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drizzli/src/routes/weather/+page.svelte
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2026-01-07 22:24:02 +01:00

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Svelte

<script lang="ts">
import { onMount } from 'svelte';
import { fade } from 'svelte/transition';
import { fetchWeatherApi } from 'openmeteo';
import { type GeoLocation, storedLocation } from '$lib/stores/settings';
import { urlHashStore } from '$lib/stores/url-hash-store';
import { Label } from '$lib/components/ui/label';
import * as Select from '$lib/components/ui/select';
import LocationSearch from '$lib/components/location/location-search.svelte';
import cloudCover from './canvas/cloud-cover';
import daylight from './canvas/daylight';
import precip from './canvas/precip';
import raster from './canvas/raster';
import tempGradient from './canvas/temp-gradient';
import { defaultParameters, models } from './options';
import { getColor } from './utils/colors';
import weatherCodes from './utils/weather-codes';
const params = urlHashStore({
latitude: [$storedLocation.latitude],
longitude: [$storedLocation.longitude],
models: 'best_match',
...defaultParameters
});
let location = $state($storedLocation);
storedLocation.subscribe((value) => {
location = value;
});
let diffTemp: number | undefined = $state();
let maxTemp: number | undefined = $state();
let weatherCodesHourly: Float32Array | null | undefined = $state();
let canvasElement: HTMLCanvasElement | null | undefined = $state();
const today = new Date();
let selectedDay = $state(new Date());
let selectedDayIndex = $state(1);
let entries = $state(0);
let weather = $derived(
(async (location: GeoLocation) => {
const reqParams = {
latitude: location.latitude,
longitude: location.longitude,
elevation: location.elevation,
// timezone: location.timezone, ???
models: [$params.models],
hourly: [
'precipitation',
'precipitation_probability',
'temperature_2m',
'weather_code',
'windspeed_10m',
'winddirection_10m',
'cloud_cover',
'relative_humidity_2m'
].join(','),
forecast_days: 6,
past_days: 1,
temperature_unit: $params.temperature_unit,
wind_speed_unit: $params.wind_speed_unit,
precipitation_unit: $params.precipitation_unit
};
const url = 'https://api.open-meteo.com/v1/forecast';
const responses = await fetchWeatherApi(url, reqParams);
const response = responses[0];
const utcOffsetSeconds = response.utcOffsetSeconds();
const daily = response.daily()!;
const hourly = response.hourly()!;
weatherCodesHourly = hourly.variables(3)?.valuesArray();
let hourlyTime = [
...Array((Number(hourly.timeEnd()) - Number(hourly.time())) / hourly.interval())
].map(
(_, i) =>
new Date((Number(hourly.time()) + i * hourly.interval() + utcOffsetSeconds) * 1000)
);
const hourlyTemps = hourly.variables(2)?.valuesArray();
const hourlyCloudCover = hourly.variables(6)?.valuesArray();
const hourlyPrecip = hourly.variables(0)?.valuesArray();
const indexes = [];
for (const [index, _] of hourlyTemps.entries()) {
indexes.push(index);
}
const maxX = 10000;
const maxY = 500;
