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72 lines
3.2 KiB
JavaScript
72 lines
3.2 KiB
JavaScript
// wttr forecast — multi-day forecast for a location.
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//
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// Endpoint: GET /<location>?format=j1 → returns weather[] (3 days max on free tier).
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// Each day is collapsed into a single row with min/max/avg + summary description.
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import { cli, Strategy } from '@jackwener/opencli/registry';
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import { ArgumentError, EmptyResultError } from '@jackwener/opencli/errors';
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import { requireString, wttrFetch, pickWeatherDesc } from './utils.js';
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cli({
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site: 'wttr',
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name: 'forecast',
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access: 'read',
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description: 'Multi-day weather forecast (up to 3 days, wttr.in free tier max)',
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domain: 'wttr.in',
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strategy: Strategy.PUBLIC,
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browser: false,
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args: [
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{
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name: 'location',
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positional: true,
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required: true,
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help: 'City name, "lat,lon", airport ICAO code, or "@domain"',
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},
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{
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name: 'days',
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type: 'int',
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default: 3,
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help: 'Max forecast days (1-3, wttr.in caps the response at 3 days)',
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},
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],
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columns: [
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'rank', 'date', 'minTempC', 'maxTempC', 'avgTempC',
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'minTempF', 'maxTempF', 'avgTempF',
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'sunHour', 'totalSnowCm', 'uvIndex',
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'description', 'sunrise', 'sunset',
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],
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func: async (args) => {
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const location = requireString(args.location, 'location');
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const days = Number(args.days ?? 3);
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if (!Number.isInteger(days) || days < 1 || days > 3) {
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throw new ArgumentError('--days must be an integer between 1 and 3 (wttr.in caps the free-tier forecast at 3 days)');
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}
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const body = await wttrFetch(location, 'wttr forecast');
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const list = Array.isArray(body?.weather) ? body.weather : [];
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if (!list.length) {
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throw new EmptyResultError('wttr forecast', `wttr.in returned no forecast for "${location}".`);
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}
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return list.slice(0, days).map((day, i) => {
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// wttr.in's day-summary uses the noon hourly slot for "main" description.
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// Index 4 = 12:00 in their 3-hour-step hourly array.
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const noon = Array.isArray(day.hourly) && day.hourly[4] ? day.hourly[4] : day.hourly?.[0] ?? {};
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const astro = Array.isArray(day.astronomy) ? day.astronomy[0] : null;
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return {
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rank: i + 1,
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date: day.date ?? null,
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minTempC: day.mintempC != null ? Number(day.mintempC) : null,
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maxTempC: day.maxtempC != null ? Number(day.maxtempC) : null,
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avgTempC: day.avgtempC != null ? Number(day.avgtempC) : null,
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minTempF: day.mintempF != null ? Number(day.mintempF) : null,
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maxTempF: day.maxtempF != null ? Number(day.maxtempF) : null,
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avgTempF: day.avgtempF != null ? Number(day.avgtempF) : null,
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sunHour: day.sunHour != null ? Number(day.sunHour) : null,
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totalSnowCm: day.totalSnow_cm != null ? Number(day.totalSnow_cm) : null,
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uvIndex: day.uvIndex != null ? Number(day.uvIndex) : null,
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description: pickWeatherDesc(noon?.weatherDesc),
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sunrise: astro?.sunrise ?? null,
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sunset: astro?.sunset ?? null,
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};
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});
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},
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});
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