Revert "[2.2-develop] Update Gallery Template to handle boolean config Variables"

This reverts commit 8ef039e.

Author: gwharton

app/code/Magento/Catalog/view/frontend/templates/product/view/gallery.phtml

@@ -47,11 +47,21 @@
                 "data": <?= /* @escapeNotVerified */ $block->getGalleryImagesJson() ?>,
                 "options": {
                     "nav": "<?= /* @escapeNotVerified */ $block->getVar("gallery/nav") ?>",
-                    "loop": <?= /* @escapeNotVerified */ $block->getVar("gallery/loop") ? 'true' : 'false' ?>,
-                    "keyboard": <?= /* @escapeNotVerified */ $block->getVar("gallery/keyboard") ? 'true' : 'false' ?>,
-                    "arrows": <?= /* @escapeNotVerified */ $block->getVar("gallery/arrows") ? 'true' : 'false' ?>,
-                    "allowfullscreen": <?= /* @escapeNotVerified */ $block->getVar("gallery/allowfullscreen") ? 'true' : 'false' ?>,
-                    "showCaption": <?= /* @escapeNotVerified */ $block->getVar("gallery/caption") ? 'true' : 'false' ?>,
+                    <?php if (($block->getVar("gallery/loop"))): ?>
+                        "loop": <?= /* @escapeNotVerified */ $block->getVar("gallery/loop") ?>,
+                    <?php endif; ?>
+                    <?php if (($block->getVar("gallery/keyboard"))): ?>
+                        "keyboard": <?= /* @escapeNotVerified */ $block->getVar("gallery/keyboard") ?>,
+                    <?php endif; ?>
+                    <?php if (($block->getVar("gallery/arrows"))): ?>
+                        "arrows": <?= /* @escapeNotVerified */ $block->getVar("gallery/arrows") ?>,
+                    <?php endif; ?>
+                    <?php if (($block->getVar("gallery/allowfullscreen"))): ?>
+                        "allowfullscreen": <?= /* @escapeNotVerified */ $block->getVar("gallery/allowfullscreen") ?>,
+                    <?php endif; ?>
+                    <?php if (($block->getVar("gallery/caption"))): ?>
+                        "showCaption": <?= /* @escapeNotVerified */ $block->getVar("gallery/caption") ?>,
+                    <?php endif; ?>
                     "width": "<?= /* @escapeNotVerified */ $block->getImageAttribute('product_page_image_medium', 'width') ?>",
                     "thumbwidth": "<?= /* @escapeNotVerified */ $block->getImageAttribute('product_page_image_small', 'width') ?>",
                     <?php if ($block->getImageAttribute('product_page_image_small', 'height') || $block->getImageAttribute('product_page_image_small', 'width')): ?>
@@ -69,18 +79,28 @@
                         "transitionduration": <?= /* @escapeNotVerified */ $block->getVar("gallery/transition/duration") ?>,
                     <?php endif; ?>
                     "transition": "<?= /* @escapeNotVerified */ $block->getVar("gallery/transition/effect") ?>",
-                    "navarrows": <?= /* @escapeNotVerified */ $block->getVar("gallery/navarrows") ? 'true' : 'false' ?>,
+                    <?php if (($block->getVar("gallery/navarrows"))): ?>
+                        "navarrows": <?= /* @escapeNotVerified */ $block->getVar("gallery/navarrows") ?>,
+                    <?php endif; ?>
                     "navtype": "<?= /* @escapeNotVerified */ $block->getVar("gallery/navtype") ?>",
                     "navdir": "<?= /* @escapeNotVerified */ $block->getVar("gallery/navdir") ?>"
                 },
                 "fullscreen": {
                     "nav": "<?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/nav") ?>",
-                    "loop": <?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/loop") ? 'true' : 'false' ?>,
+                    <?php if ($block->getVar("gallery/fullscreen/loop")): ?>
+                        "loop": <?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/loop") ?>,
+                    <?php endif; ?>
                     "navdir": "<?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/navdir") ?>",
-                    "navarrows": <?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/navarrows") ? 'true' : 'false' ?>,
+                    <?php if ($block->getVar("gallery/transition/navarrows")): ?>
+                        "navarrows": <?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/navarrows") ?>,
+                    <?php endif; ?>
                     "navtype": "<?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/navtype") ?>",
-                    "arrows": <?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/arrows") ? 'true' : 'false' ?>,
-                    "showCaption": <?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/caption") ? 'true' : 'false' ?>,
+                    <?php if ($block->getVar("gallery/fullscreen/arrows")): ?>
+                        "arrows": <?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/arrows") ?>,
+                    <?php endif; ?>
+                    <?php if ($block->getVar("gallery/fullscreen/caption")): ?>
+                        "showCaption": <?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/caption") ?>,
+                    <?php endif; ?>
                     <?php if ($block->getVar("gallery/fullscreen/transition/duration")): ?>
                         "transitionduration": <?= /* @escapeNotVerified */ $block->getVar("gallery/fullscreen/transition/duration") ?>,
                     <?php endif; ?>