Fix multi-month scrape coverage and add duo MUSIC EXCHANGE

- Extend 8 scrapers (liquid-room, shibuya-o, club-quattro, meets-otsuka,
  nishieifuku-jam, fever-shindaita, fad-yokohama, and new duo-music-exchange)
  to fetch 3 calendar months instead of 1-2, covering the full 65-day window
- Add duo MUSIC EXCHANGE scraper (渋谷, ~700 cap, /schedule/YYYY/index_YYYY-MM.html)
- Add npm test: Node.js built-in test runner verifies each scraper fetches
  all required month URLs via mocked fetch (10 tests, no extra deps)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 103 insertions, 0 deletions

diff --git a/app/scrapers/duo-music-exchange.ts b/app/scrapers/duo-music-exchange.ts
new file mode 100644
index 0000000..57814ea
--- /dev/null
+++ b/app/scrapers/duo-music-exchange.ts
@@ -0,0 +1,103 @@
+/**
+ * duo MUSIC EXCHANGE — https://duomusicexchange.com
+ *
+ * 月別HTML: /schedule/YYYY/index_YYYY-MM.html
+ * DOM構造:
+ *   <section id="daybox">
+ *     <div class="date"><span class="day">01</span></div>
+ *     <div class="sche-details">
+ *       <span class="artist">アーティスト名</span>
+ *       <span class="details-title">イベントタイトル</span>
+ *       <dl class="row">
+ *         <dt>OPEN/START</dt><dd>18:00 / 19:00</dd>
+ *         <dt>ADV./DOOR</dt><dd>¥3,000 / ¥3,500</dd>
+ *         <dt>Ticket.</dt><dd><a href="...">...</a></dd>
+ *       </dl>
+ *     </div>
+ *   </section>
+ */
+import * as cheerio from "cheerio";
+import type { Scraper, VenueMeta } from "./base";
+import type { EventInput } from "~/lib/db.server";
+
+export const venue: VenueMeta = {
+  id: "duo-music-exchange",
+  name: "duo MUSIC EXCHANGE",
+  url: "https://duomusicexchange.com",
+  area: "渋谷",
+  capacity: 700,
+};
+
+async function scrapeMonth(year: number, month: number): Promise<EventInput[]> {
+  const mm = String(month).padStart(2, "0");
+  const url = `${venue.url}/schedule/${year}/index_${year}-${mm}.html`;
+  const res = await fetch(url);
+  if (!res.ok) return [];
+  const $ = cheerio.load(await res.text());
+  const events: EventInput[] = [];
+
+  $("section#daybox").each((_, el) => {
+    const $el = $(el);
+
+    const dayStr = $el.find(".date .day").first().text().trim();
+    const day = parseInt(dayStr, 10);
+    if (!day) return;
+    const date = `${year}-${mm}-${String(day).padStart(2, "0")}`;
+
+    const artist = $el.find(".sche-details .artist").first().text().trim() || null;
+    const title = $el.find(".sche-details .details-title").first().text().trim();
+    if (!title) return;
+
+    let openTime: string | null = null;
+    let startTime: string | null = null;
+    let price: string | null = null;
+    let ticketUrl: string | null = null;
+
+    $el.find("dl.row dt").each((_, dt) => {
+      const label = $(dt).text().trim();
+      const $dd = $(dt).next("dd");
+      if (/OPEN/i.test(label)) {
+        const times = $dd.text().trim().match(/(\d{1,2}:\d{2})/g) ?? [];
+        openTime = times[0] ?? null;
+        startTime = times[1] ?? null;
+      } else if (/ADV/i.test(label)) {
+        price = $dd.text().trim() || null;
+      } else if (/Ticket/i.test(label)) {
+        ticketUrl = $dd.find("a[href]").first().attr("href") ?? null;
+      }
+    });
+
+    const imgSrc = $el.find("img").first().attr("src") ?? null;
+    const imageUrl = imgSrc
+      ? (imgSrc.startsWith("http") ? imgSrc : `${venue.url}/schedule/${year}/${imgSrc}`)
+      : null;
+
+    events.push({
+      venue_id: venue.id,
+      title,
+      artist,
+      date,
+      open_time: openTime,
+      start_time: startTime,
+      price,
+      ticket_url: ticketUrl,
+      image_url: imageUrl,
+      source_url: url,
+    });
+  });
+
+  return events;
+}
+
+export const scraper: Scraper = {
+  venue,
+  async scrape(): Promise<EventInput[]> {
+    const now = new Date();
+    const months = [0, 1, 2].map((offset) => {
+      const d = new Date(now.getFullYear(), now.getMonth() + offset, 1);
+      return { year: d.getFullYear(), month: d.getMonth() + 1 };
+    });
+    const results = await Promise.all(months.map(({ year, month }) => scrapeMonth(year, month)));
+    return results.flat();
+  },
+};