# Relational pipes

# Copyright © 2019 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/>.

_relpipe_in_filesystem_completion() {

	local w0 w1 w2

	COMPREPLY=()

	w0=${COMP_WORDS[COMP_CWORD]}

	w1=${COMP_WORDS[COMP_CWORD-1]}

	w2=${COMP_WORDS[COMP_CWORD-2]}

	FILE_FIELDS=(

		"path"

		"name"

		"size"

		"path_absolute"

		"path_canonical"

		"type"

		"symlink_target_type"

		"symlink_target"

		"owner"

		"group"

		"content"

	)

	XATTR_FIELDS=(

		"mime_type"

		"charset"

		"creator"

		"xdg.comment"

		"xdg.origin.url"

		"xdg.origin.email.subject"

		"xdg.language"

		"xdg.publisher"

		"dublincore.title"

		"dublincore.creator"

		"dublincore.rights"

	)

	if   [[ "$w1" == "--relation"      && "x$w0" == "x" ]];    then COMPREPLY=("''")

	elif [[ "$w1" == "--as"            && "x$w0" == "x" ]];    then COMPREPLY=("''")

	elif [[ "$w1" == "--option"        && "x$w0" == "x" ]];    then COMPREPLY=("''")

	elif [[ "$w2" == "--option"        && "x$w0" == "x" ]];    then COMPREPLY=("''")

	elif [[ "$w1" == "--parallel"      && "x$w0" == "x" ]];    then COMPREPLY=($(nproc --all))

	elif [[ "$w1" == "--file"                           ]];    then COMPREPLY=($(compgen -W "${FILE_FIELDS[*]}"  -- "$w0"))

	elif [[ "$w1" == "--xattr"                          ]];    then COMPREPLY=($(compgen -W "${XATTR_FIELDS[*]}" -- "$w0"))

	elif [[ "$w1" == "--streamlet"                      ]];    then COMPREPLY=($(while read c; do PATH="$RELPIPE_IN_FILESYSTEM_STREAMLET_PATH" type -P "$c" &>/dev/null && echo "$c"; done < <(PATH="$RELPIPE_IN_FILESYSTEM_STREAMLET_PATH" compgen -A command -- "$w0")))

	else

		OPTIONS=(

			"--relation"

			"--file"

			"--xattr"

			"--streamlet"

			"--as"

			"--option"

			"--parallel"

		)

		COMPREPLY=($(compgen -W "${OPTIONS[*]}" -- "$w0"))

	fi

}

complete -F _relpipe_in_filesystem_completion relpipe-in-filesystem