void Populate (JsonValue json, RootElement root, JsonValue data)
{
if (json.ContainsKey(Constants.Title))
root.Caption = json[Constants.Title];
JsonValue jsonRoot = null;
try {
jsonRoot = json[Constants.Root];
} catch (Exception){
Console.WriteLine("Bad JSON: could not find the root element - "+json.ToString()) ;
return;
}
if (json.ContainsKey(Constants.DataRoot)){
var dataroot = json[Constants.DataRoot].CleanString();
if (data!=null && data.ContainsKey(dataroot))
data = data[dataroot];
}
foreach (JsonObject section in jsonRoot){
var sec = new FormSectionBuilder(this._controller).Build(section, data);
foreach (var el in sec.Elements) {
if (!string.IsNullOrEmpty(el.ID) && !_elements.ContainsKey(el.ID)) _elements.Add(el.ID, el);
}
root.Add(sec);
}
}
public void InvalidPropertyTest()
{
JsonValue target = AnyInstance.AnyJsonPrimitive;
Assert.True(target.Count == 0);
Assert.False(target.ContainsKey(String.Empty));
Assert.False(target.ContainsKey(AnyInstance.AnyString));
}
public void PropertiesTest()
{
JsonValue target = AnyInstance.DefaultJsonValue;
Assert.Equal(JsonType.Default, target.JsonType);
Assert.Equal(0, target.Count);
Assert.Equal(false, target.ContainsKey("hello"));
Assert.Equal(false, target.ContainsKey(String.Empty));
}
internal Parser(JsonValue json)
{
_sourceparser = json;
MissingTokens = json.ContainsKey("missing_tokens")
? new HashSet<string>(json["missing_tokens"].Select(x => (string) x))
: new HashSet<string>();
}
public static string GetString(JsonValue obj, string key)
{
if (obj.ContainsKey(key))
if (obj[key].JsonType == JsonType.String)
return (string)obj[key];
return null;
}
public static ulong GetULongValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(0UL);
}
private static bool ContainsKey (JsonValue jsonValue, string key)
{
if (!jsonValue.ContainsKey (key)) {
LogContext.Current.Log<JsonUtil> ("JsonValueString: Missing key", key);
return false;
} else
return true;
}
public static char GetCharValue(this JsonValue self, string key, char defaultValue)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(defaultValue);
}
public static Guid GetGuidValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(Guid.Empty);
}
public static char GetCharValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return('\0');
}
public static short GetShortValue(this JsonValue self, string key, short defaultValue)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(defaultValue);
}
public static JsonArray GetJsonArray(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key] as JsonArray);
}
return(null);
}
public static Double GetDoubleValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(0.0D);
}
public static decimal GetDecimalValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(0);
}
public static long GetLongValue(this JsonValue self, string key, long defaultValue)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(defaultValue);
}
public static Uri GetUriValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(null);
}
public static DateTime GetDateTimeValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(new DateTime(1900, 1, 1));
}
public static bool GetBooleanValue(this JsonValue self, string key, bool defaultValue)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(defaultValue);
}
public static Byte GetByteValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(0);
}
public static JsonObject GetJsonObject(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key] as JsonObject);
}
return(null);
}
public FullQuestion(JsonValue jsonValue, Spin spin)
{
this.Spin = spin;
if (jsonValue.ContainsKey("powerup_question"))
