Epic Online Services: Get friend data sample in Swift

eos_friend_data_sample_1.swift

import EOSSDK

var platformHandle: EOS_HPlatform
var accountID: EOS_EpicAccountId

// 1. Send a query to get friends info
func getFriends() {
    guard let friendsHandle = EOS_Platform_GetFriendsInterface(platformHandle) else {
        return
    }
    var friendOptions = EOS_Friends_QueryFriendsOptions()
    friendOptions.ApiVersion = EOS_FRIENDS_QUERYFRIENDS_API_LATEST
    friendOptions.LocalUserId = accountID
    EOS_Friends_QueryFriends(friendsHandle, &friendOptions, nil, queryFriendsFunc)
}

// 2. Get the result of the friend query
func queryFriendsFunc(data: Optional<UnsafePointer<_tagEOS_Friends_QueryFriendsCallbackInfo>>) {
    guard let info = data?.pointee else { return }
    guard info.ResultCode == EOS_Success else { return }
    guard let platformHandle = EOSManager.platformHandle else { return }
    
    guard let friendsHandle = EOS_Platform_GetFriendsInterface(platformHandle) else {
        return
    }
    
    var friendsCountOptions = EOS_Friends_GetFriendsCountOptions();
    friendsCountOptions.ApiVersion = EOS_FRIENDS_GETFRIENDSCOUNT_API_LATEST;
    friendsCountOptions.LocalUserId = info.LocalUserId
    let friendsCount = EOS_Friends_GetFriendsCount(friendsHandle, &friendsCountOptions);
    
    Swift.print("Friends count: \(friendsCount)")
    
    var indexOptions = EOS_Friends_GetFriendAtIndexOptions()
    indexOptions.ApiVersion = EOS_FRIENDS_GETFRIENDATINDEX_API_LATEST
    indexOptions.LocalUserId = info.LocalUserId
    
    guard let presenceHandle = EOS_Platform_GetPresenceInterface(platformHandle) else { return }
    
    for i in 0..<friendsCount {
        indexOptions.Index = Int32(i)
        let friendId = EOS_Friends_GetFriendAtIndex(friendsHandle, &indexOptions);
        guard EOS_EpicAccountId_IsValid(friendId) == EOS_TRUE else { return }
        
        var statusOptions = EOS_Friends_GetStatusOptions()
        statusOptions.ApiVersion = EOS_FRIENDS_GETSTATUS_API_LATEST
        statusOptions.LocalUserId = info.LocalUserId
        statusOptions.TargetUserId = friendId
        let status = EOS_Friends_GetStatus(friendsHandle, &statusOptions)
        if status == EOS_FS_Friends {
            Swift.print("We are friends!")
        } else {
            // EOS_FS_NotFriends, EOS_FS_InviteSent, EOS_FS_InviteReceived, or unknown
        }
        
        var presenceOptions = EOS_Presence_QueryPresenceOptions()
        presenceOptions.ApiVersion = EOS_PRESENCE_QUERYPRESENCE_API_LATEST
        presenceOptions.LocalUserId = info.LocalUserId
        presenceOptions.TargetUserId = friendId
        EOS_Presence_QueryPresence(presenceHandle, &presenceOptions, nil, queryPresenceFunc)
    }
    
    var notificationOptions = EOS_Presence_AddNotifyOnPresenceChangedOptions()
    notificationOptions.ApiVersion = EOS_PRESENCE_ADDNOTIFYONPRESENCECHANGED_API_LATEST
    EOS_Presence_AddNotifyOnPresenceChanged(presenceHandle, &notificationOptions, nil, presenceChangedFunc)
}

// 3. Get presence of the given friend
func queryPresenceFunc(data: Optional<UnsafePointer<_tagEOS_Presence_QueryPresenceCallbackInfo>>) {
    guard let info = data?.pointee else { return }
    guard info.ResultCode == EOS_Success else { return }
    guard let platformHandle = EOSManager.platformHandle else { return }
    guard let presenceHandle = EOS_Platform_GetPresenceInterface(platformHandle) else { return }
    
    var presenceOptions = EOS_Presence_CopyPresenceOptions()
    presenceOptions.ApiVersion = EOS_PRESENCE_COPYPRESENCE_API_LATEST
    presenceOptions.LocalUserId = info.LocalUserId
    presenceOptions.TargetUserId = info.TargetUserId
    
    var presence: UnsafeMutablePointer<EOS_Presence_Info>? = nil
    
    let result = EOS_Presence_CopyPresence(presenceHandle, &presenceOptions, &presence)
    guard result == EOS_Success else { return }
    guard let presenceData = presence?.pointee else { return }

    if let richTextPtr = presenceData.RichText {
        let richText = String(cString: richTextPtr)
        Swift.print("RichText: \(richText)")
    }
    
    EOS_Presence_Info_Release(presence)
}

// 4. Register notifications of presence changes
func presenceChangedFunc(data: Optional<UnsafePointer<_tagEOS_Presence_PresenceChangedCallbackInfo>>) {
    guard let info = data?.pointee else { return }
    guard let platformHandle = EOSManager.platformHandle else { return }
    guard let presenceHandle = EOS_Platform_GetPresenceInterface(platformHandle) else { return }
    
    var presenceOptions = EOS_Presence_QueryPresenceOptions()
    presenceOptions.ApiVersion = EOS_PRESENCE_QUERYPRESENCE_API_LATEST
    presenceOptions.LocalUserId = info.LocalUserId
    presenceOptions.TargetUserId = info.PresenceUserId

    EOS_Presence_QueryPresence(presenceHandle, &presenceOptions, nil, queryPresenceFunc)
}