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debug(map-explorer): diagnostic logging for blank tile investigation #170

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slaveofcode merged 2 commits into from
Aug 8, 2026
Merged

debug(map-explorer): diagnostic logging for blank tile investigation #170

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5e5fa80
Merge pull request #169 from slaveofcode/develop
slaveofcode Aug 8, 2026
a084cad
debug(map-explorer): add diagnostic console logging for tile loading
Aug 8, 2026
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22 changes: 19 additions & 3 deletions src/islands/maps/MapExplorer.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -18,32 +18,44 @@ import type { Lang } from '@/i18n/config';
async function fetchResolvedStyle(url: string): Promise<string | Record<string, any>> {
try {
const res = await fetch(url, { cache: 'no-cache' });
console.log('[map] style fetch', url, res.status, res.ok);
if (!res.ok) return url;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const style = await res.json() as { version?: number; sources?: Record<string, any> };
// Validate: must look like a MapLibre style (has version + sources)
if (!style.version || !style.sources) return url;
if (!style.version || !style.sources) {
console.warn('[map] style response invalid (no version/sources):', JSON.stringify(style).slice(0, 200));
return url;
}
await Promise.all(
Object.values(style.sources).map(async (src) => {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const s = src as Record<string, any>;
if (s.type === 'vector' && typeof s.url === 'string' && !s.tiles) {
try {
console.log('[map] fetching TileJSON', s.url);
const tj = await fetch(s.url, { cache: 'no-cache' }).then(r => r.json()) as {
tiles?: string[]; minzoom?: number; maxzoom?: number;
};
console.log('[map] TileJSON tiles[0]:', tj.tiles?.[0], 'maxzoom:', tj.maxzoom);
if (tj.tiles?.length) {
s.tiles = tj.tiles;
if (tj.minzoom != null) s.minzoom = tj.minzoom;
if (tj.maxzoom != null) s.maxzoom = tj.maxzoom;
delete s.url;
}
} catch { /* keep url-based source as fallback */ }
} catch (e) {
console.error('[map] TileJSON fetch failed:', e);
}
}
})
);
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const omt = (style.sources as Record<string, any>)?.openmaptiles;
console.log('[map] openmaptiles source after resolve:', omt?.tiles?.[0] ?? '(still url-based: ' + omt?.url + ')');
return style;
} catch {
} catch (e) {
console.error('[map] fetchResolvedStyle failed:', e);
return url;
}
}
Expand Down Expand Up @@ -182,6 +194,10 @@ export default function MapExplorer({ lang = 'en' }: { lang?: Lang }) {
map.on('click', e => handleClick(e.lngLat.lat, e.lngLat.lng));
map.on('style.load', () => { ensureMeasureLayer(); refreshMeasureLine(); });
map.on('load', () => map.resize());
// eslint-disable-next-line @typescript-eslint/no-explicit-any
map.on('error', (e: any) => console.error('[map] error:', e?.error?.message ?? e));
map.on('sourcedataloading', (e) => console.log('[map] source loading:', e.sourceId));
map.on('sourcedata', (e) => { if (e.isSourceLoaded) console.log('[map] source loaded:', e.sourceId); });
// Force a repaint after each move so MapLibre re-evaluates missing tiles.
// We do NOT call resize() here — the canvas size doesn't change on pan/zoom,
// and calling resize() synchronously in moveend triggers constrainInternal
Expand Down
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