const deltaX = 10000 / hourly.variables(0)?.valuesArray()?.length;
const ctx = canvasElement?.getContext('2d');
if (ctx) {
ctx.clearRect(0, 0, maxX, maxY);
const minTemp = Math.min(
...hourly
.variables(2)
?.valuesArray()
.filter((t) => !isNaN(t))
);
maxTemp = Math.max(
...hourly
.variables(2)
?.valuesArray()
.filter((t) => !isNaN(t))
);
diffTemp = maxTemp - minTemp;
const config: ConfigInterface = {
maxX: maxX,
maxY: maxY,
deltaX: deltaX,
minTemp: minTemp,
maxTemp: maxTemp,
diffTemp: diffTemp
};
// create canvas
daylight(ctx, config, hourlyTime);
raster(ctx, config, hourlyTime, today, canvasElement);
tempGradient(ctx, config, hourlyTemps, $params.temperature_unit);
cloudCover(ctx, config, hourlyCloudCover, canvasElement);
precip(ctx, config, hourlyPrecip, canvasElement);
}
return {
entries: [
{
id: 0,
name: 'temperature_2m',
title: 'Temperature',
values: hourly
.variables(2)
?.valuesArray()
?.map((t) => t.toFixed(1))
},
{
id: 1,
name: 'precipitation',
title: 'Precipitation',
values: hourly
.variables(0)
?.valuesArray()
?.map((p) => p.toFixed(1))
},
{
id: 2,
name: 'precipitation_probability',
title: 'Precip Prob.',
values: hourly
.variables(1)
?.valuesArray()
?.map((p) => p.toFixed(0))
},
{
id: 3,
name: 'windspeed_10m',
title: 'Wind',
values: hourly
.variables(4)
?.valuesArray()
?.map((p) => p.toFixed(0))
},
{
id: 4,
name: 'relative_humidity_2m',
title: 'Rel. Hum.',
values: hourly
.variables(7)
?.valuesArray()
?.map((p) => p.toFixed(0))
}
],
entriesLength: hourly.variables(0)?.valuesArray()?.length,
hourlyTime: hourlyTime,
windDirections: hourly.variables(5)?.valuesArray(),
indexes: indexes
};
})(location)
);
let weatherDaily = $derived(
(async (location: GeoLocation) => {
const reqParams = {
latitude: location.latitude,
longitude: location.longitude,
elevation: location.elevation,
// timezone: location.timezone, ???
models: [$params.models],
daily: [
'weather_code',
'temperature_2m_max',
'temperature_2m_min',
'sunrise',
'sunset',
'sunshine_duration',
'precipitation_sum',
'windspeed_10m_max',
'windgusts_10m_max',
'winddirection_10m_dominant'
].join(','),
forecast_days: 6,
past_days: 1,
temperature_unit: $params.temperature_unit,
wind_speed_unit: $params.wind_speed_unit,
precipitation_unit: $params.precipitation_unit
};
const url = 'https://api.open-meteo.com/v1/forecast';
const responses = await fetchWeatherApi(url, reqParams);
const response = responses[0];
const utcOffsetSeconds = response.utcOffsetSeconds();
const daily = response.daily()!;
return {
daily: {
time: [...Array((Number(daily.timeEnd()) - Number(daily.time())) / daily.interval())].map(
(_, i) =>
new Date((Number(daily.time()) + i * daily.interval() + utcOffsetSeconds) * 1000)
),
weather_code: daily.variables(0)!,
temperature_2m_max: daily.variables(1)!,
temperature_2m_min: daily.variables(2)!,
sunrise: daily.variables(3)!,
sunset: daily.variables(4)!,
sunshine_duration: daily.variables(5)!,
precipitation_sum: daily.variables(6)!,
windspeed_10m_max: daily.variables(7)!,
windgusts_10m_max: daily.variables(8)!,
winddirection_10m_dominant: daily.variables(9)!
