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sunrise-sunset: refactor streak code

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This commit is contained in:
Thomas 2023-01-29 23:26:29 +00:00
parent 29e4cb0b6d
commit 6d6557d3cb
1 changed files with 14 additions and 15 deletions
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29
src/routes/sunrise-sunset/SunriseSunsetStreakCalculator.ts
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@ -29,24 +29,23 @@ export class SunriseSunsetStreakCalculator {
return 1;
}
let streakLength = 1;
for (const [index, day] of sortedDays.entries()) {
const nextDay = sortedDays[index + 1];
if (nextDay === undefined) {
console.log(`No next day, returning streak length of ${streakLength}`);
return streakLength;
}
const daysBetween = differenceInCalendarDays(day, nextDay);
console.log(`Days Between ${day} - ${nextDay}`, daysBetween);
// A (reverse-order) list of streaks in the lis tof correct days.
const allStreaks: number[] = sortedDays.reduce((streaks: number[], day, index, days) => {
const currentStreakLength = streaks[0] ?? 1;
const daysBetween = differenceInCalendarDays(day, days[index + 1]);
if (daysBetween === 1) {
streakLength++;
// The streak continues ! Add a day.
streaks[0] = currentStreakLength + 1;
} else {
console.log(`Days between is not 1, returning streak length of ${streakLength}`);
return streakLength;
// We've hit a gap, so start a new streak
streaks.unshift(1);
}
}
return streaks;
}, []);
// The streaks are in reverse order, so the most recent streak is the last one.
return allStreaks[allStreaks.length - 1];
}
}