@coorpacademy/progression-engine/es/compute-next-step/index.js

import checkAnswer from '../check-answer';

import computeNextStep from './compute-next-step';

export const computeInitialStep = (config, availableContent) => {
  const initialStep = computeNextStep(config, null, availableContent, null);
  if (!initialStep) {
    return null;
  }

  const { nextContent, instructions } = initialStep;
  return {
    type: 'move',
    payload: {
      instructions,
      nextContent
    }
  };
};

export const computeNextStepAfterAnswer = (config, state, availableContent, currentSlide, action) => {
  const answerIsCorrect = action.payload.godMode || checkAnswer(config, currentSlide.question, action.payload.answer);

  const actionWithIsCorrect = {
    type: 'answer',
    payload: {
      answer: action.payload.answer,
      content: action.payload.content,
      godMode: action.payload.godMode,
      isCorrect: answerIsCorrect
    }
  };

  const stepResult = computeNextStep(config, state, availableContent, actionWithIsCorrect);
  if (!stepResult) {
    return null;
  }

  const { nextContent, instructions, isCorrect } = stepResult;
  return {
    type: 'answer',
    payload: {
      answer: action.payload.answer,
      content: action.payload.content,
      godMode: action.payload.godMode,
      nextContent,
      isCorrect,
      instructions
    }
  };
};

export const computeNextStepOnAcceptExtraLife = (config, state, availableContent) => {
  const partialAction = { type: 'extraLifeAccepted' };

  const stepResult = computeNextStep(config, state, availableContent, partialAction);

  if (!stepResult) {
    return null;
  }

  const { nextContent, instructions } = stepResult;
  return {
    type: 'extraLifeAccepted',
    payload: {
      content: { ref: 'extraLife', type: 'node' },
      nextContent,
      instructions
    }
  };
};

export const computeNextStepOnRefuseExtraLife = (config, state) => {
  return {
    type: 'extraLifeRefused',
    payload: {
      content: { ref: 'extraLife', type: 'node' },
      nextContent: { ref: 'failExitNode', type: 'failure' }
    }
  };
};
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