#!/bin/bash
# apple2moz.sh
# migrate files from apple mail to thunderbird
#
# No warranties. Released under the GPL.
# released: 2003.12.11
# version: 1.0
# author:  Chris Kelly ckdake@yahoo.com
#
# Apple Mail Structure:
# |---folder
# |    |---folder1.mbox (folder)
# |    |    |----mbox (the actual unix mbox file)
# |    |---folder2.mbox (folder)
# |    |    |----mbox (the actual unix mbox file)
# |---folderx
# |    |---nestedfolder
# |    |    |---folder1.mbox
# |    |    |    |----mbox (the actual unix mbox file) 
#
# A folder can have any number of .mbox folders in it, 
# but each .mbox folder only has one mbox file in it, 
# And folders can be nested as deeply as they want to be
#
# Thunderbird Structure
# |---folder (the mbox file for folder.sbd, empty if only subfolders)
# |---folder.sbd (the folder)
# |    |---folder1 (the actual unix mbox file)
# |    |---folder2 (the actual unix mbox file)
# |---folderx (the mbox file for folderx.sbd, empty if only subfolders)
# |---folderx.sbd
# |    |---nestedfolder (the mbox file for the nexted folder)
# |    |---nestedfolder.sbd
# |    |    |---folder1 (the actual unix mbox file) 

E_NOARGS=65

#set verbose to "yes" for verbose output when running
VERBOSE="no"

NOMBOXERRORS="no"

function process_directory() {
    # $1 the apple mail directory we are accessing
    # $2 the folder for moz

    # for mbox folders
    for directory in `ls -1 $1 | sed -n /.mbox/p | sed s/.mbox//g`
    do
        if [ -x "$directory" ]
            then
                echo "... mbox folder $directory is empty!"
            else
            if [ "$VERBOSE" == "yes" ]; then
                echo "... processing mbox folder: $directory"
            fi
                if [ -e "$1/$directory.mbox/mbox" ]; then
                    cp "$1/$directory.mbox/mbox" "$2/$directory"
                else 
                    echo "... no mbox folder for $directory. This is OK"
                    NOMBOXERRORS="yes"
                    touch "$2/$directory"
                fi
        fi
    done
  
    # for non mbox folders (storage folders)
    for directory in `ls -F1 $1 | grep \/ | sed s/[/]//g | sed /.mbox/d`
    do
        if [ -z "$directory" ] 
            then
                echo "... directory $directory is empty!"
            else
            if [ "$VERBOSE" == "yes" ]; then
                echo "... processing storage folder: $directory"
            fi
            mkdir "$2/$directory.sbd"
            touch "$2/$directory"
            process_directory "$1/$directory" "$2/$directory.sbd"
        fi
    done
}

function remove_spaces() {
    #$1 is the directory to remove the spaces in;

    find "$1" -name '* *' -depth | while read i
    do 
        f=${i##*/} d=${i%$f} fx=${f// /_}
        mv "$d$f" "$d$fx"
            if [ "$VERBOSE" == "yes" ]; then
                echo "...renamed \"$d$f\" to \"$d$fx\""
            fi
    done    
}


if [ -z "$1" ] || [ -z "$2" ] # exit if no args given
then
    echo "Usage: '$0 path-to-apple-mail path-to-thunderbird-mail'"
    echo "Example: $0 /Users/ckdake/Library/Mail"
    echo "    /Users/ckdake/Library/Thunderbird/Profiles/default/8asd9f87.slt/Mail/Local\ Folders"
    exit $E_NOARGS
fi
echo "---------------------------------------"
echo "initializing migrate.sh..."
echo "creating temp folder..."
mkdir -p "/tmp/migratesh$1"
cp -R "$1/" "/tmp/migratesh$1"
echo "removing spaces in file names..."
remove_spaces /tmp/migratesh$1/
echo "-----------------------------"
echo "converting..."
mkdir -p "$2/imported.sbd"
touch "$2/imported"
process_directory "/tmp/migratesh$1" "$2/imported.sbd/"
echo "-----------------------------"
echo "cleaning up..."
rm -rf "/tmp/migratesh$1"
if [ "$NOMBOXERRORS" == "yes" ]; then
    echo "-----------------------------"
    echo "a no mbox error mean that you have a folder in your email database" 
    echo "with no emails in it. This is perfectly normal and perfectly "
    echo "healthy and there is no need to worry about it at all"
fi
echo "---------------------------------------"
echo "done!"

exit 0