feat: add CodeIgniter detector & analyzer

spec/functional_test/fixtures/php/codeigniter/app/Config/Routes.php

@@ -0,0 +1,42 @@
+<?php
+
+use CodeIgniter\Router\RouteCollection;
+
+/**
+ * @var RouteCollection $routes
+ */
+$routes->get('/', 'Home::index');
+$routes->get('about', 'Pages::about');
+$routes->post('login', 'Auth::login');
+$routes->get('users/(:num)', 'UserController::show/$1');
+$routes->put('users/(:num)', 'UserController::update/$1');
+$routes->delete('users/(:num)', 'UserController::delete/$1');
+
+$routes->match(['get', 'post'], 'contact', 'ContactController::handle');
+
+$routes->add('webhook', 'WebhookController::any');
+
+$routes->resource('photos');
+$routes->presenter('articles');
+
+$routes->group('admin', function ($routes) {
+    $routes->get('dashboard', 'AdminController::dashboard');
+    $routes->get('users', 'AdminController::users');
+
+    $routes->group('settings', function ($routes) {
+        $routes->get('profile', 'AdminSettings::profile');
+    });
+});
+
+$routes->group('api', ['namespace' => 'App\Controllers\Api'], function ($routes) {
+    $routes->get('status', 'StatusController::index');
+    $routes->post('items', 'ItemController::create');
+});
+
+$routes->group('tenant/(:num)', function ($routes) {
+    $routes->get('billing', 'BillingController::show');
+});
+
+$routes->environment('development', function ($routes) {
+    $routes->get('debug', 'Debug::index');
+});

spec/functional_test/fixtures/php/codeigniter/app/Controllers/Home.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Controllers;
+
+use CodeIgniter\Controller;
+
+class Home extends BaseController
+{
+    public function index()
+    {
+        return view('welcome_message');
+    }
+}

spec/functional_test/fixtures/php/codeigniter/composer.json

@@ -0,0 +1,6 @@
+{
+  "require": {
+    "php": "^8.1",
+    "codeigniter4/framework": "^4.4"
+  }
+}

spec/functional_test/fixtures/php/codeigniter/spark

@@ -0,0 +1,7 @@
+#!/usr/bin/env php
+<?php
+// CodeIgniter command-line tool
+require __DIR__ . '/vendor/autoload.php';
+
+$paths = new Config\Paths();
+require rtrim($paths->systemDirectory, '\\/ ') . DIRECTORY_SEPARATOR . 'bootstrap.php';

spec/functional_test/testers/php/codeigniter_spec.cr

@@ -0,0 +1,45 @@
+require "../../func_spec.cr"
+
+expected_endpoints = [
+  Endpoint.new("/", "GET"),
+  Endpoint.new("/about", "GET"),
+  Endpoint.new("/login", "POST"),
+  Endpoint.new("/users/{num}", "GET", [Param.new("num", "", "path")]),
+  Endpoint.new("/users/{num}", "PUT", [Param.new("num", "", "path")]),
+  Endpoint.new("/users/{num}", "DELETE", [Param.new("num", "", "path")]),
+  Endpoint.new("/contact", "GET"),
+  Endpoint.new("/contact", "POST"),
+  Endpoint.new("/webhook", "GET"),
+  Endpoint.new("/webhook", "POST"),
+  Endpoint.new("/webhook", "PUT"),
+  Endpoint.new("/webhook", "PATCH"),
+  Endpoint.new("/webhook", "DELETE"),
+  Endpoint.new("/photos", "GET"),
+  Endpoint.new("/photos", "POST"),
+  Endpoint.new("/photos/new", "GET"),
+  Endpoint.new("/photos/{id}", "GET", [Param.new("id", "", "path")]),
+  Endpoint.new("/photos/{id}/edit", "GET", [Param.new("id", "", "path")]),
+  Endpoint.new("/photos/{id}", "PUT", [Param.new("id", "", "path")]),
+  Endpoint.new("/photos/{id}", "PATCH", [Param.new("id", "", "path")]),
+  Endpoint.new("/photos/{id}", "DELETE", [Param.new("id", "", "path")]),
+  Endpoint.new("/articles", "GET"),
+  Endpoint.new("/articles/show/{id}", "GET", [Param.new("id", "", "path")]),
+  Endpoint.new("/articles/new", "GET"),
+  Endpoint.new("/articles/create", "POST"),
+  Endpoint.new("/articles/edit/{id}", "GET", [Param.new("id", "", "path")]),
+  Endpoint.new("/articles/update/{id}", "POST", [Param.new("id", "", "path")]),
+  Endpoint.new("/articles/remove/{id}", "GET", [Param.new("id", "", "path")]),
+  Endpoint.new("/articles/delete/{id}", "POST", [Param.new("id", "", "path")]),
+  Endpoint.new("/admin/dashboard", "GET"),
+  Endpoint.new("/admin/users", "GET"),
+  Endpoint.new("/admin/settings/profile", "GET"),
+  Endpoint.new("/api/status", "GET"),
+  Endpoint.new("/api/items", "POST"),
+  Endpoint.new("/tenant/{num}/billing", "GET", [Param.new("num", "", "path")]),
+  Endpoint.new("/debug", "GET"),
+]
+
+FunctionalTester.new("fixtures/php/codeigniter/", {
+  :techs     => 2,  # php_codeigniter + php_pure
+  :endpoints => 40, # 38 CodeIgniter routes + 2 php_pure files (Routes.php, Home.php)
+}, expected_endpoints).perform_tests

