--- a/streamlet-examples/__relpipe_in_filesystem_script_pdfinfo Sat Jan 18 16:41:59 2020 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,73 +0,0 @@
-#!/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 provides PDF metadata of given files. It calls the tool pdfinfo.
-# With no options it returns just number of pages (or 0 if the file is not a PDF).
-# Specific attributes can be selected using options – e.g. --option 'attribute' 'Author'
-# List of available attributes can be obtained by directly calling the pdfinfo command on a PDF file.
-
-
-. "$(dirname $0)/streamlet-common.sh"
-
-processMessage_WAITING_FOR_OUTPUT_ATTRIBUTES_METADATA() {
- pdfFields=()
-
- for (( i=0; i<${#optionNames[@]}; i++)); do
- if [[ "x${optionNames[$i]}" == "xattribute" ]]; then
- pdfFields+=("${optionValues[$i]}");
- elif [[ "x${optionNames[$i]}" == "xprefix" ]]; then
- pdfPrefix="${optionValues[$i]}";
- else
- echo "Unsupported option: ${optionNames[$i]}" >&2
- fi
- done
-
- if [[ -z "$pdfFields" ]]; then
- pdfFields=( "Pages" );
- fi
-
- for (( i=0; i<${#pdfFields[@]}; i++)); do
- if [[ "x${pdfFields[$i]}" == "xPages" ]]; then local type="integer"; else local type="string"; fi
- send OUTPUT_ATTRIBUTE_METADATA "${outputAttributeAliases[$i]-$pdfPrefix${pdfFields[$i]}}" "$type"
- done
-
- send WAITING_FOR_INPUT_ATTRIBUTES
-}
-
-processMessage_WAITING_FOR_OUTPUT_ATTRIBUTES() {
- local pdfInfo pdfValid value isNull;
-
- [[ -d "$currentFile" ]] || pdfInfo="$(pdfinfo -isodates "$currentFile")";
- pdfValid="$?";
-
- for (( i=0; i<${#pdfFields[@]}; i++)); do
- value="$(echo "$pdfInfo" | grep -P "^\Q${pdfFields[$i]}\E:" | sed -E 's/[^:]+:\s+(.*)/\1/g' | tr -d '\n';)"; # the field name must not contain "\E"
-
- if ([[ ! "x$pdfValid" == "x0" ]] || [[ "x$value" == "x" ]]) && [[ "x${pdfFields[$i]}" == "xPages" ]]; then value="0"; isNull="true";
- elif [[ ! "x$pdfValid" == "x0" ]]; then value=""; isNull="true";
- else isNull="false";
- fi
-
- send OUTPUT_ATTRIBUTE "$value" "$isNull";
- done
-
- send WAITING_FOR_INPUT_ATTRIBUTES;
-}
-
-initialize
-processMessages