MapComplete/scripts/postal_code_tools/createRoutablePoint.ts

import { appendFileSync, existsSync, readFileSync, writeFileSync } from "fs"
import { GeoOperations } from "../../Logic/GeoOperations"
import ScriptUtils from "../ScriptUtils"
import { Utils } from "../../Utils"

async function main(args: string[]) {
    ScriptUtils.fixUtils()
    const pointCandidates = JSON.parse(readFileSync(args[0], "utf8"))
    const postcodes = JSON.parse(readFileSync(args[1], "utf8"))
    const output = args[2] ?? "centralCoordinates.csv"

    const perPostCode = new Map<string, any[]>()

    const alreadyLoaded = new Set<number>()
    if (existsSync(output)) {
        const lines = readFileSync(output, { encoding: "utf8" }).split("\n")
        lines.shift()
        lines.forEach((line) => {
            const postalCode = Number(line.split(",")[0])
            alreadyLoaded.add(postalCode)
        })
    } else {
        writeFileSync(output, "postal_code,lon,lat\n", { encoding: "utf8" })
    }

    for (const boundary of postcodes.features) {
        const postcode = boundary.properties.nouveau_PO
        if (alreadyLoaded.has(Number(postcode))) {
            console.log("Skipping ", postcode, "as already loaded")
            continue
        }
        if (perPostCode.has(postcode)) {
            perPostCode.get(postcode).push(boundary)
        } else {
            perPostCode.set(postcode, [boundary])
        }
    }

    for (const postcode of Array.from(perPostCode.keys())) {
        const boundaries = perPostCode.get(postcode)
        const candidates = []
        for (const boundary of boundaries) {
            for (const candidate of pointCandidates.features) {
                if (!GeoOperations.inside(candidate, boundary)) {
                    // console.log(JSON.stringify(candidate))
                    continue
                }
                candidates.push(candidate.geometry.coordinates)
            }
        }
        if (candidates.length === 0) {
            console.log(
                "Postcode ",
                postcode,
                "has",
                candidates.length,
                "candidates, using centerpoint instead"
            )
            candidates.push(
                ...boundaries.map((boundary) => GeoOperations.centerpointCoordinates(boundary))
            )
        }

        const url =
            "https://staging.anyways.eu/routing-api/v1/routes?access_token=postal_code_script&turn_by_turn=false&format=geojson&language=en"
        const depPoints: [number, number][] = Utils.NoNull(
            await Promise.all(
                candidates.map(async (candidate) => {
                    try {
                        const result = await Utils.downloadJson(
                            url +
                                "&loc=" +
                                candidate.join("%2C") +
                                "&loc=3.22000%2C51.21577&profile=car.short"
                        )
                        const depPoint = result.features.filter(
                            (f) => f.geometry.type === "LineString"
                        )[0].geometry.coordinates[0]
                        return <[number, number]>[depPoint[0], depPoint[1]] // Drop elevation
                    } catch (e) {
                        console.error("No result or could not calculate a route")
                    }
                })
            )
        )

        const centers = boundaries.map((b) => GeoOperations.centerpointCoordinates(b))
        const center = GeoOperations.centerpointCoordinates({
            type: "Feature",
            geometry: {
                type: "LineString",
                coordinates: centers,
            },
        })

        depPoints.sort(
            (c0, c1) =>
                GeoOperations.distanceBetween(c0, center) -
                GeoOperations.distanceBetween(c1, center)
        )
        console.log(
            "Sorted departure point candidates for ",
            postcode,
            " are ",
            JSON.stringify(depPoints)
        )
        appendFileSync(output, [postcode, ...depPoints[0]].join(", ") + "\n", { encoding: "utf8" })
    }
}

let args = [...process.argv]
args.splice(0, 2)
main(args).then((_) => console.log("Done!"))