this.PowerupQuestion = new Question(jsonValue["powerup_question"], this);
this.Question = new Question(jsonValue["question"], this);
}
public static DateTime GetDateTimeValue(this JsonValue self, string key, DateTime defaultValue)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(defaultValue);
}
public static TimeSpan GetTimeSpanValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(new TimeSpan());
}
public static float GetFloatValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(0.0f);
}
public static ushort GetUShortValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(0);
}
public static string GetStringValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(string.Empty);
}
public static Guid GetGuidValue(this JsonValue self, string key, Guid defaultValue)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(defaultValue);
}
public static DateTimeOffset GetDateTimeOffsetValue(this JsonValue self, string key)
{
if (self.ContainsKey(key))
{
return(self[key]);
}
return(new DateTimeOffset());
}
public static string CheckForLandmark (JsonValue searchResult, string locationName)
{
string result = "";
result = (
searchResult.ContainsKey ("types") ? (searchResult ["types"] as JsonArray).ToList () : new List<JsonValue> ()
).Exists (v =>
v == "stadium" // build this out as necessary with valid types from here https://developers.google.com/places/documentation/supported_types
) ? locationName : "";
return result;
}
internal void AddApp(int appId, JsonValue app, JsonValue engines)
{
var matches = new List<PathMatch>();
if (app.ContainsKey(Key))
{
matches.AddRange(app[Key].Select(match => new PathMatch(match.Value)));
}
if (app.ContainsKey("engine"))
{
var args = app["engine"];
var engine = engines[(string) args["name"]];
if (engine.ContainsKey(Key))
{
matches.AddRange(engine[Key].Select(match => new PathMatch(match.Value, args)));
}
}
Apps[appId] = matches;
}
static QuietTime GetQuietTime(JsonValue jsonValue)
{
if (jsonValue.ContainsKey("quiettime"))
{
var quiettime = jsonValue["quiettime"];
return new QuietTime
{
Start = quiettime.StringValue("start"),
End = quiettime.StringValue("end"),
};
}
return null;
}
public static LoginResponse DecodeLoginResponse (JsonValue json)
{
LoginResponse response = new LoginResponse ();
if (json == null) {
response.StatusCode = Response.UnknownError;
return response;
}
if (json.ContainsKey (STATUS)) {
response.StatusCode = json [STATUS];
} else if (json.ContainsKey (EXCEPTION)) {
response.StatusCode = json [EXCEPTION];
}
if (json.ContainsKey (UserInfo.SESSIONID)) {
response.SessionId = json [UserInfo.SESSIONID];
}
if (json.ContainsKey (UserInfo.NAME)) {
response.Name = json [UserInfo.NAME];
}
if (json.ContainsKey (UserInfo.EMAIL)) {
response.email = json [UserInfo.EMAIL];
}
// if (!response.IsOk) {
// if (json.ContainsKey (MESSAGE)) {
// response.Message = json [MESSAGE];
// } else if (json.ContainsKey ("msg")) {
// response.Message = json ["msg"];
// }
// }
return response;
}
public Session(JsonValue json)
: this()
{
Id = json["id"];
Title = json["title"];
Abstract = json["abstract"];
Location = json["location"];
var begins = json["begins"].ToString().Trim ('"').Substring (0, 19).Replace ("T", " ");
Begins = DateTime.Parse (begins);
if (json.ContainsKey("ends"))
{
var ends = json["ends"].ToString().Trim('"').Substring(0, 19).Replace("T", " ");
Ends = DateTime.Parse(ends, System.Globalization.CultureInfo.InvariantCulture);
}
}
public VBUser(JsonValue json) {
DB_Communicator db = DB_Communicator.getInstance();
this.idUser = db.convertAndInitializeToInt(db.containsKey(json, "id", DB_Communicator.JSON_TYPE_INT));
