first commit

src/modules/storage/sessions.ts

@@ -0,0 +1,71 @@
+import type { ChatMessage } from "../llm/types";
+
+function sessionDir(): string {
+  const profile = (Zotero as any).Profile?.dir || (Zotero as any).getProfileDirectory?.()?.path;
+  if (!profile) {
+    throw new Error("Cannot resolve Zotero profile directory");
+  }
+  return PathUtils.join(profile, "chatpapers", "sessions");
+}
+
+function sessionPath(itemKey: string, attachmentKey: string): string {
+  const safe = `${itemKey}-${attachmentKey || "none"}`.replace(
+    /[^a-zA-Z0-9_-]/g,
+    "_",
+  );
+  return PathUtils.join(sessionDir(), `${safe}.json`);
+}
+
+export async function loadSession(
+  itemKey: string,
+  attachmentKey: string,
+): Promise<ChatMessage[]> {
+  try {
+    const path = sessionPath(itemKey, attachmentKey);
+    const exists = await IOUtils.exists(path);
+    if (!exists) return [];
+    const raw = await IOUtils.readUTF8(path);
+    const data = JSON.parse(raw) as { messages?: ChatMessage[] };
+    return (data.messages || []).filter((m) => m.role !== "system");
+  } catch (e) {
+    ztoolkit.log("loadSession failed", e);
+    return [];
+  }
+}
+
+export async function saveSession(
+  itemKey: string,
+  attachmentKey: string,
+  messages: ChatMessage[],
+): Promise<void> {
+  try {
+    const dir = sessionDir();
+    await IOUtils.makeDirectory(dir, { createAncestors: true, ignoreExisting: true });
+    const path = sessionPath(itemKey, attachmentKey);
+    const payload = JSON.stringify(
+      {
+        updatedAt: Date.now(),
+        messages: messages.filter((m) => m.role !== "system").slice(-50),
+      },
+      null,
+      2,
+    );
+    await IOUtils.writeUTF8(path, payload);
+  } catch (e) {
+    ztoolkit.log("saveSession failed", e);
+  }
+}
+
+export async function clearSession(
+  itemKey: string,
+  attachmentKey: string,
+): Promise<void> {
+  try {
+    const path = sessionPath(itemKey, attachmentKey);
+    if (await IOUtils.exists(path)) {
+      await IOUtils.remove(path);
+    }
+  } catch (e) {
+    ztoolkit.log("clearSession failed", e);
+  }
+}