Made errors on Library blocks use validate functionality.

common/lib/xmodule/xmodule/library_content_module.py

@@ -14,6 +14,7 @@ from xblock.core import XBlock
 from xblock.fields import Scope, String, List, Integer, Boolean
 from xblock.fragment import Fragment
 from xmodule.modulestore.exceptions import ItemNotFoundError
+from xmodule.validation import StudioValidationMessage, StudioValidation
 from xmodule.x_module import XModule, STUDENT_VIEW
 from xmodule.studio_editable import StudioEditableModule, StudioEditableDescriptor
 from .xml_module import XmlDescriptor
@@ -260,6 +261,40 @@ class LibraryContentModule(LibraryContentFields, XModule, StudioEditableModule):
         }))
         return fragment
 
+    def validate(self):
+        """
+        Validates the state of this Library Content Module Instance. This
+        is the override of the general XBlock method, and it will also ask
+        its superclass to validate.
+        """
+        validation = super(LibraryContentModule, self).validate()
+        if not isinstance(validation, StudioValidation):
+            validation = StudioValidation.copy(validation)
+        if not self.source_libraries:
+            validation.set_summary(
+                StudioValidationMessage(
+                    StudioValidationMessage.NOT_CONFIGURED,
+                    _(u"A library has not yet been selected."),
+                    action_class='edit-button',
+                    action_label=_(u"Select a Library")
+                )
+            )
+            return validation
+        for library_key, version in self.source_libraries:  # pylint: disable=unused-variable
+            library = _get_library(self.runtime.descriptor_runtime.modulestore, library_key)
+            if library is None:
+                validation.set_summary(
+                    StudioValidationMessage(
+                        StudioValidationMessage.ERROR,
+                        _(u'Library is invalid, corrupt, or has been deleted.'),
+                        action_class='edit-button',
+                        action_label=_(u"Edit Library List")
+                    )
+                )
+                break
+
+        return validation
+
     def author_view(self, context):
         """
         Renders the Studio views.
@@ -284,41 +319,31 @@ class LibraryContentModule(LibraryContentFields, XModule, StudioEditableModule):
                     _('No matching content found in library, no library configured, or not yet loaded from library.')
                 ))
         else:
-            # When shown on a unit page, don't show any sort of preview - just the status of this block.
-            LibraryStatus = enum(  # pylint: disable=invalid-name
-                NONE=0,  # no library configured
-                INVALID=1,  # invalid configuration or library has been deleted/corrupted
-                OK=2,  # library configured correctly and should be working fine
-            )
             UpdateStatus = enum(  # pylint: disable=invalid-name
                 CANNOT=0,  # Cannot update - library is not set, invalid, deleted, etc.
                 NEEDED=1,  # An update is needed - prompt the user to update
                 UP_TO_DATE=2,  # No update necessary - library is up to date
             )
+            # When shown on a unit page, don't show any sort of preview - just the status of this block.
+            library_ok = bool(self.source_libraries)  # True if at least one source library is defined
             library_names = []
-            library_status = LibraryStatus.OK
             update_status = UpdateStatus.UP_TO_DATE
-            if self.source_libraries:
             for library_key, version in self.source_libraries:
                 library = _get_library(self.runtime.descriptor_runtime.modulestore, library_key)
                 if library is None:
-                        library_status = LibraryStatus.INVALID
                     update_status = UpdateStatus.CANNOT
+                    library_ok = False
                     break
                 library_names.append(library.display_name)
                 latest_version = library.location.library_key.version_guid
                 if version is None or version != latest_version:
                     update_status = UpdateStatus.NEEDED
-                    # else library is up to date.
-            else:
-                library_status = LibraryStatus.NONE
-                update_status = UpdateStatus.CANNOT
+
             fragment.add_content(self.system.render_template('library-block-author-view.html', {
-                'library_status': library_status,
-                'LibraryStatus': LibraryStatus,
-                'update_status': update_status,
-                'UpdateStatus': UpdateStatus,
                 'library_names': library_names,
+                'library_ok': library_ok,
+                'UpdateStatus': UpdateStatus,
+                'update_status': update_status,
                 'max_count': self.max_count,
                 'mode': self.mode,
                 'num_children': len(self.children),  # pylint: disable=no-member

lms/templates/library-block-author-view.html

@@ -2,16 +2,12 @@
 from django.utils.translation import ugettext as _
 %>
 <div class="xblock-header-secondary">
-    % if library_status == LibraryStatus.OK:
+    % if library_ok:
         <p>${_('This component will be replaced by {mode} {max_count} components from the {num_children} matching components from {lib_names}.').format(mode=mode, max_count=max_count, num_children=num_children, lib_names=', '.join(library_names))}</p>
         % if update_status == UpdateStatus.NEEDED:
             <p><strong>${_('This component is out of date.')}</strong> <a href="#" class="library-update-btn">↻ ${_('Update now with latest components from the library')}</a></p>
         % elif update_status == UpdateStatus.UP_TO_DATE:
             <p>${_(u'✓ Up to date.')}</p>
         % endif
-    % elif library_status == LibraryStatus.NONE:
-        <p>${_('No library or filters configured. Press "Edit" to configure.')}</p>
-    % else:
-        <p>${_('Library is invalid, corrupt, or has been deleted.')}</p>
     % endif
 </div>