}
};
})(location)
);
let winddir = true;
entries = 6;
let scrollDiv: HTMLElement = $state();
let tableCells;
const switchDay = (date: Date, index: number) => {
selectedDay = date;
tableCells = document.querySelectorAll('td.time');
for (let tableCell of tableCells) {
if (Number(tableCell.dataset['date']) === selectedDay.getDate()) {
scrollDiv.scrollTo({ left: tableCell.offsetLeft - 110, behavior: 'smooth' });
break;
}
}
selectedDayIndex = index;
};
onMount(() => {
setTimeout(() => {
tableCells = document.querySelectorAll('td.time');
for (let tableCell of tableCells) {
if (Number(tableCell.dataset['date']) === selectedDay.getDate()) {
scrollDiv.scrollTo({ left: tableCell.offsetLeft - 110 });
break;
}
}
}, 150);
document.onkeydown = (e) => {
if (!scrollDiv === document.activeElement || !scrollDiv.contains(document.activeElement)) {
if (e.key === 'ArrowLeft') {
if (selectedDay.getDate() >= today.getDate()) {
let newDate = new Date();
newDate.setDate(selectedDay.getDate() - 1);
switchDay(newDate);
}
}
if (e.key === 'ArrowRight') {
if (selectedDay.getDate() <= today.getDate() + 4) {
let newDate = new Date();
newDate.setDate(selectedDay.getDate() + 1);
switchDay(newDate);
}
}
}
};
});
let modelSelected = $derived(models.find((mo) => String(mo.value) === $params.models));
// let modelSelectedValue = $derived($params.models[0]);
//
</script>
<svelte:head>
<title>Weather | Open-Meteo.com</title>
<link rel="canonical" href="https://open-meteo.com/en/weather" />
<meta name="description" content="segseg" />
</svelte:head>
<div class="">
<div class="weather-content" style="min-height: 50vh">
<div
in:fade
out:fade
style="min-height: 256px"
class="weather-week gap-md-2 mb-4 flex flex-col md:flex-row"
>
{#await weatherDaily then wd}
{#each wd.daily.time as time, index (index)}
{@const selected = time.getDate() === selectedDay.getDate()}
{#if !isNaN(wd.daily.temperature_2m_max.values(index).toFixed(1))}
<button
style="transition: 300ms; min-width: 13%; {selected ? 'transform: scale(1.025)' : ''}"
class="cursor-pointer"
onclick={() => {
switchDay(time, index);
}}
>
<div
class="gap-md-1 flex flex-row items-center justify-center rounded-xl p-1 md:flex-col md:justify-center md:p-3 {selected
? 'bg-accent'
: ''}"
>
<div class="weather-week-date">
<b>{time.getDate()} - {time.getMonth() + 1}</b>
</div>
<div
data-text={time.toLocaleDateString('en-GB', { weekday: 'long' })}
class="grow-text relative mx-auto inline-flex flex-col {selected
? 'font-bold'
: ''}"
>
{time.toLocaleDateString('en-GB', { weekday: 'long' })}
</div>
<div class="weather-week-icon pe-none py-2">
<svg class="fill-foreground" width="60px" height="60px">
<use
xlink:href="/images/weather-icons/wi-day-{weatherCodes[
wd.daily.weather_code.values(index)
]}.svg#Layer_1"
></use>
</svg>
</div>
<div
class="weather-temp-max flex min-w-[65px] justify-center rounded-t p-1 text-sm"
style={`background-color: ${getColor(wd.daily.temperature_2m_max.values(index).toFixed(0), $params.temperature_unit)}; color: ${wd.daily.temperature_2m_min.values(index) < ($params.temperature_unit === 'celsius' ? 4 : 7) || wd.daily.temperature_2m_min.values(index) >= ($params.temperature_unit === 'celsius' ? 30 : 104) ? 'white' : 'black'}`}
>
{wd.daily.temperature_2m_max.values(index).toFixed(1)}
{$params.temperature_unit === 'celsius' ? '°C' : '°F'}
</div>
<div
class="weather-temp-min flex min-w-[65px] justify-center rounded-b p-1 text-sm"
