# vim: syntax=sh
# Copyright 2010 Luka Vandervelden
# Distributed under the terms of the New BSD Licence

DESCRIPTION="Read Nutritive news items"
MAINTAINER="lukc@linkmauve.fr"
VERSION="0.1"

# % eselect news
#Usage: eselect news <action> <options>
#
#Standard actions:
#  help                      Display help text
#  usage                     Display usage information
#  version                   Display version information
#
#Extra actions:
#  purge                     Purge read news
#  unread <item>...          Mark read news items as unread again
#    all                       Mark all news items as unread
#    item                      Number of item (from 'list' action)
# %

### Global variables

NEWS_DIR="/srv/news"
READ_FILE=~/.news_read

### Global functions

remove_underscores() {
	for word in $@; do
		echo "`echo "$word" | sed -e "s|_| |g"`"
	done
}

get_author() {
	head -n 1 $1
}

get_date() {
	head -n 2 $1 |\
	grep -v "$(get_author $1)"
}

get_content() {
	local item_lenght=0
	item_lenght=`wc -l $ITEM | cut -d ' ' -f 1`
	tail -n $(($item_lenght-3)) $1
}

read_item() {
	local ITEM="$1"
	echo -e "\033[01;34mAuthor: \t$(get_author $ITEM)"
	echo -e "\033[01;34mDate:   \t$(get_date $ITEM)"
	echo -e "\033[01;34m\t---- $(remove_underscores "$ITEM" | sed -e "s|\.new||;s|`dirname $ITEM`/||") ----\033[00m "
	echo -e "\033[00m"
	local content="$(get_content $ITEM)"
	local sed_script="	s|=====$|   \\\\033[00m  |
				s|=====|  \\\\033[01;32m   |
				s|  \* |  \\\033[00;01m- |
				s|$|\\\\033[00m|"
	content="`echo "$content" | sed -e "$sed_script"`"
	echo -e "$content"
	if ! is_read $ITEM; then
		mark_read $ITEM
	fi
}

is_read() {
	if grep -q "##$1##" $READ_FILE 2>/dev/null; then
		return 0
	else
		return 1
	fi
}

mark_read() {
	echo "##$1##" >> $READ_FILE
}

#  count                     Display number of news items
#    new                       Count unread news items (default)
#    all                       Count all news items

describe_count() {
	echo "Display number of news items"
}

describe_count_options() {
	echo "new : Count unread news items (default)"
	echo "all : Count all news items"
}

do_count() {
	local params=
	local i=0
	case $1 in
		""|new|all);;
		*)
			die -q "$1: unknown option for count.";;
	esac
	for file in `ls ${NEWS_DIR}`; do
		case $file in
			*.new)
				case $1 in
					""|new)
						if is_read $NEWS_DIR/$file; then
							i=$(($i+1))
						fi
					;;
					"all")
						i=$(($i+1))
					;;
				esac
			;;
		esac
	done
	echo "${i}"
}

#  list                      List news items

describe_list() {
	echo "List news items"
}

do_list() {
	local params=
	local i=0
	local news_list=()
	for file in `ls ${NEWS_DIR}`; do
		case $file in
			*.new)
				new_name="`echo $file | sed -e "s|\.new||"`"
				news_list=(${news_list[@]} $new_name)
				;;
		esac
	done
	write_list_start "News items:"
	if [[ -n "${news_list[@]}" ]]; then
		for item in ${news_list[@]}; do
			i=$(($i+1))
			if is_read "$NEWS_DIR/${news_list[$(($i-1))]}.new"; then
				write_numbered_list_entry $i "\033[01;34m(read)   \t`remove_underscores ${news_list[$(($i-1))]}`"
			else
				write_numbered_list_entry $i "\033[01;34m(unread) \t`remove_underscores ${news_list[$(($i-1))]}`"
			fi
		done
	else
		write_kv_list_entry "(none found)"
	fi
}

### read
#  read <item>...            Read news items
#    --mbox                    Output in mbox format
#    --raw                     Output in raw format
#    new                       Read unread news items (default)
#    all                       Read all news items
#    item                      Number of item (from 'list' action)

describe_read() {
	echo "Read news items"
}

describe_read_parameters() {
	echo "<item>..."
}

describe_read_options() {
	echo "new : Read unread news items (default)"
	echo "all : Read all news items"
	echo "item : Number of item (from 'list' action)"
}

do_read() {
	local params=
	local i=0
	for file in `ls ${NEWS_DIR}`; do
		case $file in
			*.new)
				i=$(($i+1))
				if [[ "$i" = "$1" ]] || [[ "$1" = "all" ]] || ([[ "$1" = "new" ]] && ! is_read ${NEWS_DIR}/$file); then
					read_item ${NEWS_DIR}/$file
				case $1 in
					all|new)
					echo -e "  \033[01;34m--------------------\033[00m";;
					*)
					exit 0;;
				esac
				fi
				;;
		esac
	done
	if [[ "$1" != "all" ]] && [[ "$1" != "new" ]]; then
		die -q "There is no entry with this number."
	fi
}