Reworked "find" to allow for more sophisticated searches.

The usage of the "find" command is as follows:
	find SEARCH
where SEARCH is either a simple string to search for, or key:value pairs
with the following keys:
	artist
	album
	title

1 files changed, 31 insertions, 14 deletions

diff --git a/commands.cpp b/commands.cpp
index 84c1e5f..76ce2ff 100644
--- a/commands.cpp
+++ b/commands.cpp
@@ -3,9 +3,13 @@
 #include <boost/format.hpp>
 #include <boost/algorithm/string/join.hpp>
 #include <boost/bind.hpp>
+#include <boost/spirit/include/qi.hpp>
+#include <boost/fusion/include/std_pair.hpp>
 
 #include <iostream>
 
+namespace qi = boost::spirit::qi;
+
 std::vector<std::string> Commands::ls() {
 	if(args.size() != 2) {
 		throw CommandException("usage: ls DIR");
@@ -29,24 +33,39 @@ std::vector<std::string> Commands::ls() {
 	return result;
 }
 
+typedef std::map<std::string, std::string> stringmap;
+
+static bool find_parse(std::string str, stringmap& foo) {
+	typedef std::string::const_iterator Iterator;
+
+	Iterator begin = str.begin();
+	Iterator end = str.end();
+
+	return qi::parse(begin, end,
+		// pairs wrapped in "quotes"
+		(('"' >> +(qi::char_ - ':') >> ':' >> +(qi::char_ - '"') >> '"') |
+		// simple key:value pairs
+		(+(qi::char_ - ':' - ' ') >> ':' >> +(qi::char_ - ' ')))
+		// skip spaces between pairs
+		% +qi::char_(' '),
+		foo) && begin == end;
+}
+
 std::vector<std::string> Commands::find() {
-	if(args.size() != 3) {
-		throw CommandException("usage: find TYPE SEARCH");
+	if(args.size() < 2) {
+		throw CommandException("usage: find SEARCH");
 	}
 
-	FindFunction ff;
-	if(find_handlers.find(args[1]) != find_handlers.end()) {
-		ff = find_handlers[args[1]];
+	stringmap find_args;
+	args.erase(args.begin());
+	std::string search = boost::algorithm::join(args, " ");
+	std::vector<MusicListing::p> ml;
+	if(find_parse(search, find_args)) {
+		ml = music::find(find_args);
 	} else {
-		std::vector<std::string> types;
-		for(std::map<std::string, FindFunction>::iterator it = find_handlers.begin(); it != find_handlers.end(); it++) {
-			types.push_back(it->first);
-		}
-		std::string s = boost::str(boost::format("unknown search type, must be one of %s") % boost::algorithm::join(types, ", "));
-		throw CommandException(s.c_str());
+		ml = music::find(search);
 	}
 
-	std::vector<MusicListing::p> ml = ff(args[2]);
 	if(!ml.size()) {
 		throw CommandException("no results");
 	}
@@ -56,7 +75,6 @@ std::vector<std::string> Commands::find() {
 		result.push_back((*it)->path.string());
 	}
 
-
 	return result;
 }
 
@@ -74,7 +92,6 @@ std::vector<std::string> Commands::update() {
 Commands::Commands(boost::asio::io_service& io_service_, std::vector<std::string>& args_) : io_service(io_service_), args(args_) {
 	handlers["ls"] = &Commands::ls;
 	handlers["find"] = &Commands::find;
-	find_handlers["artist"] = music::find_artist;
 	handlers["update"] = &Commands::update;
 }