302 lines
10 KiB
TypeScript
302 lines
10 KiB
TypeScript
import { existsSync, readdirSync, readFileSync, unlinkSync, writeFileSync } from "fs"
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import ScriptUtils from "./ScriptUtils"
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import { Utils } from "../src/Utils"
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import Script from "./Script"
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import { GeoOperations } from "../src/Logic/GeoOperations"
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import { Feature, Polygon } from "geojson"
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import { Tiles } from "../src/Models/TileRange"
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class StatsDownloader {
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private readonly urlTemplate =
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"https://osmcha.org/api/v1/changesets/?date__gte={start_date}&date__lte={end_date}&page={page}&comment=%23mapcomplete&page_size=100"
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private readonly _targetDirectory: string
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constructor(targetDirectory = ".") {
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this._targetDirectory = targetDirectory
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}
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public async DownloadStats(startYear = 2020, startMonth = 5, startDay = 1): Promise<void> {
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const today = new Date()
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const currentYear = today.getFullYear()
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const currentMonth = today.getMonth() + 1
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for (let year = startYear; year <= currentYear; year++) {
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for (let month = 1; month <= 12; month++) {
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if (year === startYear && month < startMonth) {
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continue
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}
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if (year === currentYear && month > currentMonth) {
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break
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}
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const pathM = `${this._targetDirectory}/stats.${year}-${month}.json`
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if (existsSync(pathM)) {
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continue
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}
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const features = []
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let monthIsFinished = true
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const writtenFiles = []
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for (let day = startDay; day <= 31; day++) {
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if (year === currentYear && month === currentMonth && day === today.getDate()) {
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monthIsFinished = false
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break
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}
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{
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const date = new Date(year, month - 1, day)
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if (date.getMonth() != month - 1) {
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// We did roll over
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continue
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}
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}
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const path = `${this._targetDirectory}/stats.${year}-${month}-${
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(day < 10 ? "0" : "") + day
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}.day.json`
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writtenFiles.push(path)
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if (existsSync(path)) {
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let loadedFeatures = JSON.parse(readFileSync(path, { encoding: "utf-8" }))
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loadedFeatures = loadedFeatures?.features ?? loadedFeatures
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features.push(...loadedFeatures) // day-stats are generally a list already, but in some ad-hoc cases might be a geojson-collection too
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console.log(
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"Loaded ",
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path,
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"from disk, which has",
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features.length,
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"features now"
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)
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continue
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}
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let dayFeatures: any[] = undefined
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try {
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dayFeatures = await this.DownloadStatsForDay(year, month, day)
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} catch (e) {
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console.error(e)
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console.error(
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"Could not download " +
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year +
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"-" +
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month +
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"-" +
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day +
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"... Trying again"
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)
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dayFeatures = await this.DownloadStatsForDay(year, month, day)
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}
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writeFileSync(path, JSON.stringify(dayFeatures))
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features.push(...dayFeatures)
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}
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if (monthIsFinished) {
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writeFileSync(pathM, JSON.stringify({ features }))
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for (const writtenFile of writtenFiles) {
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unlinkSync(writtenFile)
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}
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}
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}
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startDay = 1
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}
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}
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public async DownloadStatsForDay(
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year: number,
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month: number,
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day: number
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): Promise<ChangeSetData[]> {
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let page = 1
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let allFeatures: ChangeSetData[] = []
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let endDay = new Date(year, month - 1 /* Zero-indexed: 0 = january*/, day + 1)
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let endDate = `${endDay.getFullYear()}-${Utils.TwoDigits(
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endDay.getMonth() + 1
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)}-${Utils.TwoDigits(endDay.getDate())}`
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let url = this.urlTemplate
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.replace(
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"{start_date}",
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year + "-" + Utils.TwoDigits(month) + "-" + Utils.TwoDigits(day)
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)
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.replace("{end_date}", endDate)
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.replace("{page}", "" + page)
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let headers = {
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"User-Agent":
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"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:86.0) Gecko/20100101 Firefox/86.0",
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"Accept-Language": "en-US,en;q=0.5",
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Referer:
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"https://osmcha.org/?filters=%7B%22date__gte%22%3A%5B%7B%22label%22%3A%222020-07-05%22%2C%22value%22%3A%222020-07-05%22%7D%5D%2C%22editor%22%3A%5B%7B%22label%22%3A%22mapcomplete%22%2C%22value%22%3A%22mapcomplete%22%7D%5D%7D",
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"Content-Type": "application/json",
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Authorization: "Token 6e422e2afedb79ef66573982012000281f03dc91",
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DNT: "1",
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Connection: "keep-alive",
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TE: "Trailers",
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Pragma: "no-cache",
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"Cache-Control": "no-cache",
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}
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while (url) {
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ScriptUtils.erasableLog(
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`Downloading stats for ${year}-${month}-${day}, page ${page} ${url}`
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)
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const result = await Utils.downloadJson(url, headers)
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page++
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allFeatures.push(...result.features)
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if (result.features === undefined) {
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console.log("ERROR", result)
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return
