diff options
Diffstat (limited to 'packages/throughput-store/src/period.ts')
| -rw-r--r-- | packages/throughput-store/src/period.ts | 132 |
1 files changed, 66 insertions, 66 deletions
diff --git a/packages/throughput-store/src/period.ts b/packages/throughput-store/src/period.ts index d8225f8..4b84528 100644 --- a/packages/throughput-store/src/period.ts +++ b/packages/throughput-store/src/period.ts @@ -15,55 +15,55 @@ export type Period = "day" | "week" | "month"; export interface ResolvedPeriod { - readonly ok: true; - /** Inclusive start, epoch-ms (local midnight). */ - readonly start: number; - /** Exclusive end, epoch-ms (local midnight). */ - readonly end: number; - /** Local `YYYY-MM-DD` day keys this period spans, in order. */ - readonly dayKeys: readonly string[]; - /** The normalized input date string. */ - readonly date: string; + readonly ok: true; + /** Inclusive start, epoch-ms (local midnight). */ + readonly start: number; + /** Exclusive end, epoch-ms (local midnight). */ + readonly end: number; + /** Local `YYYY-MM-DD` day keys this period spans, in order. */ + readonly dayKeys: readonly string[]; + /** The normalized input date string. */ + readonly date: string; } export interface PeriodError { - readonly ok: false; - readonly error: string; + readonly ok: false; + readonly error: string; } function pad2(n: number): string { - return n < 10 ? `0${n}` : String(n); + return n < 10 ? `0${n}` : String(n); } /** Local `YYYY-MM-DD` key for an epoch-ms timestamp. */ export function dayKeyOf(ts: number): string { - const d = new Date(ts); - return `${d.getFullYear()}-${pad2(d.getMonth() + 1)}-${pad2(d.getDate())}`; + const d = new Date(ts); + return `${d.getFullYear()}-${pad2(d.getMonth() + 1)}-${pad2(d.getDate())}`; } /** Local `YYYY-MM-DD` key for a local calendar date. */ function dayKey(year: number, monthIndex: number, day: number): string { - const d = new Date(year, monthIndex, day); - return `${d.getFullYear()}-${pad2(d.getMonth() + 1)}-${pad2(d.getDate())}`; + const d = new Date(year, monthIndex, day); + return `${d.getFullYear()}-${pad2(d.getMonth() + 1)}-${pad2(d.getDate())}`; } function parseYmd(date: string): { y: number; m: number; d: number } | null { - if (!/^\d{4}-\d{2}-\d{2}$/.test(date)) return null; - const [y, m, d] = date.split("-").map(Number) as [number, number, number]; - if (m < 1 || m > 12 || d < 1 || d > 31) return null; - // Reject impossible dates (e.g. 2026-02-30) by round-tripping through Date. - const probe = new Date(y, m - 1, d); - if (probe.getFullYear() !== y || probe.getMonth() !== m - 1 || probe.getDate() !== d) { - return null; - } - return { y, m, d }; + if (!/^\d{4}-\d{2}-\d{2}$/.test(date)) return null; + const [y, m, d] = date.split("-").map(Number) as [number, number, number]; + if (m < 1 || m > 12 || d < 1 || d > 31) return null; + // Reject impossible dates (e.g. 2026-02-30) by round-tripping through Date. + const probe = new Date(y, m - 1, d); + if (probe.getFullYear() !== y || probe.getMonth() !== m - 1 || probe.getDate() !== d) { + return null; + } + return { y, m, d }; } function parseYm(date: string): { y: number; m: number } | null { - if (!/^\d{4}-\d{2}$/.test(date)) return null; - const [y, m] = date.split("-").map(Number) as [number, number]; - if (m < 1 || m > 12) return null; - return { y, m }; + if (!