#!/bin/bash
# Monthly logging script
# Call mlog and it will update a log file

# Set the default mlog folder
[[ -z $MLOG_FOLDER ]] && MLOG_FOLDER="$HOME/mlog"

# Make sure that the folder exists
[[ ! -d $MLOG_FOLDER ]] && mkdir -pv $MLOG_FOLDER

# Make sure that we have a valid TMPDIR
[[ -z $TMPDIR ]] && TMPDIR='/tmp'

# Make sure that we have a valid EDITOR
[[ -z $EDITOR ]] && EDITOR=vim

MLOG_HDR=''
MLOG_TS="[$(date)]"
MLOG_LOG="$MLOG_FOLDER/$(date +%Y-%m)"
MLOG_FILE="$TMPDIR/mlog-tmp-$$"

if [[ -x $HOME/bin/stardate ]]
then
    [[ -z $MLOG_RANK ]] && MLOG_RANK='Chief Engineer'

    MLOG_HDR=`echo "$MLOG_RANK's log, Stardate $($HOME/bin/stardate)" | sed 's/.$//'`

    if [[ -e $MLOG_LOG ]]
    then
        MLOG_LAST=$(grep Stardate $MLOG_LOG | tail -1)

        if [[ "$MLOG_LAST" == "$MLOG_HDR" ]]
        then
            MLOG_HDR="$MLOG_RANK's log, supplemental"
        fi
    fi
fi

$EDITOR $MLOG_FILE

[[ ! -s $MLOG_FILE ]] && rm -f $MLOG_FILE && exit 0


echo "$MLOG_HDR" >> $MLOG_LOG
echo "$MLOG_TS"  >> $MLOG_LOG
echo             >> $MLOG_LOG   # Empty line
cat $MLOG_FILE >> $MLOG_LOG
echo -e "\n----------------------------------------\n" >> $MLOG_LOG