this.name = db.convertAndInitializeToString(db.containsKey(json, "name", DB_Communicator.JSON_TYPE_STRING));
this.email = db.convertAndInitializeToString(db.containsKey(json, "email", DB_Communicator.JSON_TYPE_STRING));
this.state = db.convertAndInitializeToString(db.containsKey(json, "state", DB_Communicator.JSON_TYPE_STRING));
this.setUserType(db.convertAndInitializeToString(db.containsKey(json, "userType", DB_Communicator.JSON_TYPE_STRING)));
this.listTeamRole = new List<VBTeamrole>();
if(json.ContainsKey("teamroles")) {
if(json["teamroles"] is JsonObject) {
JsonValue teamrole = json["teamroles"]["TeamRole"];
this.listTeamRole.Add(new VBTeamrole(teamrole));
} else {
foreach(JsonValue teamrole in json["teamroles"]) {
this.listTeamRole.Add(new VBTeamrole(teamrole["TeamRole"]));
}
}
}
}
public Section Build(JsonObject section, JsonValue data)
{
var sec = new Section(section.asString("caption"), section.asString("footer"));
if (!string.IsNullOrEmpty(section.asString("captionImage"))) {
var imgDevice = section.asString("captionImage").Split(' ');
var img = UIDevice.CurrentDevice.UserInterfaceIdiom==UIUserInterfaceIdiom.Phone ? imgDevice[0] : imgDevice[1];
sec.HeaderView = new UIImageView(UIImage.FromBundle(img));
}
if (section.ContainsKey("elements")){
foreach (JsonObject elem in section["elements"]) {
var dataForElement = data;
var bindExpression = elem.asString("bind");
if (bindExpression!=null) {
try {
if (data!=null && data.JsonType==JsonType.Object){
var bind = elem.asString("bind");
if (data != null && !string.IsNullOrEmpty(bind) && data.ContainsKey(bind)) {
dataForElement = data[bind];
}
} else if (bindExpression.StartsWith("#")) {
dataForElement = _controller.GetValue(bindExpression.Replace("#", ""));
}
} catch (Exception e){
Console.WriteLine("Exception when binding element " + elem.ToString()+ " - " + e.ToString());
}
}
_parseElement(elem, sec, dataForElement);
}
} else if (section.ContainsKey("iterate") && data != null){
string iterationname = section["iterate"];
JsonArray iterationdata = null;
if (iterationname.Contains("#")){ // for when list is in member of object
var splittedName = iterationname.Split('#');
var obj = (JsonObject)data[splittedName[0]];
iterationdata = (JsonArray)obj[splittedName[1]];
} else {
iterationdata = string.IsNullOrEmpty(iterationname) ? (JsonArray)data : (JsonArray)data[iterationname];
}
string emptyMessage = section.ContainsKey("empty") ? section["empty"].CleanString() : "Empty";
var template = (JsonObject)section["template"];
var items = iterationdata.ToList();
if (items.Count>0) {
foreach(JsonValue v in items){
_parseElement(template, sec, v);
}
} else {
sec.Add(new EmptyListElement(emptyMessage));
}
} else if (section.ContainsKey("iterateproperties") && data != null){
string iterationname = section["iterateproperties"];
string emptyMessage = section.ContainsKey("empty") ? section["empty"].CleanString() : "Empty";
var iterationdata = string.IsNullOrEmpty(iterationname) ? (JsonObject)data
: data.ContainsKey(iterationname) ? (JsonObject)data[iterationname] : null;
var template = (JsonObject)section["template"];
var items = iterationdata == null ? new List<string>() : iterationdata.Keys;
if (items.Count>0) {
foreach(string v in items){
var obj = new JsonObject();
obj.Add(v, iterationdata[v]);
_parseElement(template, sec, obj);
}
} else {
sec.Add(new EmptyListElement(emptyMessage));
}
}
return sec;
}
public static JsonValue valueOrDefault(JsonValue jsonObject, string key, string defaultValue)
{
// Returns jsonObject[key] if it exists. If the key doesn't exist returns defaultValue and
// logs the anomaly into the Chronojump log.
