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--- sample_code:visitor_log [2014/10/19 10:50]
stevegarman Set to Landscape
+++ sample_code:visitor_log [2014/12/07 05:05]
@@ Line 1: / Line 1: @@
-====== Visitor log ======
-This is the first working draft of a visitor sign-in log for my workplace.
-The live version includes more error-checking for signing out, extra code to deal with the possibility that the app is left running over midnight and a fair bit of prettying up.
-===== The code =====
-<code javascript visitors.js>
-//Visitor sign-in app by Steve Garman
-//saves one day's data as a JSON string in a file
-//Global variables
-var recArray = [], fileFolder = "/sdcard/sjgApps/", jsonPath;
-//Global layouts and controls
-var scrollr, layScroll, edtName, edtOrg, edtVehicle,edtReason;
-//Called when application is started.
-function OnStart(){
-  if( ! app.IsTablet()) app.SetOrientation("Landscape");
-  //file variables
-  var d = new Date();
-  jsonPath = fileFolder + "vistorBook" +
-     d.toISOString().slice(0,10).replace(/-/g,"_")
-     + ".json";
-  app.MakeFolder(fileFolder)
-  //Create main layout.
-  var lay = app.CreateLayout( "linear", "Left" );
-  //Create a scroller and add it to main layout
-  scrollr = app.CreateScroller( 1.0, 0.8 );
-  lay.AddChild( scrollr );
-  //Create a layout inside scroller.
-  layScroll = app.CreateLayout( "Linear", "Left");
-  scrollr.AddChild( layScroll );
-  //Create a sign-in layout
-  var layNew = app.CreateLayout( "linear", "Horizontal,Left");
-  edtName = app.CreateTextEdit("", .16);
-  edtName.SetHint("Name");
-  layNew.AddChild(edtName);
-  edtOrg = app.CreateTextEdit("", .16);
-  edtOrg.SetHint("Organization");
-  layNew.AddChild(edtOrg);
-  edtVehicle = app.CreateTextEdit("", .16);
-  edtVehicle.SetHint("Vehicle reg.");
-  layNew.AddChild(edtVehicle);
-  edtReason = app.CreateTextEdit("", .16);
-  edtReason.SetHint("Reason for visit");
-  layNew.AddChild(edtReason);
-  var btnCreate = app.CreateButton("Ok");
-  btnCreate.SetOnTouch(btnCreate_OnClick);
-  layNew.AddChild(btnCreate);
-  //Add sign-in layout to main layout
-  lay.AddChild(layNew);
-  //Add main layout to app.
-  app.AddLayout( lay );
-  //check if today's visitor book already active.
-  if(app.FileExists(jsonPath)){
-    loadJSONfile();
-  }
-}//OnStart
-function btnCreate_OnClick( ){
-  app.HideKeyboard();
-  var name = edtName.GetText();
-  var org = edtOrg.GetText();
-  var reg = edtVehicle.GetText();
-  var reason = edtReason.GetText();
-  //check required fields
-  var errs = "";
-  if ( name == "" ) errs = "'Name' ";
-  if ( reason == "" ) errs = errs + "'Reason for visit' ";
-  if ( errs != ""){
-    //bail out
-    app.Alert( errs + "cannot be empty");
-    return;
-  }
-  // clear sign-in form for next visitor
-  edtName.SetText("");
-  edtOrg.SetText("");
-  edtVehicle.SetText("");
-  edtReason.SetText("");
-  // create a record
-  var obj = {};
-  obj.name = name;
-  obj.org = org;
-  obj.reg = reg;
-  obj.reason = reason;
-  var d = new Date();
-  obj.timeIn = d.toTimeString().slice(0,5);
-  obj.timeOut = "Out";
-  // add this record to the array
-  recArray.push( obj );
-  saveJSONfile();
-  // display record on scroller
-  layScroll.AddChild( recordLayout(obj) );
-  scrollr.ScrollTo(0, layScroll.GetHeight());
-}//btnCreate_OnClick
-function btnOut_OnClick( ){
-  //has this visitor already signed out?
-  if (this.GetText() != "Out") return;
-  //not yet, so record time out
-  var d = new Date();
-  this.obj.timeOut = d.toTimeString().slice(0,5);
-  this.SetText(this.obj.timeOut);
-  //update copy of recArray on file
-  saveJSONfile();
-}//btnOut_OnClick
-function recordLayout(obj){
-  //create a new horizontal layout to display this record
-  var newlay = app.CreateLayout( "Linear", "Horizontal,FillXY" );
-  var txt = app.CreateText(obj.name, 0.15);
-  newlay.AddChild(txt);
-  txt = app.CreateText(obj.org, 0.15);
-  newlay.AddChild(txt);
-  txt = app.CreateText(obj.reg, 0.15);
-  newlay.AddChild(txt);
-  txt = app.CreateText(obj.reason, 0.15);
-  newlay.AddChild(txt);
-  txt = app.CreateText(obj.timeIn, 0.15);
-  newlay.AddChild(txt);
-  var btn = app.CreateButton(obj.timeOut, 0.15);
-  btn.obj = obj;
-  btn.SetOnTouch(btnOut_OnClick);
-  newlay.AddChild(btn);
-  return newlay;
-}//recordLayout
-function saveJSONfile(){
-  //update copy of recArray on file
-  var s = JSON.stringify(recArray);
-  app.WriteFile(jsonPath, s )
-}//saveJSONfile
-function loadJSONfile(){
-  //read copy of recArray from file
-  var s = app.ReadFile(jsonPath)
-  recArray = JSON.parse(s)
-  var len = recArray.length;
-  for (var i=0; i<len;i++){
-    var obj = recArray[i];
-    layScroll.AddChild( recordLayout(obj) );
-  }
-  scrollr.ScrollTo(0, layScroll.GetHeight());
-}//loadJSONfile
-</code>
-===== Notes =====
-This app was designed for a tablet. It is a replacement for an old paper form and is designed to be similar.
-The final version is in use on a 7-inch tablet, which is mainly kept in landscape mode, though sometimes they rotate the tablet to make it easier to log-out a visitor who is way back the list.
-At the suggestion of Jorge Ramirez, I have set the orientation to Landscape if it is being used on a phone.
-The final version includes code to save previous files to a network server and the internal code to deal with date/time is significantly more robust, so that visitors who have not been logged out can be copied across to the live list as part of the backup process.

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