private static T GetControlData <T>(ComponentContainer child, StandAloneFormSessionInfo info)
{
string name = child.DataName ?? child.ComponentId;
return((T)Array.Find(info.InitialControlsData,
data => data.Name.Equals(name))?.OutputValue);
}
private Grid RenderGrid(ComponentContainer decisionsGrid, StandAloneFormSessionInfo info)
{
Grid grid = new Grid
{
Margin = decisionsGrid.MarginTop,
RowSpacing = decisionsGrid.RowGap,
ColumnSpacing = decisionsGrid.ColumnGap
};
foreach (GridLayoutPart row in decisionsGrid.Rows)
{
grid.RowDefinitions.Add(new RowDefinition
{
Height = new GridLength(row.RequestedSize, FormUtils.GetGridUnitType(row.LayoutType))
});
}
foreach (GridLayoutPart col in decisionsGrid.Columns)
{
grid.ColumnDefinitions.Add(new ColumnDefinition
{
Width = new GridLength(col.RequestedSize, FormUtils.GetGridUnitType(col.LayoutType))
});
}
foreach (ChildElement element in decisionsGrid.Children)
{
View view = null;
if (element.Child.ServerType.Contains("GridLayout") || element.Child.ServerType.Contains("SilverVerticalStack") || element.Child.ServerType.Contains("SilverHorizontalStack"))
{
view = RenderLayout(element.Child, info);
}
else
{
FormControlWrapper control = FormUtils.GetComponentView(element, info);
view = control.View;
// track elements by id:
controls.Add(element.Child.ComponentId, control);
// add any button handlers also during this iteration:
if (control.GetType().Equals(typeof(ButtonControl)))
{
AddButtonHandler((ButtonControl)control);
}
else if (control.GetType().Equals(typeof(ImageButtonControl)))
{
AddImageButtonHandler((ImageButtonControl)control);
}
}
grid.Children.Add(view, element.Column, element.Row);
Grid.SetColumnSpan(view, element.ColumnSpan);
Grid.SetRowSpan(view, element.RowSpan);
}
return(grid);
}
private static bool GetRadioData <T>(ComponentContainer child, StandAloneFormSessionInfo info)
{
string name = child.ComponentId ?? child.DataName;
//return (T)Array.Find(info.InitialControlsData,
//data => data.Name.Equals(name)).OutputValue;
return(true);
}
public static TimePicker GetTimePicker(ComponentContainer child, StandAloneFormSessionInfo info)
{
TimePicker timePicker = new TimePicker();
string timeString = GetControlData <string>(child, info);
var span = ParseTime(timeString);
timePicker.Time = span;
return(timePicker);
}
public static Entry GetEntry(ComponentContainer child, StandAloneFormSessionInfo info)
{
string text = string.Empty, placeholder = string.Empty;
Keyboard keyboard = Keyboard.Default;
if (child.ServerType.Contains("SilverNumberBox"))
{
keyboard = Keyboard.Numeric;
object t = GetControlData <object>(child, info);
if (t != null)
{
if (child.OutputType == (byte)NumberBoxOutputType.Int)
{
int val = Convert.ToInt32(t);
if (val != 0)
{
placeholder = text = val.ToString();
}
else
{
placeholder = "0";
}
}
else
{
double val = Convert.ToDouble(t);
if (val != 0)
{
placeholder = text = val.ToString();
}
else
{
placeholder = "0";
}
}
}
}
else
{
text = GetControlData <string>(child, info);
}
Entry entry = new Entry()
{
// Text = child.Text,
Text = text,
Placeholder = placeholder,
Keyboard = keyboard,
IsPassword = child.ServerType.Contains("SilverPasswordBox")
//TextColor = GetColor(silverLabel.Attributes.LabelColor),
};
return(entry);
}
public static CheckBoxView GetCheckBox(ComponentContainer child, StandAloneFormSessionInfo info)
{
CheckBoxView checkBox = new CheckBoxView()
{
IsChecked = GetControlData <bool>(child, info),
Text = child.DataName
};
return(checkBox);
}
public static RadioButton GetRadioButton(ComponentContainer child, StandAloneFormSessionInfo info)
{
RadioButton radioButton = new RadioButton()
{
IsChecked = GetRadioData <bool>(child, info)
//BackgroundColor silverButton.