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}
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url = result.next
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}
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allFeatures = Utils.NoNull(allFeatures)
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allFeatures.forEach((f) => {
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f.properties = { ...f.properties, ...f.properties.metadata }
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delete f.properties.metadata
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f.properties["id"] = f.id
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})
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return allFeatures
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}
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}
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interface ChangeSetData extends Feature<Polygon> {
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id: number
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type: "Feature"
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geometry: {
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type: "Polygon"
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coordinates: [number, number][][]
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}
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properties: {
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check_user: null
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reasons: []
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tags: []
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features: []
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user: string
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uid: string
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editor: string
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comment: string
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comments_count: number
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source: string
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imagery_used: string
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date: string
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reviewed_features: []
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create: number
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modify: number
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delete: number
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area: number
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is_suspect: boolean
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harmful: any
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checked: boolean
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check_date: any
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metadata: {
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host: string
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theme: string
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imagery: string
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language: string
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}
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}
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}
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class GenerateSeries extends Script {
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constructor() {
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super("Downloads metadata about changesets made by MapComplete from OsmCha")
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}
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async main(args: string[]): Promise<void> {
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const targetDir = args[0] ?? "../../git/MapComplete-data"
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await this.downloadStatistics(targetDir + "/changeset-metadata")
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await this.generateCenterPoints(
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targetDir + "/changeset-metadata",
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targetDir + "/mapcomplete-changes/",
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{
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zoomlevel: 8,
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}
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)
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}
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private async downloadStatistics(targetDir: string) {
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let year = 2020
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let month = 5
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let day = 1
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if (!isNaN(Number(process.argv[2]))) {
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year = Number(process.argv[2])
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}
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if (!isNaN(Number(process.argv[3]))) {
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month = Number(process.argv[3])
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}
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if (!isNaN(Number(process.argv[4]))) {
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day = Number(process.argv[4])
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}
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do {
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try {
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await new StatsDownloader(targetDir).DownloadStats(year, month, day)
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break
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} catch (e) {
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console.log(e)
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}
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} while (true)
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const allFiles = readdirSync(targetDir).filter((p) => p.endsWith(".json"))
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writeFileSync(targetDir + "/file-overview.json", JSON.stringify(allFiles))
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}
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private generateCenterPoints(
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sourceDir: string,
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targetDir: string,
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options: {
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zoomlevel: number
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}
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) {
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const allPaths = readdirSync(sourceDir).filter(
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(p) => p.startsWith("stats.") && p.endsWith(".json")
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)
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let allFeatures: ChangeSetData[] = [].concat(
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...allPaths.map(
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(path) => JSON.parse(readFileSync(sourceDir + "/" + path, "utf-8")).features
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)
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)
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allFeatures = allFeatures.filter(
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(f) =>
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f?.properties !== undefined &&
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(f.properties.editor === null ||
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f.properties.editor.toLowerCase().startsWith("mapcomplete"))
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)
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allFeatures = allFeatures.filter(
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(f) => f.geometry !== null && f.properties.metadata?.theme !== "EMPTY CS"
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)
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allFeatures = allFeatures.filter(
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(f) =>
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f?.properties !== undefined &&
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(f.properties.editor === null ||
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f.properties.editor.toLowerCase().startsWith("mapcomplete"))
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)
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allFeatures = allFeatures.filter((f) => f.properties.metadata?.theme !== "EMPTY CS")
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const centerpoints = allFeatures.map((f) => GeoOperations.centerpoint(f))
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console.log("Found", centerpoints.length, " changesets in total")
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const perBbox = GeoOperations.spreadIntoBboxes(centerpoints, options.zoomlevel)
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for (const [tileNumber, features] of perBbox) {
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const [z, x, y] = Tiles.tile_from_index(tileNumber)
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const path = `${targetDir}/tile_${z}_${x}_${y}.geojson`
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features.forEach((f) => {
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delete f.bbox
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})
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writeFileSync(
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path,
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JSON.stringify(
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{
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type: "FeatureCollection",
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features: features,
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},
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null,
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" "
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)
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)
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ScriptUtils.erasableLog("Written ", path, "which has ", features.length, "features")
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}
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}
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}
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new GenerateSeries().run()
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