Refactor code for extensability

Refactor code for extensability

src/tools/insightTools.ts

@@ -0,0 +1,64 @@
+import { dbAll, dbExec, dbRun } from '../db/index.js';
+import { formatSuccessResponse } from '../utils/formatUtils.js';
+
+/**
+ * Add a business insight to the memo
+ * @param insight Business insight text
+ * @returns Result of the operation
+ */
+export async function appendInsight(insight: string) {
+  try {
+    if (!insight) {
+      throw new Error("Insight text is required");
+    }
+
+    // Create insights table if it doesn't exist
+    await dbExec(`
+      CREATE TABLE IF NOT EXISTS mcp_insights (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        insight TEXT NOT NULL,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+      )
+    `);
+    
+    // Insert the insight
+    await dbRun(
+      "INSERT INTO mcp_insights (insight) VALUES (?)",
+      [insight]
+    );
+    
+    return formatSuccessResponse({ success: true, message: "Insight added" });
+  } catch (error: any) {
+    throw new Error(`Error adding insight: ${error.message}`);
+  }
+}
+
+/**
+ * List all insights in the memo
+ * @returns Array of insights
+ */
+export async function listInsights() {
+  try {
+    // Check if insights table exists
+    const tableExists = await dbAll(
+      "SELECT name FROM sqlite_master WHERE type='table' AND name = 'mcp_insights'"
+    );
+    
+    if (tableExists.length === 0) {
+      // Create table if it doesn't exist
+      await dbExec(`
+        CREATE TABLE IF NOT EXISTS mcp_insights (
+          id INTEGER PRIMARY KEY AUTOINCREMENT,
+          insight TEXT NOT NULL,
+          created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )
+      `);
+      return formatSuccessResponse([]);
+    }
+    
+    const insights = await dbAll("SELECT * FROM mcp_insights ORDER BY created_at DESC");
+    return formatSuccessResponse(insights);
+  } catch (error: any) {
+    throw new Error(`Error listing insights: ${error.message}`);
+  }
+}