db/upnp/Object: add attribute "tag"

Replaces "m_title" and "m_props".  More bloat removed.

src/db/UpnpDatabasePlugin.cxx

@@ -210,21 +210,7 @@ upnpItemToSong(const UPnPDirObject &dirent, const char *uri)
 		uri = dirent.url.c_str();
 
 	Song *s = Song::NewFile(uri, nullptr);
-
+	s->tag = new Tag(dirent.tag);
-	TagBuilder tag;
-
-	if (dirent.duration > 0)
-		tag.SetTime(dirent.duration);
-
-	tag.AddItem(TAG_TITLE, dirent.m_title.c_str());
-
-	for (auto i = upnp_tags; i->name != nullptr; ++i) {
-		const char *value = dirent.getprop(i->name);
-		if (value != nullptr)
-			tag.AddItem(i->type, value);
-	}
-
-	s->tag = tag.CommitNew();
 	return s;
 }
 
@@ -267,27 +253,6 @@ UpnpDatabase::GetSong(const char *uri, Error &error) const
 	return song;
 }
 
-/**
- * Retrieve the value for an MPD tag from an object entry.
- */
-gcc_pure
-static const char *
-getTagValue(const UPnPDirObject &dirent, TagType tag)
-{
-	if (tag == TAG_TITLE) {
-		if (!dirent.m_title.empty())
-			return dirent.m_title.c_str();
-
-		return nullptr;
-	}
-
-	const char *name = tag_table_lookup(upnp_tags, tag);
-	if (name == nullptr)
-		return nullptr;
-
-	return dirent.getprop(name);
-}
-
 /**
  * Double-quote a string, adding internal backslash escaping.
  */
@@ -801,7 +766,7 @@ UpnpDatabase::VisitUniqueTags(const DatabaseSelection &selection,
 			    dirent.item_class != UPnPDirObject::ItemClass::MUSIC)
 				continue;
 
-			const char *value = getTagValue(dirent, tag);
+			const char *value = dirent.tag.GetValue(tag);
 			if (value != nullptr) {
 #if defined(__clang__) || GCC_CHECK_VERSION(4,8)
 				values.emplace(value);

src/db/upnp/Directory.cxx

@@ -21,6 +21,9 @@
 #include "Directory.hxx"
 #include "Util.hxx"
 #include "Expat.hxx"
+#include "Tags.hxx"
+#include "tag/TagBuilder.hxx"
+#include "tag/TagTable.hxx"
 
 #include <algorithm>
 #include <string>
@@ -28,14 +31,6 @@
 
 #include <string.h>
 
-static const char *const upnptags[] = {
-	"upnp:artist",
-	"upnp:album",
-	"upnp:genre",
-	"upnp:originalTrackNumber",
-	nullptr,
-};
-
 gcc_pure
 static UPnPDirObject::ItemClass
 ParseItemClass(const char *name)
@@ -77,6 +72,7 @@ titleToPathElt(std::string &&s)
 class UPnPDirParser final : public CommonExpatParser {
 	std::vector<std::string> m_path;
 	UPnPDirObject m_tobj;
+	TagBuilder tag;
 
 public:
 	UPnPDirParser(UPnPDirContent& dir)
@@ -130,7 +126,7 @@ protected:
 				const char *duration =
 					GetAttribute(attrs, "duration");
 				if (duration != nullptr)
-					m_tobj.duration = ParseDuration(duration);
+					tag.SetTime(ParseDuration(duration));
 			}
 
 			break;
@@ -150,8 +146,10 @@ protected:
 	virtual void EndElement(const XML_Char *name)
 	{
 		if ((!strcmp(name, "container") || !strcmp(name, "item")) &&
-		    checkobjok())
+		    checkobjok()) {
+			tag.Commit(m_tobj.tag);
 			m_dir.objects.push_back(std::move(m_tobj));
+		}
 
 		m_path.pop_back();
 	}
@@ -160,14 +158,19 @@ protected:
 	{
 		std::string str(s, len);
 		trimstring(str);
-		switch (m_path.back()[0]) {
-		case 'd':
-			if (!m_path.back().compare("dc:title")) {
-				m_tobj.m_title = str;
-				m_tobj.name = titleToPathElt(std::move(str));
-			}
 
-			break;
+		TagType type = tag_table_lookup(upnp_tags,
+						m_path.back().c_str());
+		if (type != TAG_NUM_OF_ITEM_TYPES) {
+			tag.AddItem(type, str.c_str());
+
+			if (type == TAG_TITLE)
+				m_tobj.name = titleToPathElt(std::move(str));
+
+			return;
+		}
+
+		switch (m_path.back()[0]) {
 		case 'r':
 			if (!m_path.back().compare("res")) {
 				m_tobj.url = str;
@@ -178,10 +181,6 @@ protected:
 				m_tobj.item_class = ParseItemClass(str.c_str());
 				break;
 			}
-
-			for (auto i = upnptags; *i != nullptr; ++i)
-				if (!m_path.back().compare(*i))
-					m_tobj.m_props[*i] += str;
 			break;
 		}
 	}

src/db/upnp/Object.hxx

@@ -20,8 +20,9 @@
 #ifndef MPD_UPNP_OBJECT_HXX
 #define MPD_UPNP_OBJECT_HXX
 
+#include "tag/Tag.hxx"
+
 #include <string>
-#include <map>
 
 /**
  * UpnP Media Server directory entry, converted from XML data.
@@ -61,43 +62,21 @@ public:
 	std::string m_title; // dc:title. Directory name for a container.
 	Type type;
 	ItemClass item_class;
-	// Properties as gathered from the XML document (url, artist, etc.)
-	// The map keys are the XML tag or attribute names.
-	std::map<std::string, std::string> m_props;
 
-	/**
+	Tag tag;
-	 * Song duration in seconds.  0 if unknown.
-	 */
-	int duration;
 
 	UPnPDirObject() = default;
 	UPnPDirObject(UPnPDirObject &&) = default;
 	UPnPDirObject &operator=(UPnPDirObject &&) = default;
 
-	/** Get named property
-	 * @param property name (e.g. upnp:artist, upnp:album,
-	 *     upnp:originalTrackNumber, upnp:genre). Use m_title instead
-	 *     for dc:title.
-	 * @param[out] value
-	 * @return true if found.
-	 */
-	const char *getprop(const char *_name) const {
-		auto it = m_props.find(_name);
-		if (it == m_props.end())
-			return nullptr;
-		return it->second.c_str();
-	}
-
 	void clear()
 	{
 		m_id.clear();
 		m_pid.clear();
 		url.clear();
-		m_title.clear();
 		type = Type::UNKNOWN;
 		item_class = ItemClass::UNKNOWN;
-		m_props.clear();
+		tag.Clear();
-		duration = -1;
 	}
 };