Dynamic Routing in Grav using Flex Objects

gistfile1.md

In my-plugin/my-plugin.php:

public function onPluginsInitialized(): void {
   ...

  $this->router();
}
public function router() {
 /** @var Uri $uri */
 $uri = $this->grav['uri'];
 $route = Uri::getCurrentRoute()->getRoute();

 if (Utils::startsWith($route, '/locations')) {
   $this->enable([
     'onPagesInitialized' => ['addLocationPage', 0]
   ]);
 }
}
public function addLocationPage() {
 $route = Uri::getCurrentRoute()->getRoute();
 $parts = explode("/", $route);
 $path = array_shift($parts);

 /** @var Pages $pages */
 $pages = $this->grav['pages'];

 if ($pages->find($route)) {
   /** @var Debugger $debugger */
   $debugger = $this->grav['debugger'];
   $debugger->addMessage("Page {$route} already exists, page cannot be added", 'error');
   return;
 }

 $flex = Grav::instance()->get('flex');
 $location = $flex->getObject($path, 'locations');

 $page = $pages->find('/locations/location');
 if ($page) {
   $page->id($page->modified() . md5($route));
   $page->slug(basename($route));
   $page->folder(basename($route));
   $page->route($route);
   // $page->rawRoute($route);
   $page->modifyHeader('object', $path);
   if ($location) {
     $page->modifyHeader('title', $location->getProperty('name'));
   }
   $pages->addPage($page, $route);
 }
}

that's all the code for it in my-plugin/my-plugin.php then i created a placeholder page at /locations/location/location.md with just this for front matter

---
title: Location
object: null
---

So basically what's happening is upon visiting that route, your plugin is modifying the barebones page on the fly and replacing object: null with your flex object path. Then in my template for that page, location.html.twig i use that path that was replaced to retrieve the flex object and use it in my template like so

{% set flex = grav['flex_objects'] %}
{% set directory = flex.directory('locations') %}
{% set object = directory.getObject(header.object) %}

<h1 class="text-3xl md:text-5xl">
  {{ object.name }}
</h1>