indexer.mjs•3.81 kB
// indexer.mjs — manual.json を読み込み、簡易インデックス/検索/補完を提供
import fs from "node:fs";
function safeLower(s) {
return (s ?? "").toString().normalize("NFKC").toLowerCase();
}
function mapKind(prefix) {
const m = {
an: "annotation",
const: "const",
fun: "function",
func: "function",
fn: "function",
type: "type",
var: "variable",
dir: "directive",
};
return m[prefix] ?? prefix ?? "unknown";
}
function deriveCategory(id, kind) {
// 例: const_color.red → color
if (kind === "const" && id?.startsWith("const_")) {
const rest = id.slice("const_".length);
const dot = rest.indexOf(".");
if (dot > 0) {
const beforeDot = rest.slice(0, dot);
const underPos = beforeDot.indexOf("_");
if (underPos > -1) return beforeDot.slice(0, underPos);
return beforeDot;
}
}
// 例: an_@function → @function（annotation の場合はそのまま）
if (kind === "annotation" && id?.startsWith("an_")) {
return id.slice(3);
}
return null;
}
export function loadManual(path) {
const raw = fs.readFileSync(path, { encoding: "utf8" });
const data = JSON.parse(raw);
return data;
}
export function normalizeEntries(data) {
const entries = [];
const baseUrl = data?.source_url ?? null;
const toc = Array.isArray(data?.toc) ? data.toc : [];
for (const item of toc) {
const kind = mapKind(item?.category_prefix);
const entry = {
id: item?.id ?? "",
title: item?.title ?? "",
kind,
category: deriveCategory(item?.id, kind),
// 詳細本文は不明なので後で拡張。最低限の URL を推定
source_url: baseUrl ? `${baseUrl}#${encodeURIComponent(item?.id ?? "")}` : null,
// 以下は未解決（manual.json に詳細がない場合がある）
signatures: [],
description: null,
args: [],
returns: null,
examples: [],
};
entries.push(entry);
}
return entries;
}
export function buildIndex(entries) {
// 前方一致/部分一致の簡易スコアリング
const index = entries.map((e) => ({
...e,
_ltitle: safeLower(e.title),
_lid: safeLower(e.id),
}));
function matchScore(item, q) {
const t = item._ltitle;
const i = item._lid;
if (t.startsWith(q)) return 100;
if (i.startsWith(q)) return 95;
if (t.includes(q)) return 60;
if (i.includes(q)) return 55;
return 0;
}
return {
entries,
search({ query, kind, limit = 20 }) {
const q = safeLower(query);
const res = [];
for (const item of index) {
if (kind && item.kind !== kind) continue;
const s = matchScore(item, q);
if (s > 0) res.push({ item, score: s });
}
res.sort((a, b) => b.score - a.score || a.item.title.localeCompare(b.item.title));
return res.slice(0, limit).map(({ item, score }) => ({
id: item.id,
title: item.title,
kind: item.kind,
score,
}));
},
complete({ prefix, kind, limit = 20 }) {
const q = safeLower(prefix);
const res = [];
for (const item of index) {
if (kind && item.kind !== kind) continue;
if (item._ltitle.startsWith(q) || item._lid.startsWith(q)) {
res.push(item);
}
}
res.sort((a, b) => a.title.localeCompare(b.title));
return res.slice(0, limit).map((item) => ({ id: item.id, title: item.title, kind: item.kind }));
},
getById(id) {
return entries.find((e) => e.id === id) || null;
},
listKinds() {
const counts = new Map();
for (const e of entries) {
counts.set(e.kind, (counts.get(e.kind) ?? 0) + 1);
}
return Array.from(counts.entries()).map(([kind, count]) => ({ kind, count }));
},
};
}