1 files changed, 70 insertions, 0 deletions
diff --git a/src/date.hh b/src/date.hh
new file mode 100644
index 0000000..8db396e
--- /dev/null
+++ b/src/date.hh
@@ -0,0 +1,70 @@
+#ifndef DATE_HH
+#define DATE_HH
+
+#include <string>
+#include <time.h>
+
+class Date {
+public:
+  Date()
+    : time_(-1) {}
+
+  Date(time_t time)
+    : time_(time) {}
+
+  Date(Date const&) = default;
+
+  Date& operator=(Date const&) = default;
+
+  bool empty() const {
+    return time_ < 0;
+  }
+
+  time_t value() const {
+    return time_;
+  }
+
+  // Return day of date (ie, set time to 00:00:00)
+  Date day(bool local_time = true) const;
+
+  bool operator==(Date const& date) const {
+    return empty() ? date.empty() : time_ == date.time_;
+  }
+
+  bool operator!=(Date const& date) const {
+    return !(*this == date);
+  }
+
+  bool operator<(Date const& date) const  {
+    if (empty())
+      return !date.empty();
+    if (date.empty())
+      return false;
+    return time_ < date.time_;
+  }
+
+  bool operator<=(Date const& date) const  {
+    return *this < date || *this == date;
+  }
+
+  bool operator>(Date const& date) const  {
+    return !(*this <= date);
+  }
+
+  bool operator>=(Date const& date) const  {
+    return !(*this < date);
+  }
+
+  // If str matches format, returns a non-empty date.
+  static Date from_format(std::string const& format,
+                          std::string const& str,
+                          bool local_time = true);
+
+  std::string to_format(std::string const& format,
+                        bool local_time = true) const;
+
+private:
+  time_t time_;
+};
+
+#endif  // DATE_HH