Feature: add bing maps (test), see #648

scripts/downloadEli.ts

@@ -2,11 +2,13 @@ import Script from "./Script"
 import { Utils } from "../src/Utils"
 import { Eli, EliEntry } from "./@types/eli"
 import fs from "fs"
+import { BingRasterLayer } from "../src/UI/Map/BingRasterLayer"
 
 class DownloadEli extends Script {
     constructor() {
         super("Downloads a fresh copy of the editor layer index, removes all unnecessary data.")
     }
+
     async main(args: string[]): Promise<void> {
         const url = "https://osmlab.github.io/editor-layer-index/imagery.geojson"
         // Target should use '.json' instead of '.geojson', as the latter cannot be imported by the build systems
@@ -20,7 +22,18 @@ class DownloadEli extends Script {
 
             if (props.type === "bing") {
                 // A lot of work to implement - see https://github.com/pietervdvn/MapComplete/issues/648
-                continue
+                try {
+                    const bing = await BingRasterLayer.get()
+                    if (bing === "error") {
+                        continue
+                    }
+                    delete props.default
+                    props.category = "photo"
+                    props.url = bing.properties.url.replace("%7Bquadkey%7D", "{quadkey}")
+                } catch (e) {
+                    console.error("Could not fetch URL for bing", e)
+                    continue
+                }
             }
 
             if (props.id === "MAPNIK") {

src/Logic/Actors/BackgroundLayerResetter.ts

@@ -8,7 +8,7 @@ import { RasterLayerPolygon, RasterLayerUtils } from "../../Models/RasterLayers"
  */
 export default class BackgroundLayerResetter {
     constructor(
-        currentBackgroundLayer: UIEventSource<RasterLayerPolygon>,
+        currentBackgroundLayer: UIEventSource<RasterLayerPolygon | undefined>,
         availableLayers: Store<RasterLayerPolygon[]>
     ) {
         if (Utils.runningFromConsole) {

src/Models/RasterLayers.ts

@@ -8,9 +8,14 @@ import { RasterLayerProperties } from "./RasterLayerProperties"
 
 export class AvailableRasterLayers {
     public static EditorLayerIndex: (Feature<Polygon, EditorLayerIndexProperties> &
-        RasterLayerPolygon)[] = <any>editorlayerindex.features
+        RasterLayerPolygon)[] = (<any>editorlayerindex.features).filter(
+        (l) => l.properties.id !== "Bing"
+    )
     public static globalLayers: RasterLayerPolygon[] = globallayers.layers
-        .filter((properties) => properties.id !== "osm.carto" /*Added separately*/)
+        .filter(
+            (properties) =>
+                properties.id !== "osm.carto" && properties.id !== "Bing" /*Added separately*/
+        )
         .map(
             (properties) =>
                 <RasterLayerPolygon>{
@@ -19,6 +24,9 @@ export class AvailableRasterLayers {
                     geometry: BBox.global.asGeometry(),
                 }
         )
+    public static bing: RasterLayerPolygon = (<any>editorlayerindex.features).find(
+        (l) => l.properties.id === "Bing"
+    )
     public static readonly osmCartoProperties: RasterLayerProperties = {
         id: "osm",
         name: "OpenStreetMap",
@@ -56,7 +64,8 @@ export class AvailableRasterLayers {
     }
 
     public static layersAvailableAt(
-        location: Store<{ lon: number; lat: number }>
+        location: Store<{ lon: number; lat: number }>,
+        enableBing?: Store<boolean>
     ): Store<RasterLayerPolygon[]> {
         const availableLayersBboxes = Stores.ListStabilized(
             location.mapD((loc) => {
@@ -67,20 +76,26 @@ export class AvailableRasterLayers {
             })
         )
         return Stores.ListStabilized(
-            availableLayersBboxes.map((eliPolygons) => {
-                const loc = location.data
-                const lonlat: [number, number] = [loc.lon, loc.lat]
-                const matching: RasterLayerPolygon[] = eliPolygons.filter((eliPolygon) => {
-                    if (eliPolygon.geometry === null) {
-                        return true // global ELI-layer
+            availableLayersBboxes.map(
+                (eliPolygons) => {
+                    const loc = location.data
+                    const lonlat: [number, number] = [loc.lon, loc.lat]
+                    const matching: RasterLayerPolygon[] = eliPolygons.filter((eliPolygon) => {
+                        if (eliPolygon.geometry === null) {
+                            return true // global ELI-layer
+                        }
+                        return GeoOperations.inside(lonlat, eliPolygon)
+                    })
+                    matching.unshift(AvailableRasterLayers.osmCarto)
+                    matching.push(AvailableRasterLayers.maptilerDefaultLayer)
+                    if (enableBing?.data) {
+                        matching.push(AvailableRasterLayers.bing)
                     }
-                    return GeoOperations.inside(lonlat, eliPolygon)
-                })
-                matching.unshift(AvailableRasterLayers.osmCarto)
-                matching.push(AvailableRasterLayers.maptilerDefaultLayer)
-                matching.push(...AvailableRasterLayers.globalLayers)
-                return matching
-            })
+                    matching.push(...AvailableRasterLayers.globalLayers)
+                    return matching
+                },
+                [enableBing]
+            )
         )
     }
 

src/Models/ThemeViewState.ts

@@ -201,7 +201,10 @@ export default class ThemeViewState implements SpecialVisualizationState {
         )
         this.geolocationControl = new GeolocationControlState(this.geolocation, this.mapProperties)
 
