[#607] Allow to reactivate deleted datasets

Currently if a dataset is deleted and users navigate to the edit form,
there is no state field and the delete button is still shown.

After this change, the state dropdown is shown if the dataset state is
not active, and the delete button is not shown.

ckan/templates/package/snippets/package_basic_fields.html

@@ -99,4 +99,17 @@
     </div>
   {% endif %}
 
+
+  {% if data.id and h.check_access('package_delete', {'id': data.id}) and data.state != 'active' %}
+    <div class="control-group">
+      <label for="field-state" class="control-label">{{ _('State') }}</label>
+      <div class="controls">
+        <select id="field-state" name="state">
+          <option value="active" {% if data.get('state', 'none') == 'active' %} selected="selected" {% endif %}>{{ _('Active') }}</option>
+          <option value="deleted" {% if data.get('state', 'none') == 'deleted' %} selected="selected" {% endif %}>{{ _('Deleted') }}</option>
+        </select>
+      </div>
+    </div>
+  {% endif %}
+
 {% endblock %}

ckan/templates/package/snippets/package_form.html

@@ -33,7 +33,7 @@
         </p>
       {% endblock %}
       {% block delete_button %}
-        {% if h.check_access('package_delete', {'id': data.id})  %}
+        {% if h.check_access('package_delete', {'id': data.id}) and not data.state == 'deleted' %}
           {% set locale = h.dump_json({'content': _('Are you sure you want to delete this dataset?')}) %}
           <a class="btn btn-danger pull-left" href="{% url_for controller='package', action='delete', id=data.id %}" data-module="confirm-action" data-module-i18n="{{ locale }}">{% block delete_button_text %}{{ _('Delete') }}{% endblock %}</a>
         {% endif %}