From eeaeedd2128971cbdd29307cc9e54e85384d7e1f Mon Sep 17 00:00:00 2001
From: jyhein <124268211+jyhein@users.noreply.github.com>
Date: Mon, 2 Oct 2023 11:40:26 +0300
Subject: [PATCH] pkp/pkp-lib#7272 Simultaneously Displaying Multilingual
 Metadata on the Article Landing Page

---
 pages/catalog/CatalogBookHandler.php          | 37 ++++++++++++
 plugins/themes/default/DefaultThemePlugin.php | 20 +++++++
 plugins/themes/default/locale/en/locale.po    |  6 ++
 .../styles/objects/monograph_full.less        | 31 ++++++++++
 templates/frontend/objects/monograph_full.tpl | 57 ++++++++++++-------
 5 files changed, 132 insertions(+), 19 deletions(-)

diff --git a/pages/catalog/CatalogBookHandler.php b/pages/catalog/CatalogBookHandler.php
index 320335593f8..07678da1102 100755
--- a/pages/catalog/CatalogBookHandler.php
+++ b/pages/catalog/CatalogBookHandler.php
@@ -298,6 +298,8 @@ public function book($args, $request)
             $templateMgr->addHeader('canonical', '<link rel="canonical" href="' . $url . '">');
         }
 
+        $templateMgr->assign('pubLocData', $this->getPublicationLocaleData($this->publication, $request->getContext()->getPrimaryLocale(), $submission->getData('locale'), $templateMgr->getTemplateVars('activeTheme')->getOption('showMetadata') ?: []));
+
         // Display
         if (!Hook::call('CatalogBookHandler::book', [&$request, &$submission, &$this->publication, &$this->chapter])) {
             $templateMgr->display('frontend/pages/book.tpl');
@@ -605,4 +607,39 @@ protected function getChaptersFirstPublishedDate(Submission $submission, Chapter
 
         return null;
     }
+
+    /**
+     * For book details, format display data.
+     */
+    protected function getPublicationLocaleData(\APP\publication\Publication $publication, string $contextPrimaryLocale, string $submissionLocale, array $metadataOpts): array
+    {
+        $titles = array_filter($publication->getFullTitles('html'));
+        $primaryLocale = isset($titles[$contextPrimaryLocale]) ? $contextPrimaryLocale : $submissionLocale;
+        $uiLocale = $contextPrimaryLocale;
+        $getMData = fn ($opt) => empty(count($mdata = array_filter($publication->getData($opt) ?? []))) || in_array($opt, $metadataOpts)
+        ? $mdata
+        : (isset($mdata[$primaryLocale]) ? [$primaryLocale => $mdata[$primaryLocale]] : [$fk = array_key_first($mdata) => $mdata[$fk]]);
+
+        $pubLocData = [
+            'titles' => ['text' => in_array('title', $metadataOpts) ? array_filter($titles, fn ($locale) => $locale !== $primaryLocale, ARRAY_FILTER_USE_KEY) : []],
+            'keywords' => ['text' => $getMData('keywords')],
+            'abstract' => ['text' => $getMData('abstract')],
+        ];
+
+        foreach($pubLocData as $opt => &$item) {
+            uksort($item['text'], fn ($a, $b) => $a === $primaryLocale ? -1 : ($b === $primaryLocale ? 1 : ($a < $b ? -1 : 1)));
+
+            $locales = array_keys($item['text']);
+            $hasSameHeaderLocale = in_array($opt, $metadataOpts);
+            $item['header'] = [];
+            foreach($locales as $locale) {
+                $item['header'][$locale] = $hasSameHeaderLocale ? $locale : $uiLocale;
+            }
+        }
+
+        $pubLocData['primaryTitle'] = $titles[$primaryLocale];
+        $pubLocData['primaryLocale'] = $primaryLocale;
+
+        return $pubLocData;
+    }
 }
diff --git a/plugins/themes/default/DefaultThemePlugin.php b/plugins/themes/default/DefaultThemePlugin.php
index 56b1ad7a204..91d736e40ba 100644
--- a/plugins/themes/default/DefaultThemePlugin.php
+++ b/plugins/themes/default/DefaultThemePlugin.php
@@ -126,6 +126,26 @@ public function init()
             'default' => 'none',
         ]);
 
+        $this->addOption('showMetadata', 'FieldOptions', [
+            'label' => __('plugins.themes.default.option.metadata.label'),
+            'description' => __('plugins.themes.default.option.metadata.description'),
+            'options' => [
+                [
+                    'value' => 'title',
+                    'label' => __('submission.title'),
+                ],
+                [
+                    'value' => 'keywords',
+                    'label' => __('common.keywords'),
+                ],
+                [
+                    'value' => 'abstract',
+                    'label' => __('submission.synopsis'),
+                ],
+            ],
+            'default' => [],
+        ]);
+
         // Load primary stylesheet
         $this->addStyle('stylesheet', 'styles/index.less');
 
diff --git a/plugins/themes/default/locale/en/locale.po b/plugins/themes/default/locale/en/locale.po
index cd597a3564f..551476e6a95 100644
--- a/plugins/themes/default/locale/en/locale.po
+++ b/plugins/themes/default/locale/en/locale.po
@@ -95,3 +95,9 @@ msgstr "Downloads"
 
 msgid "plugins.themes.default.displayStats.noStats"
 msgstr "Download data is not yet available."
+
+msgid "plugins.themes.default.option.metadata.label"
+msgstr "Show submission metadata on the book landing page"
+
+msgid "plugins.themes.default.option.metadata.description"
+msgstr "Select the metadata to show in an books's other languages."
diff --git a/plugins/themes/default/styles/objects/monograph_full.less b/plugins/themes/default/styles/objects/monograph_full.less
index 057bc84e016..54d585993da 100644
--- a/plugins/themes/default/styles/objects/monograph_full.less
+++ b/plugins/themes/default/styles/objects/monograph_full.less
@@ -22,6 +22,20 @@
 		margin-bottom: @quadruple;
 	}
 
