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import type { StyleSpecification } from "react-map-gl/maplibre";
import type { Theme } from "~/AppContext";
export interface StyleLoaderOptions {
includeTraffic?: boolean;
}
export async function loadStyle(
styleName: string,
colorScheme: Theme,
options?: StyleLoaderOptions
): Promise<StyleSpecification> {
const { includeTraffic = true } = options || {};
if (colorScheme == "system") {
const isDarkMode = window.matchMedia(
"(prefers-color-scheme: dark)"
).matches;
colorScheme = isDarkMode ? "dark" : "light";
}
if (styleName == "openfreemap") {
const url = `/maps/styles/openfreemap-${colorScheme}.json`;
const resp = await fetch(url);
if (!resp.ok) {
throw new Error(`Failed to load style: ${url}`);
}
const style = await resp.json();
// Remove traffic layers if not requested
if (!includeTraffic) {
style.layers = (style.layers || []).filter(
(layer: any) => !layer.id?.startsWith("vigo_traffic")
);
delete style.sources?.vigo_traffic;
}
return style as StyleSpecification;
}
const stylePath = `/maps/styles/${styleName}-${colorScheme}.json`;
const resp = await fetch(stylePath);
if (!resp.ok) {
throw new Error(`Failed to load style: ${stylePath}`);
}
const style = await resp.json();
// Remove traffic layers if not requested
if (!includeTraffic) {
style.layers = (style.layers || []).filter(
(layer: any) => !layer.id?.startsWith("vigo_traffic")
);
delete style.sources?.vigo_traffic;
}
const baseUrl = window.location.origin;
const spritePath = style.sprite;
// Handle both string and array cases for spritePath
if (Array.isArray(spritePath)) {
// For array format, update each sprite object's URL to be absolute
style.sprite = spritePath.map((spriteObj) => {
const isAbsoluteUrl =
spriteObj.url.startsWith("http://") ||
spriteObj.url.startsWith("https://");
if (isAbsoluteUrl) {
return spriteObj;
}
return {
...spriteObj,
url: `${baseUrl}${spriteObj.url}`,
};
});
} else if (typeof spritePath === "string") {
if (
!spritePath.startsWith("http://") &&
!spritePath.startsWith("https://")
) {
style.sprite = `${baseUrl}${spritePath}`;
}
}
// Detect on each source if it the 'tiles' URLs are relative and convert them to absolute URLs
for (const sourceKey in style.sources) {
const source = style.sources[sourceKey];
for (const tileKey in source.tiles) {
const tileUrl = source.tiles[tileKey];
const isAbsoluteUrl =
tileUrl.startsWith("http://") || tileUrl.startsWith("https://");
if (!isAbsoluteUrl) {
source.tiles[tileKey] = `${baseUrl}${tileUrl}`;
}
}
}
return style as StyleSpecification;
}
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