[PC-1567] Allow using EDS when FOLIO fails

Merge branch 'devel-damien' into 'main'

See merge request msu-libraries/catalog/catalog!976

Author: meganschanz

vufind/module/Catalog/src/Catalog/ILS/Driver/Folio.php

@@ -81,6 +81,47 @@ public function __construct(
         $this->configReader = $configReader; // MSUL PC-1416 New param to read msul.ini
     }
 
+    /**
+     * MSUL -- Can remove once PR 4810 is in our VuFind version
+     * Initialize the driver.
+     *
+     * Check or renew our auth token
+     *
+     * @return void
+     */
+    public function init()
+    {
+        $factory = $this->sessionFactory;
+        $this->sessionCache = $factory($this->tenant);
+        $cacheType = 'session';
+        if ($this->useGlobalTokenCache()) {
+            $globalTokenData = (array)($this->getCachedData('token') ?? []);
+            if (count($globalTokenData) === 2) {
+                $cacheType = 'global';
+                [$this->sessionCache->folio_token, $this->sessionCache->folio_token_expiration] = $globalTokenData;
+            }
+        }
+        if ($this->sessionCache->folio_token ?? false) {
+            $this->token = $this->sessionCache->folio_token;
+            $this->tokenExpiration = $this->sessionCache->folio_token_expiration ?? null;
+            $this->debug(
+                'Token taken from ' . $cacheType . ' cache: ' . substr($this->token, 0, 30) . '...'
+            );
+        }
+        // MSU: added try/catch (PR 4810)
+        try {
+            if ($this->token == null) {
+                $this->renewTenantToken();
+            } else {
+                $this->checkTenantToken();
+            }
+        } catch (\Exception $e) {
+            // Errors in init() should not be fatal, it could prevent using EDS when FOLIO fails
+            $this->token = $this->tokenExpiration = null;
+            $this->logError('Failed to get a token to initialize the FOLIO driver: ' . $e->getMessage());
+        }
+    }
+
     /**
      * Given an instance object or identifer, or a holding or item identifier,
      * determine an appropriate value to use as VuFind's bibliographic ID.