# Codebase Concerns

**Analysis Date:** 2026-05-05

## Security Considerations

**Hardcoded database credentials in version control:**
- Risk: Database password and host exposed in repository; any repo access = DB access
- Files: `config.php` (primary), also required in `ajax.php`, `admin/ajax.php`, `admin/index.php`, `download.php`, `api/contact_map.php`, `index.php`
- Current mitigation: None
- Fix: Move to `.env` file, add `.env` to `.gitignore`, create `.env.example`

**Hardcoded Google reCAPTCHA secret key:**
- Risk: Secret key `6Lfaovgl...` hardcoded and repeated 8 times in one file
- Files: `plugins/special-actions-middle.php` (lines ~242, 296, 453, 531, 602, 679, 745)
- Current mitigation: None
- Fix: Move to config/settings, extract to single constant or `pp_settings` entry

**MD5 password hashing:**
- Risk: MD5 is cryptographically broken — rainbow table attacks trivial
- Files: `autoload/admin/factory/class.Users.php`, `autoload/admin/class.Site.php`
- Current mitigation: None
- Fix: Replace with `password_hash()` (bcrypt) + `password_verify()`

**PHP object injection via `unserialize()` on cookie data:**
- Risk: Attacker-controlled cookie triggers PHP object injection / RCE
- Files: `admin/ajax/pages.php` (`unserialize($_COOKIE['cookie_menus'])`, `unserialize($_COOKIE['cookie_pages'])`)
- Also in: `admin/templates/articles/article-edit.php`, `admin/templates/layouts/layout-edit.php`, `admin/templates/pages/pages-list.php`, `admin/templates/pages/pages-browse-list.php`
- Current mitigation: None
- Fix: Replace with `json_decode()` for cookie state storage

**Path traversal in file download:**
- Risk: Arbitrary file read — attacker can request any file on server
- Files: `get_file.php` (no validation on `$_GET['fileUrl']` before `readfile()`)
- Current mitigation: None
- Fix: Whitelist allowed paths, validate against upload directory only

**File upload without MIME type validation:**
- Risk: Executable files (`.php`) may be uploaded with double extension bypass
- Files: `plugins/special-actions-middle.php` (lines ~313-316, `move_uploaded_file()` with unsanitized `$_FILES['files']['name']`)
- Current mitigation: Extension check only (bypassable)
- Fix: Validate MIME type via `finfo_file()`, restrict upload directory execution, add file size limits

**SQL injection risk via string concatenation:**
- Risk: Direct variable injection into SQL strings (not all queries use Medoo parameterization)
- Files:
  - `autoload/front/factory/class.Languages.php:19` — `domain` parameter in raw SQL
  - `autoload/admin/factory/class.Pages.php:353` — `lang` variable in raw SQL
  - `autoload/admin/factory/class.Articles.php:149,163,181` — multiple concatenations
- Current mitigation: Medoo handles most queries safely; raw SQL in edge cases
- Fix: Replace raw SQL with Medoo parameterized queries throughout

**User input echoed without `htmlspecialchars()`:**
- Risk: XSS (Cross-Site Scripting) in email confirmations and form outputs
- Files: `ajax.php:64,82-84`, `plugins/special-actions-middle.php:253-256`
- Current mitigation: None
- Fix: Apply `htmlspecialchars($value, ENT_QUOTES)` before output

## Tech Debt

**No environment configuration separation:**
- Issue: Single `config.php` used for dev and production; no `.env` pattern
- Files: `config.php` and all entry points that require it
- Impact: Credentials hardcoded, can't safely commit config, no staging/prod separation
- Fix: Adopt `.env` pattern with `vlucas/phpdotenv` or equivalent

**God object `class.S.php`:**
- Issue: 1328-line class handling images, caching, sessions, email, DB utilities — no single responsibility
- Files: `autoload/class.S.php`
- Impact: Hard to test, hard to modify, used everywhere so any bug is widespread
- Fix: Gradually extract into dedicated service classes (`ImageService`, `CacheService`, `EmailService`)

**Duplicate reCAPTCHA verification logic:**
- Issue: reCAPTCHA verification code copy-pasted 8+ times instead of a shared function
- Files: `plugins/special-actions-middle.php` (lines 230-809, repeated blocks)
- Impact: Any bug fix requires 8 changes; any key rotation requires 8 updates
- Fix: Extract to `verify_recaptcha($response)` function called once per form

**Error suppression instead of error handling:**
- Issue: `error_reporting(0)` silences all errors; no logging to file or monitoring
- Files: `admin/ajax.php:2`, `admin/index.php:14`
- Impact: Silent failures, impossible to debug production issues
- Fix: Implement proper error logging (`error_log()` or PSR-3 logger), use try/catch in DB operations

