public async Task ProcessUpdateItemEventAsync(EventGridEvent eventToProcess, string userId)
{
// process the item type
var(updatedItem, _, operationType) = ConvertEventGridEventToCategoryItem(eventToProcess);
if (operationType != OperationType.Update)
{
return;
}
// find the category document
var categoryDocument = await CategoriesRepository.FindCategoryWithItemAsync(updatedItem.Id, updatedItem.Type, userId);
if (categoryDocument == null)
{
return;
}
// find the item in the document
var existingItem = categoryDocument.Items.SingleOrDefault(i => i.Id == updatedItem.Id);
if (existingItem == null)
{
return;
}
// update the item with the latest changes
// (the only field that can change is Preview)
existingItem.Preview = updatedItem.Preview;
await CategoriesRepository.UpdateCategoryAsync(categoryDocument);
// post a CategoryItemsUpdated event to Event Grid
var eventData = new CategoryItemsUpdatedEventData();
var subject = $"{userId}/{categoryDocument.Id}";
await EventGridPublisher.PostEventGridEventAsync(EventTypes.Categories.CategoryItemsUpdated, subject, eventData);
}
public async Task ProcessDeleteItemEventAsync(EventGridEvent eventToProcess, string userId)
{
// process the item type
var(updatedItem, _, operationType) = ConvertEventGridEventToCategoryItem(eventToProcess);
if (operationType != OperationType.Delete)
{
return;
}
// find the category document
var categoryDocument = await CategoriesRepository.FindCategoryWithItemAsync(updatedItem.Id, updatedItem.Type, userId);
if (categoryDocument == null)
{
return;
}
// find the item in the document
var itemToRemove = categoryDocument.Items.SingleOrDefault(i => i.Id == updatedItem.Id);
if (itemToRemove == null)
{
return;
}
// remove the item from the document
categoryDocument.Items.Remove(itemToRemove);
await CategoriesRepository.UpdateCategoryAsync(categoryDocument);
// post a CategoryItemsUpdated event to Event Grid
var eventData = new CategoryItemsUpdatedEventData();
var subject = $"{userId}/{categoryDocument.Id}";
await EventGridPublisher.PostEventGridEventAsync(EventTypes.Categories.CategoryItemsUpdated, subject, eventData);
}
public async Task ProcessAddItemEventAsync(EventGridEvent eventToProcess, string userId)
{
// process the item type
var(item, categoryId, operationType) = ConvertEventGridEventToCategoryItem(eventToProcess);
if (operationType != OperationType.Add)
{
return;
}
// find the category document
var categoryDocument = await CategoriesRepository.GetCategoryAsync(categoryId, userId);
if (categoryDocument == null)
{
return;
}
// update the document with the new item
// and if the item already exists in this category, replace it
var existingItem = categoryDocument.Items.SingleOrDefault(i => i.Id == item.Id);
if (existingItem != null)
{
categoryDocument.Items.Remove(existingItem);
}
categoryDocument.Items.Add(item);
await CategoriesRepository.UpdateCategoryAsync(categoryDocument);
// post a CategoryItemsUpdated event to Event Grid
var eventData = new CategoryItemsUpdatedEventData();
var subject = $"{userId}/{categoryDocument.Id}";
await EventGridPublisher.PostEventGridEventAsync(EventTypes.Categories.CategoryItemsUpdated, subject, eventData);
}