#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Emacs application
#
# License
# =======
#
# Copyright (C) 2014-2016 Bob Mottram <bob@robotics.uk.to>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

function upgrade_emacs {
    echo ''
}

function backup_local_emacs {
	echo ''
}

function backup_remote_emacs {
	echo ''
}

function remove_emacs {
	if ! grep -Fxq "install_emacs" $COMPLETION_FILE; then
		return
	fi
	apt-get -y remove --purge emacs24
	update-alternatives --set editor /usr/bin/nano
	sed -i '/install_emacs/d' $COMPLETION_FILE
}

function install_emacs {
	if grep -Fxq "install_emacs" $COMPLETION_FILE; then
		return
	fi
	update-alternatives --set editor /usr/bin/emacs24

	# A minimal emacs configuration
	#echo -n "(add-to-list 'load-path " > /home/$MY_USERNAME/.emacs
	#echo '"~/.emacs.d/")' >> /home/$MY_USERNAME/.emacs
	#echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Remove trailing whitepace ======================================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo ";;(add-hook 'before-save-hook 'delete-trailing-whitespace)" >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo ';; Goto a line number with CTRL-l' >> /home/$MY_USERNAME/.emacs
	echo -n '(global-set-key "\C-l" ' >> /home/$MY_USERNAME/.emacs
	echo "'goto-line)" >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Show line numbers ==============================================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo "(add-hook 'find-file-hook (lambda () (linum-mode 1)))" >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Enable line wrapping in org-mode ===============================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo " (add-hook 'org-mode-hook" >> /home/$MY_USERNAME/.emacs
	echo "           '(lambda ()" >> /home/$MY_USERNAME/.emacs
	echo "              (visual-line-mode 1)))" >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Enable shift select in org mode ================================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo '(setq org-support-shift-select t)' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Set standard indent to 4 rather that 4 =========================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo '(setq standard-indent 4)' >> /home/$MY_USERNAME/.emacs
	echo '(setq-default tab-width 4)' >> /home/$MY_USERNAME/.emacs
	echo '(setq c-basic-offset 4)' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Support Wheel Mouse Scrolling ==================================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo '(mouse-wheel-mode t)' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Place Backup Files in Specific Directory =======================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo '(setq make-backup-files t)' >> /home/$MY_USERNAME/.emacs
	echo '(setq version-control t)' >> /home/$MY_USERNAME/.emacs
	echo '(setq backup-directory-alist (quote ((".*" . "~/.emacs_backups/"))))' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Make Text mode the default mode for new buffers ================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo "(setq default-major-mode 'text-mode)" >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Line length ====================================================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo '(setq-default fill-column 72)' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Enable Line and Column Numbering ===============================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo '(line-number-mode 1)' >> /home/$MY_USERNAME/.emacs
	echo '(column-number-mode 1)' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Turn on Auto Fill mode automatically in all modes ==============' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo ';; Auto-fill-mode the the automatic wrapping of lines and insertion of' >> /home/$MY_USERNAME/.emacs
	echo ';; newlines when the cursor goes over the column limit.' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo ';; This should actually turn on auto-fill-mode by default in all major' >> /home/$MY_USERNAME/.emacs
	echo ';; modes. The other way to do this is to turn on the fill for specific modes' >> /home/$MY_USERNAME/.emacs
	echo ';; via hooks.' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo '(setq auto-fill-mode 1)' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo $';; ===== Enable GPG encryption =========================================' >> /home/$MY_USERNAME/.emacs
	echo '' >> /home/$MY_USERNAME/.emacs
	echo "(require 'epa)" >> /home/$MY_USERNAME/.emacs
	echo '(epa-file-enable)' >> /home/$MY_USERNAME/.emacs
	cp /home/$MY_USERNAME/.emacs /root/.emacs
	chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.emacs

	echo 'install_emacs' >> $COMPLETION_FILE
}

# NOTE: deliberately no exit 0