Add PropertyString, cleanHtml helper and escapeHtmlExt helper.

composer.json

@@ -34,6 +34,7 @@
         "composer/package-versions-deprecated": "1.11.99.5",
         "composer/semver": "3.4.3",
         "endroid/qr-code": "5.1.0",
+        "ezyang/htmlpurifier": "4.17.0",
         "guzzlehttp/guzzle": "7.9.2",
         "jaybizzle/crawler-detect": "^1.2",
         "laminas/laminas-cache": "3.12.2",

module/VuFind/src/VuFind/Content/Summaries/Demo.php

@@ -29,6 +29,8 @@
 
 namespace VuFind\Content\Summaries;
 
+use VuFind\String\PropertyString;
+
 /**
  * Demo (fake data) summaries content loader.
  *
@@ -56,6 +58,8 @@ public function loadByIsbn($key, \VuFindCode\ISBN $isbnObj)
         return [
             'Demo summary key: ' . $key,
             'Demo summary ISBN: ' . $isbnObj->get13(),
+            (new PropertyString('Demo non-HTML summary'))
+                ->setHtml('<strong>Demo HTML Summary:</strong><ul><li>Item 1</li><li>Item 2</li></ul>'),
         ];
     }
 }

module/VuFind/src/VuFind/RecordDriver/DefaultRecord.php

@@ -1271,9 +1271,9 @@ public function getSystemDetails()
     public function getSummary()
     {
         // We need to return an array, so if we have a description, turn it into an
-        // array (it should be a flat string according to the default schema, but we
-        // might as well support the array case just to be on the safe side:
-        return (array)($this->fields['description'] ?? []);
+        // array (it is a flat string in the default Solr schema, but we also
+        // support multivalued fields for other backends):
+        return $this->getFieldAsArray('description');
     }
 
     /**
@@ -1816,4 +1816,23 @@ public function getCoordinateLabels()
     {
         return (array)($this->fields['long_lat_label'] ?? []);
     }
+
+    /**
+     * Get a field as an array
+     *
+     * @param string $field Field
+     *
+     * @return array
+     */
+    protected function getFieldAsArray(string $field): array
+    {
+        // Make sure to return only non-empty values:
+        $value = $this->fields['description'] ?? '';
+        if ('' === $value) {
+            return [];
+        }
+        // Avoid casting since description can be a PropertyString too (and casting would return an array of object
+        // properties):
+        return is_array($value) ? $value : [$value];
+    }
 }

module/VuFind/src/VuFind/String/PropertyString.php

@@ -0,0 +1,200 @@
+<?php
+
+/**
+ * Class for a string with additional properties.
+ *
+ * PHP version 8
+ *
+ * Copyright (C) The National Library of Finland 2024.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * @category VuFind
+ * @package  String
+ * @author   Ere Maijala <ere.maijala@helsinki.fi>
+ * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
+ * @link     https://vufind.org Main Site
+ */
+
+namespace VuFind\String;
+
+use function array_key_exists;
+
+/**
+ * Class for a string with additional properties.
+ *
+ * @category VuFind
+ * @package  String
+ * @author   Ere Maijala <ere.maijala@helsinki.fi>
+ * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
+ * @link     https://vufind.org Main Site
+ */
+class PropertyString implements PropertyStringInterface
+{
+    /**
+     * Constructor
+     *
+     * @param string $string     String value
+     * @param array  $properties Associative array of any additional properties. Use a custom prefix for locally
+     * defined properties. Double underscore is a reserved prefix, and currently the following keys are defined:
+     * __ids  Identifiers (e.g. subject URIs)
+     * __html HTML presentation
+     */
+    public function __construct(protected string $string, protected array $properties = [])
+    {
+    }
+
+    /**
+     * Create a PropertyString from an HTML string
+     *
+     * @param string $html       HTML
+     * @param array  $properties Any additional properties (see __construct)
+     *
+     * @return PropertyString
+     */
+    public static function fromHtml(string $html, array $properties = []): PropertyString
+    {
+        return (new PropertyString(strip_tags($html), $properties))->setHtml($html);
+    }
+
+    /**
+     * Set string value
+     *
+     * @param string $str String value
+     *
+     * @return static
+     */
+    public function setString(string $str): static
+    {
+        $this->string = $str;
+        return $this;
+    }
+
+    /**
+     * Get string value
+     *
+     * @return string
+     */
+    public function getString(): string
+    {
+        return $this->string;
+    }
+
+    /**
+     * Set HTML string
+     *
+     * @param string $html HTML
+     *
+     * @return static
+     */
+    public function setHtml(string $html): static
+    {
+        $this['__html'] = $html;
+        return $this;
+    }
+
+    /**
+     * Get HTML string
+     *
+     * Note: This could contain anything and must be sanitized for display
+     *
+     * @return ?string
+     */
+    public function getHtml(): ?string
+    {
+        return $this['__html'];
+    }
+
+    /**
+     * Set identifiers
+     *
+     * @param array $ids Identifiers
+     *
+     * @return static
+     */
+    public function setIds(array $ids): static
+    {
+        $this['__ids'] = $ids;
+        return $this;
+    }
+
+    /**
+     * Get identifiers
+     *
+     * @return ?array
+     */
+    public function getIds(): ?array
+    {
+        return $this['__ids'];
+    }
+
+    /**
+     * Check if offset exists
+     *
+     * @param mixed $offset Offset
+     *
+     * @return bool
+     */
+    public function offsetExists(mixed $offset): bool
+    {
+        return array_key_exists($offset, $this->properties);
+    }
+
+    /**
+     * Return value of offset
+     *
+     * @param mixed $offset Offset
+     *
+     * @return mixed
+     */
+    public function offsetGet(mixed $offset): mixed
+    {
+        return $this->properties[$offset] ?? null;
+    }
+
+    /**
+     * Set value of offset
+     *
+     * @param mixed $offset Offset
+     * @param mixed $value  Value
+     *
+     * @return void
+     */
+    public function offsetSet(mixed $offset, mixed $value): void
+    {
+        $this->properties[$offset] = $value;
+    }
+
+    /**
+     * Unset value of offset
+     *
+     * @param mixed $offset Offset
+     *
+     * @return void
+     */
+    public function offsetUnset(mixed $offset): void
+    {
+        unset($this->properties[$offset]);
+    }
+
+    /**
+     * Return string value
+     *
+     * @return string
+     */
+    public function __toString(): string
+    {
+        return $this->string;
+    }
+}