
        if [ -f $mboxfile ]; then
            rm $mboxfile
        fi
        ln -sf $mboxfile2 $mboxfile
    fi
    if [ -f $mboxfile ]; then
        if [ ! -x $APACHE_DIR/bin/mod-mbox-util ]; then
          echo "Generating index."
          $APACHE_DIR/bin/generate_index $mboxfile
          $APACHE_DIR/bin/load_msgid $mboxfile > $mboxfile.msgid
        fi
    fi
done

if [ ! -x $APACHE_DIR/bin/mod-mbox-util ]; then
  $SCRIPT_DIR/create-index-all $ARCHIVES_INDEX
fi