if (jsonObject.ContainsKey (key)) {
return jsonObject [key];
} else {
LogB.Information ("JsonUtils::valueOrDefault: returning default (" + defaultValue + ") from JSON: " + jsonObject.ToString ());
return defaultValue;
}
}
private async Task<int> EventHandling(DataBaseWrapper db, JsonValue result) {
if (result.ContainsKey ("events")) {
JsonArray arr = (JsonArray) result ["events"];
foreach (JsonValue v in arr) {
var e = new Event () {
type = v ["type"],
msg = v ["msg"],
nick = v ["nick"],
text = v ["text"],
time = v ["time"],
author = v ["author"]
};
db.Insert (e);
}
if (backgroundService != null) {
await backgroundService.UpdateNotifications();
}
}
if (result.ContainsKey ("onLoginError")) {
return 1;
}
return 0;
}
private void _configureDialog(JsonValue json, JsonObject valuesJson){
if (json.ContainsKey("grouped")) {
Style = bool.Parse(json["grouped"].ToString()) ? UITableViewStyle.Grouped : UITableViewStyle.Plain;
}
if (json.ContainsKey("title"))
Title = json["title"];
if (json.ContainsKey("dataroot"))
DataRootName = json["dataroot"];
if (json.ContainsKey("rightbaritem")){
var item = (JsonObject)json["rightbaritem"];
string datavalue = null, id = null;
id = item.s("id");
if (valuesJson!=null && !string.IsNullOrEmpty(id)){
datavalue = valuesJson.s(id);
}
if (item.ContainsKey("action")) {
rightBarItem = item.ContainsKey("url") ?
new SubmitElement(item.s("caption"), datavalue ?? item.s("url"), null, null) :
new ActionElement(item.s("caption"), datavalue ?? item.s("action"), null);
rightBarItem.ID = id;
}
if (item.ContainsKey("image")){
NavigationItem.RightBarButtonItem = new UIBarButtonItem(UIImage.FromBundle(item.s("image")), UIBarButtonItemStyle.Plain, (object o, EventArgs a)=>{
InvokeAction(this.rightBarItem);
});
} else {
NavigationItem.RightBarButtonItem = new UIBarButtonItem(item.s("caption"), UIBarButtonItemStyle.Plain, (object o, EventArgs a)=>{
InvokeAction(this.rightBarItem);
});
}
}
if (json.ContainsKey("leftbaritem")){
var item = (JsonObject)json["leftbaritem"];
if (item.ContainsKey("action")) {
leftBarItem = item.ContainsKey("url") ?
new SubmitElement(item.s("caption"), item.s("url"), null, null) :
new ActionElement(item.s("caption"), item.s("action"), null);
leftBarItem.ID = item.s("id");
}
NavigationItem.LeftBarButtonItem = new UIBarButtonItem(item.s("caption"), UIBarButtonItemStyle.Plain, (object o, EventArgs a)=>{
InvokeAction(this.leftBarItem);
});
}
}
string GetValue (JsonValue json, string field)
{
if (!json.ContainsKey (field))
return string.Empty;
return json [field].ToString ().Trim ('"');
}
public void BuildFromJsonObject(JsonValue json)
{
Id = json ["Id"];
Name = json ["Name"];
Icon = json ["Icon"];
MinYear = Convert.ToInt32 (json ["MinYear"].ToString ());
MaxYear = Convert.ToInt32 (json ["MaxYear"].ToString ());
if (json.ContainsKey ("Publishers")) {
if (json ["Publishers"] is JsonArray) {
Publishers = new List<string> ();
foreach (var publisherJson in ((JsonArray)json["Publishers"])) {
Publishers.Add (publisherJson);
}
}
}
if (json.ContainsKey ("Genres")) {
if (json ["Genres"] is JsonArray) {
Genres = new List<string> ();
foreach (var genreJson in ((JsonArray)json["Genres"])) {
Genres.Add (genreJson);
}
}
}
if (json.ContainsKey ("Platforms")) {
if (json ["Platforms"] is JsonArray) {
Platforms = new List<string> ();
foreach (var platformJson in ((JsonArray)json["Platforms"])) {
Platforms.Add (platformJson);
}
}
}
if (json.ContainsKey ("RequiredGameIds")) {
if (json ["RequiredGameIds"] is JsonArray) {
RequiredGameIds = new Dictionary<int, int[]> ();
