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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,201 @@ | ||
| import axios, { AxiosRequestConfig } from 'axios'; | ||
| import { QueryClient } from '@tanstack/react-query'; | ||
| import { FeatureCollection, Polygon } from 'geojson'; | ||
| import { ConcurrencyManagerInstance } from './concurrency'; | ||
| import { | ||
| TimelineDataset, | ||
| TimelineDatasetAnalysis, | ||
| TimelineDatasetStatus | ||
| } from './types.d.ts'; | ||
| import { | ||
| combineFeatureCollection, | ||
| getFilterPayload | ||
| } from '$components/analysis/utils'; | ||
|
|
||
| interface DatasetAssetsRequestParams { | ||
| stacCol: string; | ||
| assets: string; | ||
| dateStart: Date; | ||
| dateEnd: Date; | ||
| aoi: FeatureCollection<Polygon>; | ||
| } | ||
|
|
||
| /** | ||
| * Gets the asset urls for all datasets in the results of a STAC search given by | ||
| * the input parameters. | ||
| * | ||
| * @param params Dataset search request parameters | ||
| * @param opts Options for the request (see Axios) | ||
| * @returns Promise with the asset urls | ||
| */ | ||
| async function getDatasetAssets( | ||
| { dateStart, dateEnd, stacCol, assets, aoi }: DatasetAssetsRequestParams, | ||
| opts: AxiosRequestConfig | ||
| ): Promise<{ assets: { date: Date; url: string }[] }> { | ||
| const searchReqRes = await axios.post( | ||
| `${process.env.API_STAC_ENDPOINT}/search`, | ||
| { | ||
| 'filter-lang': 'cql2-json', | ||
| limit: 10000, | ||
| fields: { | ||
| include: [ | ||
| `assets.${assets}.href`, | ||
| 'properties.start_datetime', | ||
| 'properties.datetime' | ||
| ], | ||
| exclude: ['collection', 'links'] | ||
| }, | ||
| filter: getFilterPayload(dateStart, dateEnd, aoi, [stacCol]) | ||
| }, | ||
| opts | ||
| ); | ||
|
|
||
| return { | ||
| assets: searchReqRes.data.features.map((o) => ({ | ||
| date: new Date(o.properties.start_datetime || o.properties.datetime), | ||
| url: o.assets[assets].href | ||
| })) | ||
| }; | ||
| } | ||
|
|
||
| interface TimeseriesRequesterParams { | ||
| start: Date; | ||
| end: Date; | ||
| aoi: FeatureCollection<Polygon>; | ||
| dataset: TimelineDataset; | ||
| queryClient: QueryClient; | ||
| concurrencyManager: ConcurrencyManagerInstance; | ||
| onProgress: (data: TimelineDatasetAnalysis) => void; | ||
| } | ||
|
|
||
| /** | ||
| * Gets the statistics for the given dataset within the given time range and | ||
| * area of interest. | ||
| */ | ||
| export async function requestDatasetTimeseriesData({ | ||
| start, | ||
| end, | ||
| aoi, | ||
| dataset, | ||
| queryClient, | ||
| concurrencyManager, | ||
| onProgress | ||
| }: TimeseriesRequesterParams) { | ||
| const datasetData = dataset.data; | ||
| const datasetAnalysis = dataset.analysis; | ||
|
|
||
| const id = datasetData.id; | ||
|
|
||
| onProgress({ | ||
| status: TimelineDatasetStatus.LOADING, | ||
| error: null, | ||
| data: null, | ||
| meta: {} | ||
| }); | ||
|
|
||
| try { | ||
| const layerInfoFromSTAC = await concurrencyManager.queue( | ||
| `${id}-analysis`, | ||
| () => { | ||
| return queryClient.fetchQuery( | ||
| ['analysis', 'dataset', id, aoi, start, end], | ||
| ({ signal }) => | ||
| getDatasetAssets( | ||
| { | ||
| stacCol: datasetData.stacCol, | ||
| assets: datasetData.sourceParams?.assets || 'cog_default', | ||
| aoi, | ||
| dateStart: start, | ||
| dateEnd: end | ||
| }, | ||
| { signal } | ||
| ), | ||
| { | ||
| staleTime: Infinity | ||
| } | ||
| ); | ||
| } | ||
| ); | ||
|
|
||
| const { assets } = layerInfoFromSTAC; | ||
|
|
||
| onProgress({ | ||
| status: TimelineDatasetStatus.LOADING, | ||
| error: null, | ||
| data: null, | ||
| meta: { | ||
| total: assets.length, | ||
| loaded: 0 | ||
| } | ||
| }); | ||
|
|
||
| let loaded = 0; | ||
|
|
||
| const layerStatistics = await Promise.all( | ||
| assets.map(async ({ date, url }) => { | ||
| const statistics = await concurrencyManager.queue( | ||
| `${id}-analysis-asset`, | ||
| () => { | ||
| return queryClient.fetchQuery( | ||
| ['analysis', id, 'asset', url, aoi], | ||
| async ({ signal }) => { | ||
| const { data } = await axios.post( | ||
| `${process.env.API_RASTER_ENDPOINT}/cog/statistics?url=${url}`, | ||
| // Making a request with a FC causes a 500 (as of 2023/01/20) | ||
| combineFeatureCollection(aoi), | ||
| { signal } | ||
| ); | ||
| return { | ||
| date, | ||
| ...data.properties.statistics.b1 | ||
| }; | ||
| }, | ||
| { | ||
| staleTime: Infinity | ||
| } | ||
| ); | ||
| } | ||
| ); | ||
|
|
||
| onProgress({ | ||
| status: TimelineDatasetStatus.LOADING, | ||
| error: null, | ||
| data: null, | ||
| meta: { | ||
| total: assets.length, | ||
| loaded: ++loaded | ||
| } | ||
| }); | ||
|
|
||
| return statistics; | ||
| }) | ||
| ); | ||
|
|
||
| onProgress({ | ||
| status: TimelineDatasetStatus.SUCCESS, | ||
| meta: { | ||
| total: assets.length, | ||
| loaded: assets.length | ||
| }, | ||
| error: null, | ||
| data: { | ||
| timeseries: layerStatistics | ||
| } | ||
| }); | ||
| } catch (error) { | ||
| // Discard abort related errors. | ||
| if (error.revert) return; | ||
|
|
||
| // Cancel any inflight queries. | ||
| queryClient.cancelQueries({ queryKey: ['analysis', id] }); | ||
| // Remove other requests from the queue. | ||
| concurrencyManager.dequeue(`${id}-analysis-asset`); | ||
|
|
||
| onProgress({ | ||
| ...datasetAnalysis, | ||
| status: TimelineDatasetStatus.ERROR, | ||
| error, | ||
| data: null | ||
| }); | ||
| } | ||
| } |
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