diff --git a/s_whiteboard.js b/s_whiteboard.js index bc3b3b2..72a9cf4 100644 --- a/s_whiteboard.js +++ b/s_whiteboard.js @@ -1,6 +1,7 @@ //This file is only for saving the whiteboard. (Not to a file, only to RAM atm. Whiteboard is gone after server restart) var savedBoards = {}; +var savedUndos = {}; module.exports = { handleEventsAndData: function (content) { var tool = content["t"]; //Tool witch is used @@ -8,19 +9,46 @@ module.exports = { var username = content["username"]; if (tool === "clear") { //Clear the whiteboard delete savedBoards[wid]; + delete savedUndos[wid]; } else if (tool === "undo") { //Undo an action + if (!savedUndos[wid]) { + savedUndos[wid] = []; + } if (savedBoards[wid]) { for (var i = savedBoards[wid].length - 1; i >= 0; i--) { if (savedBoards[wid][i]["username"] == username) { var drawId = savedBoards[wid][i]["drawId"]; for (var i = savedBoards[wid].length - 1; i >= 0; i--) { if (savedBoards[wid][i]["drawId"] == drawId && savedBoards[wid][i]["username"] == username) { + savedUndos[wid].push(savedBoards[wid][i]); savedBoards[wid].splice(i, 1); } } break; } } + if(savedUndos[wid].length > 1000) { + savedUndos[wid].splice(0, savedUndos[wid].length - 1000); + } + } + } else if (tool === "redo") { + if (!savedUndos[wid]) { + savedUndos[wid] = []; + } + if (!savedBoards[wid]) { + savedBoards[wid] = []; + } + for (var i = savedUndos[wid].length - 1; i >= 0; i--) { + if (savedUndos[wid][i]["username"] == username) { + var drawId = savedUndos[wid][i]["drawId"]; + for (var i = savedUndos[wid].length - 1; i >= 0; i--) { + if (savedUndos[wid][i]["drawId"] == drawId && savedUndos[wid][i]["username"] == username) { + savedBoards[wid].push(savedUndos[wid][i]); + savedUndos[wid].splice(i, 1); + } + } + break; + } } } else if (["line", "pen", "rect", "circle", "eraser", "addImgBG", "recSelect", "eraseRec", "addTextBox", "setTextboxText", "removeTextbox", "setTextboxPosition", "setTextboxFontSize", "setTextboxFontColor"].includes(tool)) { //Save all this actions if (!savedBoards[wid]) {