Fix regression: exporter disappear from layer information sub dock

An exporter tool was available in the layer information sub dock up to version 3.8.
It has desappear with the ability to disable the export of layer in attribute layer.

To get back this feature, the exporter is available for all layer publshed in WFS if no attribute table config is defined or
if export in attribute table is not disabled for any layer in attribute table.

The exporter is disable if at least it has been disabled for one layer in attribute table config and it is not enabled for this layer.

Author: rldhont

assets/src/legacy/switcher-layers-actions.js

@@ -176,15 +176,32 @@ var lizLayerActionButtons = function() {
             if ( 'exportLayers' in lizMap.config.options
                 && lizMap.config.options.exportLayers == 'True'
                 && featureTypes != null
-                && featureTypes.length != 0 ) {
+                && featureTypes.length != 0
+                && layerConfig.typename != undefined) {
                 var exportFormats = lizMap.mainLizmap.initialConfig.vectorLayerResultFormat;
                 var options = '';
                 for ( const format of exportFormats ) {
                     options += '<option value="'+format+'">'+format+'</option>';
                 }
+                // Check export enabled
+                // By default, export is enabled for all layers with typename
+                let exportEnabled = true;
+                // If attribute layers is defined, we have to check if the publisher
+                // has disabled export in attribute table config
+                const attrLayersConfig = lizMap.mainLizmap.initialConfig.attributeLayers;
+                if (attrLayersConfig !== null) {
+                    const attrLayerConfigsLen = attrLayersConfig.layerConfigs.length;
+                    const exportLayersLen = attrLayersConfig.layerConfigs.filter(attr => attr.exportEnabled).length;
+                    // If some layers have export disabled, we have to check if the current layer is in the list
+                    if (attrLayerConfigsLen != exportLayersLen) {
+                        const attrLayerConfig = attrLayersConfig.layerConfigs.find(layer => layer.id === layerConfig.id);
+                        // If the layer is not in the list, export is disabled
+                        // else export is available as definde in attribute layer config
+                        exportEnabled = (attrLayerConfig !== undefined && attrLayerConfig.exportEnabled);
+                    }
+                }
                 // Export layer
-                // Only if layer is in attribute table
-                if( options != '' && layerConfig.typename != undefined) {
+                if( options != '' && exportEnabled) {
                     html+= '        <dt>'+lizDict['layer.metadata.export.title']+'</dt>';
                     html+= '<dd>';
                     html+= '<select class="exportLayer '+isBaselayer+'">';

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

@@ -1999,6 +1999,10 @@ public function getUpdatedConfig()
             }
         }
 
+        // Add export layer right
+        if ($this->appContext->aclCheck('lizmap.tools.layer.export', $this->repository->getKey())) {
+            $configJson->options->exportLayers = 'True';
+        }
         // Set layers export permissions
         $this->setLayersExportPermissions($configJson, $userGroups);