refactor: move rename and delete sessions to modules

server/modules/providers/services/sessions.service.ts

@@ -1,3 +1,6 @@
+import fsp from 'node:fs/promises';
+
+import { sessionsDb } from '@/modules/database/index.js';
 import { providerRegistry } from '@/modules/providers/provider.registry.js';
 import type {
   FetchHistoryOptions,
@@ -5,6 +8,24 @@ import type {
   LLMProvider,
   NormalizedMessage,
 } from '@/shared/types.js';
+import { AppError } from '@/shared/utils.js';
+
+
+/**
+ * Removes one file if it exists.
+ */
+async function removeFileIfExists(filePath: string): Promise<boolean> {
+  try {
+    await fsp.unlink(filePath);
+    return true;
+  } catch (error) {
+    const code = (error as NodeJS.ErrnoException).code;
+    if (code === 'ENOENT') {
+      return false;
+    }
+    throw error;
+  }
+}
 
 /**
  * Application service for provider-backed session message operations.
@@ -42,4 +63,35 @@ export const sessionsService = {
   ): Promise<FetchHistoryResult> {
     return providerRegistry.resolveProvider(providerName).sessions.fetchHistory(sessionId, options);
   },
+
+  /**
+   * Deletes one persisted session row by id.
+   */
+  deleteSessionById(sessionId: string): { sessionId: string } {
+    const deleted = sessionsDb.deleteSessionById(sessionId);
+    if (!deleted) {
+      throw new AppError(`Session "${sessionId}" was not found.`, {
+        code: 'SESSION_NOT_FOUND',
+        statusCode: 404,
+      });
+    }
+
+    return { sessionId };
+  },
+
+  /**
+   * Renames one session by id without requiring the caller to pass provider.
+   */
+  renameSessionById(sessionId: string, summary: string): { sessionId: string; summary: string } {
+    const session = sessionsDb.getSessionById(sessionId);
+    if (!session) {
+      throw new AppError(`Session "${sessionId}" was not found.`, {
+        code: 'SESSION_NOT_FOUND',
+        statusCode: 404,
+      });
+    }
+
+    sessionsDb.updateSessionCustomName(sessionId, summary);
+    return { sessionId, summary };
+  },
 };