navigation/dashboard.phtml: Use ipl-web's Icon for fa- icons (#5278)

resolves #5277

application/views/scripts/navigation/dashboard.phtml

@@ -1,5 +1,6 @@
 <?php
 
+use ipl\Stdlib\Str;
 use ipl\Web\Widget\Icon;
 
 ?>
@@ -11,7 +12,7 @@ use ipl\Web\Widget\Icon;
     <a class="dashboard-link" href="<?= $this->url($item->getUrl(), $item->getUrlParameters()) ?>"<?= $this->propertiesToString($item->getAttributes()) ?>>
         <div class="link-icon">
         <?php
-            if (substr($item->getUrl()->getPath(), 0, 9) === 'icingadb/') {
+            if (Str::startsWith($item->getIcon(), 'fa-') || substr($item->getUrl()->getPath(), 0, 9) === 'icingadb/') {
                 echo new Icon($item->getIcon() ?: 'share', [ 'aria-hidden' => 1]);
             } else {
                 echo $this->icon($item->getIcon() ?: 'forward', null, array('aria-hidden' => true));

library/Icinga/Web/View.php

@@ -61,6 +61,154 @@ class View extends Zend_View_Abstract
      */
     const CHARSET = 'UTF-8';
 
+    /**
+     * Legacy icons provided by our old fontello font
+     *
+     * @var array<string, bool>
+     */
+    private const LEGACY_ICONS = [
+        //<editor-fold desc="Icon names">
+        'dashboard' => true,
+        'user' => true,
+        'users' => true,
+        'ok' => true,
+        'cancel' => true,
+        'plus' => true,
+        'minus' => true,
+        'folder-empty' => true,
+        'download' => true,
+        'upload' => true,
+        'git' => true,
+        'cubes' => true,
+        'database' => true,
+        'gauge' => true,
+        'sitemap' => true,
+        'sort-name-up' => true,
+        'sort-name-down' => true,
+        'megaphone' => true,
+        'bug' => true,
+        'tasks' => true,
+        'filter' => true,
+        'off' => true,
+        'book' => true,
+        'paste' => true,
+        'scissors' => true,
+        'globe' => true,
+        'cloud' => true,
+        'flash' => true,
+        'barchart' => true,
+        'down-dir' => true,
+        'up-dir' => true,
+        'left-dir' => true,
+        'right-dir' => true,
+        'down-open' => true,
+        'right-open' => true,
+        'up-open' => true,
+        'left-open' => true,
+        'up-big' => true,
+        'right-big' => true,
+        'left-big' => true,
+        'down-big' => true,
+        'resize-full-alt' => true,
+        'resize-full' => true,
+        'resize-small' => true,
+        'move' => true,
+        'resize-horizontal' => true,
+        'resize-vertical' => true,
+        'zoom-in' => true,
+        'block' => true,
+        'zoom-out' => true,
+        'lightbulb' => true,
+        'clock' => true,
+        'volume-up' => true,
+        'volume-down' => true,
+        'volume-off' => true,
+        'mute' => true,
+        'mic' => true,
+        'endtime' => true,
+        'starttime' => true,
+        'calendar-empty' => true,
+        'calendar' => true,
+        'wrench' => true,
+        'sliders' => true,
+        'services' => true,
+        'service' => true,
+        'phone' => true,
+        'file-pdf' => true,
+        'file-word' => true,
+        'file-excel' => true,
+        'doc-text' => true,
+        'trash' => true,
+        'comment-empty' => true,
+        'comment' => true,
+        'chat' => true,
+        'chat-empty' => true,
+        'bell' => true,
+        'bell-alt' => true,
+        'attention-alt' => true,
+        'print' => true,
+        'edit' => true,
+        'forward' => true,
+        'reply' => true,
+        'reply-all' => true,
+        'eye' => true,
+        'tag' => true,
+        'tags' => true,
+        'lock-open-alt' => true,
+        'lock-open' => true,
+        'lock' => true,
+        'home' => true,
+        'info' => true,
+        'help' => true,
+        'search' => true,
+        'flapping' => true,
+        'rewind' => true,
+        'chart-line' => true,
+        'bell-off' => true,
+        'bell-off-empty' => true,
+        'plug' => true,
+        'eye-off' => true,
+        'arrows-cw' => true,
+        'cw' => true,
+        'host' => true,
+        'thumbs-up' => true,
+        'thumbs-down' => true,
+        'spinner' => true,
+        'attach' => true,
+        'keyboard' => true,
+        'menu' => true,
+        'wifi' => true,
+        'moon' => true,
+        'chart-pie' => true,
+        'chart-area' => true,
+        'chart-bar' => true,
+        'beaker' => true,
+        'magic' => true,
+        'spin6' => true,
+        'down-small' => true,
+        'left-small' => true,
+        'right-small' => true,
+        'up-small' => true,
+        'pin' => true,
+        'angle-double-left' => true,
+        'angle-double-right' => true,
+        'circle' => true,
+        'info-circled' => true,
+        'twitter' => true,
+        'facebook-squared' => true,
+        'gplus-squared' => true,
+        'attention-circled' => true,
+        'check' => true,
+        'reschedule' => true,
+        'warning-empty' => true,
+        'th-list' => true,
+        'th-thumb-empty' => true,
+        'github-circled' => true,
+        'history' => true,
+        'binoculars' => true
+        //</editor-fold>
+    ];
+
     /**
      * Registered helper functions
      */

library/Icinga/Web/View/helpers/url.php

@@ -5,6 +5,7 @@ namespace Icinga\Web\View;
 
 use Icinga\Web\Url;
 use Icinga\Exception\ProgrammingError;
+use ipl\Web\Widget\Icon;
 
 $view = $this;
 
@@ -108,6 +109,12 @@ $this->addHelperFunction('icon', function ($img, $title = null, array $propertie
         $properties['aria-hidden'] = 'true';
     }
 
+    if (! isset($view::LEGACY_ICONS[$img]) || substr($img, 0, 3) === 'fa-') {
+        // This may not be reached, as some legacy icons have equal names as fontawesome ones.
+        // Though, this is a legacy helper, so in that case one gets legacy icons...
+        return new Icon($img, $properties);
+    }
+
     if (isset($properties['class'])) {
         $properties['class'] .= ' icon-' . $img;
     } else {