endfield-mcp/dist/data/storySearch.js

MCP Server for Arknights: Endfield (TypeScript / stdio + Streamable HTTP)

/**
 * Story full-text search.
 *
 * Uses the pre-built `search.json` index (concatenated text per scene) to
 * answer regex queries across all 9271 dialogue scenes without loading
 * each conv file. Returns matching entries with the conv key and a
 * snippet around the match.
 *
 * Depends on `./storyCore.js` for the store accessor and catalog entries.
 */
import { store, entries } from "./storyCore.js";
// ---------------------------------------------------------------------------
// Search caches (private to this module)
// ---------------------------------------------------------------------------
let _searchIndex = null;
let _entryMap = null;
/** Reset the search caches. Called by the barrel orchestrator. */
export function clearSearchCache() {
    _searchIndex = null;
    _entryMap = null;
}
function searchIndex() {
    if (_searchIndex !== null)
        return _searchIndex;
    try {
        const raw = store().readJson("search.json");
        _searchIndex = raw.entries ?? [];
    }
    catch {
        // search.json is optional — if missing, search returns empty.
        _searchIndex = [];
    }
    return _searchIndex;
}
// ---------------------------------------------------------------------------
// Public API
// ---------------------------------------------------------------------------
/**
 * Full-text search across all dialogue scenes.
 *
 * Uses the pre-built search.json index (concatenated text per scene).
 * Returns matching entries with the conv key and a snippet around the
 * match.
 */
export function searchStories(pattern, maxResults = 30) {
    let re;
    try {
        re = new RegExp(pattern, "i");
    }
    catch {
        const literal = pattern.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
        re = new RegExp(literal, "i");
    }
    const idx = searchIndex();
    // Build key→entry lookup lazily and cache it (9271 entries — pointless
    // to rebuild on every search call since the catalog only changes on
    // sync, which clears this cache via clearStoryCaches).
    if (_entryMap === null) {
        _entryMap = new Map();
        for (const e of entries())
            _entryMap.set(e.key, e);
    }
    const entryMap = _entryMap;
    const out = [];
    for (const se of idx) {
        if (re.test(se.x)) {
            const entry = entryMap.get(se.k);
            if (entry) {
                // Extract a snippet around the first match.
                const matchIdx = se.x.search(re);
                const start = Math.max(0, matchIdx - 30);
                const end = Math.min(se.x.length, matchIdx + 80);
                const snippet = (start > 0 ? "..." : "") +
                    se.x.slice(start, end).replace(/\s+/g, " ").trim() +
                    (end < se.x.length ? "..." : "");
                out.push({ key: se.k, snippet, entry });
                if (out.length >= maxResults)
                    break;
            }
        }
    }
    return out;
}
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