From 44f19d0c0193f8731f07a21a2950f9163b3cfe5e Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Thu, 30 Jun 2016 16:45:54 -0400
Subject: [PATCH] helper: Added new quantizeToNMinutes function

---
 src/helper.cpp | 13 +++++++++++++
 src/timew.h    |  1 +
 2 files changed, 14 insertions(+)

diff --git a/src/helper.cpp b/src/helper.cpp
index 6aff6cea..28921949 100644
--- a/src/helper.cpp
+++ b/src/helper.cpp
@@ -296,6 +296,19 @@ int quantizeTo15Minutes (const int minutes)
   return minutes + 15 - deviation;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+int quantizeToNMinutes (const int minutes, const int N)
+{
+  if (minutes % N == 0)
+    return minutes;
+
+  auto deviation = minutes % N;
+  if (deviation < N/2)
+    return minutes - deviation;
+
+  return minutes + N - deviation;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Check rules to see if day is a holiday.
 bool dayIsHoliday (const Rules& rules, const Datetime& day)
diff --git a/src/timew.h b/src/timew.h
index 71c97a11..45c81f1e 100644
--- a/src/timew.h
+++ b/src/timew.h
@@ -70,6 +70,7 @@ std::string jsonFromIntervals (const std::vector <Interval>&);
 Palette createPalette (const Rules&);
 std::map <std::string, Color> createTagColorMap (const Rules&, Palette&, const std::vector <Interval>&);
 int quantizeTo15Minutes (const int);
+int quantizeToNMinutes (const int, const int);
 bool dayIsHoliday (const Rules&, const Datetime&);
 bool findHint (const CLI&, const std::string&);
 std::string minimalDelta (const Datetime&, const Datetime&);