Add refactoring recommendations for controller/template/routing separation

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Pontoporeia
2026-03-31 23:06:45 +02:00
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# Posterg: Refactoring Recommendations
Concrete improvements to the separation between templating, routing, and backend logic — staying in PHP, no framework required.
---
## 1. Extract a Micro-Router + Middleware Pipeline
### Problem
Every file repeats the same preamble. The 7 action handlers and 17 page controllers all independently:
```php
require_once __DIR__ . '/../../config/bootstrap.php';
require_once __DIR__ . '/../../src/AdminAuth.php';
AdminAuth::requireLogin();
if (empty($_SESSION['csrf_token'])) {
$_SESSION['csrf_token'] = bin2hex(random_bytes(32));
}
require_once __DIR__ . '/../../src/Database.php';
```
This is ~6-8 identical lines per file × 24 files = ~170 lines of pure duplication. When the CSRF check pattern changes, every action handler must be updated in lockstep.
### Solution
Create `src/App.php` — a thin request dispatcher with middleware hooks:
```php
// src/App.php
class App {
private static bool $booted = false;
/** Boot once per request: load Database, ensure CSRF token exists. */
public static function boot(): Database {
if (!self::$booted) {
require_once APP_ROOT . '/src/Database.php';
self::$booted = true;
}
if (empty($_SESSION['csrf_token'])) {
$_SESSION['csrf_token'] = bin2hex(random_bytes(32));
}
return Database::getInstance();
}
/** Gate for admin pages: auth + CSRF token. */
public static function adminGuard(): Database {
require_once APP_ROOT . '/src/AdminAuth.php';
AdminAuth::requireLogin();
return self::boot();
}
/** Validate CSRF on POST. Call at the top of every action handler. */
public static function verifyCsrf(): void {
if ($_SERVER['REQUEST_METHOD'] !== 'POST'
|| !isset($_POST['csrf_token'], $_SESSION['csrf_token'])
|| !hash_equals($_SESSION['csrf_token'], $_POST['csrf_token'])) {
http_response_code(403);
exit('CSRF token invalide.');
}
}
/** Regenerate CSRF after a successful mutation. */
public static function rotateCsrf(): void {
$_SESSION['csrf_token'] = bin2hex(random_bytes(32));
}
/** Flash a message into the session and redirect. */
public static function redirect(string $url, ?string $success = null, ?string $error = null): never {
if ($success) $_SESSION['success'] = $success;
if ($error) $_SESSION['error'] = $error;
header('Location: ' . $url);
exit;
}
}
```
Every admin page becomes:
```php
<?php
require_once __DIR__ . '/../../config/bootstrap.php';
$db = App::adminGuard();
// ... page-specific logic
```
Every action handler becomes:
```php
<?php
require_once __DIR__ . '/../../../config/bootstrap.php';
$db = App::adminGuard();
App::verifyCsrf();
// ... mutation logic
App::rotateCsrf();
App::redirect('/admin/', success: 'Done.');
```
**Impact**: Eliminates ~170 lines of duplication. Centralises the CSRF lifecycle (generate, verify, rotate) in one place. Any change to the auth or CSRF pattern is a single-file edit.
---
## 2. Separate Controllers from Templates
### Problem
Every page file (e.g. `public/index.php`, `public/search.php`, `public/admin/edit.php`) is a single file that mixes three concerns:
1. **Data fetching** (DB queries, input validation, pagination math)
2. **View variable preparation** (`$pageTitle`, `$ogTags`, `$extraCss`, `$bodyClass`)
3. **HTML rendering** (the entire template, inline)
`system.php` is the extreme case: 400+ lines of PHP logic (systemd checks, curl pings, disk stats, log parsing, nginx syntax highlighting) followed by 200+ lines of inline `<style>`, then 200+ lines of HTML, then 30+ lines of inline `<script>`.
`search.php` is another: the répertoire index view and the search results view are two entirely different pages sharing a single file because they share a URL.
### Solution
Introduce a `controllers/` directory. Each controller is a function that does the data work and returns an associative array. The page file becomes a thin bridge.
