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RN local-cli: format and @flow filterPlatformAssetScales

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Summary: Preparation before using that from elsewhere that's already typed.

Reviewed By: cpojer

Differential Revision: D5678616

fbshipit-source-id: 01ef6e688241e07ae9ce6aba27c6d4980f6a688b
This commit is contained in:
Jean Lauliac 2017-08-22 09:06:53 -07:00 committed by Facebook Github Bot
parent 4aae843ebb
commit 0a4085b77c
1 changed files with 11 additions and 4 deletions
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15
local-cli/bundle/filterPlatformAssetScales.js
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@ -5,23 +5,30 @@
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @flow
* @format
*/
'use strict';
const ALLOWED_SCALES = {
ios: [1, 2, 3],
};
function filterPlatformAssetScales(platform, scales) {
function filterPlatformAssetScales(
platform: string,
scales: $ReadOnlyArray<number>,
): $ReadOnlyArray<number> {
const whitelist = ALLOWED_SCALES[platform];
if (!whitelist) {
return scales;
}
const result = scales.filter(scale => whitelist.indexOf(scale) > -1);
if (result.length === 0 && scales.length > 0) {
// No matching scale found, but there are some available. Ideally we don't want to
// be in this situation and should throw, but for now as a fallback let's just use
// the closest larger image
// No matching scale found, but there are some available. Ideally we don't
// want to be in this situation and should throw, but for now as a fallback
// let's just use the closest larger image
const maxScale = whitelist[whitelist.length - 1];
for (const scale of scales) {
if (scale > maxScale) {