style={`background: ${getColor(wd.daily.temperature_2m_min.values(index).toFixed(0), $params.temperature_unit)}; color: ${wd.daily.temperature_2m_min.values(index) < ($params.temperature_unit === 'celsius' ? 4 : 7) || wd.daily.temperature_2m_min.values(index) >= ($params.temperature_unit === 'celsius' ? 30 : 104) ? 'white' : 'black'}`}
>
{wd.daily.temperature_2m_min.values(index).toFixed(1)}
{$params.temperature_unit === 'celsius' ? '°C' : '°F'}
</div>
<div class="mt-2 flex items-center justify-center gap-1">
<div class="relative flex h-6 w-6 items-center justify-center">
<div class="absolute">
<svg class="fill-foreground" width="26px" height="26px">
<use
class="stroke-2"
xlink:href="/images/weather-icons/wi-day-sunny.svg#Layer_1"
></use>
</svg>
</div>
</div>
{Number(wd.daily.sunshine_duration.values(index) / 3600).toFixed(0)}h
</div>
<div class="mt-1 flex items-center justify-center">
<div class="relative flex h-6 w-6 items-center justify-center">
<div class="absolute">
<svg class="fill-foreground" width="28px" height="28px">
<use
class="stroke-2"
xlink:href="/images/weather-icons/wi-raindrop.svg#Layer_1"
></use>
</svg>
</div>
</div>
{Number(wd.daily.precipitation_sum.values(index)).toFixed(
1
)}{$params.precipitation_unit === 'mm' ? 'mm' : "'"}
</div>
</div>
</button>
{/if}
{/each}
{:catch error}
<p style="color: red">{error.message}</p>
{/await}
</div>
<div class="ml-22 md:ml-0">
<h3 class="text-xl font-bold">
{selectedDay.toLocaleDateString('en-GB', { weekday: 'long' })}
<small>
{selectedDay.getDate() === new Date(today.getTime() - 24 * 60 * 60 * 1000).getDate()
? ' (Yesterday)'
: ''}
{selectedDay.getDate() === today.getDate() ? ' (Today)' : ''}
{selectedDay.getDate() === new Date(today.getTime() + 24 * 60 * 60 * 1000).getDate()
? ' (Tomorrow)'
: ''}
</small>
</h3>
</div>
<div
bind:this={scrollDiv}
style=" height: {218 + entries * 27.5}px; "
class="w-ful relative -mx-5 overflow-x-scroll overflow-y-hidden md:-ml-[110px]"
>
<canvas
bind:this={canvasElement}
id="weather_week_canvas"
class="border border-border"
style="margin-top: 24px; margin-left: 110px; width: 5000px; height: 200px; "
height="500px"
width="10000px"
></canvas>
<table in:fade class="absolute bottom-0 border-b border-border">
<caption style="display:none"> Weather Week {location.name} </caption>
<tbody>
{#await weather then weather}
<tr>
<th
scope="row"
class="time"
style="color: transparent; padding-left: 4px; background: transparent; left: 0px; min-width: 110px; max-width: 110px; position: sticky;"
>Time</th
>
{#each weather.indexes as index, j (j)}
<td
class="time {weather.hourlyTime[index].getDate() === today.getDate() &&
weather.hourlyTime[index].getHours() === today.getHours()
? 'now'
: ''}"
data-date={weather.hourlyTime[index].getDate()}
data-time={weather.hourlyTime[index].getHours() + ':00'}
style="font-size: 11px; position: absolute; bottom: {188 +
27 * entries}px; left:{111 +
(5000 / weather.entriesLength) * index}px; min-width: {5000 /
weather.entriesLength}px; max-width: {5000 / weather.entriesLength}px;"
>{weather.hourlyTime[index].getHours() < 10 ? '0' : ''}{weather.hourlyTime[
index
].getHours()}</td
>
{/each}
</tr>
<!-- icons -->
<tr>
<th
scope="row"
style="color: transparent; padding-left: 4px; background: transparent; left: 0px; min-width: 110px; max-width: 110px; position: sticky;"
>Icons</th
>
{#each weather.indexes as index, j (j)}
