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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| // loaders.gl | ||
| // SPDX-License-Identifier: MIT | ||
| // Copyright (c) vis.gl contributors | ||
|
|
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| import {Schema, GeoJSONTable} from '@loaders.gl/schema'; | ||
| import type { | ||
| VectorSourceProps, | ||
| VectorSourceMetadata, | ||
| GetFeaturesParameters, | ||
| LoaderWithParser | ||
| } from '@loaders.gl/loader-utils'; | ||
| import {Source, VectorSource} from '@loaders.gl/loader-utils'; | ||
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| import {FlatGeobufLoader} from './flatgeobuf-loader'; | ||
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| /** | ||
| * @ndeprecated This is a WIP, not fully implemented | ||
| * @see https://developers.arcgis.com/rest/services-reference/enterprise/feature-service.htm | ||
| */ | ||
| export const FlatGeobufSource = { | ||
| name: 'FlatGeobuf', | ||
| id: 'flatgeobuf-server', | ||
| module: 'wms', | ||
| version: '0.0.0', | ||
| extensions: [], | ||
| mimeTypes: [], | ||
| options: { | ||
| url: undefined!, | ||
| 'flatgeobuf-server': { | ||
| /** Tabular loaders, normally the GeoJSONLoader */ | ||
| loaders: [] | ||
| } | ||
| }, | ||
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| type: 'flatgeobuf-server', | ||
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| testURL: (url: string): boolean => url.toLowerCase().includes('FeatureServer'), | ||
| createDataSource: (url, props: FlatGeobufVectorSourceProps): FlatGeobufVectorSource => | ||
| new FlatGeobufVectorSource(props) | ||
| } as const satisfies Source<FlatGeobufVectorSource, FlatGeobufVectorSourceProps>; | ||
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| export type FlatGeobufVectorSourceProps = VectorSourceProps & { | ||
| url: string; | ||
| 'flatgeobuf-server'?: { | ||
| loaders: LoaderWithParser[]; | ||
| }; | ||
| }; | ||
|
|
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| /** | ||
| * ArcGIS ImageServer | ||
| * Note - exports a big API, that could be exposed here if there is a use case | ||
| * @see https://developers.arcgis.com/rest/services-reference/enterprise/feature-service.htm | ||
| */ | ||
| export class FlatGeobufVectorSource extends VectorSource<FlatGeobufVectorSourceProps> { | ||
| data: string; | ||
| url: string; | ||
| protected formatSpecificMetadata: Promise<any> | null = null; | ||
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| constructor(props: FlatGeobufVectorSourceProps) { | ||
| super(props); | ||
| this.data = props.url; | ||
| this.url = props.url; | ||
| // this.formatSpecificMetadata = this._getFormatSpecificMetadata(); | ||
| } | ||
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| /** TODO - not yet clear if we can find schema information in the FeatureServer metadata or if we need to request a feature */ | ||
| async getSchema(): Promise<Schema> { | ||
| await this.getMetadata({formatSpecificMetadata: true}); | ||
| return {metadata: {}, fields: []}; | ||
| } | ||
|
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| async getMetadata(options: {formatSpecificMetadata}): Promise<VectorSourceMetadata> { | ||
| // Wait for raw metadata to load | ||
| if (!this.formatSpecificMetadata) { | ||
| // this.formatSpecificMetadata = await this._getFormatSpecificMetadata(); | ||
| } | ||
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| // const metadata = parseFlatGeobufMetadata(this.formatSpecificMetadata); | ||
|
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| // Only add the big blob of source metadata if explicitly requested | ||
| if (options.formatSpecificMetadata) { | ||
| // metadata.formatSpecificMetadata = this.formatSpecificMetadata; | ||
| } | ||
| // @ts-expect-error | ||
| return {}; | ||
| } | ||
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| async getFeatures(parameters: GetFeaturesParameters): Promise<GeoJSONTable> { | ||
| const response = await this.fetch(this.url); | ||
| const arrayBuffer = await response.arrayBuffer(); | ||
| // TODO - hack - done to avoid pulling in selectLoader from core | ||
|
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| const table = await FlatGeobufLoader.parse(arrayBuffer, {}); | ||
| // const loader = this.props['flatgeobuf-server']?.loaders?.[0]; | ||
| // const table = loader?.parse(arrayBuffer); | ||
| return table as GeoJSONTable; | ||
| } | ||
| } |
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