**Mixed concerns in templates:**
- Issue: Business logic and data manipulation embedded in template PHP files
- Files: `admin/templates/articles/article-edit.php` (1143 lines), `admin/templates/pages/page-edit.php`
- Impact: Hard to maintain, duplicate logic between templates and factory classes
- Fix: Move all logic to controls/factory, pass pre-computed variables to templates

**Deprecated function usage:**
- Issue: `mime_content_type()` deprecated since PHP 5.3
- Files: `autoload/class.S.php:37`
- Fix: Replace with `finfo_file()`

## Performance Bottlenecks

**Large data file loaded at runtime:**
- Problem: `wojewodztwa.php` is 6548 lines of PHP arrays — loaded entirely for any request needing province data
- Files: `wojewodztwa.php`
- Cause: Static data embedded in PHP instead of database or JSON
- Fix: Move to `pp_provinces` table or JSON file with lazy loading

**Template placeholder replacement:**
- Problem: Layout HTML scanned for all placeholder patterns on every page request
- Files: `autoload/front/view/class.Site.php`
- Cause: String replacement for `[MENU:id]`, `[ARTYKULY:id]`, etc. on each render
- Improvement: Page caching (already implemented as opt-in, ensure enabled for high-traffic pages)

**WebP image generation:**
- Problem: WebP conversion happens on-demand per request (not pre-generated)
- Files: `autoload/class.Image.php`, `autoload/class.S.php`
- Cause: No background job system for image processing
- Impact: First request for each image is slow; cache/ fills over time
- Improvement: Pre-generate WebP on upload

## Fragile Areas

**Plugin hook file `special-actions-middle.php`:**
- Files: `plugins/special-actions-middle.php` (very large file with 8+ contact form handlers)
- Why fragile: Monolithic — all contact forms, reCAPTCHA, file uploads in one file; no shared validation
- Common failures: Adding a new form variant requires duplicating entire handler block
- Safe modification: Extract shared validation/email logic before adding new variants

**Template override system:**
- Files: `autoload/class.Tpl.php`, `templates/`, `templates_user/`
- Why fragile: Silent fallback from `templates_user/` to `templates/` — easy to edit wrong file
- Common failures: Edit `templates/` file thinking it's active, but `templates_user/` override takes precedence
- Safe modification: Always check both directories; `templates_user/` takes precedence

**Admin session / cookie auto-login:**
- Files: `admin/index.php` (lines 36-84)
- Why fragile: IP-based session validation can lock out admin on IP change; cookie auto-login not encrypted
- Common failures: Admin locked out after ISP IP change
- Safe modification: Test login flow after any changes to session handling

## Dependencies at Risk

**jQuery 1.11.1 (admin panel):**
- Risk: EOL since 2016; known XSS vulnerabilities
- Impact: Admin panel DOM manipulation, CKEditor compatibility
- Files: `admin/templates/site/main-layout.php`
- Migration: Upgrade to jQuery 3.x (breaking changes in `.live()`, `.size()` etc.)

**CKEditor (version unknown):**
- Risk: Older CKEditor 4.x versions have known XSS vulnerabilities
- Files: `libraries/ckeditor/`
- Migration: Audit version, update to latest CKEditor 4 LTS or migrate to CKEditor 5

**Medoo (version unknown, likely 1.x):**
- Risk: Medoo 1.x API differs significantly from 2.x; unmaintained in 1.x branch
- Files: `libraries/medoo/medoo.php`
- Migration: Audit API usage before upgrading to Medoo 2.x

## Missing Critical Features

**No environment configuration:**
- Problem: No way to run app locally without overwriting production credentials
- Blocks: Safe local development, CI/CD setup, multi-developer workflow
- Complexity: Low — add `.env` loading at top of `config.php`

**No error logging / monitoring:**
- Problem: Production errors are silently swallowed
- Blocks: Debugging production issues, alerting on failures
- Complexity: Low — configure `error_log()` to file + optional email alert

**No CSRF protection:**
- Problem: All forms lack CSRF token validation
- Blocks: Prevents CSRF attacks on contact/newsletter/admin forms
- Complexity: Medium — add token generation + validation middleware

**No automated tests:**
- Problem: Zero test coverage — no regression safety net for changes
- Blocks: Refactoring, safe dependency upgrades, CI/CD
- Complexity: High — requires setting up PHPUnit, test DB, writing tests from scratch

## Test Coverage Gaps

**Entire codebase:**
- What's not tested: Everything — factory methods, controls, views, AJAX handlers
- Risk: Any change could break functionality silently
- Priority: High for security-sensitive paths (auth, file uploads, SQL queries)
- Difficulty: High — no test infrastructure exists; factory methods use static Medoo instance

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*Concerns audit: 2026-05-05*
*Update as issues are fixed or new ones discovered*