/// <summary>
/// Verify the UI template can be saved.
/// </summary>
/// <param name="invalidReason">A message describing why the validation failed. Set to <see cref="String.Empty" /> when
/// validation succeeds.</param>
/// <returns><c>true</c> if business rules for saving are satisfied, <c>false</c> otherwise</returns>
private bool ValidateUiTemplateBeforeSave(out string invalidReason)
{
// TEST 1: Cannot save changes to the default template.
if (CurrentUiTemplate.Name.Equals("Default", StringComparison.OrdinalIgnoreCase))
{
var htmlHasChanged = !CurrentUiTemplate.HtmlTemplate.Equals(txtTemplate.Text, StringComparison.Ordinal);
var scriptHasChanged = !CurrentUiTemplate.ScriptTemplate.Equals(txtScript.Text, StringComparison.Ordinal);
if (htmlHasChanged || scriptHasChanged)
{
invalidReason = Resources.GalleryServer.Admin_Templates_Cannot_Modify_Default_Tmpl_Msg;
return(false);
}
}
// TEST 2: Verify no other template has the same name in this category.
var tmpl = (from t in UiTemplates
where t.TemplateType == CurrentUiTemplate.TemplateType &&
t.GalleryId == GalleryId &&
t.Name == txtTemplateName.Text &&
t.UiTemplateId != CurrentUiTemplate.UiTemplateId
select t).FirstOrDefault();
if (tmpl != null)
{
invalidReason = Resources.GalleryServer.Admin_Templates_Cannot_Save_Duplicate_Name_Msg;
return(false);
}
// TEST 3: Verify user isn't removing the last template from the root album.
var rootAlbumId = Factory.LoadRootAlbumInstance(GalleryId).Id;
var curTmplNotAssignedToRootAlbum = !tvUC.SelectedAlbumIds.Contains(rootAlbumId); // Need to use tvUC.SelectedAlbumIds instead of CurrentUiTemplate.RootAlbumIds because CurrentUiTemplate has not yet been unbound
var noOtherTmplAssignedToRootAlbum = !UiTemplates.Any(t => t.TemplateType == CurrentUiTemplate.TemplateType && t.UiTemplateId != CurrentUiTemplate.UiTemplateId && t.RootAlbumIds.Contains(rootAlbumId));
if (curTmplNotAssignedToRootAlbum && noOtherTmplAssignedToRootAlbum)
{
invalidReason = Resources.GalleryServer.Admin_Templates_Cannot_Save_No_Tmpl_Msg;
return(false);
}
// TEST 4: The default template cannot be renamed to something else.
if (CurrentUiTemplate.Name.Equals("Default", StringComparison.OrdinalIgnoreCase) && !txtTemplateName.Text.Equals("Default", StringComparison.OrdinalIgnoreCase))
{
invalidReason = Resources.GalleryServer.Admin_Templates_Cannot_Save_No_Default_Tmpl_Msg;
return(false);
}
// All the tests pass, so return true.
invalidReason = String.Empty;
return(true);
}
/// <summary>
/// Verify the UI template can be deleted.
/// </summary>
/// <param name="invalidReason">A message describing why the validation failed. Set to <see cref="String.Empty" /> when
/// validation succeeds.</param>
/// <returns><c>true</c> if business rules for deleting are satisfied, <c>false</c> otherwise</returns>
private bool ValidateUiTemplateBeforeDelete(out string invalidReason)
{
// TEST 1: Cannot delete the default template.
if (CurrentUiTemplate.Name.Equals("Default", StringComparison.OrdinalIgnoreCase))
{
invalidReason = Resources.GalleryServer.Admin_Templates_Cannot_Modify_Default_Tmpl_Msg;
return(false);
}
// TEST 2: Cannot delete a template if it leaves one ore more albums without a template
var rootAlbumId = Factory.LoadRootAlbumInstance(GalleryId).Id;
var noOtherTmplAssignedToRootAlbum = !UiTemplates.Any(t => t.TemplateType == CurrentUiTemplate.TemplateType && t.UiTemplateId != CurrentUiTemplate.UiTemplateId && t.RootAlbumIds.Contains(rootAlbumId));
if (noOtherTmplAssignedToRootAlbum)
{
invalidReason = Resources.GalleryServer.Admin_Templates_Cannot_Delete_No_Tmpl_Msg;
return(false);
}
// All the tests pass, so return true.
invalidReason = String.Empty;
return(true);
}
