#!/bin/bash

# Relational pipes

# Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)

#

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, version 3 of the License.

#

# 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 General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program. If not, see <http://www.gnu.org/licenses/>.

# This streamlet counts lines of code of given files. It calls the tool cloc.

#

# With no options, these attributes are provided: language, code, comment, blank

# Specific attributes can be selected using options – e.g. --option 'attribute' 'code'

# or --option "attribute" "total" (sum of code, comment and blank lines, hidden by default).

#

# Optional prefix can be added to attribute names: --option 'prefix' 'my_prefix_'

. "$(dirname "$(realpath "$0")")/streamlet-common.sh"

processMessage_WAITING_FOR_OUTPUT_ATTRIBUTES_METADATA() {

	clocFields=()

	for (( i=0; i<${#optionNames[@]}; i++)); do

		if [[ "x${optionNames[$i]}" == "xattribute" ]]; then

			if [[ "${optionValues[$i]}" =~ ^(language|blank|comment|code)$ ]]; then

				clocFields+=("${optionValues[$i]}");

			else

				echo "Unsupported attribute: ${optionValues[$i]}" >&2

			fi

		elif [[ "x${optionNames[$i]}" == "xprefix" ]]; then

			clocPrefix="${optionValues[$i]}";

		else

			echo "Unsupported option: ${optionNames[$i]}" >&2

		fi

	done

	if [[ -z "$clocFields" ]]; then

		clocFields=( "language" "code" "comment" "blank" ); # + "total"

	fi

	for (( i=0; i<${#clocFields[@]}; i++)); do

		if [[ "x${clocFields[$i]}" == "xlanguage" ]]; then local type="string"; else local type="integer"; fi

		send OUTPUT_ATTRIBUTE_METADATA "${outputAttributeAliases[$i]-$clocPrefix${clocFields[$i]}}"    "$type"

	done

	send WAITING_FOR_INPUT_ATTRIBUTES

}

processMessage_WAITING_FOR_OUTPUT_ATTRIBUTES() {

	local language files blank comment code total;

	[[ -d "$currentFile" ]] || read_nullbyte language files blank comment code total < <( cloc "$currentFile" | perl -ne 'if (/(.*?)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/) { print "$1\0$2\0$3\0$4\0$5\0"; print $3 + $4 + $5; print "\0"; }' );

	for (( i=0; i<${#clocFields[@]}; i++)); do

		value="${!clocFields[$i]}";

		if [[ "x$files" == "x1" ]]; then isNull="false";

		else                             isNull="true"; fi

		send OUTPUT_ATTRIBUTE "$value"    "$isNull";

	done

	send WAITING_FOR_INPUT_ATTRIBUTES;

}

initialize

processMessages