**Directory structure:**
```
src/
App.php ← new: middleware/helpers
controllers/
HomeController.php
SearchController.php
TfeController.php
admin/
ThesisListController.php
ThesisEditController.php
ThesisAddController.php
TagController.php
PageController.php
SystemController.php
AccountController.php
...existing files...
templates/
public/
home.php
search-results.php
search-index.php
tfe.php
apropos.php
licence.php
admin/
thesis-list.php
thesis-edit.php
thesis-add.php
tags.php
pages-list.php
pages-edit.php
system.php
account.php
...existing shared templates (head.php, header.php, footer.php)...
```
**Example — `search.php` split:**
```php
// src/controllers/SearchController.php
class SearchController {
public static function index(Database $db): array {
// Collect params, run queries, compute pagination
// ...all current logic from the top of search.php...
return [
'hasSearch' => $hasSearch,
'results' => $results,
'totalItems' => $totalItems,
'totalPages' => $totalPages,
'years' => $years,
'orientations'=> $orientations,
'apPrograms' => $apPrograms,
'keywords' => $keywords,
'students' => $students,
'authorMap' => $authorMap,
'page' => $page,
'error' => $validationError,
// Template config
'pageTitle' => 'Répertoire Posterg',
'bodyClass' => 'search-body',
'extraCss' => ['/assets/css/search.css'],
'currentNav' => 'repertoire',
];
}
}
```
```php
// public/search.php (entire file)
<?php
require_once __DIR__ . '/../config/bootstrap.php';
require_once APP_ROOT . '/src/RateLimit.php';
// Rate limiting (stays here — it's a routing concern)
$rateLimit = new RateLimit(30, 60);
if (!$rateLimit->check()) { /* ...429 response... */ }
$rateLimit->sendHeaders();
$db = App::boot();
require_once APP_ROOT . '/src/controllers/SearchController.php';
$data = SearchController::index($db);
extract($data); // populates $hasSearch, $results, $pageTitle, etc.
include APP_ROOT . '/templates/head.php';
include APP_ROOT . '/templates/header.php';
if ($hasSearch) {
include APP_ROOT . '/templates/public/search-results.php';
} else {
include APP_ROOT . '/templates/public/search-index.php';
}
include APP_ROOT . '/templates/footer.php';
```
```
// templates/public/search-results.php
// Pure HTML + minimal <?= ?> for output. No DB queries. No input processing.
```
**Impact**: Templates become auditable for XSS — they only do output. Controllers are testable — they return arrays, no output buffering needed. The `extract()` bridge keeps the familiar variable-name convention without changing every template.
---
## 3. Introduce a `render()` Helper to Replace the 5-Line Include Chain
### Problem
Every page ends with the same sequence:
```php
include APP_ROOT . '/templates/head.php';
include APP_ROOT . '/templates/header.php';
// ... main content ...
include APP_ROOT . '/templates/footer.php'; // or admin/footer.php
```
The admin variant also requires `$isAdmin = true; $bodyClass = 'admin-body';` to be set before the head include. Forgetting any variable or include breaks the page silently.
### Solution
Add a `render()` function to `App`:
```php
// In src/App.php
public static function render(string $template, array $vars = []): void {
extract($vars);
include APP_ROOT . '/templates/head.php';
include APP_ROOT . '/templates/header.php';
include APP_ROOT . '/templates/' . $template;
// Choose footer based on admin flag
if (!empty($isAdmin)) {
include APP_ROOT . '/templates/admin/footer.php';
} else {
include APP_ROOT . '/templates/footer.php';
}
}
```
Every page becomes:
```php
// public/licence.php
<?php
require_once __DIR__ . '/../config/bootstrap.php';
$db = App::boot();
require_once APP_ROOT . '/src/controllers/LicenceController.php';
App::render('public/licence.php', LicenceController::index($db));
```
Every admin page becomes:
```php
// public/admin/tags.php
<?php
require_once __DIR__ . '/../../config/bootstrap.php';
$db = App::adminGuard();
require_once APP_ROOT . '/src/controllers/admin/TagController.php';
App::render('admin/tags.php', TagController::index($db));
```
**Impact**: No more forgotten includes. The head→header→content→footer pipeline is enforced. Admin footer selection is automatic. Template variables are explicit (passed as array keys, not ambient scope).
---
## 4. Consolidate Action Handlers into Controller Methods
### Problem
The `public/admin/actions/` directory contains 7 POST-only files that each:
1. Require bootstrap + auth
2. Verify CSRF
3. Extract + validate `$_POST` data
4. Call `Database` methods
5. Rotate CSRF
6. Flash a message
7. Redirect
Steps 1-2 and 5-7 are identical in every file. The actual business logic (step 4) is usually 5-15 lines.
