From bc3220ae85375eed8ca6625c457552b1d3c22735 Mon Sep 17 00:00:00 2001
From: Anna Schumaker <schumaker.anna@gmail.com>
Date: Wed, 22 Jan 2014 21:17:51 -0500
Subject: [PATCH] playqueue: Generate a string representing current runtime.

I almost did this on the gui side, but then I remembered that this isn't
a trivial job.  I chose to stick with my rule: "if something can be done
in the backend then it should be done in the backend"

Signed-off-by: Anna Schumaker <schumaker.anna@gmail.com>
---
 include/playqueue.h |  1 +
 lib/playqueue.cpp   | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/include/playqueue.h b/include/playqueue.h
index fd729aed..634b23ce 100644
--- a/include/playqueue.h
+++ b/include/playqueue.h
@@ -32,6 +32,7 @@ public:
 	void unset_flag(playqueue_flags);
 	const unsigned int get_flags();
 	unsigned int get_length();
+	std::string get_length_str();
 
 	unsigned int add(unsigned int);
 	unsigned int add_front(unsigned int);
diff --git a/lib/playqueue.cpp b/lib/playqueue.cpp
index 19d5a9aa..ee7187cb 100644
--- a/lib/playqueue.cpp
+++ b/lib/playqueue.cpp
@@ -4,7 +4,13 @@
 #include <callback.h>
 #include <library.h>
 #include <playqueue.h>
+
 #include <stdlib.h>
+#include <sstream>
+
+#define O_MINUTES (60)
+#define O_HOURS   (60 * O_MINUTES)
+#define O_DAYS    (24 * O_HOURS)
 
 Playqueue :: Playqueue()
 	 : flags(0), cur(-1), length(0)
@@ -56,6 +62,36 @@ unsigned int Playqueue :: get_length()
 	return length;
 }
 
+static inline void add_duration(std::stringstream &ss, unsigned int dur,
+				unsigned int remaining, const std::string &field)
+{
+	if (dur > 0) {
+		ss << dur << " " << field;
+		if (remaining > 0)
+			ss << ", ";
+	}
+}
+
+std::string Playqueue :: get_length_str()
+{
+	std::stringstream ss;
+	unsigned int len = length;
+
+	unsigned int days = len / O_DAYS;
+	len -= days * O_DAYS;
+	add_duration(ss, days, len, "days");
+
+	unsigned int hours = len / O_HOURS;
+	len -= hours *O_HOURS;
+	add_duration(ss, hours, len, "hours");
+	unsigned int mins = len / O_MINUTES;
+	add_duration(ss, mins, len, "miutes");
+	unsigned int secs = len - (mins * O_MINUTES);
+	add_duration(ss, secs, 0, "seconds");
+
+	return ss.str();
+}
+
 unsigned int Playqueue :: add(unsigned int track_id)
 {
 	unsigned int id = tracks.size();