CodeForPhilly
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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+- **Conditional PDF Access Based on Authentication** (2025-01-XX)
+  - Logged-in users see "View PDF" button that opens PDF viewer in new tab
+  - Non-logged-in users see "Download PDF" button that directly downloads the file
+  - Backend: Added `upload_file_guid` field to risk/source API responses
+  - Frontend: Conditional rendering based on Redux authentication state
+  - Fallback GUID extraction from URL if backend field is missing
+
+  **Backend Changes:**
+
+  *File: `server/api/views/risk/views_riskWithSources.py`*
+  ```python
+  # Added to source_info dictionary in 3 locations (lines ~138, ~252, ~359):
+  source_info = {
+      'filename': filename,
+      'title': getattr(embedding, 'title', None),
+      'publication': getattr(embedding, 'publication', ''),
+      'text': getattr(embedding, 'text', ''),
+      'rule_type': medrule.rule_type,
+      'history_type': medrule.history_type,
+      'upload_fileid': getattr(embedding, 'upload_file_id', None),
+      'page': getattr(embedding, 'page_num', None),
+      'link_url': self._build_pdf_link(embedding),
+      'upload_file_guid': str(embedding.upload_file.guid) if embedding.upload_file else None  # NEW
+  }
+  ```
+
+  **Frontend Changes:**
+
+  *File: `frontend/src/pages/PatientManager/PatientManager.tsx`*
+  ```typescript
+  // Added imports:
+  import { useSelector } from "react-redux";
+  import { RootState } from "../../services/actions/types";
+
+  // Added hook to get auth state:
+  const { isAuthenticated } = useSelector((state: RootState) => state.auth);
+
+  // Passed to PatientSummary:
+  <PatientSummary
+    // ... existing props
+    isAuthenticated={isAuthenticated}
+  />
+  ```
+
+  *File: `frontend/src/pages/PatientManager/PatientSummary.tsx`*
+  ```typescript
+  // Updated interface:
+  interface PatientSummaryProps {
+    // ... existing props
+    isAuthenticated?: boolean;  // NEW
+  }
+
+  // Updated SourceItem type:
+  type SourceItem = {
+    // ... existing fields
+    upload_file_guid?: string | null;  // NEW
+  };
+
+  // Added helper function:
+  const extractGuidFromUrl = (url: string): string | null => {
+    try {
+      const urlObj = new URL(url, window.location.origin);
+      return urlObj.searchParams.get('guid');
+    } catch {
+      return null;
+    }
+  };
+
+  // Updated component:
+  const PatientSummary = ({
+    // ... existing props
+    isAuthenticated = false,  // NEW
+  }: PatientSummaryProps) => {
+    const baseURL = import.meta.env.VITE_API_BASE_URL || '';  // NEW
+
+  // Updated MedicationItem props:
+  const MedicationItem = ({
+    // ... existing props
+    isAuthenticated,  // NEW
+    baseURL,  // NEW
+  }: {
+    // ... existing types
+    isAuthenticated: boolean;  // NEW
+    baseURL: string;  // NEW
+  }) => {
+
+  // Updated MedicationTier props:
+  const MedicationTier = ({
+    // ... existing props
+    isAuthenticated,  // NEW
+    baseURL,  // NEW
+  }: {
+    // ... existing types
+    isAuthenticated: boolean;  // NEW
+    baseURL: string;  // NEW
+  }) => (
+    // ... passes to MedicationItem
+    <MedicationItem
+      // ... existing props
+      isAuthenticated={isAuthenticated}
+      baseURL={baseURL}
+    />
+  );
+
+  // Conditional button rendering:
+  {s.link_url && (() => {
+    const guid = s.upload_file_guid || extractGuidFromUrl(s.link_url);
+    if (!guid) return null;
+
+    return isAuthenticated ? (
+      <a
+        href={s.link_url}
+        target="_blank"
+        rel="noopener noreferrer"
+        className="ml-2 px-2 py-1 text-xs bg-blue-100 text-blue-700 rounded hover:bg-blue-200 transition-colors"
+      >
+        View PDF
+      </a>
+    ) : (
+      <a
+        href={`${baseURL}/v1/api/uploadFile/${guid}`}
+        download
+        className="ml-2 px-2 py-1 text-xs bg-green-100 text-green-700 rounded hover:bg-green-200 transition-colors"
+      >
+        Download PDF
+      </a>
+    );
+  })()}
+
+  // Updated all MedicationTier calls to pass new props:
+  <MedicationTier
+    // ... existing props
+    isAuthenticated={isAuthenticated}
+    baseURL={baseURL}
+  />
+  ```
+
+### Fixed
+- **URL Route Case Consistency** (2025-01-XX)
+  - Fixed case mismatch between backend URL generation (`/drugsummary`) and frontend route (`/drugSummary`)
+  - Updated all references to use consistent camelCase `/drugSummary` route
+  - Affected files: `views_riskWithSources.py`, `Layout_V2_Sidebar.tsx`, `Layout_V2_Header.tsx`, `FileRow.tsx`
+
+- **Protected Route Authentication Flow** (2025-01-XX)
+  - Fixed blank page issue when opening protected routes in new tab
+  - `ProtectedRoute` now waits for authentication check to complete before redirecting
+  - Added `useAuth()` hook to `Layout_V2_Main` to trigger auth verification
+
+### Changed
+- **PatientSummary Component** (2025-01-XX)
+  - Now receives `isAuthenticated` prop from Redux state
+  - Props passed through component hierarchy: `PatientManager` → `PatientSummary` → `MedicationTier` → `MedicationItem`
+  - Added `baseURL` constant for API endpoint construction
+
+## [Previous versions would go here]