# NanoBlogger RSS 2.0 Feed Plugin

# concatenate modification variables
FEEDMOD_VAR="$New_EntryFile$Edit_EntryFile$Delete_EntryFile$Move_EntryFile$USR_TITLE"

# use entry excerpts from entry excerpts plugin
# (excerpts plugin must be enabled to work)
ENTRY_EXCERPTS=0

# limit number of items to include in feed
: ${FEED_ITEMS:=10}
: ${RSS2_ITEMS:=$FEED_ITEMS}
# build rss2 feeds for categories (0/1 = off/on)
: ${RSS2_CATFEEDS:=0}

# output filename of rss feed
NB_RSS2File="rss.$NB_SYND_FILETYPE"
# rss version
NB_RSS2Ver="2.0"

NB_RSS2ModDate=`date "+%Y-%m-%dT%H:%M:%S${BLOG_TZD}"`

# set link to archives
NB_RSS2ArchivesPath="$BLOG_URL/$ARCHIVES_DIR/"

# backwards support for deprecated BLOG_LANG
: ${BLOG_FEED_LANG:=$BLOG_LANG}

# watch and reset chronological order
if [ "$CHRON_ORDER" != 1 ]; then
	RESTORE_SORTARGS="$SORT_ARGS"
	SORT_ARGS="-ru"
else
	RESTORE_SORTARGS=
fi

if [ ! -z "$FEEDMOD_VAR" ] || [ "$NB_QUERY" = all ]; then
	set_baseurl "$BLOG_URL/"

	# escape special characters to help create valid xml feeds
	esc_chars(){
		sed -e '/[\&][ ]/ s//\& /g; /[\"]/ s//\"/g'
		}

	NB_RSS2Title=`echo "$BLOG_TITLE" |esc_chars`
	NB_RSS2Author=`echo "$BLOG_AUTHOR" |esc_chars`

	# make rss feed
	make_rssfeed(){
	MKPAGE_OUTFILE="$1"
	mkdir -p `dirname "$MKPAGE_OUTFILE"`
	BLOG_FEED_URL="$BLOG_URL"
	[ ! -z "$NB_RSS2CatLink" ] &&
		BLOG_FEED_URL="$BLOG_URL/$ARCHIVES_DIR/$NB_RSS2CatLink"

	cat > "$MKPAGE_OUTFILE" <<-EOF
		<?xml version="1.0" encoding="$BLOG_CHARSET"?>
        <?xml-stylesheet type="text/css" href="${BASE_URL}styles/feed.css"?>
		<rss version="2.0"
		 xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
		 xmlns:dc="http://purl.org/dc/elements/1.1/"
		 xmlns:admin="http://webns.net/mvcb/"
		>
		<channel>
			<title>$NB_RSS2Title</title>
			<link>$BLOG_FEED_URL</link>
			<description>$BLOG_DESCRIPTION</description>
			<dc:language>$BLOG_FEED_LANG</dc:language>
			<dc:creator>$NB_RSS2Author</dc:creator>
			<dc:date>$NB_RSS2ModDate</dc:date>
			<admin:generatorAgent rdf:resource="http://nanoblogger.sourceforge.net" />
			$NB_RSS2Entries
		</channel>
		</rss>
	EOF
	nb_msg "$MKPAGE_OUTFILE"
	# load makepage tidy plugin
	[ -f "$PLUGINS_DIR"/makepage/tidy.sh ] &&
		. "$PLUGINS_DIR"/makepage/tidy.sh
	}

