Add preload for initial fetch request

Author: rldhont

lizmap/modules/lizmap/lib/Project/Project.php

@@ -540,6 +540,25 @@ public function getWMSGetCapabilitiesUrl()
         );
     }
 
+    /**
+     * Get the WMS GetCapabilities Url.
+     *
+     * @return string
+     */
+    public function getWFSGetCapabilitiesUrl()
+    {
+        return $this->appContext->getFullUrl(
+            'lizmap~service:index',
+            array(
+                'repository' => $this->repository->getKey(),
+                'project' => $this->key,
+                'SERVICE' => 'WFS',
+                'VERSION' => '1.0.0',
+                'REQUEST' => 'GetCapabilities',
+            )
+        );
+    }
+
     /**
      * Get the WMTS GetCapabilities Url.
      *

lizmap/modules/view/controllers/lizMap.classic.php

@@ -213,6 +213,27 @@ public function index()
             'resourceUrlReplacement' => array(),
         );
 
+        // Add preload links
+        $rep->addPreloadLink(
+            jUrl::get(
+                'lizmap~service:getProjectConfig',
+                array('project' => $project, 'repository' => $repository),
+            ),
+            'fetch',
+            'application/json',
+        );
+        $rep->addPreloadLink(
+            jUrl::get(
+                'lizmap~service:getKeyValueConfig',
+                array('project' => $project, 'repository' => $repository),
+            ),
+            'fetch',
+            'application/json',
+        );
+        $rep->addPreloadLink($lproj->getWMSGetCapabilitiesUrl(), 'fetch', 'application/xml');
+        $rep->addPreloadLink($lproj->getWFSGetCapabilitiesUrl(), 'fetch', 'application/xml');
+        $rep->addPreloadLink($lproj->getWMTSGetCapabilitiesUrl(), 'fetch', 'application/xml');
+
         // Get optional WMS public url list
         $lser = lizmap::getServices();
         if ($lser->wmsPublicUrlList) {
@@ -316,6 +337,7 @@ function f($x)
             }
         }
 
+        // Add map theme
         $rep->addAssets('maptheme');
 
         // Add dockable css