/*
* Ask the server to skip the current song.
*/
private IEnumerator SkipPlay(JSONNode play)
{
Ajax ajax = new Ajax(Ajax.RequestType.POST, apiServerBase + "/play/" + play["id"] + "/skip");
yield return StartCoroutine(SignedRequest (ajax));
if ((current == null) || (current.play != play)) {
// current song has since changed - we don't care about this response any more
yield break;
}
if (ajax.success) {
if (pendingPlay != null) {
// skip to play already queued up
JSONNode pp = pendingPlay;
pendingPlay = null;
AssignCurrentPlay(pp);
} else if (pendingRequest != null) {
// we're waiting for a pending request to come in
AssignCurrentPlay(null, true);
} else {
// we're probably out of music here, since a 'start' notification
// should have already kicked off a 'requestNextPlay()' call
AssignCurrentPlay(null);
}
yield break;
} else {
current.canSkip = false; // prevent future tries until we get next song
if (onSkipDenied != null) onSkipDenied(this);
yield break;
}
}
/*
* Tell the server that we're starting playback of our active song
*/
private IEnumerator StartPlay(JSONNode play)
{
while (true) {
Ajax ajax = new Ajax(Ajax.RequestType.POST, apiServerBase + "/play/" + play["id"] + "/start");
yield return StartCoroutine(SignedRequest(ajax));
if ((current == null) || (current.play != play)) {
// nobody cares about this song any more
yield break;
}
if (ajax.success) {
current.canSkip = ajax.response["can_skip"].AsBool;
current.started = true;
if (onPlayStarted != null) onPlayStarted(this, play);
// start looking for the next song
yield return StartCoroutine(RequestNextPlay());
yield break;
} else if (ajax.error == (int) FeedError.PlaybackStarted) {
// we appear to have missed the response to the original start.
// assume the song was good
current.canSkip = true;
current.started = true;
if (onPlayStarted != null) onPlayStarted(this, play);
// start looking for the next song
yield return StartCoroutine(RequestNextPlay());
yield break;
} else {
current.retryCount++;
yield return new WaitForSeconds(2.0f);
// try again later
}
}
}
/*
* Ask the server to create a new play for us, and queue it up
*/
private IEnumerator RequestNextPlay()
{
if (pendingRequest != null) {
// we're already waiting for a play to come in
yield break;
}
yield return StartCoroutine (EnsureClientId ());
while (clientId != null) {
Ajax ajax = new Ajax(Ajax.RequestType.POST, apiServerBase + "/play");
ajax.addParameter("formats", formats);
ajax.addParameter("client_id", clientId);
ajax.addParameter("max_bitrate", maxBitrate);
if (!String.IsNullOrEmpty(_placementId)) {
ajax.addParameter("placement_id", _placementId);
}
if (!String.IsNullOrEmpty(_stationId)) {
ajax.addParameter ("station_id", _stationId);
}
// let the rest of the code know we're awaiting a response
pendingRequest = new PendingRequest {
ajax = ajax,
retryCount = 0
};
yield return StartCoroutine(SignedRequest(ajax));
if ((pendingRequest == null) || (pendingRequest.ajax != ajax)) {
// another request snuck in while waiting for the response to this one,
// so we don't care about this one any more - just quit
yield break;
}
if (ajax.success) {
inUS = true;
pendingRequest = null;
if (current != null) {
// play this when the current song is complete
pendingPlay = ajax.response["play"];
} else {
// start playing this right now, since nothing else is active
AssignCurrentPlay (ajax.response["play"]);
}
yield break;
} else if (ajax.error == (int) FeedError.NoMoreMusic) {
if (current != null) {
// ran out of music to play, but we're still playing something, so
// just make a note here
pendingPlay = null;
} else {
// ran out of music, and nothing else to play
exhausted = true;
if (onPlaysExhausted != null) onPlaysExhausted(this);
}
pendingRequest = null;
yield break;
} else if (ajax.error == (int) FeedError.NotUS) {
// user isn't in the united states, so can't play anything
inUS = false;
if (onNotInUS != null) onNotInUS(this);
yield break;
} else {
// some unknown error
pendingRequest.retryCount++;
// wait for an increasingly long time before retrying
yield return new WaitForSeconds(0.5f * (float) Math.Pow(2.0, pendingRequest.retryCount));
}
}
}
/************** internal API ******************/
/*
* Send an ajax request to the server along with authentication information
*/
private IEnumerator SignedRequest(Ajax ajax)
{
// add in authentication header
ajax.addHeader ("Authorization",
"Basic " + System.Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(token + ":" + secret)));
yield return StartCoroutine(ajax.Request());
if (!ajax.success && (ajax.error == (int) FeedError.BadCredentials)) {
throw new Exception("Invalid credentials provided!");
}
//ajax.DebugResponse();
yield break;
}
private IEnumerator InvalidatePlay(JSONNode play)
{
int retryCount = 0;
while (true) {
Ajax ajax = new Ajax(Ajax.RequestType.POST, apiServerBase + "/play/" + play["id"] + "/invalidate");
yield return StartCoroutine (SignedRequest (ajax));
if ((current == null) || (current.play != play)) {
// nboody cares about this song any more
yield break;
}
if (ajax.success) {
if (pendingPlay != null) {
// skip to play already queued up
JSONNode pp = pendingPlay;
pendingPlay = null;
AssignCurrentPlay(pp);
} else {
// invalidate current song
AssignCurrentPlay(null, true);
// If nothing is queued up, that might be because we haven't tried to 'start'
// this play yet, triggering the 'requestNextPlay'. So trigger it here.
