From bf3953d2efd7002e12426521e4b3d010391a4557 Mon Sep 17 00:00:00 2001
From: Alan Stanley <astanley@upei.ca>
Date: Wed, 26 Jun 2019 11:59:47 -0700
Subject: [PATCH] Added Checksum to view

---
 README.md             | 38 ++++++++++++++++++++++++++++++++
 composer.json         |  4 ++--
 islandora_fits.module | 51 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 91 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index dd55720d..566435f9 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,40 @@
 # Islandora FITS
 Config module to make Islandora aware of FITS microservice
+
+## Installation
+#### Install this module
+Install and enable this module in the usual way
+
+
+#### Install FITS Webservice
+FITS xmls are generated from an easily installed web service.  
+Get the latest fits.zip and fits.war from https://projects.iq.harvard.edu/fits/downloads
+(on my box I had to install a missing zip library with ‘sudo apt-get install php7.1-zip’)
+
+Install following their instructions.
+Copy the .war file to your webapps directory  and test.
+Edit the catalina.properties file on the Drupal server by adding the following two lines to the bottom of the file-
+
+fits.home=/<path-to-fits>/fits
+shared.loader=/<path-to-fits>/fits/lib/*.jar
+
+Restart Tomcat and test with 
+
+`curl -k -F datafile="@/path/to/myfile.jpg" http://example.com:8080/fits/examine`
+(note: the ‘@’ is required.)
+
+#### Installing Microservice 
+Get code from https://github.com/roblib/CrayFits and install.  This code can live anywhere, including an external server, 
+but most installations will have it at /var/www/html.
+
+The App runs by entering php bin/console server:start *:8050 in the App root folder.
+The server is stopped with php bin/console server:stop.  On a production machine you'd probably want to configure an additonal port in Apache.
+
+
+Note: The location of the fits webserver is stored in the .env file in the root dir of the Symfony app.  This will have to be reconfigured if the Fits server is anywhere other than localhost:8080/fits
+
+#### Adding FITs requests to the queue
+Copy the file `assets/ca.islandora.alpaca.connector.ocr.blueprint.xml` to `/opt/karak/deploy` on your server.  There is no need to restart.
+
+#### Adding Checksum to Display
+A pseudo field with the computed checksum can be added to Repository Item display.  Naviage to `admin/structure/types/manage/islandora_object/display` to enable or disable display of `File Checksum`.  
diff --git a/composer.json b/composer.json
index 11ebab87..9793e0be 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
-  "name": "drupal/islandora_fits",
+  "name": "islandora-rdm/islandora_fits",
   "type": "drupal-module",
-  "description": "Enables Technical Metadata derivative generation",
+  "description": "Enables Technical Metadata derivative generation.",
   "keywords": ["Drupal"],
   "license": "GPL-2.0+",
   "homepage": "https://www.drupal.org/project/islandora_fits",
diff --git a/islandora_fits.module b/islandora_fits.module
index e880a9f2..69f07a5e 100644
--- a/islandora_fits.module
+++ b/islandora_fits.module
@@ -120,5 +120,56 @@ function islandora_fits_media_insert(MediaInterface $media) {
     islandora_fits_media_update($media);
 }
 
+/**
+ * Implements hook_entity_extra_field_info().
+ */
+function islandora_fits_entity_extra_field_info() {
+    $extra = [];
+    $extra['node']['islandora_object']['display']['islandora_fits_checksum'] = array(
+        'label' => t('File Checksum'),
+        'description' => t('Checksum as discovered by FITs webservice'),
+        'weight' => 100,
+        'visible' => TRUE,
+    );
+    return $extra;
+}
+
+/**
+ * Implements hook_entity_view().
+ */
+function islandora_fits_entity_view(array &$build, $entity, $display, $view_mode) {
+    $route_match_item = \Drupal::routeMatch()->getParameters()->all();
+    $current_entity = reset($route_match_item);
+    if ($entity === $current_entity) {
+        $medias = \Drupal::entityQuery(
+            'media')
+            ->condition('field_media_of', $entity->id())
+            ->condition('bundle', 'fits_technical_metadata')
+            ->execute();
+        $mid = \reset($medias);
+        if ($mid) {
+            $fits = Media::load($mid);
+            $checksum = $fits->get('fits_ois_file_information_md5che')->value;
+            if ($checksum) {
+                $build['islandora_fits_checksum'] = [
+                    '#type' => 'container',
+                    '#attributes' => [
+                        'id' => 'field-islandora-checksum',
+                    ],
+                    'checksum' => [
+                        '#type' => 'item',
+                        '#title' => t('MD5 Checksum'),
+                        'internal_uri' => [
+                            '#type' => 'markup',
+                            '#markup' => $checksum,
+                        ],
+                    ],
+                ];
+            }
+
+        }
+    }
+}
+