linc-profile-generic-react/dist/strategy.js

'use strict';

const semver = require('semver');

const pickInits = deps => {
  const inits = [];
  if (deps['react-loadable']) {
    inits.push('react-loadable');
  }
  return inits;
};

const pickRouter = deps => {
  if (deps['react-router']) {
    if (semver.lt(deps['react-router'], '4.0.0')) {
      return 'react-router-v3';
    } else {
      return 'react-router-v4';
    }
  } else if (deps['react-router-dom']) {
    return 'react-router-v4';
  } else {
    return 'config-router';
  }
};

const pickStatePromise = deps => {
  if (deps['redux']) {
    return 'promiseCounter';
  } else {
    return 'config-state';
  }
};

const pickPreRenders = deps => {
  const preRenders = [];
  if (deps['react-loadable']) {
    preRenders.push('react-loadable');
  }
  if (deps['react-redux']) {
    preRenders.push('react-redux');
  }
  if (deps['styled-components']) {
    if (deps['babel-plugin-styled-components']) {
      preRenders.push('styled-components');
    } else {
      throw new Error('Need to install "babel-plugin-styled-components" to be able to Server-Side Render styled-components');
    }
  }
  return preRenders;
};

const pickRenderer = deps => {
  if (deps['react']) {
    if (semver.lt(deps['react'], '16.0.0')) {
      return 'react15';
    } else {
      return 'react16';
    }
  } else {
    throw new Error('Only support react in this profile for now');
  }
};

const pickAfterRenders = deps => {
  const afterRenders = [];
  if (deps['react-loadable']) {
    afterRenders.push('react-loadable');
  }
  if (deps['styled-components']) {
    afterRenders.push('styled-components');
  }
  if (deps['react-helmet']) {
    afterRenders.push('react-helmet');
  }
  return afterRenders;
};

const getLibs = strategy => {
  const list = Object.keys(strategy).reduce((list, elem) => {
    return list.concat(strategy[elem]);
  }, []);
  return list.filter((item, pos, self) => self.indexOf(item) == pos);
};

const createStrategy = deps => {
  try {
    const strategy = {};
    strategy.inits = pickInits(deps);
    strategy.router = pickRouter(deps);
    strategy.render = pickRenderer(deps);
    strategy.getStatePromise = pickStatePromise(deps);
    strategy.preRenders = pickPreRenders(deps);
    strategy.afterRenders = pickAfterRenders(deps);
    strategy.libs = getLibs(strategy);
    return strategy;
  } catch (e) {
    console.error("We couldn't automatically figure out what plugins to use");
    console.error(e.message);
    process.exit(-1);
  }
};

module.exports = createStrategy;
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