BookStack/app/Api/ApiDocsGenerator.php

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<?php namespace BookStack\Api;
use BookStack\Http\Controllers\Api\ApiController;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Route;
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use Illuminate\Support\Str;
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use ReflectionClass;
use ReflectionException;
use ReflectionMethod;
class ApiDocsGenerator
{
protected $reflectionClasses = [];
protected $controllerClasses = [];
/**
* Generate API documentation.
*/
public function generate(): Collection
{
$apiRoutes = $this->getFlatApiRoutes();
$apiRoutes = $this->loadDetailsFromControllers($apiRoutes);
$apiRoutes = $this->loadDetailsFromFiles($apiRoutes);
$apiRoutes = $apiRoutes->groupBy('base_model');
return $apiRoutes;
}
/**
* Load any API details stored in static files.
*/
protected function loadDetailsFromFiles(Collection $routes): Collection
{
return $routes->map(function (array $route) {
$exampleTypes = ['request', 'response'];
foreach ($exampleTypes as $exampleType) {
$exampleFile = base_path("dev/api/{$exampleType}s/{$route['name']}.json");
$exampleContent = file_exists($exampleFile) ? file_get_contents($exampleFile) : null;
$route["example_{$exampleType}"] = $exampleContent;
}
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return $route;
});
}
/**
* Load any details we can fetch from the controller and its methods.
*/
protected function loadDetailsFromControllers(Collection $routes): Collection
{
return $routes->map(function (array $route) {
$method = $this->getReflectionMethod($route['controller'], $route['controller_method']);
$comment = $method->getDocComment();
$route['description'] = $comment ? $this->parseDescriptionFromMethodComment($comment) : null;
$route['body_params'] = $this->getBodyParamsFromClass($route['controller'], $route['controller_method']);
return $route;
});
}
/**
* Load body params and their rules by inspecting the given class and method name.
* @throws \Illuminate\Contracts\Container\BindingResolutionException
*/
protected function getBodyParamsFromClass(string $className, string $methodName): ?array
{
/** @var ApiController $class */
$class = $this->controllerClasses[$className] ?? null;
if ($class === null) {
$class = app()->make($className);
$this->controllerClasses[$className] = $class;
}
$rules = $class->getValdationRules()[$methodName] ?? [];
foreach ($rules as $param => $ruleString) {
$rules[$param] = explode('|', $ruleString);
}
return count($rules) > 0 ? $rules : null;
}
/**
* Parse out the description text from a class method comment.
*/
protected function parseDescriptionFromMethodComment(string $comment)
{
$matches = [];
preg_match_all('/^\s*?\*\s((?![@\s]).*?)$/m', $comment, $matches);
return implode(' ', $matches[1] ?? []);
}
/**
* Get a reflection method from the given class name and method name.
* @throws ReflectionException
*/
protected function getReflectionMethod(string $className, string $methodName): ReflectionMethod
{
$class = $this->reflectionClasses[$className] ?? null;
if ($class === null) {
$class = new ReflectionClass($className);
$this->reflectionClasses[$className] = $class;
}
return $class->getMethod($methodName);
}
/**
* Get the system API routes, formatted into a flat collection.
*/
protected function getFlatApiRoutes(): Collection
{
return collect(Route::getRoutes()->getRoutes())->filter(function ($route) {
return strpos($route->uri, 'api/') === 0;
})->map(function ($route) {
[$controller, $controllerMethod] = explode('@', $route->action['uses']);
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$baseModelName = explode('.', explode('/', $route->uri)[1])[0];
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$shortName = $baseModelName . '-' . $controllerMethod;
return [
'name' => $shortName,
'uri' => $route->uri,
'method' => $route->methods[0],
'controller' => $controller,
'controller_method' => $controllerMethod,
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'controller_method_kebab' => Str::kebab($controllerMethod),
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'base_model' => $baseModelName,
];
});
}
}