/// <summary>
/// Initializes a new instance of the <see cref="DialogContext"/> class.
/// </summary>
/// <param name="dialogs">Parent dialog set.</param>
/// <param name="turnContext">Context for the current turn of conversation with the user.</param>
/// <param name="state">Current dialog state.</param>
public DialogContext(DialogSet dialogs, ITurnContext turnContext, DialogState state)
{
Dialogs = dialogs ?? throw new ArgumentNullException(nameof(dialogs));
Context = turnContext ?? throw new ArgumentNullException(nameof(turnContext));
Stack = state.DialogStack;
}
public override async Task <DialogTurnResult> DialogBeginAsync(DialogContext dc, DialogOptions options = null, CancellationToken cancellationToken = default(CancellationToken))
{
if (dc == null)
{
throw new ArgumentNullException(nameof(dc));
}
// Start the inner dialog.
var dialogState = new DialogState();
dc.ActiveDialog.State[PersistedDialogState] = dialogState;
var cdc = new DialogContext(_dialogs, dc.Context, dialogState);
var turnResult = await OnDialogBeginAsync(cdc, options, cancellationToken).ConfigureAwait(false);
// Check for end of inner dialog
if (turnResult.HasResult)
{
// Return result to calling dialog
return(await dc.EndAsync(turnResult.Result, cancellationToken).ConfigureAwait(false));
}
else
{
// Just signal end of turn
return(Dialog.EndOfTurn);
}
}
public override async Task <DialogTurnResult> BeginDialogAsync(DialogContext outerDc, object options = null, CancellationToken cancellationToken = default(CancellationToken))
{
if (outerDc == null)
{
throw new ArgumentNullException(nameof(outerDc));
}
// Start the inner dialog.
var dialogState = new DialogState();
outerDc.ActiveDialog.State[PersistedDialogState] = dialogState;
var innerDc = new DialogContext(_dialogs, outerDc.Context, dialogState);
var turnResult = await OnBeginDialogAsync(innerDc, options, cancellationToken).ConfigureAwait(false);
// Check for end of inner dialog
if (turnResult.Status != DialogTurnStatus.Waiting)
{
// Return result to calling dialog
return(await EndComponentAsync(outerDc, turnResult.Result, cancellationToken).ConfigureAwait(false));
}
else
{
// Just signal waiting
return(Dialog.EndOfTurn);
}
}
private static DialogState InitializeDialogState(DialogInstance instance)
{
var dialogState = new DialogState();
instance.State[PersistedDialogState] = dialogState;
return(dialogState);
}
/// <summary>
/// Initializes a new instance of the <see cref="DialogContext"/> class.
/// </summary>
/// <param name="dialogs">Parent dialog set.</param>
/// <param name="parentDialogContext">Parent dialog state.</param>
/// <param name="state">Current dialog state.</param>
public DialogContext(
DialogSet dialogs,
DialogContext parentDialogContext,
DialogState state)
: this(dialogs, parentDialogContext.Context, state)
{
Parent = parentDialogContext ?? throw new ArgumentNullException(nameof(parentDialogContext));
}
/// <summary>
/// Initializes a new instance of the <see cref="DialogContext"/> class from the turn context.
/// </summary>
/// <param name="dialogs">The dialog set to create the dialog context for.</param>
/// <param name="turnContext">The current turn context.</param>
/// <param name="state">The state property from which to retrieve the dialog context.</param>
public DialogContext(DialogSet dialogs, ITurnContext turnContext, DialogState state)
{
Dialogs = dialogs ?? throw new ArgumentNullException(nameof(dialogs));
Context = turnContext ?? throw new ArgumentNullException(nameof(turnContext));
Stack = state.DialogStack;
ObjectPath.SetPathValue(turnContext.TurnState, TurnPath.ACTIVITY, Context.Activity);
}
/// <summary>
/// Initializes a new instance of the <see cref="DialogContext"/> class from Turn context.
/// </summary>
/// <param name="dialogs">dialogset.</param>
/// <param name="turnContext">turn context.</param>
/// <param name="state">dialogState.</param>
public DialogContext(DialogSet dialogs, ITurnContext turnContext, DialogState state)
{
Dialogs = dialogs ?? throw new ArgumentNullException(nameof(dialogs));
Context = turnContext ?? throw new ArgumentNullException(nameof(turnContext));
Stack = state.DialogStack;
State = new DialogStateManager(this);
State.SetValue(TurnPath.ACTIVITY, Context.Activity);
}
/// <summary>
/// Runs dialog system in the context of an ITurnContext.
