public static string ToDebugString(this UserPhoto arg)
{
var key = string.Format("Key: {{[{0}] '{1}' {2}}}", arg.Topic, arg.IdUser, arg.IdContent);
StringBuilder flags = new StringBuilder();
int n = 0;
if (arg.Likes)
{
flags.Append(n++ == 0 ? "Like" : ", Like");
}
if (arg.Dislikes)
{
flags.Append(n++ == 0 ? "Dislike" : ", Dislike");
}
if (arg.Stars)
{
flags.Append(n++ == 0 ? "Starred" : ", Starred");
}
if (arg.Shares)
{
flags.Append(n++ == 0 ? "Shared" : ", Shared");
}
return(key + ": " + flags);
}
public UserPhoto GetUserPhoto(string topic, string idUser, string idContent)
{
var userPhoto = Db.Lookup(DataModelExtensions.ToUserPhotoKey(topic, idUser, idContent)).ToUserPhoto();
if (userPhoto == null)
{
userPhoto = new UserPhoto()
{
IdUser = idUser, IdContent = idContent
}
}
;
return(userPhoto);
}
public static Entity ToEntity(this UserPhoto userPhoto)
{
return(new Entity
{
Key = ToUserPhotoKey(userPhoto.Topic, userPhoto.IdUser, userPhoto.IdContent),
["Stars"] = new Value()
{
BooleanValue = userPhoto.Stars, ExcludeFromIndexes = true
},
["Likes"] = new Value()
{
BooleanValue = userPhoto.Likes, ExcludeFromIndexes = true
},
["Dislikes"] = new Value()
{
BooleanValue = userPhoto.Dislikes, ExcludeFromIndexes = true
},
["Shares"] = new Value()
{
BooleanValue = userPhoto.Shares, ExcludeFromIndexes = true
},
});
}
// false means Storage does not need updates
private bool ApplyAction(Content content, UserPhoto userPhoto, UserAction action)
{
int deltaStars = 0, deltaLike = 0, deltaDislike = 0, deltaShare = 0;
switch (action)
{
case UserAction.Star:
if (userPhoto.Stars)
{
return(false);
}
deltaStars = 1;
userPhoto.Stars = true;
break;
case UserAction.Like:
if (userPhoto.Likes)
{
return(false);
}
else if (userPhoto.Dislikes)
{
deltaDislike = -1;
userPhoto.Dislikes = false;
}
deltaLike = 1;
userPhoto.Likes = true;
break;
case UserAction.Dislike:
if (userPhoto.Dislikes)
{
return(false);
}
else if (userPhoto.Likes)
{
deltaLike = -1;
userPhoto.Likes = false;
}
deltaDislike = 1;
userPhoto.Dislikes = true;
break;
case UserAction.Share:
deltaShare = 1;
userPhoto.Shares = true;
break;
default:
throw new ArgumentException($"Action {action} is not supported");
}
content.Dislikes += deltaDislike;
content.Likes += deltaLike;
content.Shares += deltaShare;
content.Stars += deltaStars;
return(true);
}
public void AddUserAction(string topic, string idUser, string idContent, UserAction action)
{
// User 'Tester' on [Liked-content] topic 'One Topic'
/*
* if (Debugger.IsAttached && topic == "One Topic" && idUser == "Tester" && idContent == "Liked-content")
* Debugger.Break();
*/
Stopwatch sw = Stopwatch.StartNew();
String debug = $"{action,-7} by User '{idUser}' on [{idContent}] topic '{topic}'";
try
{
/*
* var userPhotoKey = DataModelExtensions.ToUserPhotoKey(topic, idContent);
* var contentIs = Filter.Equal("__key__", userPhotoKey);
* var userIs = Filter.Equal("IdUser", idUser);
* Query querySingleUserPhoto = new Query("UserPhoto")
* {
* Filter = Filter.And(contentIs, userIs)
* };
* var userPhoto = Db.RunQuery(querySingleUserPhoto).Entities.FirstOrDefault().ToUserPhoto();
*/
var userPhoto = Db.Lookup(DataModelExtensions.ToUserPhotoKey(topic, idUser, idContent)).ToUserPhoto();
bool isUserPhotoNew = userPhoto == null;
if (userPhoto == null)
{
userPhoto = new UserPhoto()
{
Topic = topic, IdUser = idUser, IdContent = idContent
}
}
;
var contentKey = DataModelExtensions.ToContentKey(topic, idContent);
var content = Db.Lookup(contentKey).ToContent();
if (content == null)
{
content = new Content()
{
Topic = topic, IdContent = idContent
}
}
;
if (!ApplyAction(content, userPhoto, action))
{
Console.WriteLine($"None: {debug} in {sw.Elapsed}");
return;
}
Entity entityContent = content.ToEntity();
Entity entityUserPhoto = userPhoto.ToEntity();
Db.Upsert(entityContent, entityUserPhoto);
Console.WriteLine($"DONE: {debug} in {sw.Elapsed}");
}
catch (Exception ex)
{
Console.WriteLine($"FAIL: {debug} in {sw.Elapsed}:" + Environment.NewLine + " " + ex.GetExceptionDigest());
throw new Exception("AddAction failed " + debug, ex);
}
}