`actions/publish.php` (95 lines) does exactly one thing: flip `is_published` on 1-N theses. The other 80 lines are auth, CSRF, validation boilerplate.
### Solution
Merge each action into its controller as a `handlePost()` or action-specific static method:
```php
// src/controllers/admin/ThesisListController.php
class ThesisListController {
public static function index(Database $db): array {
// ... current admin/index.php data logic ...
}
public static function publish(Database $db): never {
App::verifyCsrf();
$action = $_POST['action'] ?? '';
$isBulk = !empty($_POST['bulk']);
// ... 15 lines of actual logic ...
App::rotateCsrf();
App::redirect('/admin/', success: "$count TFE(s) publié(s).");
}
public static function toggleMaintenance(Database $db): never {
App::verifyCsrf();
// ... 6 lines ...
App::rotateCsrf();
App::redirect('/admin/', success: 'Maintenance toggled.');
}
}
```
The page file handles dispatch:
```php
// public/admin/index.php
<?php
require_once __DIR__ . '/../../config/bootstrap.php';
$db = App::adminGuard();
require_once APP_ROOT . '/src/controllers/admin/ThesisListController.php';
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$action = $_POST['_action'] ?? '';
match($action) {
'publish' => ThesisListController::publish($db),
'maintenance' => ThesisListController::toggleMaintenance($db),
default => App::redirect('/admin/', error: 'Action inconnue.'),
};
}
App::render('admin/thesis-list.php', ThesisListController::index($db));
```
**Or** keep the existing `actions/*.php` files but reduce each to 3 lines:
```php
// public/admin/actions/publish.php (entire file)
<?php
require_once __DIR__ . '/../../../config/bootstrap.php';
$db = App::adminGuard();
App::verifyCsrf();
require_once APP_ROOT . '/src/controllers/admin/ThesisListController.php';
ThesisListController::publish($db);
```
**Impact**: The `actions/` directory goes from 7 files × 50-100 lines each ≈ 500 lines, to 7 files × 5 lines each ≈ 35 lines. The business logic moves into testable controller methods.
---
## 5. Extract Inline CSS and JS from `system.php`
### Problem
`system.php` contains:
- 180 lines of `<style>` embedded in the page
- 40 lines of `<script>` embedded in the page
- 12 PHP helper functions defined inline (`safeExec`, `systemdStatus`, `localHttpCheck`, `humanBytes`, `statusLabel`, `statusClass`, `readLogTail`, `logLineClass`, `nginxLineClass`)
This makes it the largest file in the project (500+ lines) and impossible to cache the CSS/JS independently.
### Solution
1. Move the `<style>` block → `public/assets/css/system.css`, reference it via `$extraCss`
2. Move the `<script>` block → `public/assets/js/system.js`, reference it via `$extraJs`
3. Move the 12 helper functions → `src/controllers/admin/SystemController.php`
4. Move the data-gathering logic (checks array, PHP info, disk stats, log reading) into `SystemController::index()`
The template becomes pure HTML with `<?= ?>` interpolation.
**Impact**: `system.php` goes from ~500 lines to ~5 lines (boot + controller + render). The CSS/JS becomes cacheable by the browser (nginx `expires 30d` rule already exists for `.css`/`.js`). The helpers become unit-testable.
---
## 6. Introduce Template Partials for Repeated UI Patterns
### Problem
Several HTML patterns are copy-pasted across templates:
**Flash messages** — Identical block in `admin/index.php`, `admin/edit.php`, `admin/tags.php`, `admin/pages.php`, `admin/account.php`:
```php
<?php if (isset($_SESSION['error'])): ?>
<div class="admin-alert admin-alert--error">⚠ <?= htmlspecialchars($_SESSION['error']); unset($_SESSION['error']); ?></div>
<?php endif; ?>
<?php if (isset($_SESSION['success'])): ?>
<div class="admin-alert admin-alert--success">✓ <?= htmlspecialchars($_SESSION['success']); unset($_SESSION['success']); ?></div>
<?php endif; ?>
```
**Pagination** — Near-identical block in `index.php` and `search.php` (30 lines each, slightly different URL building).
**Select dropdowns with "selected" logic** — Repeated in `admin/add.php` and `admin/edit.php` for orientation, AP, finality, license, access type.