/// </summary>
/// <param name="context">turn context.</param>
/// <param name="cancellationToken">cancelation token.</param>
/// <returns>result of the running the logic against the activity.</returns>
public async Task <DialogManagerResult> OnTurnAsync(ITurnContext context, CancellationToken cancellationToken = default(CancellationToken))
{
ConversationState conversationState = context.TurnState.Get <ConversationState>() ?? throw new ArgumentNullException($"{nameof(ConversationState)} is not found in the turn context. Have you called adapter.UseState() with a configured ConversationState object?");
UserState userState = context.TurnState.Get <UserState>() ?? throw new ArgumentNullException($"{nameof(UserState)} is not found in the turn context. Have you called adapter.UseState() with a configured UserState object?");
// create property accessors
var lastAccessProperty = conversationState.CreateProperty <DateTime>(LASTACCESS);
var lastAccess = await lastAccessProperty.GetAsync(context, () => DateTime.UtcNow, cancellationToken : cancellationToken).ConfigureAwait(false);
// Check for expired conversation
var now = DateTime.UtcNow;
if (this.ExpireAfter.HasValue && (DateTime.UtcNow - lastAccess) >= TimeSpan.FromMilliseconds((double)this.ExpireAfter))
{
// Clear conversation state
await conversationState.ClearStateAsync(context, cancellationToken : cancellationToken).ConfigureAwait(false);
}
lastAccess = DateTime.UtcNow;
await lastAccessProperty.SetAsync(context, lastAccess, cancellationToken : cancellationToken).ConfigureAwait(false);
// get dialog stack
var dialogsProperty = conversationState.CreateProperty <DialogState>(DIALOGS);
DialogState dialogState = await dialogsProperty.GetAsync(context, () => new DialogState(), cancellationToken : cancellationToken).ConfigureAwait(false);
// Create DialogContext
var dc = new DialogContext(this.dialogSet, context, dialogState);
DialogTurnResult turnResult = null;
if (dc.ActiveDialog == null)
{
// start root dialog
turnResult = await dc.BeginDialogAsync(this.rootDialogId, cancellationToken : cancellationToken).ConfigureAwait(false);
}
else
{
// Continue execution
// - This will apply any queued up interruptions and execute the current/next step(s).
turnResult = await dc.ContinueDialogAsync(cancellationToken : cancellationToken).ConfigureAwait(false);
if (turnResult.Status == DialogTurnStatus.Empty)
{
// restart root dialog
turnResult = await dc.BeginDialogAsync(this.rootDialogId, cancellationToken : cancellationToken).ConfigureAwait(false);
}
}
// send trace of memory
await dc.Context.SendActivityAsync((Activity)Activity.CreateTraceActivity("BotState", "https://www.botframework.com/schemas/botState", dc.GetState().GetMemorySnapshot(), "Bot State")).ConfigureAwait(false);
return(new DialogManagerResult()
{
TurnResult = turnResult
});
}
/// <summary>
/// Initializes a new instance of the <see cref="DialogContext"/> class from the turn context.
/// </summary>
/// <param name="dialogs">The dialog set to create the dialog context for.</param>
/// <param name="turnContext">The current turn context.</param>
/// <param name="state">The state property from which to retrieve the dialog context.</param>
public DialogContext(DialogSet dialogs, ITurnContext turnContext, DialogState state)
{
Dialogs = dialogs ?? throw new ArgumentNullException(nameof(dialogs));
Context = turnContext ?? throw new ArgumentNullException(nameof(turnContext));
Stack = state.DialogStack;
State = new DialogStateManager(this);
Services = new TurnContextStateCollection();
ObjectPath.SetPathValue(turnContext.TurnState, TurnPath.Activity, Context.Activity);
}
/// <summary>
/// Initializes a new instance of the <see cref="DialogContext"/> class.
