# HG changeset patch
# User František Kučera <franta-hg@frantovo.cz>
# Date 1659178694 -7200
# Node ID 3e17086fffea87c274a13ac8df4a42d132bbaea5
# Parent  e6f005f3edfe185fa89bd2e6a52cf14886937b59
process only relations named 'message' or matching the --relation pattern

diff -r e6f005f3edfe -r 3e17086fffea src/Configuration.h
--- a/src/Configuration.h	Sat Jul 30 11:33:56 2022 +0200
+++ b/src/Configuration.h	Sat Jul 30 12:58:14 2022 +0200
@@ -44,7 +44,7 @@
 	};
 
 
-	relpipe::common::type::StringX relation = L"socket";
+	relpipe::common::type::StringX relation = L"message";
 	std::vector<SocketOption> options;
 
 	virtual ~Configuration() {
diff -r e6f005f3edfe -r 3e17086fffea src/SocketHandler.h
--- a/src/SocketHandler.h	Sat Jul 30 11:33:56 2022 +0200
+++ b/src/SocketHandler.h	Sat Jul 30 12:58:14 2022 +0200
@@ -23,6 +23,7 @@
 #include <sstream>
 #include <locale>
 #include <codecvt>
+#include <regex>
 
 #include <relpipe/common/type/typedefs.h>
 #include <relpipe/reader/TypeId.h>
@@ -42,10 +43,12 @@
 	std::wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.
 	Configuration configuration;
 	std::shared_ptr<Socket> socket;
+	std::wregex relationPattern;
 
 	struct CurrentRelation {
 		relpipe::common::type::StringX name;
 		std::vector<relpipe::reader::handlers::AttributeMetadata> attributes;
+		bool valid;
 		relpipe::common::type::Integer attributeIndex = 0;
 		std::string currentValue;
 	} currentRelation;
@@ -62,28 +65,28 @@
 
 public:
 
-	SocketHandler(Configuration configuration) : configuration(configuration) {
+	SocketHandler(Configuration configuration) : configuration(configuration), relationPattern(std::wregex(configuration.relation)) {
 	}
 
 	void startRelation(relpipe::common::type::StringX name, std::vector<relpipe::reader::handlers::AttributeMetadata> attributes) override {
-		configureSocket();
-		currentRelation = CurrentRelation{name, attributes};
+		currentRelation = CurrentRelation{name, attributes, std::regex_match(name, relationPattern)};
+		if (currentRelation.valid) configureSocket();
 	}
 
 	void attribute(const relpipe::common::type::StringX& value) override {
-
-		auto attributeName = currentRelation.attributes[currentRelation.attributeIndex].getAttributeName();
-		if (attributeName == L"text" && value.size()) currentRelation.currentValue = convertor.to_bytes(value);
-		else if (attributeName == L"data" && value.size()) currentRelation.currentValue = Hex::fromHex(value).str();
-		else if (attributeName == L"text"); // keep empty or value from 'data'
-		else if (attributeName == L"data"); // keep empty or value from 'text'
+		if (currentRelation.valid) {
+			auto attributeName = currentRelation.attributes[currentRelation.attributeIndex].getAttributeName();
+			if (attributeName == L"text" && value.size()) currentRelation.currentValue = convertor.to_bytes(value);
+			else if (attributeName == L"data" && value.size()) currentRelation.currentValue = Hex::fromHex(value).str();
+			else if (attributeName == L"text"); // keep empty or value from 'data'
+			else if (attributeName == L"data"); // keep empty or value from 'text'
 
-		currentRelation.attributeIndex++;
-		if (currentRelation.attributeIndex == currentRelation.attributes.size()) {
-			currentRelation.attributeIndex = 0;
-			socket->send(currentRelation.currentValue);
+			currentRelation.attributeIndex++;
+			if (currentRelation.attributeIndex == currentRelation.attributes.size()) {
+				currentRelation.attributeIndex = 0;
+				socket->send(currentRelation.currentValue);
+			}
 		}
-
 	}
 
 	void endOfPipe() {