Updated UI default next session detail

internal/ui/schedule.go

@@ -0,0 +1,140 @@
+package ui
+
+import (
+	"fmt"
+	"sort"
+	"time"
+
+	"github.com/AmanTahiliani/box-box/internal/models"
+)
+
+const defaultSessionDuration = 3 * time.Hour
+
+func parseScheduleTime(value string) (time.Time, error) {
+	if value == "" {
+		return time.Time{}, fmt.Errorf("empty time value")
+	}
+
+	t, err := time.Parse(time.RFC3339, value)
+	if err == nil {
+		return t.Local(), nil
+	}
+
+	t, err = time.Parse("2006-01-02", value[:min(len(value), 10)])
+	if err != nil {
+		return time.Time{}, err
+	}
+	return t.Local(), nil
+}
+
+func meetingStartTime(meeting models.Meeting) (time.Time, error) {
+	return parseScheduleTime(meeting.DateStart)
+}
+
+func meetingEndTime(meeting models.Meeting) (time.Time, error) {
+	if meeting.DateEnd != "" {
+		if end, err := parseScheduleTime(meeting.DateEnd); err == nil {
+			return end, nil
+		}
+	}
+
+	start, err := meetingStartTime(meeting)
+	if err != nil {
+		return time.Time{}, err
+	}
+	return start.Add(72 * time.Hour), nil
+}
+
+func sessionStartTime(session models.Session) (time.Time, error) {
+	return parseScheduleTime(session.DateStart)
+}
+
+func sessionEndTime(session models.Session) (time.Time, error) {
+	if session.DateEnd != "" {
+		if end, err := parseScheduleTime(session.DateEnd); err == nil {
+			return end, nil
+		}
+	}
+
+	start, err := sessionStartTime(session)
+	if err != nil {
+		return time.Time{}, err
+	}
+	return start.Add(defaultSessionDuration), nil
+}
+
+func sortSessionsByStart(sessions []models.Session) {
+	sort.Slice(sessions, func(i, j int) bool {
+		left, errLeft := sessionStartTime(sessions[i])
+		right, errRight := sessionStartTime(sessions[j])
+		if errLeft != nil || errRight != nil {
+			return sessions[i].DateStart < sessions[j].DateStart
+		}
+		return left.Before(right)
+	})
+}
+
+func currentMeeting(meetings []models.Meeting, now time.Time) *models.Meeting {
+	var selected *models.Meeting
+	var latest time.Time
+
+	for i := range meetings {
+		start, err := meetingStartTime(meetings[i])
+		if err != nil || start.After(now) {
+			continue
+		}
+		end, err := meetingEndTime(meetings[i])
+		if err != nil || now.After(end.Add(24*time.Hour)) {
+			continue
+		}
+		if selected == nil || start.After(latest) {
+			selected = &meetings[i]
+			latest = start
+		}
+	}
+
+	return selected
+}
+
+func nextUpcomingMeeting(meetings []models.Meeting, now time.Time) *models.Meeting {
+	for i := range meetings {
+		start, err := meetingStartTime(meetings[i])
+		if err != nil {
+			continue
+		}
+		if start.After(now) {
+			return &meetings[i]
+		}
+	}
+	return nil
+}
+
+func currentAndNextSession(sessions []models.Session, now time.Time) (*models.Session, *models.Session) {
+	for i := range sessions {
+		start, err := sessionStartTime(sessions[i])
+		if err != nil {
+			continue
+		}
+		end, err := sessionEndTime(sessions[i])
+		if err != nil {
+			continue
+		}
+
+		if (now.Equal(start) || now.After(start)) && now.Before(end) {
+			return &sessions[i], nil
+		}
+		if now.Before(start) {
+			return nil, &sessions[i]
+		}
+	}
+
+	return nil, nil
+}
+
+func meetingHasStarted(meeting models.Meeting, now time.Time) bool {
+	start, err := meetingStartTime(meeting)
+	if err != nil {
+		return false
+	}
+	return !now.Before(start)
+}