/^\d{4}-\d{2}$/.test(date)) return null; + const [y, m] = date.split("-").map(Number) as [number, number]; + if (m < 1 || m > 12) return null; + return { y, m }; } /** @@ -71,43 +71,43 @@ function parseYm(date: string): { y: number; m: number } | null { * keys it covers. Returns a `PeriodError` for malformed input. */ export function resolvePeriod(period: Period, date: string): ResolvedPeriod | PeriodError { - if (period === "day") { - const p = parseYmd(date); - if (!p) return { ok: false, error: `invalid day date "${date}" (expected YYYY-MM-DD)` }; - const start = new Date(p.y, p.m - 1, p.d).getTime(); - const end = new Date(p.y, p.m - 1, p.d + 1).getTime(); - return { ok: true, start, end, dayKeys: [dayKey(p.y, p.m - 1, p.d)], date }; - } + if (period === "day") { + const p = parseYmd(date); + if (!p) return { ok: false, error: `invalid day date "${date}" (expected YYYY-MM-DD)` }; + const start = new Date(p.y, p.m - 1, p.d).getTime(); + const end = new Date(p.y, p.m - 1, p.d + 1).getTime(); + return { ok: true, start, end, dayKeys: [dayKey(p.y, p.m - 1, p.d)], date }; + } - if (period === "week") { - const p = parseYmd(date); - if (!p) return { ok: false, error: `invalid week date "${date}" (expected YYYY-MM-DD)` }; - // ISO week: Monday-based. JS getDay() is 0=Sun..6=Sat. - const base = new Date(p.y, p.m - 1, p.d); - const offset = (base.getDay() + 6) % 7; // days since Monday - const monStart = new Date(p.y, p.m - 1, p.d - offset); - const start = monStart.getTime(); - const end = new Date( - monStart.getFullYear(), - monStart.getMonth(), - monStart.getDate() + 7, - ).getTime(); - const dayKeys: string[] = []; - for (let i = 0; i < 7; i++) { - dayKeys.push(dayKey(monStart.getFullYear(), monStart.getMonth(), monStart.getDate() + i)); - } - return { ok: true, start, end, dayKeys, date }; - } + if (period === "week") { + const p = parseYmd(date); + if (!p) return { ok: false, error: `invalid week date "${date}" (expected YYYY-MM-DD)` }; + // ISO week: Monday-based. JS getDay() is 0=Sun..6=Sat. + const base = new Date(p.y, p.m - 1, p.d); + const offset = (base.getDay() + 6) % 7; // days since Monday + const monStart = new Date(p.y, p.m - 1, p.d - offset); + const start = monStart.getTime(); + const end = new Date( + monStart.getFullYear(), + monStart.getMonth(), + monStart.getDate() + 7, + ).getTime(); + const dayKeys: string[] = []; + for (let i = 0; i < 7; i++) { + dayKeys.push(dayKey(monStart.getFullYear(), monStart.getMonth(), monStart.getDate() + i)); + } + return { ok: true, start, end, dayKeys, date }; + } - // month - const p = parseYm(date); - if (!p) return { ok: false, error: `invalid month date "${date}" (expected YYYY-MM)` }; - const start = new Date(p.y, p.m - 1, 1).getTime(); - const end = new Date(p.y, p.m, 1).getTime(); - const lastDay = new Date(p.y, p.m, 0).getDate(); - const dayKeys: string[] = []; - for (let d = 1; d <= lastDay; d++) { - dayKeys.push(dayKey(p.y, p.m - 1, d)); - } - return { ok: true, start, end, dayKeys, date }; + // month + const p = parseYm(date); + if (!p) return { ok: false, error: `invalid month date "${date}" (expected YYYY-MM)` }; + const start = new Date(p.y, p.m - 1, 1).getTime(); + const end = new Date(p.y, p.m, 1).getTime(); + const lastDay = new Date(p.y, p.m, 0).getDate(); + const dayKeys: string[] = []; + for (let d = 1; d <= lastDay; d++) { + dayKeys.push(dayKey(p.y, p.m - 1, d)); + } + return { ok: true, start, end, dayKeys, date }; } |