spec/unit_test/detector/php/codeigniter_detector_spec.cr

@@ -0,0 +1,62 @@
+require "../../../spec_helper"
+require "../../../../src/detector/detectors/php/*"
+
+describe "Detect CodeIgniter" do
+  options = create_test_options
+  instance = Detector::Php::CodeIgniter.new options
+
+  it "detects CodeIgniter from composer.json" do
+    composer_content = <<-JSON
+      {
+        "require": {
+          "php": "^8.1",
+          "codeigniter4/framework": "^4.4"
+        }
+      }
+      JSON
+    instance.detect("composer.json", composer_content).should be_true
+  end
+
+  it "detects CodeIgniter from spark CLI script" do
+    spark_content = <<-PHP
+      #!/usr/bin/env php
+      <?php
+      $paths = new Config\\Paths();
+      require __DIR__ . '/vendor/autoload.php';
+      PHP
+    instance.detect("spark", spark_content).should be_true
+  end
+
+  it "detects CodeIgniter from app/Config/Routes.php" do
+    routes_content = <<-'PHP'
+      <?php
+      use CodeIgniter\Router\RouteCollection;
+      $routes->get('/', 'Home::index');
+      PHP
+    instance.detect("app/Config/Routes.php", routes_content).should be_true
+  end
+
+  it "detects CodeIgniter from CodeIgniter namespace usage" do
+    controller_content = <<-'PHP'
+      <?php
+      namespace App\Controllers;
+      use CodeIgniter\Controller;
+      class Home extends BaseController {}
+      PHP
+    instance.detect("app/Controllers/Home.php", controller_content).should be_true
+  end
+
+  it "detects CodeIgniter 3 routes file" do
+    ci3_content = <<-PHP
+      <?php
+      $route['default_controller'] = 'home';
+      $route['products/(:num)'] = 'catalog/product_lookup_by_id/$1';
+      PHP
+    instance.detect("application/config/routes.php", ci3_content).should be_true
+  end
+
+  it "does not detect CodeIgniter from non-CodeIgniter files" do
+    instance.detect("index.php", "<?php echo 'Hello World';").should_not be_true
+    instance.detect("composer.json", %({"name": "app", "require": {"php": "^8.0"}})).should_not be_true
+  end
+end

src/analyzer/analyzer.cr

@@ -78,6 +78,7 @@ def initialize_analyzers(logger : NoirLogger)
     {"zap_sites_tree", Specification::ZapSitesTree},
     {"php_pure", Php::Php},
     {"php_cakephp", Php::CakePHP},
+    {"php_codeigniter", Php::CodeIgniter},
     {"php_laravel", Php::Laravel},
     {"php_slim", Php::Slim},
     {"php_symfony", Php::Symfony},