};
return(radioButton);
}
public static Button GetImageButton(ComponentContainer child, StandAloneFormSessionInfo info)
{
Button imagebtn = new Button()
{
ImageSource = ImageSource.FromUri(new Uri(GetImageButtonData(child, info))),
BackgroundColor = Color.Transparent
};
return(imagebtn);
}
public static Image GetImage(ComponentContainer child, StandAloneFormSessionInfo info)
{
Image image = new Image()
{
Source = GetImageData <string>(child, info),
//BackgroundColor silverButton.
};
return(image);
}
/// <summary>
/// View Model for showing a single form or page.
/// </summary>
public FormViewModel(StandAloneFormSessionInfo formInfo, FlowExecutionStateInstruction instruction, bool canRunOffline = false, string serviceCategoryId = "")
{
FormInfo = formInfo;
Title = instruction.FormTitle ?? instruction.StepName;
FlowTrackingId = instruction.FlowTrackingId;
StepTrackingId = instruction.StepTrackingId;
FlowId = instruction.FlowId;
CanRunOffline = canRunOffline;
ServiceCategoryId = serviceCategoryId;
}
public static DataPair GetSelectedPickerOption(ComponentContainer child, StandAloneFormSessionInfo info, DataPair[] options)
{
var pair = Array.Find(info.InitialControlsData,
data => data.Name.Equals(child.SelectedItemDataNameKey));
JArray outputValue = (JArray)pair.OutputValue;
var tokens = outputValue.ToArray();
var selectedId = tokens.Length > 0 ? tokens.First().ToString() : "";
return(Array.Find(options, option => option.Name.Equals(selectedId)));
}
public static Editor GetEditor(ComponentContainer child, StandAloneFormSessionInfo info)
{
Editor editor = new Editor()
{
Text = GetControlData <string>(child, info),
//TextColor = GetColor(silverLabel.Attributes.LabelColor),
};
return(editor);
}
public static Label GetLabel(ComponentContainer child, StandAloneFormSessionInfo info)
{
Label label = new Label()
{
Text = child.Text,
HorizontalTextAlignment = GetLabelHorizontalAlign(child.LabelAlignment),
VerticalTextAlignment = GetLabelVerticalAlign(child.LabelVerticalAlignment),
//TextColor = GetColor(silverLabel.Attributes.LabelColor),
};
return(label);
}
public static Slider GetSlider(ComponentContainer child, StandAloneFormSessionInfo info)
{
Slider slider = new Slider()
{
Minimum = child.Min ?? 0,
Maximum = child.Max ?? 1,
Value = GetControlData <double>(child, info),
MaximumTrackColor = (Color)Application.Current.Resources["LightTextColor"]
};
return(slider);
}
public static Xamarin.Forms.Switch GetToggle(ComponentContainer child, StandAloneFormSessionInfo info)
{
Xamarin.Forms.Switch Switch = new Xamarin.Forms.Switch()
{
IsToggled = GetToggleData <bool>(child, info)
// Text = child.Text,m
// Text = GetControlData<string>(child, info)
//TextColor = GetColor(silverLabel.Attributes.LabelColor),
};
return(Switch);
}
public static DatePicker GetDatePicker(ComponentContainer child, StandAloneFormSessionInfo info)
{
DatePicker datePicker = new DatePicker();
string dateString = GetControlData <string>(child, info);
if (DateTime.TryParse(dateString, out DateTime date))
{
datePicker.Date = date;
}
else
{
Console.Write($"Unable to parse date-string for control {child.DataName}");
}
return(datePicker);
}
private static string GetImageData <T>(ComponentContainer child, StandAloneFormSessionInfo info)
{
string name = child.ComponentId ?? child.ComponentName;
string sessionid = info.FormSessionInfoId;
string gen = Array.Find(info.InitialControlsData,
data => data.Name.Equals(name)).OutputValue.ToString();
var uriTask = RestConstants.GetUriAsync("FormService", "GetFileStream?");
uriTask.Wait();
string url = uriTask.Result.AbsoluteUri +
$"formSessionInfoId={sessionid}&componentId={name}&fileId=silverimagefile&downloadFile=true&gen={gen}";
return(url);
}
private async void ShowNextForm(FlowExecutionStateInstruction instruction)
{
// get the form JSON
StandAloneFormSessionInfo formModel = await FormService.GetFormSessionSurfaceJson(instruction, useNamedSession);
FormViewModel formViewModel = new FormViewModel(formModel, instruction);
if (formModel == null)
{
await DisplayAlert("Error", "Problem loading form data.", "OK");
return;
}
InitModel(formViewModel);
RenderForm(formModel);
}
// holdover from initial "offline" proof of concept, for reference.
//private StandAloneFormSessionInfo LoadForm()
//{
// // testing this as synchronous... because aysnc was swallowing errors...
