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2021-04-02 02:24:13 +03:00

75 lines
3.4 KiB
JavaScript

import { Platform } from '@unimodules/core';
import path from 'path-browserify';
import { PixelRatio } from 'react-native';
import URL from 'url-parse';
import AssetSourceResolver from './AssetSourceResolver';
import { manifestBaseUrl, getManifest } from './PlatformUtils';
// Fast lookup check if asset map has any overrides in the manifest
const assetMapOverride = getManifest().assetMapOverride;
/**
* Selects the best file for the given asset (ex: choosing the best scale for images) and returns
* a { uri, hash } pair for the specific asset file.
*
* If the asset isn't an image with multiple scales, the first file is selected.
*/
export function selectAssetSource(meta) {
// Override with the asset map in manifest if available
if (assetMapOverride && assetMapOverride.hasOwnProperty(meta.hash)) {
meta = { ...meta, ...assetMapOverride[meta.hash] };
}
// This logic is based on that of AssetSourceResolver, with additional support for file hashes and
// explicitly provided URIs
const scale = AssetSourceResolver.pickScale(meta.scales, PixelRatio.get());
const index = meta.scales.findIndex(s => s === scale);
const hash = meta.fileHashes ? meta.fileHashes[index] || meta.fileHashes[0] : meta.hash;
// Allow asset processors to directly provide the URL to load
const uri = meta.fileUris ? meta.fileUris[index] || meta.fileUris[0] : meta.uri;
if (uri) {
return { uri: resolveUri(uri), hash };
}
// Check if the assetUrl was overridden in the manifest
const assetUrlOverride = getManifest().assetUrlOverride;
if (assetUrlOverride) {
const uri = path.join(assetUrlOverride, hash);
return { uri: resolveUri(uri), hash };
}
const fileScale = scale === 1 ? '' : `@${scale}x`;
const fileExtension = meta.type ? `.${encodeURIComponent(meta.type)}` : '';
const suffix = `/${encodeURIComponent(meta.name)}${fileScale}${fileExtension}?platform=${encodeURIComponent(Platform.OS)}&hash=${encodeURIComponent(meta.hash)}`;
// For assets with a specified absolute URL, we use the existing origin instead of prepending the
// development server or production CDN URL origin
if (/^https?:\/\//.test(meta.httpServerLocation)) {
const uri = meta.httpServerLocation + suffix;
return { uri, hash };
}
// For assets during development, we use the development server's URL origin
if (getManifest().developer) {
const baseUrl = new URL(getManifest().bundleUrl);
baseUrl.set('pathname', meta.httpServerLocation + suffix);
return { uri: baseUrl.href, hash };
}
// Production CDN URIs are based on each asset file hash
return {
uri: `https://d1wp6m56sqw74a.cloudfront.net/~assets/${encodeURIComponent(hash)}`,
hash,
};
}
/**
* Resolves the given URI to an absolute URI. If the given URI is already an absolute URI, it is
* simply returned. Otherwise, if it is a relative URI, it is resolved relative to the manifest's
* base URI.
*/
export function resolveUri(uri) {
if (!manifestBaseUrl) {
return uri;
}
const { protocol } = new URL(uri);
if (protocol !== '') {
return uri;
}
const baseUrl = new URL(manifestBaseUrl);
const resolvedPath = uri.startsWith('/') ? uri : path.join(baseUrl.pathname, uri);
baseUrl.set('pathname', resolvedPath);
return baseUrl.href;
}
//# sourceMappingURL=AssetSources.js.map