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Use local time

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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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43
server/src/config.mjs
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@@ -8,14 +8,39 @@ export function cfg() {
config({ path: resolve(ROOT, '.env'), override: true })
config({ path: resolve(ROOT, '.env.local'), override: true })
return {
PORT: process.env.PORT || 3000,
ADSB_URL: process.env.ADSB_URL || '',
INFLUX_URL: process.env.INFLUX_URL || 'http://localhost:8086',
INFLUX_TOKEN: process.env.INFLUX_TOKEN || '',
INFLUX_ORG: process.env.INFLUX_ORG || 'weather',
INFLUX_BUCKET: process.env.INFLUX_BUCKET || 'station',
LATITUDE: parseFloat(process.env.LATITUDE || '0'),
LONGITUDE: parseFloat(process.env.LONGITUDE || '0'),
ALTITUDE: parseFloat(process.env.ALTITUDE || '0'),
PORT: process.env.PORT || 3000,
ADSB_URL: process.env.ADSB_URL || '',
INFLUX_URL: process.env.INFLUX_URL || 'http://localhost:8086',
INFLUX_TOKEN: process.env.INFLUX_TOKEN || '',
INFLUX_ORG: process.env.INFLUX_ORG || 'weather',
INFLUX_BUCKET: process.env.INFLUX_BUCKET || 'station',
LATITUDE: parseFloat(process.env.LATITUDE || '0'),
LONGITUDE: parseFloat(process.env.LONGITUDE || '0'),
ALTITUDE: parseFloat(process.env.ALTITUDE || '0'),
TZ: process.env.TZ || 'UTC',
}
}
// Returns the UTC offset in minutes for the configured TZ at a given date
export function tzOffsetMinutes(date = new Date()) {
const tz = cfg().TZ
// Format the date in the target timezone and compare to UTC
const local = new Date(date.toLocaleString('en-US', { timeZone: tz }))
const utc = new Date(date.toLocaleString('en-US', { timeZone: 'UTC' }))
return Math.round((local - utc) / 60_000)
}
// Shift a UTC date to local-time-as-if-UTC (for day bucketing)
export function toLocalMidnight(date = new Date()) {
const offset = tzOffsetMinutes(date)
const local = new Date(date.getTime() + offset * 60_000)
local.setUTCHours(0, 0, 0, 0)
return local
}
// Get YYYY-MM-DD string in local timezone
export function localDateStr(date = new Date()) {
const offset = tzOffsetMinutes(date)
const shifted = new Date(date.getTime() + offset * 60_000)
return shifted.toISOString().slice(0, 10)
}