#!/bin/bash

set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR

offlineimap -u quiet
shopt -s nullglob

omv() { # offlineimap mv
    src="$1"
    dst="$2"
    found_files=false
    for x in new cur; do
        files=("$src_base"/"$src"/$x/*)
        if [[ $files ]]; then
            found_files=true
            mv "${files[@]}" /m/md/"$dst"/$x
        fi
    done
}

src_base=/m/offlineimap
omv "Sent Items" "Sent"
omv INBOX offlineimaptmp
src_base=/m/md
if $found_files; then
    sieve-filter -eW ~/sieve/main.sieve offlineimaptmp &>/dev/null
    # the default folder is INBOX for anything leftover
    omv offlineimaptmp INBOX
    # remove messages from remote host
    offlineimap -u quiet
    mu index &>/dev/null ||:
fi