	# generate feed entries
	build_rssfeed(){
	db_catquery="$1"
	query_db all "$db_catquery" limit "$RSS2_ITEMS"
	ARCHIVE_LIST=(${DB_RESULTS[@]})
	> "$SCRATCH_FILE".rss2feed
	for entry in ${ARCHIVE_LIST[@]}; do
		NB_RSS2EntryTime=`echo "$entry" |sed -e '/\_/ s//\:/g; s/[\.]'$NB_DATATYPE'//g'`
		load_entry "$NB_DATA_DIR/$entry" ALL
		set_entrylink "$entry"
		# non-portable find command! sets RFC822 date for pubDate
		#NB_RSS2EntryModDate=`find "$NB_DATA_DIR/$entry" -printf "%Ta, %Td %Tb %TY %TH:%TM:%TS %Tz\n"`
		NB_RSS2EntryTitle=`echo "$NB_EntryTitle" |esc_chars`
		NB_RSS2EntryAuthor=`echo "$NB_EntryAuthor" |esc_chars`
		NB_RSS2EntrySubject=; cat_title=; oldcat_title=
		rss2_catids=(`sed -e '/'$entry'[\>]/!d; /[\>\,]/ s// /g' \
				"$NB_DATA_DIR/master.$NB_DBTYPE" |cut -d" " -f 2-`)
		for rss2_catnum in ${rss2_catids[@]}; do
			cat_title=`sed 1q "$NB_DATA_DIR"/cat_"$rss2_catnum.$NB_DBTYPE"`
			[ "$cat_title" != "$oldcat_title" ] &&
				cat_title="$oldcat_title $cat_title"
			oldcat_title="$cat_title,"
		done
		if [ ! -z "$cat_title" ]; then
			cat_title=`echo $cat_title |sed -e '{$ s/\,[ ]$//g; }' |esc_chars`
			NB_RSS2EntrySubject=`echo '<dc:subject>'$cat_title'</dc:subject>'`
		fi
		if [ "$ENTRY_EXCERPTS" = 1 ]; then
			#NB_RSS2EntryExcerpt=`echo "$NB_EntryExcerpt" |esc_chars`
			NB_RSS2EntryExcerpt="$NB_EntryExcerpt"
		else
			#NB_RSS2EntryExcerpt=`echo "$NB_EntryBody" |esc_chars`
			NB_RSS2EntryExcerpt="$NB_EntryBody"
		fi
		# for escaped text/html only
		#<description><![CDATA[$NB_RSS2EntryExcerpt]]></description>
		cat >> "$SCRATCH_FILE".rss2feed <<-EOF
			<item>
				<link>${NB_RSS2ArchivesPath}$NB_EntryPermalink</link>
				<title>$NB_RSS2EntryTitle</title>
				<dc:date>$NB_RSS2EntryTime${BLOG_TZD}</dc:date>
				<dc:creator>$NB_RSS2EntryAuthor</dc:creator>
				$NB_RSS2EntrySubject
				<description><![CDATA[$NB_RSS2EntryExcerpt]]></description>
			</item>
		EOF
	done
	NB_RSS2Entries=$(< "$SCRATCH_FILE".rss2feed)
	}

	# generate category feed entries
	build_rss_catfeeds(){
	if [ "$CATEGORY_FEEDS" = 1 ] || [ "$RSS2_CATFEEDS" = 1 ]; then
		db_categories=(${CAT_LIST[@]})
		if [ ! -z "${db_categories[*]}" ]; then
			for cat_db in ${db_categories[@]}; do
				if [ -f "$NB_DATA_DIR/$cat_db" ]; then
					set_catlink "$cat_db"
					NB_RSS2CatFile=`echo "$category_file" |sed -e 's/[\.]'$NB_FILETYPE'/-rss.'$NB_SYND_FILETYPE'/g'`
					NB_RSS2CatLink="$category_link"
					NB_RSS2CatTitle=`sed 1q "$NB_DATA_DIR/$cat_db" |esc_chars`
					nb_msg "$plugins_action $category_dir rss $NB_RSS2Ver feed  ..."
					build_rssfeed "$cat_db"
					make_rssfeed "$BLOG_DIR/$ARCHIVES_DIR/$NB_RSS2CatFile"
				fi
			done
		fi
	fi
	}

	nb_msg "$plugins_action rss $NB_RSS2Ver feed ..."
	build_rssfeed nocat
	make_rssfeed "$BLOG_DIR/$NB_RSS2File"
	build_rss_catfeeds
fi

# restore chronological order
[ ! -z "$RESTORE_SORTARGS" ] &&
	SORT_ARGS="$RESTORE_SORTARGS"