From 26099bf167471a31572f2246be01561b931d4a6e Mon Sep 17 00:00:00 2001
From: Mark Jordan <mjordan@sfu.ca>
Date: Tue, 18 Aug 2020 20:39:16 -0700
Subject: [PATCH] WIP on #44.

---
 src/Plugin/PluginFetchDigestFromDrupal.php    | 73 +++++++++++++++++++
 src/Plugin/PluginFetchDigestFromFedoraAPI.php |  4 +-
 2 files changed, 75 insertions(+), 2 deletions(-)
 create mode 100644 src/Plugin/PluginFetchDigestFromDrupal.php

diff --git a/src/Plugin/PluginFetchDigestFromDrupal.php b/src/Plugin/PluginFetchDigestFromDrupal.php
new file mode 100644
index 0000000..58138b4
--- /dev/null
+++ b/src/Plugin/PluginFetchDigestFromDrupal.php
@@ -0,0 +1,73 @@
+<?php
+
+/**
+ * @file
+ * Defines the class for the Riprap PluginFetchDigestFromDrupal plugin.
+ */
+
+namespace App\Plugin;
+
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\RequestException;
+
+/**
+ * Class for the Riprap PluginFetchDigestFromDrupal plugin.
+ */
+class PluginFetchDigestFromDrupal extends AbstractFetchDigestPlugin
+{
+    /**
+     * Gets the resource's digest from the REST endpoint provided by Islandora Riprap.
+     *
+     * @param string $resource_id
+     *    The file's UUID.
+     *
+     * @return string $digest
+     *   The digest value.
+     */
+    public function execute($resource_id)
+    {
+        if (isset($this->settings['fixity_algorithm'])) {
+            $this->fixity_algorithm = $this->settings['fixity_algorithm'];
+        } else {
+            $this->fixity_algorithm = 'sha1';
+        }
+
+        $client = new \GuzzleHttp\Client();
+        // @todo: Wrap in try/catch.
+
+        // @todo: Request is to /islandora_riprap/checksum/{file_uuid}/{algorithm}, not to the resource ID as with Fedora.
+        $url = $resource_id;
+        if (!strlen($url)) {
+            if ($this->logger) {
+                $this->logger->info("PluginFetchDigestFromDrupal exited due to empty resource ID.");
+            }
+            return;
+        }
+
+        $response = $client->request('GET', $url, [
+            'http_errors' => false,
+        ]);
+        $status_code = $response->getStatusCode();
+        $allowed_codes = array(200);
+        if (in_array($status_code, $allowed_codes)) {
+            $response_body = json_decode($response->getBody(), true);
+            return $response_body[0]->checksum;
+        } else {
+            // If the HTTP status code is not in the allowed list, log it.
+            $this->logger->warning("check_fixity cannot retrieve digest from Drupal.", array(
+                'resource_id' => $url,
+                'status_code' => $status_code,
+            ));
+            return false;
+        }
+
+        if ($this->event_detail) {
+            $this->event_detail->add('event_outcome_detail_note', '');
+        }
+
+        // $this->logger is null while testing.
+        if ($this->logger) {
+            $this->logger->info("PluginFetchDigestFromDrupal executed");
+        }
+    }
+}
diff --git a/src/Plugin/PluginFetchDigestFromFedoraAPI.php b/src/Plugin/PluginFetchDigestFromFedoraAPI.php
index 08eb552..c734d46 100644
--- a/src/Plugin/PluginFetchDigestFromFedoraAPI.php
+++ b/src/Plugin/PluginFetchDigestFromFedoraAPI.php
@@ -11,7 +11,7 @@
 use GuzzleHttp\Exception\RequestException;
 
 /**
- * Class for the Riprap PluginFetchDigestFromShell plugin.
+ * Class for the Riprap PluginFetchDigestFromFedoraAPI plugin.
  */
 class PluginFetchDigestFromFedoraAPI extends AbstractFetchDigestPlugin
 {
@@ -68,7 +68,7 @@ public function execute($resource_id)
             return $digest_header_value;
         } else {
             // If the HTTP status code is not in the allowed list, log it.
-            $this->logger->warning("check_fixity cannot retrieve digest from repository.", array(
+            $this->logger->warning("check_fixity cannot retrieve digest from Fedora repository.", array(
                 'resource_id' => $url,
                 'status_code' => $status_code,
             ));