yield return StartCoroutine(RequestNextPlay());
}
yield break;
} else {
retryCount++;
yield return new WaitForSeconds(0.2f * (float) Math.Pow(2.0, retryCount));
}
}
}
/*
* Request information about the placement referred to by placementId. If it is
* empty, then request a default placement and set placementId.
*/
private IEnumerator GetPlacementInformation()
{
if (!String.IsNullOrEmpty(_placementId) && (placement != null) && ((string) placement["id"] == _placementId)) {
// we already have this placement loaded up
yield break;
}
while (true) {
Ajax ajax;
if (String.IsNullOrEmpty(_placementId)) {
ajax = new Ajax(Ajax.RequestType.GET, apiServerBase + "/placement");
} else {
ajax = new Ajax(Ajax.RequestType.GET, apiServerBase + "/placement/" + _placementId);
}
yield return StartCoroutine (SignedRequest (ajax));
if (ajax.success) {
placement = ajax.response["placement"];
stations = ajax.response["stations"];
if (String.IsNullOrEmpty(_placementId)) {
if (onPlacementChanged != null) onPlacementChanged(this, _placementId);
}
if (_placementId != placement["id"]) {
_placementId = placement["id"];
if (onPlacement != null) onPlacement(this, placement);
}
if (String.IsNullOrEmpty(_stationId) && (stations.Count > 0)) {
_stationId = stations[0]["id"];
if (onStationChanged != null) onStationChanged(this, _stationId);
}
if (onStations != null) onStations(this, stations);
yield break;
} else if (ajax.error == (int) FeedError.MissingObject) {
// can't find placement - no point in continuing
if (String.IsNullOrEmpty(_placementId)) {
// no default placement
throw new Exception("No default placement for these credentials");
} else {
// no such placement
throw new Exception("No such placement with id " + _placementId);
}
}
yield return new WaitForSeconds(0.5f);
}
}
/*
* Ensure we've got a clientId
*/
private IEnumerator EnsureClientId()
{
if (clientId != null) {
yield break;
}
if (PlayerPrefs.HasKey ("feedfm.client_id")) {
// have one already, so use it
clientId = PlayerPrefs.GetString("feedfm.client_id");
if (onClientRegistered != null) onClientRegistered(this);
yield break;
} else {
// need to get an id
while (true) {
Ajax ajax = new Ajax(Ajax.RequestType.POST, apiServerBase + "/client");
yield return StartCoroutine(SignedRequest (ajax));
if (ajax.success) {
clientId = ajax.response["client_id"];
try {
PlayerPrefs.SetString ("feedfm.client_id", clientId);
} catch (PlayerPrefsException) {
// ignore, *sigh*
}
if (onClientRegistered != null) onClientRegistered(this);
yield break;
} else if (ajax.error == (int) FeedError.NotUS) {
// user isn't in the united states, so can't play anything
inUS = false;
if (onNotInUS != null) onNotInUS(this);
yield break;
}
// no success, so wait bit and then try again
yield return new WaitForSeconds(1.0f);
}
}
}
/*
* Tell the server we've completed the current play, and make any pending
* play active.
*/
private IEnumerator CompletePlay()
{
Ajax ajax = new Ajax(Ajax.RequestType.POST, apiServerBase + "/play/" + current.play["id"] + "/complete");
yield return StartCoroutine(SignedRequest (ajax));
// we really don't care what the response was, really
if (pendingRequest == null) {
// start playing whatever we've got queued up
JSONNode pp = pendingPlay;
pendingPlay = null;
AssignCurrentPlay(pp);
} else {
// waiting for a request to come in, so kill current song and announce that we're waiting
AssignCurrentPlay (null, true);
}
}
/*
* Tell the server how much of the song we've listened to
*/
public virtual void ReportPlayElapsed(int seconds)
{
if (current == null) {
throw new Exception ("Attempt to report elapsed play time, but the pay hasn't started");
}
Ajax ajax = new Ajax (Ajax.RequestType.POST, apiServerBase + "/play/" + current.play ["id"] + "/elapse");
ajax.addParameter ("seconds", seconds.ToString ());
StartCoroutine (SignedRequest (ajax));
}