// StandAloneFormSessionInfo formList = ((FormsDataStore)viewModel.DataStore).GetGridSample() as StandAloneFormSessionInfo;
// StandAloneFormSessionInfo info = formList; // derrrrrpp
// RenderForm(info);
// return info;
//}
private void RenderForm(StandAloneFormSessionInfo info)
{
// initialize collection:
controls = new Dictionary <string, FormControlWrapper>();
// root container:
ComponentContainer container = info.FormSurface.RootContainer;
if (container.ServerType.Contains("SilverHorizontalStack"))
{
((ScrollView)Content).HorizontalOptions = LayoutOptions.Fill;
((ScrollView)Content).Orientation = ScrollOrientation.Horizontal;
}
((ScrollView)Content).Content = RenderLayout(container, info);
// tell the sever we're done loading the form;
_ = FormService.FormLoadComplete(info.FormSessionInfoId);
}
public static DataPair[] GetRadioButtonListOptions(ComponentContainer child, StandAloneFormSessionInfo info)
{
child.DataName = null;
var obj = GetControlData <object>(child, info);
var arrayOfObject = ((IEnumerable)obj).Cast <object>().ToArray();
var dict = new Dictionary <string, string>();
DataPair[] options = new DataPair[arrayOfObject.Length];
// it's giving me such casting trouble here, because
// these are still NewtonSoft Json objects, so we need to re-deserilze them
for (int i = 0; i < arrayOfObject.Length; i++)
{
var stringObj = JsonConvert.SerializeObject(arrayOfObject[i]);
options[i] = JsonConvert.DeserializeObject <DataPair>(stringObj);
}
return(options);
}
private StackLayout RenderStackLayout(ComponentContainer decisionsLayout, StandAloneFormSessionInfo info, StackOrientation orientation)
{
StackLayout layout = new StackLayout
{
Orientation = orientation,
};
foreach (var element in decisionsLayout.Children)
{
View view = null;
if (element.Child.ServerType.Contains("GridLayout") || element.Child.ServerType.Contains("SilverVerticalStack") || element.Child.ServerType.Contains("SilverHorizontalStack"))
{
view = RenderLayout(element.Child, info);
}
else
{
FormControlWrapper control = FormUtils.GetComponentView(element, info);
view = control.View;
// track elements by id:
controls.Add(element.Child.ComponentId, control);
// add any button handlers also during this iteration:
if (control.GetType().Equals(typeof(ButtonControl)))
{
AddButtonHandler((ButtonControl)control);
}
else if (control.GetType().Equals(typeof(ImageButtonControl)))
{
AddImageButtonHandler((ImageButtonControl)control);
}
}
if (orientation == StackOrientation.Horizontal)
{
view.VerticalOptions = LayoutOptions.Start;
}
layout.Children.Add(view);
}
return(layout);
}
private View RenderLayout(ComponentContainer container, StandAloneFormSessionInfo info)
{
if (container.ServerType.Contains("GridLayout"))
{
return(RenderGrid(container, info));
}
else if (container.ServerType.Contains("SilverHorizontalStack"))
{
return(RenderStackLayout(container, info, StackOrientation.Horizontal));
}
else if (container.ServerType.Contains("SilverVerticalStack"))
{
return(RenderStackLayout(container, info, StackOrientation.Vertical));
}
else
{
return(new Grid());
}
}
private async void CreateAccount_Clicked(object sender, EventArgs e)
{
_viewModel.SetIsBusy(true);
btnCreateAccount.IsEnabled = false;
FlowExecutionStateInstruction instruction = await FlowExecutionService.StartFlowWithData(RestConstants.CreateAccountFlowId, new DataPair[0], true);
if (instruction == null)
{
_viewModel.SetIsBusy(false);
btnCreateAccount.IsEnabled = true;
Debug.WriteLine("Flow Execution Instruction was null");
return;
}
if (FlowExecutionService.IsShowFormType(instruction))
{
// get the form JSON
StandAloneFormSessionInfo formModel = await FormService.GetFormSessionSurfaceJson(instruction, true);
// launch the view to render the form:
FormViewModel formViewModel;
formViewModel = new FormViewModel(formModel, instruction);
if (formModel == null)
{
_viewModel.SetIsBusy(false);
btnCreateAccount.IsEnabled = true;
await DisplayAlert("Error", "Problem loading form data.", "OK");
return;
}
await Navigation.PushAsync(new FormPage(formViewModel, true));
}
else
{
// throw a modal that the flow has been started
await DisplayAlert("Workflow", $"Flow for Account creation has been started", "OK");
}
btnCreateAccount.IsEnabled = true;
_viewModel.SetIsBusy(false);
}
// TODO dry these methods up with a good generic...
