In our case UGC items are levels created by players. We want other player's to be able to "like" them. That means that we need to find a way to:
Increment "likes" count on UGC item(level), after a player "likes" it.
Check if player already liked that level(to prevent him from incrementing like count more than once)
Get the list of all levels player liked.
How can we do this by using Playfab?
In fact, PlayFab has provided a rating system which can help you evaluate the UGC items, please refer to Adding ratings to your content - PlayFab | Microsoft Learn for more details. In your case, you want to implement the "Like" feature for the UGC items, as a workaround, you can implement this feature based on the rating system we provide. When the players want to like an item, they can call the API ReviewItem to create a review for this item, and after that they can call API GetItemReviewSummary to see how many people like the item by checking the “ReviewsCount”. Please note that the summary ratings data is cached with update data coming within 15 minutes. And as Adding ratings to your content - PlayFab | Microsoft Learn mentions that ratings and reviews are attached to the player calling the API and only a single review per player can be associated with an item, so you don't have to worry about players liking the same item multiple times. And if the players want to retrieve the list of items they liked previously, they can call the API UpdateUserData to save the item id of the liked items to the user data after liking the item, after that they can call the API GetUserData to retrieve the item they liked before.
That makes sense. We were thinking about that solution but we wanted to hear your opinion. Since we expect a decent amount of traffic we want to make sure that we’re doing it the right way!
And what about getting levels with most likes? I suppose we would have to do that with search, but what should we put in order by, since it’s the number of ratings that’s important?
Also is it possible to put the number of ratings in search requests select, so that we get the number of likes(ratings) immediately with search?
You should be able to use the counts in the Rating object to answer questions like "best rated" and "most liked". You should be able to Filter or OrderBy the properties to get the view you want.
If you're using the SearchItems API, expect to see aggregation latency as described here.
That's really helpful, thank you! And is there a way to get all items player made a review for?
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