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Use local time

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This commit is contained in:
Zakary Timson
2026-06-24 20:31:58 -04:00
parent d6e799e956
commit 60f76b06d4
13 changed files with 476 additions and 309 deletions
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58
server/src/openmeteo.mjs
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@@ -1,8 +1,8 @@
// openmeteo.mjs
import { createWriteStream, existsSync, mkdirSync } from 'fs'
import { resolve, dirname } from 'path'
import { fileURLToPath } from 'url'
import { pipeline } from 'stream/promises'
import { localDateStr } from './config.mjs'
const DIR = dirname(fileURLToPath(import.meta.url))
const ICON_DIR = resolve(DIR, 'public', 'icons')
@@ -53,8 +53,6 @@ async function cachedFetch(key, url) {
return data
}
// ── Physics helpers (mirror forecast.mjs — no import to keep this self-contained) ──
function dewPoint(tempC, humidity) {
const a = 17.27, b = 237.7
const gamma = (a * tempC) / (b + tempC) + Math.log(humidity / 100)
@@ -98,16 +96,6 @@ function cloudsLabel(fraction) {
return 'Overcast'
}
function airQualityLabel(aqi) {
if (!aqi) return null
if (aqi <= 50) return 'Good'
if (aqi <= 100) return 'Moderate'
if (aqi <= 150) return 'Unhealthy for Sensitive'
if (aqi <= 200) return 'Unhealthy'
if (aqi <= 300) return 'Very Unhealthy'
return 'Hazardous'
}
// ── Daily ─────────────────────────────────────────────────────────────────────
const DAILY_FIELDS = [
@@ -133,13 +121,17 @@ export async function dailyWeather(lat, lon, start, end) {
const temp = data.daily.temperature_2m_max[i]
const humidity = data.daily.relative_humidity_2m_mean[i]
const uv = data.daily.uv_index_max[i]
const clouds = null // not available in daily
// Open-Meteo returns local date strings — parse as local midnight using TZ
// e.g. "2026-03-01" → local midnight, not UTC midnight
const tzOffset = (new Date(new Date().toLocaleString('en-US', { timeZone: require('./config.mjs').cfg().TZ })) - new Date(new Date().toLocaleString('en-US', { timeZone: 'UTC' }))) / 60_000
const localMidnight = new Date(new Date(`${time}T00:00:00Z`).getTime() - tzOffset * 60_000)
return {
label: WMO[code] || 'Unknown',
icon,
code,
time: new Date(time + 'T00:00:00Z'),
time: localMidnight,
temperature: temp,
temperature_max: temp,
temperature_min: data.daily.temperature_2m_min[i],
@@ -156,9 +148,9 @@ export async function dailyWeather(lat, lon, start, end) {
uv_index: uv,
uv_index_label: uvLabel(uv),
solar_wm2: data.daily.shortwave_radiation_sum[i],
clouds,
sunrise: data.daily.sunrise[i],
sunset: data.daily.sunset[i],
clouds: null,
sunrise: data.daily.sunrise[i] ? new Date(data.daily.sunrise[i]) : null,
sunset: data.daily.sunset[i] ? new Date(data.daily.sunset[i]) : null,
}
}))
}
@@ -178,25 +170,34 @@ export async function hourlyWeather(lat, lon, start, end) {
const startStr = start instanceof Date ? start.toISOString().slice(0, 10) : start.slice(0, 10)
const endStr = end instanceof Date ? end.toISOString().slice(0, 10) : end.slice(0, 10)
const url = `https://api.open-meteo.com/v1/forecast?latitude=${lat}&longitude=${lon}` +
`&hourly=${HOURLY_FIELDS}&timezone=auto&start_date=${startStr}&end_date=${endStr}`
`&hourly=${HOURLY_FIELDS}&daily=sunrise,sunset&timezone=auto&start_date=${startStr}&end_date=${endStr}`
const data = await cachedFetch(`hourly_${lat}_${lon}_${startStr}_${endStr}`, url)
if (!data?.hourly?.time) return []
// Build sunrise/sunset map keyed by local date string from Open-Meteo
// Open-Meteo returns these as local time ISO strings e.g. "2026-03-01T06:45"
const sunMap = {}
if (data.daily?.time) {
data.daily.time.forEach((date, i) => {
sunMap[date] = { sunrise: data.daily.sunrise[i], sunset: data.daily.sunset[i] }
sunMap[date] = {
sunrise: data.daily.sunrise[i] ? new Date(data.daily.sunrise[i]) : null,
sunset: data.daily.sunset[i] ? new Date(data.daily.sunset[i]) : null,
}
})
}
return Promise.all(data.hourly.time.map(async (time, i) => {
const date = time.slice(0, 10)
const sun = sunMap[date] ?? {}
const t = new Date(time).getTime()
const daytime = sun.sunrise && sun.sunset
? t >= new Date(sun.sunrise).getTime() && t < new Date(sun.sunset).getTime()
// Open-Meteo returns local time strings — treat as UTC-equivalent for Date parsing
// then key into sunMap using the local date portion
const slotDate = new Date(time) // parsed as local ISO (no Z suffix) — browser/node both treat naive as local
const dateKey = localDateStr(slotDate)
const sun = sunMap[dateKey] ?? {}
const t = slotDate.getTime()
const daytime = sun.sunrise && sun.sunset
? t >= sun.sunrise.getTime() && t < sun.sunset.getTime()
: false
const code = data.hourly.weathercode[i]
const icon = await ensureIcon(code).catch(() => null)
const temp = data.hourly.temperature_2m[i]
@@ -205,7 +206,7 @@ export async function hourlyWeather(lat, lon, start, end) {
const clouds = Math.round(data.hourly.cloudcover[i]) / 100
return {
time: time,
time: slotDate,
daytime,
label: WMO[code] || 'Unknown',
icon,
@@ -215,8 +216,7 @@ export async function hourlyWeather(lat, lon, start, end) {
humidity_abs: absoluteHumidity(temp, humidity),
dew_point: dewPoint(temp, humidity),
heat_index: heatIndex(temp, humidity),
vapor_pressure_deficit: data.hourly.vapour_pressure_deficit[i]
?? vaporPressureDeficit(temp, humidity),
vapor_pressure_deficit: data.hourly.vapour_pressure_deficit[i] ?? vaporPressureDeficit(temp, humidity),
pressure_hpa: data.hourly.surface_pressure[i],
precipitation: data.hourly.precipitation[i],
precipitation_chance: data.hourly.precipitation_probability[i],
@@ -228,7 +228,7 @@ export async function hourlyWeather(lat, lon, start, end) {
solar_wm2: data.hourly.shortwave_radiation[i],
clouds_label: cloudsLabel(clouds),
visibility: data.hourly.visibility[i] != null
? Math.round(data.hourly.visibility[i] / 1000 * 10) / 10 // m → km
? Math.round(data.hourly.visibility[i] / 1000 * 10) / 10
: null,
}
}))