sessions.go

package main

import (
	"fmt"
	"time"
)

type Session struct {
	StartYear, EndYear int // inclusive
}

func (s Session) StartDate() time.Time {
	return time.Date(s.StartYear, time.January, 1, 0, 0, 0, 0, time.UTC)
}
func (s Session) EndDate() time.Time {
	return time.Date(s.EndYear+1, time.January, 1, 0, 0, 0, 0, time.UTC).Add(-1 * time.Minute)
}

func (s Session) IsCurrent() bool {
	return s.StartYear == CurrentSession.StartYear
}

func (s Session) Overlaps(start, end time.Time) bool {
	sy, ey := start.Year(), end.Year()
	switch {
	case sy >= s.StartYear && sy <= s.EndYear:
		return true
	case ey >= s.StartYear && ey <= s.EndYear:
		return true
	case sy < s.StartYear && ey > s.EndYear:
		return true
	}
	return false
}

func (s Session) Contains(t time.Time) bool {
	ty := t.Year()
	return ty >= s.StartYear && ty <= s.EndYear
}

func FindSession(year int) Session {
	for _, ss := range Sessions {
		if year >= ss.StartYear && year <= ss.EndYear {
			return ss
		}
	}
	return Session{}
}

func (s Session) String() string { return fmt.Sprintf("%d-%d", s.StartYear, s.EndYear) }

var Sessions = []Session{
	{2024, 2025},
	{2022, 2023},
	{2018, 2021},
	{2014, 2017},
	{2010, 2013},
	{2006, 2009},
	{2004, 2005},
	{2002, 2003},
	{1998, 2001},
}
var CurrentSession = Sessions[0]