/// </summary>
/// <param name="dialogs">Parent dialog set.</param>
/// <param name="parentDialogContext">Parent dialog context.</param>
/// <param name="state">Current dialog state.</param>
public DialogContext(
DialogSet dialogs,
DialogContext parentDialogContext,
DialogState state)
: this(dialogs, parentDialogContext.Context, state)
{
Parent = parentDialogContext ?? throw new ArgumentNullException(nameof(parentDialogContext));
if (Parent.Services != null)
{
// copy parent services into this dialogcontext.
foreach (var service in Parent.Services)
{
Services[service.Key] = service.Value;
}
}
}
private DialogContext CreateInnerDc(ITurnContext context, DialogInstance instance)
{
DialogState state;
if (instance.State.ContainsKey(PersistedDialogState))
{
state = instance.State[PersistedDialogState] as DialogState;
}
else
{
state = new DialogState();
instance.State[PersistedDialogState] = state;
}
if (state.DialogStack == null)
{
state.DialogStack = new List <DialogInstance>();
}
return(new DialogContext(this.Dialogs, context, state));
}
private static DialogState BuildDialogState(DialogInstance instance)
{
DialogState state;
if (instance.State.ContainsKey(PersistedDialogState))
{
state = instance.State[PersistedDialogState] as DialogState;
}
else
{
state = new DialogState();
instance.State[PersistedDialogState] = state;
}
if (state.DialogStack == null)
{
state.DialogStack = new List <DialogInstance>();
}
return(state);
}
/// <summary>
/// Runs dialog system in the context of an ITurnContext.
/// </summary>
/// <param name="context">turn context.</param>
/// <param name="cancellationToken">cancelation token.</param>
/// <returns>result of the running the logic against the activity.</returns>
public async Task <DialogManagerResult> OnTurnAsync(ITurnContext context, CancellationToken cancellationToken = default(CancellationToken))
{
var botStateSet = new BotStateSet();
// preload turnstate with DM turnstate
foreach (var pair in this.TurnState)
{
context.TurnState.Set(pair.Key, pair.Value);
}
if (this.ConversationState == null)
{
this.ConversationState = context.TurnState.Get <ConversationState>() ?? throw new ArgumentNullException(nameof(this.ConversationState));
}
else
{
context.TurnState.Set(this.ConversationState);
}
botStateSet.Add(this.ConversationState);
if (this.UserState == null)
{
this.UserState = context.TurnState.Get <UserState>();
}
if (this.UserState != null)
{
botStateSet.Add(this.UserState);
}
// create property accessors
var lastAccessProperty = ConversationState.CreateProperty <DateTime>(LASTACCESS);
var lastAccess = await lastAccessProperty.GetAsync(context, () => DateTime.UtcNow, cancellationToken : cancellationToken).ConfigureAwait(false);
// Check for expired conversation
var now = DateTime.UtcNow;
if (this.ExpireAfter.HasValue && (DateTime.UtcNow - lastAccess) >= TimeSpan.FromMilliseconds((double)this.ExpireAfter))
{
// Clear conversation state
await ConversationState.ClearStateAsync(context, cancellationToken : cancellationToken).ConfigureAwait(false);
}
lastAccess = DateTime.UtcNow;
await lastAccessProperty.SetAsync(context, lastAccess, cancellationToken : cancellationToken).ConfigureAwait(false);
// get dialog stack
var dialogsProperty = ConversationState.CreateProperty <DialogState>(this.dialogStateProperty);
DialogState dialogState = await dialogsProperty.GetAsync(context, () => new DialogState(), cancellationToken : cancellationToken).ConfigureAwait(false);
// Create DialogContext
var dc = new DialogContext(this.Dialogs, context, dialogState);
// get the dialogstatemanager configuration
var dialogStateManager = new DialogStateManager(dc, this.StateConfiguration);
await dialogStateManager.LoadAllScopesAsync(cancellationToken).ConfigureAwait(false);
dc.Context.TurnState.Add(dialogStateManager);
DialogTurnResult turnResult = null;
// Loop as long as we are getting valid OnError handled we should continue executing the actions for the turn.
//
// NOTE: We loop around this block because each pass through we either complete the turn and break out of the loop
// or we have had an exception AND there was an OnError action which captured the error. We need to continue the
// turn based on the actions the OnError handler introduced.
while (true)
{
try
{
if (dc.ActiveDialog == null)
{
// start root dialog
turnResult = await dc.BeginDialogAsync(this.rootDialogId, cancellationToken : cancellationToken).ConfigureAwait(false);
}
else
{
// Continue execution
// - This will apply any queued up interruptions and execute the current/next step(s).
turnResult = await dc.ContinueDialogAsync(cancellationToken : cancellationToken).ConfigureAwait(false);
if (turnResult.Status == DialogTurnStatus.Empty)
{
// restart root dialog
turnResult = await dc.BeginDialogAsync(this.rootDialogId, cancellationToken : cancellationToken).ConfigureAwait(false);
}
}
// turn successfully completed, break the loop
break;
}
catch (Exception err)
{
// fire error event, bubbling from the leaf.
