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lib/pkp/classes/user/InterestManager.php

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+<?php
+
+/**
+ * @file classes/user/InterestManager.php
+ *
+ * Copyright (c) 2014-2021 Simon Fraser University
+ * Copyright (c) 2000-2021 John Willinsky
+ * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
+ *
+ * @class InterestManager
+ *
+ * @ingroup user
+ *
+ * @see InterestDAO
+ *
+ * @brief Handle user interest functions.
+ */
+
+namespace PKP\user;
+
+use PKP\db\DAORegistry;
+
+class InterestManager
+{
+    /**
+     * Constructor.
+     */
+    public function __construct()
+    {
+    }
+
+    /**
+     * Get all interests for all users in the system
+     *
+     * @param string $filter
+     *
+     * @return array
+     */
+    public function getAllInterests($filter = null)
+    {
+        $interestDao = DAORegistry::getDAO('InterestDAO'); /** @var InterestDAO $interestDao */
+        $interests = $interestDao->getAllInterests($filter);
+
+        $interestReturner = [];
+        while ($interest = $interests->next()) {
+            $interestReturner[] = $interest->getInterest();
+        }
+
+        return $interestReturner;
+    }
+
+    /**
+     * Get user reviewing interests. (Cached in memory for batch fetches.)
+     */
+    public function getInterestsForUser(User $user): array
+    {
+        static $interestsCache = [];
+        $interests = [];
+        $interestDao = DAORegistry::getDAO('InterestDAO'); /** @var InterestDAO $interestDao */
+        $interestEntryDao = DAORegistry::getDAO('InterestEntryDAO'); /** @var InterestEntryDAO $interestEntryDao */
+        $controlledVocab = $interestDao->build();
+        foreach ($interestDao->getUserInterestIds($user->getId()) as $interestEntryId) {
+            /** @var InterestEntry */
+            $interestEntry = $interestsCache[$interestEntryId] ??= $interestEntryDao->getById(
+                $interestEntryId,
+                $controlledVocab->getId()
+            );
+            if ($interestEntry) {
+                $interests[] = $interestEntry->getInterest();
+            }
+        }
+
+        return $interests;
+    }
+
+    /**
+     * Returns a comma separated string of a user's interests
+     *
+     * @param User $user
+     *
+     * @return string
+     */
+    public function getInterestsString($user)
+    {
+        $interests = $this->getInterestsForUser($user);
+
+        return implode(', ', $interests);
+    }
+
+    /**
+     * Set a user's interests
+     *
+     * @param User $user
+     */
+    public function setInterestsForUser($user, $interests)
+    {
+        $interestDao = DAORegistry::getDAO('InterestDAO'); /** @var InterestDAO $interestDao */
+        $interests = is_array($interests) ? $interests : (empty($interests) ? null : explode(',', $interests));
+        $interestDao->setUserInterests($interests, $user->getId());
+    }
+}
+
+if (!PKP_STRICT_MODE) {
+    class_alias('\PKP\user\InterestManager', '\InterestManager');
+}