foreach (var jsonQuestion in ((JsonArray)json["RequiredGameIds"])) {
int gameId = Convert.ToInt32 (jsonQuestion ["GameId"].ToString ());
List<int> answers = new List<int> ();
foreach (var jsonAnswer in ((JsonArray)jsonQuestion["Answers"])) {
int answerGameId = Convert.ToInt32 (jsonAnswer.ToString ());
answers.Add (answerGameId);
}
RequiredGameIds.Add (gameId, answers.ToArray());
}
}
}
}
/// <summary>
/// Parse Json config
/// </summary>
/// <param name="json">Json.</param>
public void BuildFromJsonObject(JsonValue json)
{
// Example
// { "version": 1, "last_edit": 2013-07-10T11:44:12+02:00, "config": "{ "modes": [ {"Mode": 0, "Difficulty": 0, "Time": 10, "Score": 100, "QuestionsCount": 20},}
// Parse "config"
if (json.ContainsKey ("config")) {
JsonValue config = json ["config"];
if (config.ContainsKey ("modes")) {
JsonValue modesConfig = config ["modes"];
if (modesConfig is JsonArray) {
foreach (JsonValue c in modesConfig) {
// Parsing each game mode configuration
GameMode mode = GameMode.SCORE;
GameDifficulty difficulty = GameDifficulty.EASY;
int? time = null;
int? score = null;
int? questionCount = null;
mode = (GameMode)Enum.Parse (typeof(GameMode), c ["Mode"].ToString ());
difficulty = (GameDifficulty)Enum.Parse (typeof(GameDifficulty), c ["Difficulty"].ToString ());
if (c.ContainsKey ("Time")) {
time = Convert.ToInt32 (c ["Time"].ToString ());
}
if (c.ContainsKey ("Score")) {
score = Convert.ToInt32 (c ["Score"].ToString ());
}
if (c.ContainsKey ("QuestionsCount")) {
questionCount = Convert.ToInt32 (c ["QuestionsCount"].ToString ());
}
ModeConfigurationItem modeConfig = new ModeConfigurationItem () {
Mode = mode,
Difficulty = difficulty,
Time = time,
Score = score,
QuestionCount = questionCount
};
ModesConfiguration.Add (modeConfig);
}
}
}
// Parse other "Properties"
if (json.ContainsKey ("properties")) {
JsonValue properties = json ["properties"];
if (properties is JsonArray) {
foreach (JsonValue p in properties) {
string key = p ["key"].ToString ();
string value = p ["value"].ToString ();
Properties.Add (new PropertyConfigurationItem (key, value));
}
}
}
}
}
private void _configureDialog(JsonValue json, JsonObject valuesJson){
if (json.ContainsKey(Constants.Grouped)) {
Style = bool.Parse(json[Constants.Grouped].ToString()) ? UITableViewStyle.Grouped : UITableViewStyle.Plain;
}
if (json.ContainsKey(Constants.Title))
Title = json[Constants.Title];
if (json.ContainsKey(Constants.DataRoot))
DataRootName = json[Constants.DataRoot];
if (json.ContainsKey(Constants.RightBarItem)){
NavigationItem.RightBarButtonItem = _createButtonItemFor(Constants.RightBarItem, json, valuesJson);
}
if (json.ContainsKey(Constants.LeftBarItem)){
NavigationItem.LeftBarButtonItem = _createButtonItemFor(Constants.LeftBarItem, json, valuesJson);
}
}
internal void ReloadGame(JsonValue jsonValue)
{
this.Status = (string)jsonValue["game_status"];
this.Id = (int)jsonValue["id"];
this.UnreadMessages = (int)jsonValue["unread_messages"];
this.MyPlayerNumber = (int)jsonValue["my_player_number"];
this.RoundNumber = (int)jsonValue["round_number"];
this.IsRandom = (bool)jsonValue["is_random"];
this.MyTurn = (bool)jsonValue["my_turn"];
this.Opponent = new User((string)jsonValue["opponent"]["username"], (int)jsonValue["opponent"]["id"]);
if (jsonValue.ContainsKey("win"))
this.Win = (bool)jsonValue["win"];
this.Player1Charges = (int)jsonValue["player_one"]["charges"];
this.Player1Crowns = new List<string>();
if (jsonValue["player_one"].ContainsKey("crowns"))
{
JsonArray player1CrownsJsonArray = (JsonArray)jsonValue["player_one"]["crowns"];
