MOBILE-4407 url: Fix icon inside url resources

src/addons/mod/url/services/handlers/module.ts

@@ -107,18 +107,59 @@ export class AddonModUrlModuleHandlerService extends CoreModuleHandlerBase imple
 
         if (handlerData.buttons && hideButton !== undefined) {
             handlerData.buttons[0].hidden = hideButton;
-
-            if (module.contents && module.contents[0]) {
-                const icon = AddonModUrl.guessIcon(module.contents[0].fileurl);
-
-                // Calculate the icon to use.
-                handlerData.icon = CoreCourse.getModuleIconSrc(module.modname, module.modicon, icon);
         }
+
+        try {
+            handlerData.icon = await this.getIconSrc(module);
+        } catch {
+            // Ignore errors.
         }
 
         return handlerData;
     }
 
+    /**
+     * @inheritdoc
+     */
+    async getIconSrc(module?: CoreCourseModuleData): Promise<string | undefined> {
+        if (!module) {
+            return;
+        }
+
+        let mainFile = module.contents?.[0];
+
+        if (!mainFile) {
+            try {
+                // Try to get module contents, it's needed to get the URL with parameters.
+                const contents = await CoreCourse.getModuleContents(
+                    module,
+                    undefined,
+                    undefined,
+                    true,
+                    false,
+                    undefined,
+                    'url',
+                );
+
+                mainFile = contents[0];
+            } catch {
+                // Fallback in case is not prefetched.
+                const mod = await CoreCourse.getModule(module.id, module.course, undefined, true, false, undefined, 'url');
+
+                mainFile = mod.contents?.[0];
+            }
+        }
+
+        if (!mainFile) {
+            return;
+        }
+
+        const icon = AddonModUrl.guessIcon(mainFile.fileurl);
+
+        // Calculate the icon to use.
+        return CoreCourse.getModuleIconSrc(module.modname, module.modicon, icon);
+    }
+
     /**
      * Returns if contents are loaded to show link button.
      *