/// <summary>
/// Creates a canvas
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
private async Task <bool> InternalGetCanvas(ObjectId id)
{
//Load from the database
DbCanvas data = await Program.conn.LoadCanvasData(id);
if (data == null)
{
return(false);
}
//Set data
saved_users_index = data.user_index;
users = data.users;
last_edit = data.last_edited;
last_editor = data.last_editor;
//Load data from disk
if (File.Exists(GetSavePath()))
{
using (FileStream fs = new FileStream(GetSavePath(), FileMode.Open))
await fs.CopyToAsync(canvas_data);
}
//Set timer
save_timer.AutoReset = true;
save_timer.Elapsed += DoAutosave;
save_timer.Start();
return(true);
}
private static RPCPayloadModifyCanvas_ListedCanvas ConvertCanvas(DbCanvas c)
{
return(new RPCPayloadModifyCanvas_ListedCanvas
{
color = c.color,
href = Program.connection.config.hosts.master + "/api" + "/servers/" + c.server_id + "/canvas/" + c.id,
id = c.id,
name = c.name,
thumbnail = c.thumbnail_url
});
}
/// <summary>
/// Loads canvas data
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public async Task <DbCanvas> LoadCanvasData(ObjectId id)
{
var filterBuilder = Builders <DbCanvas> .Filter;
var filter = filterBuilder.Eq("_id", id);
var result = await system_canvases.FindAsync(filter);
DbCanvas c = await result.FirstOrDefaultAsync();
if (c == null)
{
return(null);
}
return(c);
}
private static void SendRPCMessage(DbCanvas c, DbServer server, DbUser u, int tribe_id, RPCPayloadModifyCanvas.RPCPayloadModifyCanvas_CanvasChange change)
{
//Create message
RPCPayloadModifyCanvas msg = new RPCPayloadModifyCanvas
{
action = change,
data = ConvertCanvas(c),
user = new RPCPayloadModifyCanvas_ActorUser
{
icon = u.profile_image_url,
id = u.id,
name = u.screen_name
}
};
//Send RPC message
Program.connection.GetRPC().SendRPCMessageToTribe(LibDeltaSystem.RPC.RPCOpcode.CanvasChange, msg, server, tribe_id);
}
public static async Task OnCanvasRequest(Microsoft.AspNetCore.Http.HttpContext e, DbServer s, DbUser u, int tribe_id, string next)
{
//Find canvas
if (!ObjectId.TryParse(next, out ObjectId id))
{
throw new StandardError("Canvas Not Found", StandardErrorCode.NotFound);
}
DbCanvas c = await Program.connection.LoadCanvasData(id);
if (c == null)
{
throw new StandardError("Canvas Not Found", StandardErrorCode.NotFound);
}
//Get request method
var method = Program.FindRequestMethod(e);
//Act from the method
if (method == RequestHttpMethod.get)
{
//Write response
await Program.QuickWriteJsonToDoc(e, ConvertCanvas(c));
}
else if (method == RequestHttpMethod.post)
{
//Check scope
await Program.CheckTokenScope(u, null);
//Rename the canvas; decode request
CanvasCreateRequest request = Program.DecodePostBody <CanvasCreateRequest>(e);
//Set
await c.RenameCanvas(Program.connection, request.name, request.color);
//Send RPC message
SendRPCMessage(c, s, u, tribe_id, RPCPayloadModifyCanvas.RPCPayloadModifyCanvas_CanvasChange.Modify);
//Write response
await Program.QuickWriteJsonToDoc(e, ConvertCanvas(c));
}
else if (method == RequestHttpMethod.delete)
{
//Check scope
await Program.CheckTokenScope(u, null);
//Delete canvas
await c.DeleteCanvas(Program.connection);
//Send RPC message
SendRPCMessage(c, s, u, tribe_id, RPCPayloadModifyCanvas.RPCPayloadModifyCanvas_CanvasChange.Delete);
//Write response
await Program.QuickWriteJsonToDoc(e, ConvertCanvas(c));
}
else if (method == RequestHttpMethod.put)
{
//Check scope
await Program.CheckTokenScope(u, null);
//We'll update the thumbnail; Decode the request
UpdateThumbnailRequest request = Program.DecodePostBody <UpdateThumbnailRequest>(e);
//Try to find
DbUserContent uc = await Program.connection.GetUserContentByToken(request.token);
if (uc == null)
{
throw new StandardError("Token Not Valid", StandardErrorCode.InvalidInput);
}
if (uc.application_id != CANVAS_THUMBNAIL_APPLICATION_ID)
{
throw new StandardError("Specified User Content Application ID Mismatch", StandardErrorCode.InvalidInput);
}
//Update
await c.SetNewThumbnail(Program.connection, uc);
//Send RPC message
SendRPCMessage(c, s, u, tribe_id, RPCPayloadModifyCanvas.RPCPayloadModifyCanvas_CanvasChange.Modify);
//Write response
await Program.QuickWriteJsonToDoc(e, ConvertCanvas(c));
}
else
{
throw new StandardError("Unexpected method.", StandardErrorCode.BadMethod);
}
}
public static async Task OnListRequest(Microsoft.AspNetCore.Http.HttpContext e, DbServer s, DbUser u, int tribe_id)
{
//Get request method
var method = Program.FindRequestMethod(e);
//If this is a GET, list
if (method == RequestHttpMethod.get)
{
//Find all canvases beloning to this server
List <DbCanvas> canvases = await s.GetServerCanvases(Program.connection);
//Now, convert all
CanvasListResponse response = new CanvasListResponse
{
canvases = new RPCPayloadModifyCanvas_ListedCanvas[canvases.Count],
ws_reconnect_policy = 10000,
ws_url = Program.config.endpoint_canvas
};
for (int i = 0; i < canvases.Count; i++)
{
response.canvases[i] = ConvertCanvas(canvases[i]);
}
//Write response
await Program.QuickWriteJsonToDoc(e, response);
return;
}
else if (method == RequestHttpMethod.post)
{
//Check scope
await Program.CheckTokenScope(u, null);
//We'll create a canvas. Decode the body
CanvasCreateRequest request = Program.DecodePostBody <CanvasCreateRequest>(e);
//Create
DbCanvas c = new DbCanvas
{
color = request.color,
last_edited = DateTime.UtcNow,
last_editor = u._id,
last_saved = DateTime.UtcNow,
name = request.name,
server_id = s.id,
users = new ObjectId[256],
user_index = 0,
version = 0,
_id = ObjectId.GenerateNewId()
};
//Add
await Program.connection.system_canvases.InsertOneAsync(c);
//Send RPC message
SendRPCMessage(c, s, u, tribe_id, RPCPayloadModifyCanvas.RPCPayloadModifyCanvas_CanvasChange.Create);
//Write response
await Program.QuickWriteJsonToDoc(e, ConvertCanvas(c));
}
else
{
throw new StandardError("Unexpected method.", StandardErrorCode.BadMethod);
}
}