{@const now =
weather.hourlyTime[index].getDate() === today.getDate() &&
weather.hourlyTime[index].getHours() === today.getHours()}
<td
style="position: absolute; bottom: {27.5 * entries -
24 +
0.8 * 200 -
0.54 *
200 *
((maxTemp - weather.entries[0].values[index]) / diffTemp)}px; left:{116 +
(5000 / weather.entriesLength) * index}px; min-width: {5000 /
weather.entriesLength}px; max-width: {5000 / weather.entriesLength}px;"
><svg class="fill-foreground {now ? 'scale-125' : ''}" width="20px" height="20px">
<use
class="stroke-2"
xlink:href="/images/weather-icons/wi-{weather.hourlyTime[index].getHours() >
6 && weather.hourlyTime[index].getHours() < 21
? 'day'
: 'night'}-{weatherCodes[weatherCodesHourly[index]]}.svg#Layer_1"
></use>
</svg></td
>
{/each}
</tr>
<!-- min / max -->
<tr>
<th
scope="row"
style="color: transparent; padding-left: 4px; background: transparent; left: 0px; min-width: 110px; max-width: 110px; position: sticky;"
>Temp graph</th
>
{#each weather.indexes as index, j (j)}
{@const temp = weather.entries[0].values[index]}
{#if !isNaN(temp)}
<td
class={weather.hourlyTime[index].getDate() === today.getDate() &&
weather.hourlyTime[index].getHours() === today.getHours()
? 'now'
: ''}
style="position: absolute; bottom: {27.5 * entries -
49 +
0.8 * 200 -
0.55 * 200 * ((maxTemp - temp) / diffTemp)}px; left:{111 +
(5000 / weather.entriesLength) * index}px; min-width: {5000 /
weather.entriesLength}px; max-width: {5000 / weather.entriesLength}px;"
>{temp.toFixed(0)}</td
>
{/if}
{/each}
</tr>
{#each weather.entries as entry, i (i)}
<tr class="border-t border-border">
<th
scope="row"
class="bg-background text-left"
style="left: 0px; min-width: 110px; max-width: 110px; position: sticky;"
>{entry.title}</th
>
{#each weather.indexes as index, j (j)}
{#if !isNaN(entry.values[index])}
<td
class="border-r border-border {weather.hourlyTime[index].getDate() ===
today.getDate() && weather.hourlyTime[index].getHours() === today.getHours()
? 'now'
: ''}"
style="min-width: {5000 / weather.entriesLength}px; max-width: {5000 /
weather.entriesLength}px;
{entry.name === 'temperature_2m'
? 'background: ' +
getColor(
weather.entries[0].values[index].toFixed(0),
$params.temperature_unit
)
: ''};
{entry.name === 'temperature_2m'
? 'color: ' +
(weather.entries[0].values[index] <
($params.temperature_unit === 'celsius' ? -13 : 7) ||
weather.entries[0].values[index] >=
($params.temperature_unit === 'celsius' ? 40 : 104)
? 'white'
: 'black')
: ''};
{entry.name === 'precipitation_probability'
? 'background: rgba(0, 0, 230,' +
weather.entries[2].values[index] / 120 +
')'
: ''};
{entry.name === 'precipitation_probability'
? 'color: ' +
(weather.entries[2].values[index] > 50
? 'white'
: 'hsl(var(--foreground)')
: ''};
{entry.name === 'relative_humidity_2m'
? 'background: rgba(0, 240, 240,' +
weather.entries[4].values[index] ** 3.8 / 10 ** 8.2 +
')'
: ''};"
>{entry.name === 'precipitation' || entry.name === 'temperature_2m'
? entry.values[index].toFixed(1)
: entry.values[index]}</td
>
{/if}
{/each}
</tr>
{/each}
{#if winddir}
<!-- winddir -->
<tr class="border-t border-border">
<th
scope="row"
class="bg-background text-left"
style="z-index: 20; left: 0px; min-width: 110px; max-width: 110px; position: sticky;"
>Wind Dir.</th
>
{#each weather.indexes as index, j (j)}
{#if !isNaN(weather.windDirections[index])}
<td
class="border-r border-border {weather.hourlyTime[index].getDate() ===