**Jury fieldset + JS** — Duplicated between `admin/add.php` and `admin/edit.php` (50+ lines of identical HTML + 20 lines of identical JS).
### Solution
Create small partial templates:
```
templates/
partials/
flash-messages.php ← reads $_SESSION['error'] / $_SESSION['success']
pagination.php ← receives $page, $totalPages, $baseUrl
admin/
select-field.php ← receives $name, $label, $options, $selected
checkbox-list.php ← receives $name, $label, $options, $checked
jury-fieldset.php ← receives $jury (array), outputs fieldset + JS
```
**Example — `flash-messages.php`:**
```php
<?php
// templates/partials/flash-messages.php
$_flashError = $_SESSION['error'] ?? $_SESSION['admin_error'] ?? $_SESSION['edit_error'] ?? null;
$_flashSuccess = $_SESSION['success'] ?? $_SESSION['admin_success'] ?? $_SESSION['edit_success'] ?? null;
unset($_SESSION['error'], $_SESSION['success'], $_SESSION['admin_error'],
$_SESSION['admin_success'], $_SESSION['edit_error'], $_SESSION['edit_success']);
?>
<?php if ($_flashError): ?>
<div class="admin-alert admin-alert--error">⚠ <?= htmlspecialchars($_flashError) ?></div>
<?php endif; ?>
<?php if ($_flashSuccess): ?>
<div class="admin-alert admin-alert--success">✓ <?= htmlspecialchars($_flashSuccess) ?></div>
<?php endif; ?>
```
This also fixes a latent bug: the project uses 6 different session keys for flash messages (`error`, `success`, `admin_error`, `admin_success`, `edit_error`, `edit_success`, `form_error`). Centralising flash handling would unify these into two keys.
**Impact**: Eliminates ~200 lines of duplicated HTML. The jury fieldset (duplicated between add and edit) becomes a single 50-line partial. Form field partials make admin pages shorter and more consistent.
---
## 7. Unify Flash Message Keys
### Problem
The project uses 7 different session keys for flash messages across different pages:
| Key | Used by |
|-----|---------|
| `$_SESSION['error']` | `admin/index.php`, `visibility.php`, `account.php` |
| `$_SESSION['success']` | `admin/index.php`, `visibility.php`, `pages.php`, `account.php` |
| `$_SESSION['admin_error']` | `tags.php` |
| `$_SESSION['admin_success']` | `tags.php` |
| `$_SESSION['edit_error']` | `admin/edit.php` |
| `$_SESSION['edit_success']` | `admin/edit.php` |
| `$_SESSION['form_error']` | `admin/add.php` |
| `$_SESSION['form_data']` | `admin/add.php` (re-population) |
This means flash messages can silently persist across pages if a redirect sends the user somewhere that doesn't read the matching key.
### Solution
Standardise on two keys: `$_SESSION['_flash_error']` and `$_SESSION['_flash_success']`. Consume them in the shared `flash-messages.php` partial. Add `App::flash(string $type, string $message)` helper.
---
## 8. Move OG Tag Construction into Controller Logic
### Problem
Every public page constructs `$ogTags` inline before the template, with ~15 lines of boilerplate. `tfe.php` has 25 lines of OG logic including image resolution (banner → cover → none) and description truncation.
### Solution
Move OG tag logic into each controller's return array. Create a helper:
```php
// In src/App.php or a dedicated helpers file
public static function ogTags(array $overrides = []): array {
return array_merge([
'type' => 'website',
'site_name' => 'Posterg ERG',
'title' => 'Posterg',
'description' => '',
'url' => '',
'image' => '',
], $overrides);
}
```
The TFE controller builds the OG image resolution as part of its data preparation. The template never touches it.
