Here are the step-by-step instructions that would lead directly to the correct, clean implementation:

• Endpoint: GET /views/glimpse/:id
• Authentication: Required (existing Google OAuth)
• Input: Notion page ID (not database ID)
• Output: JSON response with full service response (minus UI elements)
• Data source: Notion page properties

cat /backend/services/notion.service.ts

cat /backend/routes/views/\_views.routes.ts

cat /main.tsx # Look for auth middleware setup

• Current service has getDatabaseById() for database metadata
• Need getPageById() for individual page data
• Service should return full Notion response for flexibility

// Add to /backend/services/notion.service.ts
export async function getPageById(pageId: string) {
  try {
    const response = await notion.pages.retrieve({
      page_id: pageId,
    });
    return {
      success: true,
      data: response,
      timestamp: new Date().toISOString(),
    };
  } catch (error) {
    return {
      success: false,
      error: error.message,
      timestamp: new Date().toISOString(),
    };
  }
}

// Create /backend/controllers/glimpse.controller.ts
import { Context } from "npm:hono@3.12.12";
import { getPageById } from "../services/notion.service.ts";

export async function glimpseHandler(c: Context) {
const id = c.req.param("id");

if (!id) {
  return c.json({ error: "Demo ID is required" }, 400);
}

const result = await getPageById(id);

if (!result.success) {
  return c.json({ error: "Failed to fetch demo data", details: result.error }, 500);
}

// Filter out button properties from the response
if (result.data?.properties) {
  const filteredProperties = Object.fromEntries(
  Object.entries(result.data.properties).filter(([key, value]) => value?.type !== "button")
);

    result.data.properties = filteredProperties;

  }

  return c.json(result);
}

// Update /backend/routes/views/\_views.routes.ts
import { Hono } from "npm:hono@3.12.12";
import { glimpseHandler } from "../../controllers/glimpse.controller.ts";

const app = new Hono();

app.get("/glimpse/:id", glimpseHandler);

export default app;

Add to /backend/routes/views/README.md

• Purpose: Returns Notion page data as JSON (filtered for data consumption)
• Authentication: Required (Google OAuth)
• Parameters: id - Notion page ID
• Response: Service response object with Notion page data (button properties removed)
• Filtering: Removes UI-specific properties (type: "button") for cleaner data consumption

✅ Controller Best Practices:

• Single Responsibility: Controller handles HTTP concerns + minimal data cleanup
• Thin Layer: Minimal processing, focused on improving data consumption
• Useful Filtering: Remove UI elements that don't belong in data APIs
• Consistent Error Handling: Standard error response format

✅ Service Layer:

• Data Access: Handle all Notion API interactions
• Consistent Response Format: Always return {success, data/error, timestamp}
• Raw Data: Return unfiltered data from external APIs

✅ Separation of Concerns:

• Controller: HTTP validation, routing, error responses, basic data cleanup
• Service: External API calls, data retrieval
• Client: Complex data processing, extraction, formatting

{ "success": true, "data": { "object": "page", "id": "notion-page-id", "properties": { "Name": { "type": "title", "title": [{"plain_text": "Demo Name"}] }, "Status": { "type": "select", "select": {"name": "Active"} } // Button properties filtered out } }, "timestamp": "2025-07-15T17:25:00.000Z" }

✅ Correct Approach:

• Data Source: Use notion.pages.retrieve() for page data
• Controller Logic: Keep minimal but include useful data cleanup
• Property Filtering: Remove UI-specific elements (buttons) that don't belong in data APIs
• Error Handling: Consistent service response pattern

✅ Appropriate Controller Processing:

• UI Element Removal: Filter out button properties (not data)
• Security Cleanup: Remove potentially sensitive UI configurations
• Performance: Reduce payload size by removing unnecessary properties

❌ Avoid These Mistakes:

• Over-processing: Don't extract/transform business data in controller
• Tight Coupling: Don't assume specific property names or structures
• Inconsistent Responses: Don't create custom response formats
• Mixed Responsibilities: Don't mix HTTP handling with complex business logic

Test authentication (should show login page)

curl /views/glimpse/test-id

Test with valid Notion page ID (after auth)

curl -H "Cookie: auth-cookie" /views/glimpse/actual-notion-page-id

Verify button properties are filtered out

Response should not contain any properties with "type": "button"

• Clean Data: Removes UI clutter from data API responses
• Maintainable: Clear separation between layers with focused responsibilities
• Flexible: Client can still extract any business data from Notion response
• Consistent: Follows existing service response patterns
• Secure: Prevents exposure of UI configurations
• Performance: Smaller payloads without unnecessary UI properties
• Future-proof: Easy to extend filtering logic for other UI property types

✅ Good reasons to process in controller:

• Remove UI-specific elements (buttons, formulas for display)
• Filter sensitive configuration data
• Remove properties that are never useful for data consumption
• Basic security/privacy filtering

❌ Avoid processing in controller:

• Complex business logic transformations
• Data extraction that depends on specific use cases
• Heavy computational processing
• Application-specific data formatting
• This approach creates a clean, maintainable endpoint that provides useful data filtering while maintaining architectural best practices and keeping the controller focused on its core responsibilities.