/**
 * COMPREHENSIVE FIX PLAN FOR PERMISSION HIERARCHY SYSTEM
 * 
 * ============================================================================
 * CURRENT ISSUES IDENTIFIED
 * ============================================================================
 * 
 * ISSUE #1: POPUP FORMS NOT LOADING FOR SUBADMINS
 * Problem: Logo change (and other settings) use modals that inject content
 *          but the includes/requires are not respecting subadmin permissions
 * Root Cause: admin_dashboard.php loads EVERYTHING regardless of permission level
 * Solution: Move modal population logic to separate API endpoints with enforcement
 * 
 * ISSUE #2: DELETE BUTTON WORKS FOR EDITORS (SHOULD NOT)
 * Problem: Subadmin with editor permission can delete blogs
 * Root Cause: Delete functionality not checking permission at action level
 * Solution: Add action enforcement before delete operations in blog pages
 * 
 * ISSUE #3: NO "BACK TO SUBADMIN DASHBOARD" BUTTON
 * Problem: Subadmins clicking admin pages don't see back button to their dashboard
 * Root Cause: Back button hard-coded to admin_dashboard.php instead of being conditional
 * Solution: Create helper function to generate contextual back button
 * 
 * ISSUE #4: LOGOUT REDIRECTS TO WEBSITE INSTEAD OF ADMIN LOGIN
 * Problem: Subadmin logout goes to website home instead of admin_login.php
 * Root Cause: logout_admin.php not checking user type before redirect
 * Solution: Modify logout to check is_subadmin and redirect accordingly
 * 
 * ISSUE #5: TOO MANY ENFORCEMENT FILES (HARD TO MAINTAIN)
 * Problem: 25+ individual enforce_manage_*.php files create complexity
 * Root Cause: Each file is tiny and repetitive
 * Solution: Create single unified permission_enforcer.php with reusable logic
 * 
 * ============================================================================
 * PHASE-BY-PHASE FIX STRATEGY
 * ============================================================================
 * 
 * PHASE 1: ANALYZE & CREATE UNIFIED ENFORCER
 * ─────────────────────────────────────────────
 * What: Create helpers/permission_enforcer.php (single unified file)
 * Why: Consolidate all 25 enforcement classes into one file
 * How:
 *   - Define static method: guardPage($feature)
 *   - Define static method: guardAction($feature, $action)
 *   - Define static method: getCapabilities($feature)
 *   - All classes reference this central enforcer
 * Benefit: One file to maintain, easier to debug, clearer logic
 * 
 * PHASE 2: FIX MODAL/POPUP LOADING FOR SUBADMINS
 * ─────────────────────────────────────────────
 * What: Separate modal content into API endpoints with permission checks
 * Why: Currently admin page loads all content without checking subadmin perms
 * How:
 *   - Create api_get_logo_form.php (enforces manage_logo view)
 *   - Create api_get_site_title_form.php (enforces manage_site_title view)
 *   - Modify admin_dashboard.php to call these APIs
 *   - Return 403 JSON if unauthorized
 * Result: Subadmins can only load modals they have permission for
 * 
 * PHASE 3: FIX DELETE BUTTON FOR BLOG EDITOR
 * ─────────────────────────────────────────
 * What: Add action enforcement to blog delete operations
 * Why: Currently editor can delete despite permission saying no
 * How:
 *   - Find delete button handler in admin_blogs.php
 *   - Already added: EnforceManageBlogs::guardAction('delete')
 *   - Add capability check to hide delete button:
 *     if ($guard['can_delete']) { show delete button }
 * Result: Editors cannot see or execute delete operations
 * 
 * PHASE 4: CREATE CONTEXTUAL BACK BUTTON
 * ────────────────────────────────────
 * What: Add helpers/get_back_button.php or similar
 * Why: Determine if user is admin or subadmin and link accordingly
 * How:
 *   - Create function: getBackButton()
 *   - Check: isset($_SESSION['is_subadmin']) && $_SESSION['is_subadmin'] === true
 *   - Return: Link to subadmin_dashboard.php (for subadmins)
 *   - Return: Link to admin_dashboard.php (for full admins)
 *   - Replace all hard-coded back buttons with this function
 * Result: Subadmins always return to their dashboard
