Дмитрий
25 lines
910 B
JavaScript
25 lines
910 B
JavaScript
import { readFileSync } from 'node:fs';
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import { fileURLToPath } from 'node:url';
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import { dirname, join } from 'node:path';
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const __dirname = dirname(fileURLToPath(import.meta.url));
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const DEFAULT_MAP_PATH = join(__dirname, 'observer-chain-map.json');
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/** Load the node->chains map. Throws on missing/invalid JSON (caller handles). */
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export function loadChainMap(path = DEFAULT_MAP_PATH) {
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const raw = JSON.parse(readFileSync(path, 'utf8'));
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const map = new Map();
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for (const [node, chains] of Object.entries(raw)) {
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if (node === '_note') continue;
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if (Array.isArray(chains) && chains.length > 0) map.set(node, chains);
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}
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return map;
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}
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/** node_chosen -> array of L-chains, or null if not in any chain. */
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export function chainsFor(node, map) {
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if (!node || typeof node !== 'string') return null;
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const chains = map.get(node);
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return chains && chains.length > 0 ? chains : null;
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}
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