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dannyrb/machine.js

Created June 12, 2020 20:56
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  1. dannyrb created this gist Jun 12, 2020.
    152 changes: 152 additions & 0 deletions machine.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,152 @@
    const machineConfiguration = {
    id: 'measurementTracking',
    initial: 'idle',
    context: {
    trackedStudy: '',
    trackedSeries: [],
    },
    states: {
    off: {
    type: 'final',
    },
    idle: {
    entry: 'clearContext',
    on: {
    TRACK_SERIES: 'promptBeginTracking',
    },
    },
    promptBeginTracking: {
    invoke: {
    src: 'promptBeginTracking',
    onDone: [
    {
    target: 'tracking',
    actions: ['setTrackedStudyAndSeries'],
    cond: 'promptAccepted',
    },
    {
    target: 'off',
    cond: 'promptDeclined',
    },
    {
    target: 'idle',
    },
    ],
    onError: {
    target: 'idle',
    },
    },
    },
    tracking: {
    on: {
    TRACK_SERIES: [
    {
    target: 'promptTrackNewStudy',
    cond: 'isNewStudy',
    },
    {
    target: 'promptTrackNewSeries',
    cond: 'isNewSeries',
    },
    ],
    UNTRACK_SERIES: [
    {
    target: 'tracking',
    actions: ['removeTrackedSeries'],
    cond: 'hasRemainingTrackedSeries',
    },
    {
    target: 'idle',
    },
    ],
    },
    },
    promptTrackNewStudy: {
    invoke: {
    src: 'promptTrackNewStudy',
    onDone: [
    {
    target: 'tracking',
    actions: ['setTrackedStudyAndSeries'],
    cond: 'promptAccepted',
    },
    {
    target: 'tracking',
    },
    ],
    onError: {
    target: 'idle',
    },
    },
    },
    promptTrackNewSeries: {
    invoke: {
    src: 'promptTrackNewSeries',
    onDone: [
    {
    target: 'tracking',
    actions: ['addTrackedSeries'],
    cond: 'promptAccepted',
    },
    {
    target: 'tracking',
    },
    ],
    onError: {
    target: 'idle',
    },
    },
    },
    },
    strict: true,
    };

    const defaultOptions = {
    services: {
    promptBeginTracking: (ctx, evt) => {
    // return { userResponse, StudyInstanceUID, SeriesInstanceUID }
    },
    promptTrackNewStudy: (ctx, evt) => {
    // return { userResponse, StudyInstanceUID, SeriesInstanceUID }
    },
    promptTrackNewSeries: (ctx, evt) => {
    // return { userResponse, StudyInstanceUID, SeriesInstanceUID }
    },
    },
    actions: {
    clearContext: assign({
    trackedStudy: '',
    trackedSeries: [],
    }),
    // Promise resolves w/ `evt.data.*`
    setTrackedStudyAndSeries: assign((ctx, evt) => ({
    trackedStudy: evt.data.StudyInstanceUID,
    trackedSeries: [evt.data.SeriesInstanceUID],
    })),
    addTrackedSeries: assign((ctx, evt) => ({
    trackedSeries: [...ctx.trackedSeries, evt.data.SeriesInstanceUID],
    })),
    removeTrackedSeries: assign((ctx, evt) => ({
    trackedSeries: ctx.trackedSeries
    .slice()
    .filter(ser => ser !== evt.SeriesInstanceUID),
    })),
    },
    guards: {
    promptAccepted: (ctx, evt) => evt.data && evt.data.userResponse === 1,
    promptCanceled: (ctx, evt) => evt.data && evt.data.userResponse === 0,
    promptDeclined: (ctx, evt) => evt.data && evt.data.userResponse === -1,
    // Has more than 1, or SeriesInstanceUID is not in list
    // --> Post removal would have non-empty trackedSeries array
    hasRemainingTrackedSeries: (ctx, evt) =>
    ctx.trackedSeries.length > 1 ||
    !ctx.trackedSeries.includes(evt.SeriesInstanceUID),
    isNewStudy: (ctx, evt) => ctx.trackedStudy !== evt.StudyInstanceUID,
    isNewSeries: (ctx, evt) =>
    !ctx.trackedSeries.includes(evt.SeriesInstanceUID),
    },
    };

    const measurementTrackingMachine = Machine( machineConfiguration,
    defaultOptions
    );