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fix(loader-utils): ReadableFile implementation to match the interface #3157

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merged 2 commits into from
Nov 8, 2024
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fix(loader-utils): ReadableFile implementation to match the interface #3157

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ReadableFile implementation to match the interface
dariaterekhova-actionengine Nov 5, 2024
7bfa377
Review corrections
dariaterekhova-actionengine Nov 6, 2024
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5 changes: 2 additions & 3 deletions examples-experimental/slpk-in-browser/src/app.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -11,9 +11,8 @@ import {MapController, FlyToInterpolator, MapViewState} from '@deck.gl/core/type
import {COORDINATE_SYSTEM, I3SLoader, parseSLPKArchive} from '@loaders.gl/i3s';
import {Tileset3D} from '@loaders.gl/tiles';
import {ControlPanel} from './components/control-panel';
import {BrowserFile} from './browser-file';
import {ZipFileSystem} from '@loaders.gl/zip';
import {LoaderWithParser} from '@loaders.gl/loader-utils';
import {BlobFile, FileProvider, LoaderWithParser} from '@loaders.gl/loader-utils';
import CustomTile3DLayer from './custom-tile-3d-layer';

export const TRANSITION_DURAITON = 4000;
Expand Down Expand Up @@ -49,7 +48,7 @@ export default function App() {
}

const createFileSystem = async (file: File) => {
const fileProvider = new BrowserFile(file);
const fileProvider = await FileProvider.create(new BlobFile(file));
const archive = await parseSLPKArchive(fileProvider, undefined, file.name);
const fileSystem = new ZipFileSystem(archive);
setFileSystem(fileSystem);
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132 changes: 0 additions & 132 deletions examples-experimental/slpk-in-browser/src/browser-file.ts
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2 changes: 1 addition & 1 deletion examples-experimental/slpk-in-browser/vite.config.ts
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Expand Up @@ -14,7 +14,7 @@ const getAliases = async (frameworkName, frameworkRootDir) => {

// https://vitejs.dev/config/
export default defineConfig(async () => ({
resolve: {alias: await getAliases('@loaders.gl', `${__dirname}/../../..`)},
resolve: {alias: await getAliases('@loaders.gl', `${__dirname}/../..`)},
server: {open: true}
}))

6 changes: 4 additions & 2 deletions modules/loader-utils/src/lib/files/blob-file.ts
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Expand Up @@ -30,8 +30,10 @@ export class BlobFile implements ReadableFile {
};
}

async read(start: number, length: number): Promise<ArrayBuffer> {
const arrayBuffer = await this.handle.slice(start, start + length).arrayBuffer();
async read(start?: number | bigint, length?: number): Promise<ArrayBuffer> {
const arrayBuffer = await this.handle
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Why this change?

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I faced a problem when I have ReadableFile as input in FileProvider and read() there accepts start as number | bigint so I pass bigint here and get runtime error that it cannot sum bigint and number because real implementation knows nothing about bigint. We need keep real implementation of the methods matching it's description in ReadableFile

.slice(Number(start), Number(start) + Number(length))
.arrayBuffer();
return arrayBuffer;
}
}
2 changes: 1 addition & 1 deletion modules/loader-utils/src/lib/files/http-file.ts
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Expand Up @@ -30,7 +30,7 @@ export class HttpFile implements ReadableFile {
};
}

async read(offset: number | bigint, length: number): Promise<ArrayBuffer> {
async read(offset: number | bigint = 0, length: number = 0): Promise<ArrayBuffer> {
const response = await this.fetchRange(offset, length);
const arrayBuffer = await response.arrayBuffer();
return arrayBuffer;
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2 changes: 1 addition & 1 deletion modules/loader-utils/src/lib/files/node-file-facade.ts
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Expand Up @@ -25,7 +25,7 @@ export class NodeFileFacade implements ReadableFile, WritableFile {
throw new Error('Can\'t instantiate NodeFile. Make sure to import @loaders.gl/polyfills first.');
}
/** Read data */
async read(start?: number | bigint, end?: number | bigint): Promise<ArrayBuffer> {
async read(start?: number | bigint, length?: number): Promise<ArrayBuffer> {
throw NOT_IMPLEMENTED;
}
/** Write to file. The number of bytes written will be returned */
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