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Fis.ts
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Fis.ts
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import axios, { AxiosRequestConfig } from 'axios';
import moment from 'moment';
import WKT from 'terraformer-wkt-parser';
import { RequestConfiguration } from '../utils/cancelRequests';
import { CRS_EPSG4326, CRS_WGS84, findCrsFromUrn } from '../crs';
import { AbstractLayer } from '../layer/AbstractLayer';
import { AbstractSentinelHubV1OrV2Layer } from '../layer/AbstractSentinelHubV1OrV2Layer';
import { AbstractSentinelHubV3Layer } from '../layer/AbstractSentinelHubV3Layer';
import { FisPayload, FisResponse, GetStatsParams, HistogramType } from '../layer/const';
import { CACHE_CONFIG_NOCACHE } from '../utils/cacheHandlers';
import { getAxiosReqParams } from '../utils/cancelRequests';
import { StatisticsProvider } from './StatisticsProvider';
import { StatisticalApiResponse } from './const';
export class Fis implements StatisticsProvider {
public getStatistics(): Promise<StatisticalApiResponse> {
throw new Error('Method not implemented.');
}
private createFISPayload(
layer: AbstractSentinelHubV3Layer | AbstractSentinelHubV1OrV2Layer,
params: GetStatsParams,
): FisPayload {
if (!params.geometry) {
throw new Error('Parameter "geometry" needs to be provided');
}
if (!params.resolution) {
throw new Error('Parameter "resolution" needs to be provided');
}
if (!params.fromTime || !params.toTime) {
throw new Error('Parameters "fromTime" and "toTime" need to be provided');
}
const payload: FisPayload = {
layer: layer.getLayerId(),
crs: params.crs ? params.crs.authId : CRS_EPSG4326.authId,
geometry: WKT.convert(params.geometry),
time: `${moment.utc(params.fromTime).format('YYYY-MM-DDTHH:mm:ss') + 'Z'}/${moment
.utc(params.toTime)
.format('YYYY-MM-DDTHH:mm:ss') + 'Z'}`,
resolution: undefined,
bins: params.bins || 5,
type: HistogramType.EQUALFREQUENCY,
...layer.getStatsAdditionalParameters(),
};
if (params.geometry.crs) {
const selectedCrs = findCrsFromUrn(params.geometry.crs.properties.name);
payload.crs = selectedCrs.authId;
}
// When using CRS=EPSG:4326 or CRS_WGS84 one has to add the "m" suffix to enforce resolution in meters per pixel
if (payload.crs === CRS_EPSG4326.authId || payload.crs === CRS_WGS84.authId) {
payload.resolution = params.resolution + 'm';
} else {
payload.resolution = params.resolution;
}
if (layer.getEvalscript()) {
if (typeof window !== 'undefined' && window.btoa) {
payload.evalscript = btoa(layer.getEvalscript());
} else {
payload.evalscript = Buffer.from(layer.getEvalscript(), 'utf8').toString('base64');
}
if (layer instanceof AbstractSentinelHubV1OrV2Layer) {
payload.evalsource = layer.getEvalsource();
}
}
return payload;
}
private convertFISResponse(data: any): FisResponse {
// convert date strings to Date objects
for (let channel in data) {
data[channel] = data[channel].map((dailyStats: any) => ({
...dailyStats,
date: new Date(dailyStats.date),
}));
}
return data;
}
public async getStats(
layer: AbstractLayer,
params: GetStatsParams,
reqConfig?: RequestConfiguration,
): Promise<FisResponse> {
if (layer instanceof AbstractSentinelHubV3Layer) {
return this.handleV3(layer, params, reqConfig);
} else if (layer instanceof AbstractSentinelHubV1OrV2Layer) {
return this.handleV1orV2(layer, params, reqConfig);
} else {
throw new Error('Not supported');
}
}
private async handleV3(
layer: AbstractSentinelHubV3Layer,
params: GetStatsParams,
reqConfig?: RequestConfiguration,
): Promise<FisResponse> {
const payload: FisPayload = this.createFISPayload(layer, params);
const axiosReqConfig: AxiosRequestConfig = {
...getAxiosReqParams(reqConfig, CACHE_CONFIG_NOCACHE),
};
const shServiceHostname = layer.getShServiceHostname();
const { data } = await axios.post(
shServiceHostname + 'ogc/fis/' + layer.getInstanceId(),
payload,
axiosReqConfig,
);
return this.convertFISResponse(data);
}
private async handleV1orV2(
layer: AbstractSentinelHubV1OrV2Layer,
params: GetStatsParams,
reqConfig?: RequestConfiguration,
): Promise<FisResponse> {
const payload: FisPayload = this.createFISPayload(layer, params);
const { data } = await axios.get(layer.dataset.shServiceHostname + 'v1/fis/' + layer.getInstanceId(), {
params: payload,
...getAxiosReqParams(reqConfig, CACHE_CONFIG_NOCACHE),
});
return this.convertFISResponse(data);
}
}