Make workflow curation tasks actually work.

When curation runs, there was no "current user" and no claimed task,
so the code broke when trying to find people to notify about curation
failures.

dspace-api/src/main/java/org/dspace/curate/XmlWorkflowCuratorServiceImpl.java

@@ -13,6 +13,7 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.dspace.authorize.AuthorizeException;
 import org.dspace.content.Collection;
@@ -47,14 +48,17 @@ import org.springframework.stereotype.Service;
  * Manage interactions between curation and workflow.  A curation task can be
  * attached to a workflow step, to be executed during the step.
  *
+ * <p>
+ * <strong>NOTE:</strong> when run in workflow, curation tasks <em>run with
+ * authorization disabled</em>.
+ *
  * @see CurationTaskConfig
  * @author mwood
  */
 @Service
 public class XmlWorkflowCuratorServiceImpl
         implements XmlWorkflowCuratorService {
-    private static final Logger LOG
-            = org.apache.logging.log4j.LogManager.getLogger();
+    private static final Logger LOG = LogManager.getLogger();
 
     @Autowired(required = true)
     protected XmlWorkflowFactory workflowFactory;
@@ -97,7 +101,13 @@ public class XmlWorkflowCuratorServiceImpl
             throws AuthorizeException, IOException, SQLException {
         Curator curator = new Curator();
         curator.setReporter(reporter);
-        return curate(curator, c, wfi);
+        c.turnOffAuthorisationSystem();
+        if (null == c.getCurrentUser()) { // We need someone to email
+            c.setCurrentUser(ePersonService.findAnAdministrator(c));
+        }
+        boolean failedP = curate(curator, c, wfi);
+        c.restoreAuthSystemState();
+        return failedP;
     }
 
     @Override
@@ -123,7 +133,7 @@ public class XmlWorkflowCuratorServiceImpl
             item.setOwningCollection(wfi.getCollection());
             for (Task task : step.tasks) {
                 curator.addTask(task.name);
-                curator.curate(item);
+                curator.curate(c, item);
                 int status = curator.getStatus(task.name);
                 String result = curator.getResult(task.name);
                 String action = "none";
@@ -223,8 +233,12 @@ public class XmlWorkflowCuratorServiceImpl
             String status, String action, String message)
             throws AuthorizeException, IOException, SQLException {
         List<EPerson> epa = resolveContacts(c, task.getContacts(status), wfi);
-        if (epa.size() > 0) {
+        if (!epa.isEmpty()) {
             workflowService.notifyOfCuration(c, wfi, epa, task.name, action, message);
+        } else {
+            LOG.warn("No contacts were found for workflow item {}:  "
+                    + "task {} returned action {} with message {}",
+                    wfi.getID(), task.name, action, message);
         }
     }
 
@@ -247,8 +261,7 @@ public class XmlWorkflowCuratorServiceImpl
             // decode contacts
             if ("$flowgroup".equals(contact)) {
                 // special literal for current flowgoup
-                ClaimedTask claimedTask = claimedTaskService.findByWorkflowIdAndEPerson(c, wfi, c.getCurrentUser());
-                String stepID = claimedTask.getStepID();
+                String stepID = getFlowStep(c, wfi).step;
                 Step step;
                 try {
                     Workflow workflow = workflowFactory.getWorkflow(wfi.getCollection());
@@ -266,11 +279,13 @@ public class XmlWorkflowCuratorServiceImpl
                     epList.addAll(group.getMembers());
                 }
             } else if ("$colladmin".equals(contact)) {
+                // special literal for collection administrators
                 Group adGroup = wfi.getCollection().getAdministrators();
                 if (adGroup != null) {
                     epList.addAll(groupService.allMembers(c, adGroup));
                 }
             } else if ("$siteadmin".equals(contact)) {
+                // special literal for site administrator
                 EPerson siteEp = ePersonService.findByEmail(c,
                         configurationService.getProperty("mail.admin"));
                 if (siteEp != null) {

dspace-api/src/main/java/org/dspace/eperson/EPersonServiceImpl.java

@@ -47,6 +47,7 @@ import org.dspace.eperson.service.GroupService;
 import org.dspace.eperson.service.SubscribeService;
 import org.dspace.event.Event;
 import org.dspace.orcid.service.OrcidTokenService;
+import org.dspace.services.ConfigurationService;
 import org.dspace.util.UUIDUtils;
 import org.dspace.versioning.Version;
 import org.dspace.versioning.VersionHistory;
@@ -101,6 +102,8 @@ public class EPersonServiceImpl extends DSpaceObjectServiceImpl<EPerson> impleme
     protected VersionDAO versionDAO;
     @Autowired(required = true)
     protected ClaimedTaskService claimedTaskService;
+    @Autowired(required = true)
+    protected ConfigurationService configurationService;
     @Autowired
     protected OrcidTokenService orcidTokenService;
 
@@ -113,6 +116,21 @@ public class EPersonServiceImpl extends DSpaceObjectServiceImpl<EPerson> impleme
         return ePersonDAO.findByID(context, EPerson.class, id);
     }
 
+    @Override
+    public EPerson findAnAdministrator(Context c)
+            throws SQLException {
+        List<EPerson> contacts = groupService.findByName(c, Group.ADMIN).getMembers();
+        EPerson currentUser;
+        if (contacts.isEmpty()) {
+            log.warn("Administrators group is empty");
+            currentUser = findByEmail(c, configurationService.getProperty("mail.admin"));
+            // Null if no such EPerson
+        } else {
+            currentUser = contacts.get(0);
+        }
+        return currentUser;
+    }
+
     @Override
     public EPerson findByIdOrLegacyId(Context context, String id) throws SQLException {
         if (StringUtils.isNumeric(id)) {

dspace-api/src/main/java/org/dspace/eperson/service/EPersonService.java

@@ -157,6 +157,18 @@ public interface EPersonService extends DSpaceObjectService<EPerson>, DSpaceObje
     public List<EPerson> findAll(Context context, int sortField, int pageSize, int offset)
         throws SQLException;
 
+    /**
+     * Try very hard to find an administrator's account.  Might return a member
+     * of the Administrators group, or an account with a configured email
+     * address.
+     *
+     * @param context current DSpace session.
+     * @return a presumed administrator account, or null if none could be found.
+     * @throws SQLException
+     */
+    public EPerson findAnAdministrator(Context context)
+            throws SQLException;
+
     /**
      * Create a new eperson
      *