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Published 21 months ago • Latest: 3.0.1
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Define and run hierarchical state machines in Dart and Flutter.

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3.0.0-dev.13 #

  • Add TransitionContext.redirectTo.
  • Change default PostMessageErrorPolicy to rethrowError.
  • Adjust logging and add TreeStateMachine.enableDeveloperLogging.
  • Fix error when the destination of MessageContext.goTo is the current leaf state.

3.0.0-dev.12 #

  • Adjust TreeStateFilter to make it easier to extend.
  • Add MachineStateKey to identify machine states.

3.0.0-dev.11 #

  • Expose InitialStateData

3.0.0-dev.10 #

  • Significant reorganization of builder classes (again). Added delegate_builders library.
  • Require a DataStateKey when accessing state data. Lookups by type alone are no longer supported.
  • MessageContext.data and TransitionContext.data no longer can return a null value.
  • Remove declarative_builders library. It will be moved to a tree_state_builders library.

3.0.0-dev.9 #

  • Change type of key parameter of DeclarativeStateTreeBuilder.machineState to DataStateKey<NestedMachineData>

3.0.0-dev.8 #

  • Expose TreeNodeBuildInfo from NodeBuildInfoBuilder (should have been in previous release)

3.0.0-dev.7 #

  • Add extendNodes parameter to TreeBuildContext constructor allowing metadata and filters to be applied to tree nodes as they are constructed.
  • Rename TreeStateMachine.fromTreeBuilder -> TreeStateMachine.withTreeBuilder
  • Add methods to TreeNodeInfoNavigationExtensions to traverse TreeNodeInfo hierarchy.

3.0.0-dev.6 #

  • Significant reorganization of builder classes. tree_builders library is split into build and declarative_builders libraries.
  • Rename logName -> logSuffix in TreeStateMachine constructor.

3.0.0-dev.5 #

  • Adjust parameter order of StateTreeBuilder.withRoot and StateTreeBuilder.withDataRoot
  • Add ValueSubject.mapValueStream.
  • Change return type of TreeStateMachine.lifecycle to ValueStream, and remove redundant getters for specific lifecycle states.
  • Change return type of TreeStateMachine.loadFrom to Future<CurrentState>.
  • Add metadata to TransistionContext and MessageContext.goTo.

3.0.0-dev.4 #

  • Add TreeStateMachine.currentState.

3.0.0-dev.3 #

  • Add TreeStateMachine.isStarting.
  • Add TreeNodeInfo.getChildren.
  • Experimental: Add TreeStateMachine.rootNode.

3.0.0-dev.2 #

  • The initialState parameter of the StateTreeBuilder constructor was renamed to initialChild to reduce developer confusion, and the error message was improved when this parameter refers to an invalid state.
  • StateTreeDefinitionError is thrown when validating a StateTreeBuilder, instead of [StateError].
  • Remove TreeStateMachine.startWith and add optional named params to TreeStateMachine.start. Having two start type methods might be confusing.
  • Adjust parameters of the following to be DataStateKey, not StateKey:
    • TreeStateMachine.dataStream
    • CurrentState.data
    • CurrentState.dataValue
    • MessageContext.data
    • TransitionContext.data
  • Rename CurrentState.data -> CurrentState.dataStream.
  • Add TreeStateFilter.
  • Add leafState, handlingState, and activeStates to MessageContext.
  • Add handlingState to TransitionContext.
  • Rename MessageContext.appData -> MessageContext.metadata.

3.0.0-dev.1 #

  • Upgrade to Dart3 SDK
  • Add DataStateKey to emphasize association between a data state and its state data type.
  • Add TreeStateMachine.startWith to enable starting a state machine with specific initial values. for data states.

2.4.0 #

  • Fix issue with MessageHandlerWhenBuilder not evaluating multiple conditions correctly.
  • Fix issue with MessageHandlerBuilder.action not evaluating actionResult parameter correctly.

2.3.0 #

  • Rename NestedMachineData.nestedState -> NestedMachineData.nestedCurrentState.
  • Add label property to TreeStateMachine and TreeStateBuilder for debugging purposes.
  • Improve messages when an error occurs entering a channel.

2.2.1 #

  • Add action parameter to enterChannel builder method.

2.2.0 #

  • Add support for rethrowing exceptions with PostMessageErrorPolicy.
  • Fix bug where data streams for void data states might not be completed when state exits.
  • Add StreamCombineLatest.

2.1.1 #

  • Add const Channel constructor.
  • Add rootKey prop to StateTreeBuilder
  • Add handling of void state data.
  • Additional API documentation.

2.0.1 #

  • Adjustments and internal simplifications of tree_builders library.
  • Add support for final data states.
  • Add nested state machines.
  • Adjust logging so that log messages can be named to reflect the state machine that emits them.

1.0.3 #

  • Package updates to improve pub.flutter-io.cn score.
  • Add logging when timers are canceled.

1.0.2 #

  • Add more tests and documentation.
  • Adjust signature of schedule methods to emphasize that the message function is called each time the timer elapses.

1.0.1 #

  • Initial version.

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Define and run hierarchical state machines in Dart and Flutter.

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async, collection, logging

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