var handled = await dc.EmitEventAsync(DialogEvents.Error, err, bubble : true, fromLeaf : true, cancellationToken : cancellationToken).ConfigureAwait(false);
if (!handled)
{
// error was NOT handled, throw the exception and end the turn. (This will trigger the Adapter.OnError handler and end the entire dialog stack)
throw;
}
}
}
// save all state scopes to their respective botState locations.
await dialogStateManager.SaveAllChangesAsync(cancellationToken).ConfigureAwait(false);
// save botstate changes
await botStateSet.SaveAllChangesAsync(dc.Context, false, cancellationToken).ConfigureAwait(false);
// send trace of memory
var snapshot = dc.GetState().GetMemorySnapshot();
var traceActivity = (Activity)Activity.CreateTraceActivity("BotState", "https://www.botframework.com/schemas/botState", snapshot, "Bot State");
await dc.Context.SendActivityAsync(traceActivity).ConfigureAwait(false);
return(new DialogManagerResult()
{
TurnResult = turnResult
});
}
/// <summary>
/// Runs dialog system in the context of an ITurnContext.
/// </summary>
/// <param name="context">turn context.</param>
/// <param name="state">stored state.</param>
/// <param name="cancellationToken">cancelation token.</param>
/// <returns>result of the running the logic against the activity.</returns>
public async Task <DialogManagerResult> OnTurnAsync(ITurnContext context, PersistedState state = null, CancellationToken cancellationToken = default(CancellationToken))
{
var saveState = false;
var keys = GetKeys(context);
var storage = context.TurnState.Get <IStorage>();
if (state == null)
{
if (storage == null)
{
throw new Exception("DialogManager: unable to load the bots state.Bot.storage not assigned.");
}
state = await LoadStateAsync(storage, keys).ConfigureAwait(false);
saveState = true;
}
// Clone state to preserve original state
var newState = ObjectPath.Clone(state);
// Check for expired conversation
var now = DateTime.UtcNow;
if (this.ExpireAfter.HasValue && newState.ConversationState.ContainsKey(LASTACCESS))
{
var lastAccess = DateTime.Parse(newState.ConversationState[LASTACCESS] as string);
if ((DateTime.UtcNow - lastAccess) >= TimeSpan.FromMilliseconds((double)this.ExpireAfter))
{
// Clear conversation state
state.ConversationState = new Dictionary <string, object>();
state.ConversationState[ETAG] = newState.ConversationState[ETAG];
}
}
newState.ConversationState[LASTACCESS] = DateTime.UtcNow.ToString("u");
// Ensure dialog stack populated
DialogState dialogState;
if (!newState.ConversationState.ContainsKey(DIALOGS))
{
dialogState = new DialogState();
newState.ConversationState[DIALOGS] = dialogState;
}
else
{
dialogState = (DialogState)newState.ConversationState[DIALOGS];
}
var namedScopes = MemoryScope.GetScopesMemory(context);
namedScopes[ScopePath.USER] = newState.UserState;
namedScopes[ScopePath.CONVERSATION] = newState.ConversationState;
namedScopes[ScopePath.TURN] = new Dictionary <string, object>(StringComparer.InvariantCultureIgnoreCase);
// Create DialogContext
var dc = new DialogContext(
this.dialogSet,
context,
dialogState);
DialogTurnResult turnResult = null;
if (dc.ActiveDialog == null)
{
// start root dialog
turnResult = await dc.BeginDialogAsync(this.rootDialogId, cancellationToken : cancellationToken).ConfigureAwait(false);
}
else
{
// Continue execution
// - This will apply any queued up interruptions and execute the current/next step(s).
turnResult = await dc.ContinueDialogAsync(cancellationToken : cancellationToken).ConfigureAwait(false);
if (turnResult.Status == DialogTurnStatus.Empty)
{
// restart root dialog
turnResult = await dc.BeginDialogAsync(this.rootDialogId, cancellationToken : cancellationToken).ConfigureAwait(false);
}
}
// send trace of memory
await dc.Context.SendActivityAsync((Activity)Activity.CreateTraceActivity("BotState", "https://www.botframework.com/schemas/botState", dc.State.GetMemorySnapshot(), "Bot State")).ConfigureAwait(false);
// Save state if loaded from storage
if (saveState)
{
await DialogManager.SaveStateAsync(storage, keys : keys, newState : newState, oldState : state, eTag : "*").ConfigureAwait(false);
return(new DialogManagerResult()
{
TurnResult = turnResult
});
}
else
{
return(new DialogManagerResult()
{
TurnResult = turnResult, NewState = newState
});
}
}
