atom-nuclide/resources/eslint-plugin-nuclide-internal/import-type-style.js

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'use strict';
/* @noflow */

/*
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the license found in the LICENSE file in
 * the root directory of this source tree.
 */

/* NON-TRANSPILED FILE */
/* eslint-disable babel/func-params-comma-dangle, prefer-object-spread/prefer-object-spread */

const DEFAULT_TYPE_POSTFIX = 'Type';

function endWithTypePostfix(value) {
  return value.length > DEFAULT_TYPE_POSTFIX.length &&
    value.lastIndexOf(DEFAULT_TYPE_POSTFIX) === value.length - DEFAULT_TYPE_POSTFIX.length;
}

module.exports = function(context) {
  function checkIdentifier(ident) {
    if (!endWithTypePostfix(ident.name)) {
      context.report({
        node: ident,
        data: {suggest: ident.name + DEFAULT_TYPE_POSTFIX},
        message: 'Import type should be aliased as {{suggest}}',
      });
    }
  }

  return {
    ImportNamespaceSpecifier(node) {
      if (node.parent.importKind !== 'type') {
        return;
      }
      checkIdentifier(node.local);
    },
    ImportSpecifier(node) {
      if (node.parent.importKind !== 'type') {
        return;
      }
      if (!node.imported || node.local.name === node.imported.name) {
        return;
      }
      checkIdentifier(node.local);
    },
  };
};