+	> .locale_titles {
+		margin: @double 0 @triple 0;
+
+		> p {
+			font-size: @font-base;
+			margin-top: 0;
+			margin-bottom: @half;
+
+			&:last-of-type {
+				margin-bottom: 0;
+			}
+		}
+	}
+
 	.main_entry {
 
 		.item {
@@ -30,6 +44,23 @@
 			&:first-child {
 				padding-top: 0;
 			}
+
+
+			&.keywords > div {
+				margin-bottom: @triple;
+
+				&:last-of-type {
+					margin-bottom: 0;
+				}
+			}
+
+			&.abstracts .abstract {
+				margin-bottom: @quadruple;
+
+				&:last-of-type {
+					margin-bottom: 0;
+				}
+			}
 		}
 
 		.label {
diff --git a/templates/frontend/objects/monograph_full.tpl b/templates/frontend/objects/monograph_full.tpl
index b00a5ab5af9..c8616607d1e 100644
--- a/templates/frontend/objects/monograph_full.tpl
+++ b/templates/frontend/objects/monograph_full.tpl
@@ -71,6 +71,7 @@
  * @uses $licenseUrl string The URL which provides license information.
  * @uses $ccLicenseBadge string An HTML string containing a CC license image and
  *       text. Only appears when license URL matches a known CC license.
+ * @uses $pubLocData array Array of formatted publication locale metadata: titles, abstracts, keywords,
  *}
 <div class="obj_monograph_full">
 
@@ -93,10 +94,20 @@
 		</div>
 	{/if}
 
-	<h1 class="title">
-		{$publication->getLocalizedFullTitle(null, 'html')|strip_unsafe_html}
+	<h1 class="title" lang="{$pubLocData.primaryLocale|replace:"_":"-"}">
+		{$pubLocData.primaryTitle|strip_unsafe_html}
 	</h1>
 
+	{if !empty(count($pubLocData.titles.text))}
+		<div class="locale_titles">
+		{foreach from=$pubLocData.titles.text key=locale item=title}
+			<p lang="{$locale|replace:"_":"-"}">
+				{$title|strip_unsafe_html}
+			</p>
+		{/foreach}
+		</div>
+	{/if}
+
 	<div class="row">
 		<div class="main_entry">
 
@@ -120,29 +131,37 @@
 			{/if}
 
 			{* Keywords *}
-			{if !empty($publication->getLocalizedData('keywords'))}
+			{if !empty(count($pubLocData.keywords.text))}
 				<div class="item keywords">
-					<h2 class="label">
-						{capture assign=translatedKeywords}{translate key="common.keywords"}{/capture}
-						{translate key="semicolon" label=$translatedKeywords}
-					</h2>
-					<span class="value">
-					{foreach name="keywords" from=$publication->getLocalizedData('keywords') item=keyword}
-						{$keyword|escape}{if !$smarty.foreach.keywords.last}, {/if}
-					{/foreach}
-				</span>
+				{foreach from=$pubLocData.keywords.text key=locale item=keywords}
+					<div>
+						<h2 class="label" lang="{$pubLocData.keywords.header[$locale]|replace:"_":"-"}">
+							{capture assign=translatedKeywords}{translate key="common.keywords" locale=$pubLocData.keywords.header[$locale]}{/capture}
+							{translate key="semicolon" label=$translatedKeywords locale=$pubLocData.keywords.header[$locale]}
+						</h2>
+						<span class="value" lang="{$locale|replace:"_":"-"}">
+						{foreach name="keywords" from=$keywords item="keyword"}
+							{$keyword|escape}{if !$smarty.foreach.keywords.last}{translate key="common.commaListSeparator" locale=$pubLocData.keywords.header[$locale]}{/if}
+						{/foreach}
+						</span>
+					</div>
+				{/foreach}
 				</div>
 			{/if}
 
 			{* Abstract *}
-			<div class="item abstract">
-				<h2 class="label">
-					{translate key="submission.synopsis"}
-				</h2>
-				<div class="value">
-					{$publication->getLocalizedData('abstract')|strip_unsafe_html}
+			{if !empty(count($pubLocData.abstract.text))}
+				<div class="item abstracts">
+				{foreach from=$pubLocData.abstract.text key=locale item=abstract}
+					<div class="abstract">
+						<h2 class="label" lang="{$pubLocData.abstract.header[$locale]|replace:"_":"-"}">
+							{translate key="submission.synopsis" locale=$pubLocData.abstract.header[$locale]}
+						</h2>
+						<span lang="{$locale|replace:"_":"-"}">{$abstract|strip_unsafe_html}</span>
+					</div>
+				{/foreach}
 				</div>
-			</div>
+			{/if}
 
 			{* Chapters *}
 			{if $chapters|@count}