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Displaying people from the People System

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This topic describes the code flow to display people by using the People System. Here are some example call flow scenarios that show how titles get data from services that are related to People.

Services across Xbox Live return only data owned by that service and return only XUID references to users. Here are some examples.

  • The People service only owns and returns the XUIDs that are on a user's People List and some very basic information about each of those XUIDs (like favorite status).
  • The Presence service owns data about the online status information of XUIDs.
  • The Leaderboards service owns ranking information on lists of XUIDs.

To render lists of people in experiences, you must call multiple services. This is because display name and gamertag information is never returned from any service other than the Profile service.

The general calling pattern for the service APIs is to make one round trip to first get a list of XUIDs from the service that can best filter or sort the list, and then make simultaneous round-trip calls to other services as needed to get any additional metadata that's required for each XIUD. For images, a third round trip of calls might be required to get images from the image URLs.

To reduce the number of round trips that are required to get data about a user's People List, a People moniker has been introduced to relevant services. This feature allows callers to abstractly express to the primary service that it should get the list of the user's People from the People service, and then use that set of XUIDs to scope the return.

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List of users currently in the game

Title has:

List of random XUIDs of other users in the game.

Goal:

To render minimal information for each of the other users.

Field to render [owning service]:

GameDisplayName [Profile]

Call flow:

Call Profile with the list of XUIDs.

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List of the current user's People who are online

Title has:

The current user's XUID.

Goal:

To render a rich list of online users that are in the current user's People List.

Field to render [owning service]:

  • Favorite indicator [People]
  • Display picture [Profile]
  • GameDisplayName [Profile]
  • Basic online status (green circle) [Presence]

Call flow:

  1. Call Presence, passing in the People moniker to get the XUIDs and online status for each of the user's People.
  2. In parallel:
    1. Call Profile, passing in the entire list of XUIDs to get the display name and picture URL for each. Then, get images for each picture URL.
    2. Call People, passing in the list of XUIDs to find out if any are favorites of the user.

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Global leaderboard that contains random users

Title has:

The ID/name of the leaderboard.

Goal:

To render basic information for each user on the leaderboard.

Field to render [owning service]:

  • Favorite indicator [People]
  • GameDisplayName [Profile]
  • Rank [Leaderboards]
  • Score [Leaderboards]

Call flow:

  1. Call Leaderboards to get the XUIDs, rank, and scores for the particular leaderboard.
  2. In parallel:
    • Call Profile, passing in the list of XUIDs to get the display name and picture URL for each.
    • Call People, passing in the list of XUIDs to find out if any are favorites of the user.

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Leaderboard of user's People

Title has:

  • The ID/name of the leaderboard
  • The current user's XUID

Goal:

To render basic information for each user on the leaderboard.

Field to render [owning service]:

  • Favorite indicator [People]
  • GameDisplayName [Profile]
  • Rank [Leaderboards]
  • Score [Leaderboards]

Call flow:

  1. Call Leaderboards, passing in the People moniker to get the XUIDs, rank, and scores for the particular leaderboard that's limited to the user's People List.
  2. In parallel:
    • Call Profile, passing in the list of XUIDs to get the display name and picture URL for each.
    • Call People, passing in the list of XUIDs to find out if any are favorites of the user.

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