today.getDate() && weather.hourlyTime[index].getHours() === today.getHours()
? 'now'
: ''}"
style="transform: rotate({weather.windDirections[
index
]}deg);min-width: {5000 / weather.entriesLength}px; max-width: {5000 /
weather.entriesLength}px;"
><svg class="fill-foreground" width="25px" height="25px">
<use xlink:href="/images/weather-icons/wi-direction-down.svg#Layer_1"></use>
</svg></td
>
{/if}
{/each}
</tr>
{/if}
{/await}
</tbody>
</table>
</div>
</div>
{#await weatherDaily then wd}
{@const sunrise = new Date(Number(wd.daily.sunrise.valuesInt64(selectedDayIndex)) * 1000)}
{@const sunset = new Date(Number(wd.daily.sunset.valuesInt64(selectedDayIndex)) * 1000)}
<div class="mt-6">
<div class="flex items-center gap-1">
<svg class="fill-foreground" width="28px" height="28px">
<use class="stroke-2" xlink:href="/images/weather-icons/wi-sunrise.svg#Layer_1"></use>
</svg>Sunrise: {pad(sunrise.getHours())}:{pad(sunrise.getMinutes())}
</div>
<div class="flex items-center gap-1">
<svg class="fill-foreground" width="28px" height="28px">
<use class="stroke-2" xlink:href="/images/weather-icons/wi-sunset.svg#Layer_1"></use>
</svg>
Sunset: {pad(sunset.getHours())}:{pad(sunset.getMinutes())}
</div>
</div>
{/await}
<div>
<div class="mt-6 flex gap-6 md:mt-12">
<div class="relative w-1/2">
<Select.Root name="model_selection" type="single" bind:value={$params.models}>
<Select.Trigger
aria-label="Forecast days input"
class="h-12 cursor-pointer pt-6 [&_svg]:mb-3">{modelSelected?.label}</Select.Trigger
>
<Select.Content preventScroll={false} class="border-border">
{#each models as mo}
<Select.Item class="cursor-pointer" value={mo.value}>{mo.label}</Select.Item>
{/each}
</Select.Content>
<Label class="absolute top-[0.35rem] left-2 z-10 px-1 text-xs text-muted-foreground"
>Weather model</Label
>
</Select.Root>
</div>
<div class="relative w-1/2">
<LocationSearch
style="height: 40px"
on:location={(event) => storedLocation.set(event.detail)}
label="Search Location"
/>
</div>
</div>
</div>
<div class="mt-6 mb-6">
<h2 class="text-2xl md:text-3xl">Color scale example</h2>
<div class="mt-3 grid grid-cols-4 md:mt-6">
{#if $params.temperature_unit == 'celsius'}
{#each [...Array(101).keys()].map((i) => -40 + i) as temp}
<div
class="weather-temp-max flex min-w-[70px] justify-center rounded p-1"
style={`background-color: ${getColor(temp, $params.temperature_unit)}; color: ${temp <= ($params.temperature_unit === 'celsius' ? 4 : 7) || temp >= ($params.temperature_unit === 'celsius' ? 30 : 104) ? 'white' : 'black'}`}
>
{temp} °C <br />
{getColor(temp, $params.temperature_unit)}
</div>
{/each}
{:else}
{#each [...Array(91).keys()].map((i) => -40 + i * 2) as temp}
<div
class="weather-temp-max flex min-w-[70px] justify-center rounded p-1"
style={`background-color: ${getColor(temp, $params.temperature_unit)}; color: ${temp <= ($params.temperature_unit === 'celsius' ? 4 : 7) || temp >= ($params.temperature_unit === 'celsius' ? 30 : 104) ? 'white' : 'black'}`}
>
{temp}
{$params.temperature_unit === 'celsius' ? '°C' : '°F'}<br />
{getColor(temp, $params.temperature_unit)}
</div>
{/each}
{/if}
</div>
</div>
</div>
<style>
.now {
font-weight: bold;
}
td {
text-align: center;
font-size: 13px;
}
.weather-week-icon {
width: 100%;
display: flex;
justify-content: center;
align-items: center;
background: #0061a5;
margin: 5px 0;
border-radius: 5px;
}
</style>