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

Flowtype linting rules for ESLint by flow-typed

const schema = [
  {
    enum: ['always', 'never'],
    type: 'string',
  },
];

const create = (context) => {
  const always = (context.options[0] || 'always') === 'always';
  const sourceCode = context.getSourceCode();

  return {
    ObjectTypeAnnotation(node) {
      const {
        exact,
        indexers,
        inexact,
      } = node;

      if (!['DeclareClass', 'InterfaceDeclaration'].includes(node.parent.type) && always && !exact && !inexact && indexers.length === 0) {
        context.report({
          fix: (fixer) => [
            fixer.replaceText(sourceCode.getFirstToken(node), '{|'),
            fixer.replaceText(sourceCode.getLastToken(node), '|}'),
          ],
          message: 'Object type must be exact.',
          node,
        });
      }

      if (!always && exact) {
        context.report({
          fix: (fixer) => [
            fixer.replaceText(sourceCode.getFirstToken(node), '{'),
            fixer.replaceText(sourceCode.getLastToken(node), '}'),
          ],
          message: 'Object type must not be exact.',
          node,
        });
      }
    },
  };
};

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