foreach (JsonValue crown in player1CrownsJsonArray)
this.Player1Crowns.Add((string)crown);
}
this.Player2Charges = (int)jsonValue["player_two"]["charges"];
this.Player2Crowns = new List<string>();
if (jsonValue["player_two"].ContainsKey("crowns"))
{
JsonArray player2CrownsJsonArray = (JsonArray)jsonValue["player_two"]["crowns"];
foreach (JsonValue crown in player2CrownsJsonArray)
this.Player2Crowns.Add((string)crown);
}
this.Spins = new List<Spin>();
if (jsonValue.ContainsKey("spins_data"))
{
JsonArray spinsJsonArray = (JsonArray)jsonValue["spins_data"]["spins"];
foreach (JsonValue spinJsonValue in spinsJsonArray)
this.Spins.Add(new Spin(spinJsonValue, this));
}
}
public JsonValue containsKey(JsonValue value, string key, int type) {
JsonPrimitive nullValue = new JsonPrimitive("");
switch(type) {
case JSON_TYPE_INT:
nullValue = new JsonPrimitive(0);
break;
case 1:
nullValue = new JsonPrimitive("");
break;
case 2:
nullValue = new JsonPrimitive(new DateTime());
break;
}
if(value == null)
return nullValue;
return (value.ContainsKey(key)) ? value[key] : nullValue;
}
void Populate (JsonValue json, RootElement root, JsonValue data)
{
if (json.ContainsKey("title"))
root.Caption = json["title"];
JsonValue jsonRoot = null;
try {
jsonRoot = json["root"];
} catch (Exception){
Console.WriteLine("Bad JSON: could not find the root element - "+json.ToString()) ;
return;
}
foreach (JsonObject section in jsonRoot){
var sec = new Section(section.s("caption"), section.s("footer"));
if (section.ContainsKey("elements")){
foreach (JsonObject elem in section["elements"]) {
var dataForElement = data;
var bindExpression = elem.s("bind");
if (bindExpression!=null) {
try {
if (data!=null && data.JsonType==JsonType.Object){
var bind = elem.s("bind");
if (data != null && !string.IsNullOrEmpty(bind) && data.ContainsKey(bind)) {
dataForElement = data[bind];
}
} else if (bindExpression.StartsWith("#")) {
dataForElement = _controller.GetValue(bindExpression.Replace("#", ""));
}
} catch (Exception){
Console.WriteLine("Exception when binding element " + elem.ToString());
}
}
_parseElement(elem, sec, dataForElement);
}
} else if (section.ContainsKey("iterate") && data != null){
string iterationname = section["iterate"];
string emptyMessage = section.ContainsKey("empty") ? section["empty"].CleanString() : "Empty";
var iterationdata = string.IsNullOrEmpty(iterationname) ? (JsonArray)data : (JsonArray)data[iterationname];
var template = (JsonObject)section["template"];
var items = iterationdata.ToList();
if (items.Count>0) {
foreach(JsonValue v in items){
_parseElement(template, sec, v);
}
} else {
sec.Add(new EmptyListElement(emptyMessage));
}
} else if (section.ContainsKey("iterateproperties") && data != null){
string iterationname = section["iterateproperties"];
string emptyMessage = section.ContainsKey("empty") ? section["empty"].CleanString() : "Empty";
var iterationdata = string.IsNullOrEmpty(iterationname) ? (JsonObject)data : (JsonObject)data[iterationname];
var template = (JsonObject)section["template"];
var items = iterationdata.Keys;
if (items.Count>0) {
foreach(string v in items){
var obj = new JsonObject();
obj.Add(v, iterationdata[v]);
_parseElement(template, sec, obj);
}
} else {
sec.Add(new EmptyListElement(emptyMessage));
}
}
root.Add(sec);
}
}
public void toastJson(Context context, JsonValue json, ToastLength length, string alternativeMessage) {
Context c = (context != null) ? context : mainActivity;
string message = (json.ContainsKey("message")) ? json["message"].ToString() : alternativeMessage;
Toast.MakeText(c, message, length).Show();
}