public static async Task <StandAloneFormSessionInfo> GetFormSessionSurfaceJson(FlowExecutionStateInstruction instruction, bool useNamedSession = false)
{
Uri uri = await RestConstants.GetUriAsync(SERVICE_URL, "GetFormSessionSurfaceJson");
try
{
FormServiceRequestBody requestBody = new FormServiceRequestBody
{
UserContext = useNamedSession ? new UserContext(RestConstants.NamedSessionId) : await AuthService.Instance.GetUserContextAsync(),
FormSessionInfoId = instruction.FormSessionId
};
var serializedBody = RestConstants.SerializeBody(requestBody);
HttpClient httpClient = new HttpClient();
var response = await httpClient.PostAsync(uri, serializedBody);
if (response.IsSuccessStatusCode)
{
var responseBody = await response.Content.ReadAsStringAsync();
var resultWrapper = JsonConvert.DeserializeObject <GetFormSessionSurfaceJsonResponse>(responseBody);
// we need $type field to specify component type in form data
// NewtonJson can't deserialize field which starts with '$', so we needed to replace it to get correct deserialization.
resultWrapper.GetFormSessionSurfaceJsonResult = resultWrapper.GetFormSessionSurfaceJsonResult.Replace("$type", "__type");
StandAloneFormSessionInfo info = JsonConvert.DeserializeObject <StandAloneFormSessionInfo>(
resultWrapper.GetFormSessionSurfaceJsonResult);
return(info);
}
}
catch (Exception ex)
{
Debug.WriteLine(@" ERROR {0}", ex.Message);
}
return(null);
}
async void OnItemSelected(object sender, SelectedItemChangedEventArgs args)
{
if (!(args.SelectedItem is Models.Workflow workflow))
{
return;
}
viewModel.SetIsBusy(true); // show loader in case fetching action takes time
if (Connectivity.NetworkAccess == NetworkAccess.Internet)
{
WorkFlowAction action = await(viewModel.DataStore as WorkflowStore).GetWorkflowActionAsync(workflow);
Debug.WriteLine(action);
// see if it's a flow we can run:
if (action?.RunFlowId != null)
{
FlowExecutionStateInstruction instruction = await FlowExecutionService.StartFlowWithData(action.RunFlowId, new DataPair[0]);
if (instruction == null)
{
Debug.WriteLine("Flow Execution Instruction was null");
DoneLaunching();
return;
}
if (FlowExecutionService.IsShowFormType(instruction))
{
// get the form JSON
StandAloneFormSessionInfo formModel = await FormService.GetFormSessionSurfaceJson(instruction);
// launch the view to render the form:
FormViewModel formViewModel;
if (workflow.CanRunOffline)
{
formViewModel = new FormViewModel(formModel, instruction, true, workflow.ServiceCatalogId);
}
else
{
formViewModel = new FormViewModel(formModel, instruction);
}
if (formModel == null)
{
await DisplayAlert("Error", "Problem loading form data.", "OK");
DoneLaunching();
return;
}
DoneLaunching();
await Navigation.PushAsync(new FormPage(formViewModel));
}
else
{
// throw a modal that the flow has been started
DoneLaunching();
await DisplayAlert("Workflow", $"Flow for {workflow.EntityName} has been started", "OK");
}
return;
}
// Otherwise, try to embed the result in a web-view
var actionuUrl = action.WebViewUrl;
viewModel.SetIsBusy(false);
if (string.IsNullOrEmpty(actionuUrl))
{
await DisplayAlert("Alert", "No valid action was found for this item", "OK");
return;
}
// Manually deselect item.
WorkflowListView.SelectedItem = null;
await Navigation.PushAsync(new DoWorkflowPage(workflow, actionuUrl));
}
else
{
// get the form JSON
var formInfos = await OfflineService.Instance.GetStandAloneFormSessionInfoAsync(workflow.ServiceCatalogId);
if (formInfos == null || formInfos.Count <= 0)
{
await DisplayAlert("Error", "Problem loading form data.", "OK");
DoneLaunching();
return;
}
StandAloneFormSessionInfo formModel = formInfos[0];
FlowExecutionStateInstruction instruction = new FlowExecutionStateInstruction
{
FormTitle = workflow.EntityName
};
FormViewModel formViewModel;
if (workflow.CanRunOffline)
{
formViewModel = new FormViewModel(formModel, instruction, true, workflow.ServiceCatalogId);
}
else
{
formViewModel = new FormViewModel(formModel, instruction);
}
DoneLaunching();
await Navigation.PushAsync(new FormPage(formViewModel));
}
}
// TODO fix these Child -> ChildChild names...