---
## Summary: Proposed File Layout
```
src/
App.php ← NEW: boot, adminGuard, verifyCsrf, render, redirect, flash
Database.php ← unchanged
AdminAuth.php ← unchanged
RateLimit.php ← unchanged
Parsedown.php ← unchanged
config.php ← unchanged
controllers/
HomeController.php ← extracted from public/index.php
SearchController.php ← extracted from public/search.php
TfeController.php ← extracted from public/tfe.php
AproposController.php ← extracted from public/apropos.php
LicenceController.php ← extracted from public/licence.php
admin/
ThesisListController.php ← extracted from admin/index.php + actions/publish.php + actions/maintenance.php
ThesisEditController.php ← extracted from admin/edit.php + actions/edit.php
ThesisAddController.php ← extracted from admin/add.php + actions/formulaire.php
TagController.php ← extracted from admin/tags.php + actions/tag.php
PageController.php ← extracted from admin/pages.php + pages-edit.php + actions/page.php
SystemController.php ← extracted from admin/system.php (400 lines of logic)
AccountController.php ← extracted from admin/account.php + actions/account.php
ImportController.php ← extracted from admin/import.php
templates/
head.php ← unchanged
header.php ← unchanged
footer.php ← unchanged
search-bar.php ← unchanged
admin/
footer.php ← unchanged
partials/
flash-messages.php ← NEW
pagination.php ← NEW
admin/
jury-fieldset.php ← NEW (deduplicated from add.php + edit.php)
select-field.php ← NEW
checkbox-list.php ← NEW
public/
home.php ← extracted HTML from index.php
search-results.php ← extracted HTML from search.php (results view)
search-index.php ← extracted HTML from search.php (répertoire view)
tfe.php ← extracted HTML from tfe.php
apropos.php ← extracted HTML from apropos.php
licence.php ← extracted HTML from licence.php
admin/
thesis-list.php ← extracted HTML from admin/index.php
thesis-edit.php ← extracted HTML from admin/edit.php
thesis-add.php ← extracted HTML from admin/add.php
tags.php ← extracted HTML from admin/tags.php
pages-list.php ← extracted HTML from admin/pages.php
pages-edit.php ← extracted HTML from admin/pages-edit.php
system.php ← extracted HTML from admin/system.php
account.php ← extracted HTML from admin/account.php
public/
index.php ← 5-8 lines: boot, controller, render
search.php ← 8-10 lines: boot, rate limit, controller, render
tfe.php ← 5-8 lines
apropos.php ← 5-8 lines
licence.php ← 5-8 lines
media.php ← unchanged (already clean)
maintenance.php ← unchanged
live-reload.php ← unchanged
admin/
index.php ← 8-10 lines: boot, dispatch POST or render
edit.php ← 8-10 lines
add.php ← 8-10 lines
tags.php ← 6-8 lines
pages.php ← 5-8 lines
pages-edit.php ← 5-8 lines
system.php ← 5-8 lines
account.php ← 8-10 lines
import.php ← 5-8 lines
login.php ← unchanged
logout.php ← unchanged
actions/ ← can be REMOVED (merged into controllers)
OR reduced to 3-5 line stubs
```
## Estimated Impact
| Metric | Before | After |
|--------|--------|-------|
| Lines in `public/` page files | ~4,200 | ~200 |
| Lines in `actions/` handlers | ~500 | 0 (merged) |
| Duplicated boilerplate | ~300 lines | ~0 |
| Duplicated HTML (jury, flash, pagination) | ~200 lines | ~0 |
| `system.php` | 530 lines | ~8 lines (page) + ~180 (controller) + ~100 (CSS) + ~30 (JS) |
| Testable controller methods | 0 | ~15 |
| Flash session key variants | 7 | 2 |
Total net reduction: ~8001,000 lines eliminated through deduplication, with cleaner separation making the remaining code auditable and testable.
## Execution Order
This can be done incrementally, one page at a time, with zero disruption:
1. **Create `src/App.php`** with `boot()`, `adminGuard()`, `verifyCsrf()`, `rotateCsrf()`, `redirect()`, `render()`, `flash()`
2. **Create `templates/partials/flash-messages.php`** and adopt it in one admin page
3. **Extract `SystemController`** — the biggest single-file win (500 → 8 lines)
4. **Extract `SearchController`** — the most complex public page
5. **Extract `ThesisEditController`** — merges `edit.php` + `actions/edit.php`, deduplicates jury fieldset
6. **Do remaining controllers one by one**, smallest first
7. **Unify flash keys** project-wide as the last step

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@@ -10,3 +10,4 @@
- `common.css`: `.site-nav``header nav`, `.site-nav__logo``header nav > a`, etc.
- `admin.css`: `.admin-nav``.admin-body header nav`, logout via `[data-nav-logout]` attribute
- [x] PHP vs Flask architecture analysis (`ANALYSIS_PHP_VS_FLASK.md`)
- [x] Refactoring recommendations for controller/template separation (`REFACTORING_RECOMMENDATIONS.md`)