From d9f123c84c4ce91e1b1eb09509223fb61b29978a Mon Sep 17 00:00:00 2001
From: rr- <rr-@sakuya.pl>
Date: Wed, 24 Feb 2016 21:24:44 +0100
Subject: [PATCH] Add ListingTagsHandler

---
 src/tags_handlers/listing_tags_handler.cc     | 16 ++++++++++++++
 src/tags_handlers/listing_tags_handler.h      | 20 +++++++++++++++++
 .../listing_tags_handler_test.cc              | 22 +++++++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 src/tags_handlers/listing_tags_handler.cc
 create mode 100644 src/tags_handlers/listing_tags_handler.h
 create mode 100644 tests/tags_handlers/listing_tags_handler_test.cc

diff --git a/src/tags_handlers/listing_tags_handler.cc b/src/tags_handlers/listing_tags_handler.cc
new file mode 100644
index 0000000..1013667
--- /dev/null
+++ b/src/tags_handlers/listing_tags_handler.cc
@@ -0,0 +1,16 @@
+#include "tags_handlers/listing_tags_handler.h"
+
+using namespace opustags;
+
+ListingTagsHandler::ListingTagsHandler(
+    const int streamno,
+    std::ostream &output_stream)
+    : StreamTagsHandler(streamno), output_stream(output_stream)
+{
+}
+
+void ListingTagsHandler::list_impl(const Tags &tags)
+{
+    for (const auto &kv : tags.get_all())
+        output_stream << std::get<0>(kv) << "=" << std::get<1>(kv) << "\n";
+}
diff --git a/src/tags_handlers/listing_tags_handler.h b/src/tags_handlers/listing_tags_handler.h
new file mode 100644
index 0000000..9b6f613
--- /dev/null
+++ b/src/tags_handlers/listing_tags_handler.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <iostream>
+#include "tags_handlers/stream_tags_handler.h"
+
+namespace opustags {
+
+    class ListingTagsHandler : public StreamTagsHandler
+    {
+    public:
+        ListingTagsHandler(const int streamno, std::ostream &output_stream);
+
+    protected:
+        void list_impl(const Tags &) override;
+
+    private:
+        std::ostream &output_stream;
+    };
+
+}
diff --git a/tests/tags_handlers/listing_tags_handler_test.cc b/tests/tags_handlers/listing_tags_handler_test.cc
new file mode 100644
index 0000000..65998a6
--- /dev/null
+++ b/tests/tags_handlers/listing_tags_handler_test.cc
@@ -0,0 +1,22 @@
+#include "tags_handlers/listing_tags_handler.h"
+#include "catch.h"
+#include <sstream>
+
+using namespace opustags;
+
+TEST_CASE("Listing tags handler test")
+{
+    const auto streamno = 1;
+
+    Tags tags;
+    tags.set("z", "value1");
+    tags.set("a", "value2");
+    tags.set("y", "value3");
+    tags.set("c", "value4");
+
+    std::stringstream ss;
+    ListingTagsHandler handler(streamno, ss);
+    handler.list(streamno, tags);
+
+    REQUIRE(ss.str() == "z=value1\na=value2\ny=value3\nc=value4\n");
+}