Configure for use without Pressbooks. (#26)

app/admin.php

@@ -79,6 +79,8 @@ add_action('customize_register', function (\WP_Customize_Manager $wp_customize)
         'section'  => 'pb_network_social',
         'settings' => 'pb_network_twitter',
     ]);
+
+    if (function_exists('pb_meets_minimum_requirements') && pb_meets_minimum_requirements()) {
         $wp_customize->add_section('pb_front_page_catalog', [
             'title' => __('Front Page Catalog', 'aldine'),
             'priority' => 25,
@@ -101,6 +103,8 @@ add_action('customize_register', function (\WP_Customize_Manager $wp_customize)
             'section'  => 'pb_front_page_catalog',
             'settings' => 'pb_front_page_catalog_title',
         ]);
+    }
+
     $wp_customize->add_section('pb_network_contact_form', [
         'title' => __('Contact Form', 'aldine'),
         'priority' => 25,

app/controllers/App.php

@@ -126,6 +126,7 @@ class App extends Controller
 
     public static function catalogData($page = 1, $per_page = 10, $orderby = 'title', $license = '', $subject = '')
     {
+        if (function_exists('pb_meets_minimum_requirements') && pb_meets_minimum_requirements()) {
             $request = new \WP_REST_Request('GET', '/pressbooks/v2/books');
             $request->set_query_params([
                 'page' => $page,
@@ -149,5 +150,8 @@ class App extends Controller
                 $books = wp_list_sort($books, $orderby);
             }
             return ['pages' => $pages, 'books' => $books];
+        } else {
+            return ['pages' => 0, 'books' => []];
+        }
     }
 }

app/controllers/PageCatalog.php

@@ -8,11 +8,15 @@ class PageCatalog extends Controller
 {
     public function licenses()
     {
+        if (function_exists('pb_meets_minimum_requirements') && pb_meets_minimum_requirements()) {
             $licenses = (new \Pressbooks\Licensing())->getSupportedTypes();
             foreach ($licenses as $key => $value) {
                 $licenses[$key] = preg_replace("/\([^)]+\)/", '', $value['desc']);
             }
             return $licenses;
+        } else {
+            return [];
+        }
     }
 
     public function subjectGroups()

dist/mix-manifest.json

@@ -1,5 +1,5 @@
 {
     "/scripts/main.js": "/scripts/main.js?id=39e1eeb8ed8aa60c4413",
-    "/styles/main.css": "/styles/main.css?id=c39f8348a65d1cc30ad8",
+    "/styles/main.css": "/styles/main.css?id=be9f897fa23508d206d7",
     "/scripts/customizer.js": "/scripts/customizer.js?id=4237643703cf0c22354e"
 }

resources/assets/styles/layouts/_header.scss

@@ -178,17 +178,17 @@
         &:focus {
           color: var(--primary, $brand-primary);
         }
+      }
 
-        &:nth-child(1) {
+      &--catalog {
         margin-right: auto;
       }
 
-        &:nth-child(2) {
+      &--contact {
         margin: 0 1em 0 auto;
       }
-      }
 
-      .sep {
+      &--sep {
         display: inline-block;
         margin: 0 0.5em;
       }

resources/views/partials/header.blade.php

@@ -7,16 +7,20 @@
     <a class="toggle" href="#navigation">{{ __('Toggle menu', 'aldine') }}<span class="toggle__icon"></span></a>
     <a class="banner__brand" href="{{ home_url('/') }}"><span class="clip">{{ get_bloginfo('name', 'display') }}</span>{!! $site_logo !!}</a>
     <nav class="banner__navigation" id="navigation">
-        <a href="{{ home_url('/catalog') }}">Catalog</a>
-        <a href="#contact">Contact</a>
+        @if(function_exists('pb_meets_minimum_requirements') && pb_meets_minimum_requirements())
+          <a class="banner__navigation--catalog" href="{{ home_url('/catalog') }}">Catalog</a>
+        @endif
+        @if(get_option('pb_network_contact_form'))
+          <a class="banner__navigation--contact" href="#contact">Contact</a>
+        @endif
         @if(!is_user_logged_in())
-          <a href="{{ wp_login_url() }}">{{ __('Sign in', 'aldine') }}</a>
-          <span class="sep">/</span>
-          <a href="{{ network_home_url('/wp-signup.php') }}">{{ __('Sign up', 'aldine') }}</a>
+          <a class="banner__navigation--signin" href="{{ wp_login_url() }}">{{ __('Sign in', 'aldine') }}</a>
+          <span class="banner__navigation--sep">/</span>
+          <a class="banner__navigation--signup" href="{{ network_home_url('/wp-signup.php') }}">{{ __('Sign up', 'aldine') }}</a>
         @else
-          <a href="{{ admin_url() }}">{{ __('Admin', 'aldine') }}</a>
-          <span class="sep">/</span>
-          <a href="{{ wp_logout_url() }}">{{ __('Sign out', 'aldine') }}</a>
+          <a class="banner__navigation--admin" href="{{ admin_url() }}">{{ __('Admin', 'aldine') }}</a>
+          <span class="banner__navigation--sep">/</span>
+          <a class="banner__navigation--signout" href="{{ wp_logout_url() }}">{{ __('Sign out', 'aldine') }}</a>
         @endif
     </nav>
     <header class="banner__branding">