Implement tiled multiplayer city simulation and scaling stages

tools/generate-worker.ts

@@ -0,0 +1,27 @@
+import { readFile, mkdir, rename, rm, writeFile } from 'node:fs/promises';
+import { fetchOverpass, type BBox } from '../src/osm/overpass';
+import { generateWorldSync } from '../src/gen/generate';
+import { exportCity } from './export/index';
+const job = JSON.parse(await readFile(process.argv[2], 'utf8')) as {
+  bbox: BBox; name: string; seed: number; cityId: string; output: string; maxBuildings: number; progress: string; input?:string;
+};
+const progress = async (stage: string) => writeFile(job.progress,JSON.stringify({stage}));
+await progress('Загрузка OSM');
+const elements = job.input ? JSON.parse(await readFile(job.input,'utf8')).elements : await fetchOverpass(job.bbox);
+if (elements.filter(e => e.tags?.building && e.tags.building !== 'no').length > job.maxBuildings) throw new Error('Превышен лимит зданий');
+await progress('Генерация');
+const world = generateWorldSync(elements,job.bbox,job.name,job.seed);
+if (world.buildings.length > job.maxBuildings) throw new Error('Превышен лимит зданий');
+world.id = job.cityId;
+await progress('Экспорт');
+const temporary = `${job.output}.pending`;
+try {
+  // A timed-out worker may leave its unpublished staging directory behind.
+  await rm(temporary,{recursive:true,force:true});
+  await mkdir(temporary,{recursive:true});
+  await exportCity(world,temporary);
+  await rename(temporary,job.output);
+} catch (error) {
+  await rm(temporary,{recursive:true,force:true}); throw error;
+}
+await progress('Готово');