Initial open source release

app/api/group/[id]/route.ts

@@ -0,0 +1,82 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { todayStr } from '@/lib/range';
+import { db } from '@/lib/db';
+import { listMessagesForDate, getSyncState, listAllSyncedDates } from '@/lib/messages-store';
+import { wxSessions } from '@/lib/wx';
+
+export const dynamic = 'force-dynamic';
+
+interface DailyHistoryRow {
+  date: string;
+  total: number;
+}
+
+export async function GET(
+  req: NextRequest,
+  ctx: { params: Promise<{ id: string }> },
+) {
+  const { id } = await ctx.params;
+  const chatroomId = decodeURIComponent(id);
+  const url = new URL(req.url);
+  const date = url.searchParams.get('date') ?? todayStr();
+  const limit = Math.min(Number(url.searchParams.get('limit') ?? 1000), 5000);
+
+  // 拉群名（从 wx sessions）
+  let chatName = chatroomId;
+  try {
+    const sessions = await wxSessions(500);
+    const found = sessions.find((s) => s.username === chatroomId);
+    if (found) chatName = found.chat;
+  } catch {}
+
+  // 当日消息
+  const messages = listMessagesForDate(chatroomId, date, limit);
+
+  // 当日聚合统计
+  const total = messages.length;
+  const senderMap = new Map<string, number>();
+  const typeMap = new Map<string, number>();
+  const hours = new Array(24).fill(0) as number[];
+  for (const m of messages) {
+    senderMap.set(m.sender, (senderMap.get(m.sender) ?? 0) + 1);
+    typeMap.set(m.type, (typeMap.get(m.type) ?? 0) + 1);
+    if (m.timestamp) {
+      const h = new Date(m.timestamp * 1000).getHours();
+      if (h >= 0 && h < 24) hours[h]++;
+    }
+  }
+  const stats = {
+    chat: chatName,
+    total,
+    by_hour: hours.map((count, hour) => ({ hour, count })),
+    by_type: Array.from(typeMap.entries())
+      .map(([type, count]) => ({ type, count }))
+      .sort((a, b) => b.count - a.count),
+    top_senders: Array.from(senderMap.entries())
+      .map(([sender, count]) => ({ sender, count }))
+      .sort((a, b) => b.count - a.count)
+      .slice(0, 20),
+  };
+
+  // 历史日柱图
+  const dailyHistory = db()
+    .prepare(
+      'SELECT date, total FROM daily_stats WHERE chatroom_id = ? ORDER BY date ASC',
+    )
+    .all(chatroomId) as DailyHistoryRow[];
+
+  // 同步状态
+  const syncState = getSyncState(chatroomId);
+  const syncedDates = listAllSyncedDates(chatroomId);
+
+  return NextResponse.json({
+    ok: true,
+    chatroom_id: chatroomId,
+    date,
+    stats,
+    recent: messages,
+    daily_history: dailyHistory,
+    sync_state: syncState ?? null,
+    synced_dates: syncedDates,
+  });
+}