LoRaWAN-Signal-Mapping/server/train-ai/DatasetFetcher.mjs

"use strict";

import { normalise, clamp } from '../Helpers/Math.mjs';

class DatasetFetcher {
	constructor({ settings, RSSIRepo }) {
		this.settings = settings;
		this.repo_rssi = RSSIRepo;
	}
	
	*fetch_input(gateway_id) {
		for(let rssi of this.repo_rssi.iterate_gateway(gateway_id)) {
			yield [
				normalise(rssi.latitude,
					{ min: -90, max: +90 },
					{ min: 0, max: 1 }
				),
				normalise(rssi.longitude,
					{ min: -180, max: +180 },
					{ min: 0, max: 1 }
				)
			];
		}
	}
	
	*fetch_output(gateway_id) {
		for(let rssi of this.repo_rssi.iterate_gateway(gateway_id)) {
			yield [
				clamp(normalise(rssi.rssi,
					{ min: this.settings.ai.rssi_min, max: this.settings.ai.rssi_max },
					{ min: 0, max: 1 }
				), 0, 1)
			];
		}
	}
}

export default DatasetFetcher;