weatherreporter/internal/changes/weekend.go

package changes

import (
	"fmt"

	"gitea.maximumdirect.net/eric/weatherreporter/internal/module"
)

func CompareWeekend(previous module.Snapshot, current module.Snapshot, thresholds Thresholds) ([]Change, error) {
	previousDayparts, err := requiredStanza[map[string]daypartSummaryStanza](previous, "derived_daypart_summaries")
	if err != nil {
		return nil, fmt.Errorf("previous weekend daypart summaries: %w", err)
	}
	currentDayparts, err := requiredStanza[map[string]daypartSummaryStanza](current, "derived_daypart_summaries")
	if err != nil {
		return nil, fmt.Errorf("current weekend daypart summaries: %w", err)
	}
	return compareOutlookDays(outlookDaysFromDayparts(previousDayparts), outlookDaysFromDayparts(currentDayparts), thresholds, "weekend_")
}