-        this.availableLayers = AvailableRasterLayers.layersAvailableAt(this.mapProperties.location)
+        this.availableLayers = AvailableRasterLayers.layersAvailableAt(
+            this.mapProperties.location,
+            this.osmConnection.isLoggedIn
+        )
 
         const self = this
         this.layerState = new LayerState(this.osmConnection, layout.layers, layout.id)

src/UI/Map/BingRasterLayer.ts

@@ -0,0 +1,89 @@
+import { RasterLayerPolygon } from "../../Models/RasterLayers"
+import { Polygon } from "geojson"
+import { RasterLayerProperties } from "../../Models/RasterLayerProperties"
+import { BBox } from "../../Logic/BBox"
+import { Utils } from "../../Utils"
+
+export class BingRasterLayerProperties implements Partial<RasterLayerProperties> {
+    private static singleton: BingRasterLayerProperties | "error"
+    name = "Bing Maps Aerial"
+    id = "Bing"
+    type = "bing"
+    category = "photo"
+    min_zoom = 1
+    max_zoom = 22
+    best = false
+    attribution = {
+        url: "https://www.bing.com/maps",
+    }
+    url: string
+
+    private constructor(url: string) {
+        this.url = url
+    }
+
+    public static async get(): Promise<BingRasterLayerProperties | "error"> {
+        if (BingRasterLayerProperties.singleton === undefined) {
+            try {
+                const url = await this.getEndpoint()
+                BingRasterLayerProperties.singleton = new BingRasterLayerProperties(url)
+            } catch (e) {
+                BingRasterLayerProperties.singleton = "error"
+                console.error(e)
+            }
+        }
+        return BingRasterLayerProperties.singleton
+    }
+
+    private static async getEndpoint() {
+        console.log("Getting bing endpoint")
+        // Key by 'pietervdvn@outlook.com' from https://www.bingmapsportal.com/Application
+        // Inspired by https://github.com/zlant/parking-lanes/pull/159
+        const key = "An0vKZ4r_PZx820sn3seuPKjd1Vyc5WE3s1b-qN4HCgI-Nr6QR83aLOQ-3fbFl08"
+        const url = `https://dev.virtualearth.net/REST/v1/Imagery/Metadata/AerialOSM?include=ImageryProviders&uriScheme=https&key=${key}`
+
+        // Get the image tiles template:
+        const metadata = await Utils.downloadJson(url)
+        // FYI:
+        // "imageHeight": 256, "imageWidth": 256,
+        // "imageUrlSubdomains": ["t0","t1","t2","t3"],
+        // "zoomMax": 21,
+        const imageryResource = metadata.resourceSets[0].resources[0]
+        const template = new URL(imageryResource.imageUrl)
+        // Add tile image strictness param (n=)
+        // • n=f -> (Fail) returns a 404
+        // • n=z -> (Empty) returns a 200 with 0 bytes (no content)
+        // • n=t -> (Transparent) returns a 200 with a transparent (png) tile
+        if (!template.searchParams.has("n")) template.searchParams.append("n", "f")
+
+        // FYI: `template` looks like this but partly encoded
+        // https://ecn.{subdomain}.tiles.virtualearth.net/tiles/a{quadkey}.jpeg?g=14107&pr=odbl&n=z
+        const subdomains = ["t0", "t1", "t2", "t3"]
+        const index = Math.floor(Math.random() * subdomains.length)
+        return template.toString().replace("{subdomain}", subdomains[index])
+    }
+}
+
+export class BingRasterLayer implements RasterLayerPolygon {
+    private static singleton: RasterLayerPolygon | "error"
+    readonly type: "Feature" = "Feature"
+    readonly geometry: Polygon = BBox.global.asGeometry()
+    readonly id = "bing"
+    readonly properties: RasterLayerProperties
+
+    constructor(properties: RasterLayerProperties) {
+        this.properties = properties
+    }
+
+    public static async get(): Promise<RasterLayerPolygon | "error"> {
+        if (BingRasterLayer.singleton === undefined) {
+            const properties = await BingRasterLayerProperties.get()
+            if (properties === "error") {
+                BingRasterLayer.singleton = "error"
+            } else {
+                BingRasterLayer.singleton = new BingRasterLayer(properties)
+            }
+        }
+        return BingRasterLayer.singleton
+    }
+}