Replace leaflet for maplibre, use react-router in framework mode

1 files changed, 49 insertions, 0 deletions

diff --git a/src/frontend/app/maps/styleloader.ts b/src/frontend/app/maps/styleloader.ts
new file mode 100644
index 0000000..f00aacc
--- /dev/null
+++ b/src/frontend/app/maps/styleloader.ts
@@ -0,0 +1,49 @@
+import type { StyleSpecification } from "react-map-gl/maplibre";
+
+export async function loadStyle(styleName: string, colorScheme: string): Promise<StyleSpecification> {
+    const stylePath = `/maps/styles/${styleName}-${colorScheme}.json`;
+    const resp = await fetch(stylePath);
+
+    if (!resp.ok) {
+        throw new Error(`Failed to load style: ${stylePath}`);
+    }
+
+    const style = await resp.json();
+
+    const baseUrl = window.location.origin;
+    const spritePath = style.sprite;
+
+    // Handle both string and array cases for spritePath
+    if (Array.isArray(spritePath)) {
+        // For array format, update each sprite object's URL to be absolute
+        style.sprite = spritePath.map(spriteObj => {
+            const isAbsoluteUrl = spriteObj.url.startsWith("http://") || spriteObj.url.startsWith("https://");
+            if (isAbsoluteUrl) {
+                return spriteObj;
+            }
+
+            return {
+                ...spriteObj,
+                url: `${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;
+}