 * 
 * PHASE 5: FIX LOGOUT REDIRECT
 * ────────────────────────────
 * What: Modify logout_admin.php to check user type
 * Why: Subadmin logout should go to admin_login.php
 * How:
 *   - Check: if (isset($_SESSION['is_subadmin']))
 *   - Redirect: header('Location: admin_login.php')
 *   - Else: Current redirect (homepage or admin_login)
 * Result: Subadmin logout goes to login, admin logout goes to homepage
 * 
 * PHASE 6: INTEGRATE & TEST
 * ────────────────────────
 * What: Update all affected files to use new central enforcer
 * Why: Consolidate code, improve maintainability
 * How: Replace enforce_manage_*.php includes with unified enforcer
 * Result: Cleaner code, easier to debug
 * 
 * ============================================================================
 * IMPLEMENTATION ORDER (SAFE, NON-DISRUPTIVE)
 * ============================================================================
 * 
 * Step 1: Create permission_enforcer.php (doesn't touch anything)
 * Step 2: Fix logout_admin.php (small, isolated change)
 * Step 3: Create get_back_button.php helper (doesn't break existing)
 * Step 4: Add back button to admin pages (UI only)
 * Step 5: Fix blog delete button (add capability check)
 * Step 6: Create API endpoints for modals (new code, doesn't break existing)
 * Step 7: Update admin_dashboard.php to use new APIs
 * Step 8: Test with subadmin account
 * 
 * ============================================================================
 * KEY DECISIONS
 * ============================================================================
 * 
 * ✅ KEEP existing enforce_manage_*.php files for now
 *    (They're already integrated, removing would break things)
 * 
 * ✅ CREATE permission_enforcer.php as unified option
 *    (Phased migration: can replace incrementally)
 * 
 * ✅ API ENDPOINTS for modals (not inline)
 *    (Cleaner separation, easier permission checking)
 * 
 * ✅ SESSION-BASED DETECTION for navigation
 *    (Check is_subadmin flag to decide back button location)
 * 
 * ✅ NO DATABASE OR SCHEMA CHANGES
 *    (Pure PHP logic, backward compatible)
 * 
 * ============================================================================
 * RISK MITIGATION
 * ============================================================================
 * 
 * ⚠️  RISK: Breaking full admin functionality
 *     MITIGATION: All changes check is_admin first, full admins bypass everything
 * 
 * ⚠️  RISK: FTP files loading late
 *     MITIGATION: Use semantic_search or grep to verify files before editing
 * 
 * ⚠️  RISK: Subadmin can bypass by manually calling API
 *     MITIGATION: EVERY API endpoint checks permission at top (enforcer)
 * 
 * ⚠️  RISK: Forgot a file that needs back button
 *     MITIGATION: Test with subadmin navigating entire flow
 * 
 * ============================================================================
 * TESTING STRATEGY FOR SUBADMIN ZAINAB
 * ============================================================================
 * 
 * TEST 1: Logo Access (viewer permission)
 * ├─ Login as zainab
 * ├─ Click Logo card on dashboard
 * ├─ CHECK: Logo form modal should load
 * ├─ CHECK: Upload button should be HIDDEN
 * ├─ TRY: Manual upload attempt → 403 error
 * └─ CLICK: "Back to Sub-admin" button → returns to subadmin_dashboard.php
 * 
 * TEST 2: Blog Access (editor permission)
 * ├─ Login as zainab
 * ├─ Click Blogs card on dashboard
 * ├─ CHECK: Blog page loads
 * ├─ CHECK: Create buttons visible
 * ├─ CHECK: Edit buttons visible
 * ├─ CHECK: Delete buttons should be HIDDEN
 * ├─ TRY: Manual delete attempt → 403 error
 * └─ CLICK: "Back to Sub-admin" button → returns to subadmin_dashboard.php
 * 
 * TEST 3: User Access (none permission)
 * ├─ Try to manually visit admin_manage_users.php
 * ├─ CHECK: Should redirect immediately to subadmin_dashboard.php
 * └─ Display error message: "You don't have permission to view this feature"
 * 
 * TEST 4: Logout Flow
 * ├─ From subadmin_dashboard.php → Click Logout
 * ├─ CHECK: Redirected to admin_login.php (NOT homepage)
 * └─ Session should be cleared
 * 
 */
?>