public static FormControlWrapper GetComponentView(ChildElement element, StandAloneFormSessionInfo info)
{
ComponentContainer child = element.Child;
if (child.ServerType.Contains("SilverImage"))
{
switch (child.ComponentName)
{
case "Image":
return(new ImageControl(element, GetImage(child, info)));
case "Image Button":
return(new ImageButtonControl(element, GetImageButton(child, info)));
}
// Textbox maps to Image https://docs.microsoft.com/en-us/dotnet/api/xamarin.forms.Image
}
if (child.ServerType.Contains("SilverToggleButton"))
{
// https://docs.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/checkbox
return(new ToggleControl(element, GetToggle(child, info)));
}
/*
* if (child.ComponentName.Contains("RadioButton"))
* {
* // Textbox maps to RadioButton https://docs.microsoft.com/en-us/dotnet/api/xamarin.forms.RadioButton
* return new RadioButtonControl(element, GetRadioButton(child, info));
* }
*/
if (child.ServerType.Contains("SilverRadioButtonList"))
{
var options = GetRadioButtonListOptions(child, info);
var selectedOption = GetSelectedRadioButtonListOption(child, info, options);
var control = new RadioListControl(element, GetRadioButtonListView(child, options), options);
if (selectedOption != null)
{
control.SetSelected(selectedOption);
}
return(control);
}
if (child.ServerType.Contains("SilverButton"))
{
// Button maps to Button https://docs.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/button
return(new ButtonControl(element, GetButton(child)));
}
if (child.ServerType.Contains("SilverLabel"))
{
// Label maps to Label https://docs.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/text/label
return(new LabelControl(element, GetLabel(child, info)));
}
if (child.ServerType.Contains("SilverTextArea,"))
{
// Text Area gets mapped to Editor https://docs.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/text/editor
return(new TextAreaControl(element, GetEditor(child, info)));
}
if (child.ServerType.Contains("SilverDatePicker"))
{
// Datepicker https://docs.microsoft.com/en-us/dotnet/api/xamarin.forms.datepicker
return(new DateControl(element, GetDatePicker(child, info)));
}
if (child.ServerType.Contains("SilverTimePicker"))
{
// TimePicker https://docs.microsoft.com/en-us/dotnet/api/xamarin.forms.timepicker
return(new TimePickerControl(element, GetTimePicker(child, info)));
}
if (child.ServerType.Contains("SilverTextBox"))
{
// Textbox maps to Entry https://docs.microsoft.com/en-us/dotnet/api/xamarin.forms.entry
return(new TextBoxControl(element, GetEntry(child, info)));
}
if (child.ServerType.Contains("SilverNumberBox"))
{
return(new TextBoxControl(element, GetEntry(child, info)));
}
if (child.ServerType.Contains("SilverCheckBox"))
{
// Textbox maps to Checkbox https://docs.microsoft.com/en-us/dotnet/api/xamarin.forms.Checkbox
return(new CheckBoxControl(element, GetCheckBox(child, info)));
}
//if (child.ComponentName.Replace(" ", string.Empty) == "ImageButton")
//{
// return new ImageButtonControl(element, GetImageButton(child, info));
//}
if (child.ServerType.Contains("SilverCombo"))
{
// Dropdown maps to https://docs.microsoft.com/en-us/dotnet/api/xamarin.forms.picker
var options = GetPickerOptions(child, info);
var selectedOption = GetSelectedPickerOption(child, info, options);
var control = new ComboControl(element, GetPicker(child, options), options);
if (selectedOption != null)
{
control.SetSelected(selectedOption);
}
return(control);
}
if (child.ServerType.Contains("SilverSlider"))
{
return(new SliderControl(element, GetSlider(child, info)));
}
// Slider https://docs.microsoft.com/en-us/dotnet/api/xamarin.forms.slider
// Checkbox maps to Checkbox https://docs.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/checkbox
if (child.ServerType.Contains("SilverPasswordBox"))
{
return(new TextBoxControl(element, GetEntry(child, info)));
}
return(new LabelControl(element,
new Label()
{
Text = "Not yet implemented."
}
));
}
private static string GetImageButtonData(ComponentContainer child, StandAloneFormSessionInfo info)
{
return(ImageHelper.GetImageInfoUrl(child.ImageInfo));
}