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Maurice
68a3036909
server/data is for runtime state (SQLite, backups, logs, tmp) — the airports snapshot is a shipped dataset, not user data, and it being in there forced us to poke a hole in both .dockerignore and .gitignore. Move it to server/assets/ and drop the exceptions; service and build script point at the new path.
109 lines
3.4 KiB
JavaScript
109 lines
3.4 KiB
JavaScript
#!/usr/bin/env node
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// Build server/assets/airports.json from OurAirports (davidmegginson.github.io/ourairports-data).
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// License: Public Domain. Keeps large/medium airports with an IATA code; timezone derived from coords via tz-lookup.
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import fs from 'node:fs'
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import path from 'node:path'
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import https from 'node:https'
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import { fileURLToPath } from 'node:url'
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import tzLookup from 'tz-lookup'
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const __dirname = path.dirname(fileURLToPath(import.meta.url))
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const OUT = path.join(__dirname, '..', 'assets', 'airports.json')
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const SRC = 'https://davidmegginson.github.io/ourairports-data/airports.csv'
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function fetchText(url) {
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return new Promise((resolve, reject) => {
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https.get(url, (res) => {
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if (res.statusCode !== 200) return reject(new Error(`HTTP ${res.statusCode}`))
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let data = ''
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res.setEncoding('utf8')
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res.on('data', chunk => { data += chunk })
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res.on('end', () => resolve(data))
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}).on('error', reject)
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})
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}
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function parseCsv(text) {
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const rows = []
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let row = []
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let cur = ''
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let inQuotes = false
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for (let i = 0; i < text.length; i++) {
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const ch = text[i]
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if (inQuotes) {
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if (ch === '"') {
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if (text[i + 1] === '"') { cur += '"'; i++ } else { inQuotes = false }
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} else {
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cur += ch
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}
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} else {
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if (ch === '"') inQuotes = true
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else if (ch === ',') { row.push(cur); cur = '' }
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else if (ch === '\n') { row.push(cur); rows.push(row); row = []; cur = '' }
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else if (ch === '\r') { /* skip */ }
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else cur += ch
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}
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}
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if (cur.length > 0 || row.length > 0) { row.push(cur); rows.push(row) }
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return rows
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}
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const raw = await fetchText(SRC)
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const rows = parseCsv(raw)
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const header = rows[0]
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const idx = (name) => header.indexOf(name)
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const TYPE = idx('type')
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const NAME = idx('name')
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const LAT = idx('latitude_deg')
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const LNG = idx('longitude_deg')
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const COUNTRY = idx('iso_country')
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const MUNICIPALITY = idx('municipality')
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const SERVICE = idx('scheduled_service')
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const ICAO = idx('icao_code')
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const IATA = idx('iata_code')
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const KEEP = new Set(['large_airport', 'medium_airport'])
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const airports = []
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let skippedNoTz = 0
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for (let i = 1; i < rows.length; i++) {
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const r = rows[i]
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if (!r || r.length < header.length) continue
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if (!KEEP.has(r[TYPE])) continue
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const iata = r[IATA]?.trim().toUpperCase()
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if (!iata || iata.length !== 3) continue
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if (r[SERVICE] !== 'yes') continue
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const lat = Number(r[LAT])
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const lng = Number(r[LNG])
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if (!Number.isFinite(lat) || !Number.isFinite(lng)) continue
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let tz = null
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try { tz = tzLookup(lat, lng) } catch { skippedNoTz++; continue }
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if (!tz) { skippedNoTz++; continue }
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airports.push({
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iata,
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icao: r[ICAO]?.trim().toUpperCase() || null,
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name: r[NAME],
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city: r[MUNICIPALITY] || '',
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country: r[COUNTRY] || '',
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lat: Math.round(lat * 1e6) / 1e6,
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lng: Math.round(lng * 1e6) / 1e6,
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tz,
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})
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}
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const seen = new Map()
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for (const a of airports) {
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const existing = seen.get(a.iata)
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if (!existing) { seen.set(a.iata, a); continue }
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if (existing.icao && !a.icao) continue
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if (!existing.icao && a.icao) seen.set(a.iata, a)
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}
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const unique = Array.from(seen.values()).sort((a, b) => a.iata.localeCompare(b.iata))
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fs.writeFileSync(OUT, JSON.stringify(unique))
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const size = fs.statSync(OUT).size
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console.log(`Wrote ${unique.length} airports to ${OUT} (${(size / 1024).toFixed(1)} KB); skipped ${skippedNoTz} without timezone`)
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