eslint-plugin-ft-flow/dist/rules/objectTypeDelimiter.js.flow

Flowtype linting rules for ESLint by flow-typed

// ported from babel/flow-object-type; original author: Nat Mote
// https://github.com/babel/eslint-plugin-babel/blob/c0a49d25a97feb12c1d07073a0b37317359a5fe5/rules/flow-object-type.js

const SEMICOLON = {
  char: ';',
  name: 'semicolon',
};

const COMMA = {
  char: ',',
  name: 'comma',
};

const create = (context) => {
  let GOOD;
  let BAD;

  if (!context.options[0] || context.options[0] === COMMA.name) {
    GOOD = COMMA;
    BAD = SEMICOLON;
  } else {
    GOOD = SEMICOLON;
    BAD = COMMA;
  }

  const requireProperPunctuation = (node) => {
    const sourceCode = context.getSourceCode();
    const tokens = sourceCode.getTokens(node);
    let lastToken;

    lastToken = tokens[tokens.length - 1];
    if (lastToken.type !== 'Punctuator'
        || !(lastToken.value === SEMICOLON.char
          || lastToken.value === COMMA.char)) {
      const parentTokens = sourceCode.getTokens(node.parent);

      lastToken = parentTokens[parentTokens.indexOf(lastToken) + 1];
    }

    if (lastToken.type === 'Punctuator' && lastToken.value === BAD.char) {
      context.report({
        fix(fixer) {
          return fixer.replaceText(lastToken, GOOD.char);
        },
        message: `Prefer ${GOOD.name}s to ${BAD.name}s in object and class types`,
        node: lastToken,
      });
    }
  };

  return {
    ObjectTypeCallProperty: requireProperPunctuation,
    ObjectTypeIndexer: requireProperPunctuation,
    ObjectTypeProperty: requireProperPunctuation,
  };
};

const schema = [
  {
    enum: ['semicolon', 'comma'],
    type: 'string',
  },
];

export default {
  create,
  meta: {
    fixable: 'code',
    schema,
  },
};