protected abstract bool IsMovedToAnotherCategory(EntityPair <Course, TCourseParseModel> coursePair);
protected abstract void AssignCategoryIdToDbEntity(EntityPair <Course, TCourseParseModel> coursePair);
protected virtual ICollection <CourseAuthorBackup> DetectCourseAuthorChanges(EntityPair <Course, TCourseParseModel> coursePair, List <AuthorResolve> authorResolves)
{
var existingCourseAuthors = coursePair.DbEntity.CourseAuthors;
var courseAuthorsParseResult = GetCourseAuthorsParseResult(coursePair.ParseModelEntity, authorResolves);
AddFullnamesakeAuthorsToResolveList(courseAuthorsParseResult.FullnamesakeAuthors);
AddNullUrlAuthorsToResolveList(courseAuthorsParseResult.NullUrlAuthors);
var processingCourseAuthorsDictionary = courseAuthorsParseResult.ValidAuthors
.ToDictionary(x => x, x => x, CourseAuthor.IdentityComparer);
var courseAuthorsBackup = new List <CourseAuthorBackup>();
foreach (var existingCourseAuthor in existingCourseAuthors)
{
CourseAuthor processingCourseAuthor;
if (processingCourseAuthorsDictionary.TryGetValue(existingCourseAuthor, out processingCourseAuthor))
{
if (existingCourseAuthor.IsAuthorCoAuthor != processingCourseAuthor.IsAuthorCoAuthor)
{
// modify
courseAuthorsBackup.Add(new CourseAuthorBackup
{
UpdateEventId = UpdateEvent.Id,
TrainingProviderId = TrainingProviderId,
CourseId = existingCourseAuthor.CourseId,
AuthorId = existingCourseAuthor.AuthorId,
IsAuthorCoAuthor = existingCourseAuthor.IsAuthorCoAuthor,
OperationType = OperationType.Modify
});
existingCourseAuthor.IsAuthorCoAuthor = processingCourseAuthor.IsAuthorCoAuthor;
}
// restore author
existingCourseAuthor.IsDeleted = false;
processingCourseAuthorsDictionary.Remove(existingCourseAuthor);
}
else
{
// remove
if (existingCourseAuthor.IsDeleted)
{
continue;
}
courseAuthorsBackup.Add(new CourseAuthorBackup
{
UpdateEventId = UpdateEvent.Id,
TrainingProviderId = TrainingProviderId,
CourseId = existingCourseAuthor.CourseId,
AuthorId = existingCourseAuthor.AuthorId,
OperationType = OperationType.Delete
});
existingCourseAuthor.IsDeleted = true;
}
}
foreach (var newCourseAuthor in processingCourseAuthorsDictionary.Values)
{
// add
courseAuthorsBackup.Add(new CourseAuthorBackup
{
UpdateEventId = UpdateEvent.Id,
TrainingProviderId = TrainingProviderId,
CourseId = newCourseAuthor.CourseId,
AuthorId = newCourseAuthor.AuthorId,
OperationType = OperationType.Add
});
existingCourseAuthors.Add(newCourseAuthor);
}
return(courseAuthorsBackup);
}