V0.1

server/lib/ticket-events-merge.js

@@ -0,0 +1,86 @@
+import { mapEvent } from './mappers.js';
+
+/**
+ * Mehrere ATTACHMENT-DB-Zeilen pro Kalendertag (lokal) zu einem Listeneintrag zusammenführen.
+ * @param {Array<Record<string, unknown>>} rows – SELECT * FROM events (bereits sortiert)
+ * @param {Map<string, Array<Record<string, unknown>>>} byEvent – event_id → ticket_attachments-Zeilen
+ * @param {{ prepare: (sql: string) => { get: (a: unknown) => { d?: string } | undefined } }} db
+ */
+export function mergeAttachmentEventsForApi(rows, byEvent, db) {
+  const dayKeyStmt = db.prepare(`SELECT date(?, 'localtime') AS d`);
+
+  const nonAtt = [];
+  /** @type {Map<string, Array<Record<string, unknown>>>} */
+  const attByDay = new Map();
+
+  for (const r of rows) {
+    if (r.type !== 'ATTACHMENT') {
+      nonAtt.push(r);
+      continue;
+    }
+    const dk = dayKeyStmt.get(r.created_at)?.d;
+    const key = dk || String(r.created_at || '').slice(0, 10);
+    if (!attByDay.has(key)) attByDay.set(key, []);
+    attByDay.get(key).push(r);
+  }
+
+  /** @type {Array<{ row: Record<string, unknown>; attachments: Array<Record<string, unknown>> }>} */
+  const mergedChunks = [];
+
+  for (const [, group] of attByDay) {
+    group.sort((a, b) =>
+      String(a.created_at).localeCompare(String(b.created_at)),
+    );
+    const maxCreated = group.reduce((best, x) =>
+      String(x.created_at) > String(best) ? x.created_at : best,
+      group[0].created_at,
+    );
+    const descs = [
+      ...new Set(
+        group
+          .map((g) => String(g.description || '').trim())
+          .filter(Boolean),
+      ),
+    ];
+    const mergedRow = {
+      ...group[0],
+      id: group[0].id,
+      created_at: maxCreated,
+      description: descs.join('\n\n'),
+    };
+
+    const allAtt = [];
+    for (const ev of group) {
+      const list = byEvent.get(ev.id);
+      if (list) allAtt.push(...list);
+    }
+    allAtt.sort((a, b) =>
+      String(a.created_at).localeCompare(String(b.created_at)),
+    );
+
+    mergedChunks.push({ row: mergedRow, attachments: allAtt });
+  }
+
+  mergedChunks.sort((a, b) =>
+    String(b.row.created_at).localeCompare(String(a.row.created_at)),
+  );
+
+  nonAtt.sort((a, b) =>
+    String(b.created_at).localeCompare(String(a.created_at)),
+  );
+
+  const out = [
+    ...nonAtt,
+    ...mergedChunks.map((c) => c.row),
+  ];
+
+  const mergedByEventId = new Map(
+    mergedChunks.map((c) => [c.row.id, c.attachments]),
+  );
+
+  return out.map((r) =>
+    r.type === 'ATTACHMENT'
+      ? mapEvent(r, mergedByEventId.get(r.id) || [])
+      : mapEvent(r, []),
+  );
+}