First steps at supporting other map tile servers (#7)

src/components/map/TileServerChooserButton.tsx

@@ -0,0 +1,13 @@
+import React from 'react';
+
+import { IonButton, IonIcon } from '@ionic/react';
+import { layersOutline } from 'ionicons/icons';
+const TileServerChooserButton: React.FC<{}> = () => {
+  return (
+    <IonButton id='open-TileServerChooser'>
+      <IonIcon slot='icon-only' icon={layersOutline} />
+    </IonButton>
+  );
+};
+
+export default TileServerChooserButton;

src/components/map/TileServerChooserDialog.tsx

@@ -0,0 +1,52 @@
+import {
+  IonContent,
+  IonHeader,
+  IonItem,
+  IonLabel,
+  IonList,
+  IonModal,
+  IonRadio,
+  IonRadioGroup,
+  IonTitle,
+} from '@ionic/react';
+import React from 'react';
+import { useDispatch, useSelector } from 'react-redux';
+import { mapActions, MapState } from '../../store/map';
+import { tileProviders } from './tile';
+
+const TileServerChooserDialog: React.FC<{}> = () => {
+  
+  const tileProvider = useSelector(
+    (state: { map: MapState }) => state.map.scope.tileProvider
+  ) as keyof typeof tileProviders;
+
+  const dispatch = useDispatch();
+
+  const changeHandler = (event: any) => {
+    dispatch(mapActions.setTileProvider(event.detail.value));
+  };
+
+  return (
+    <IonModal trigger='open-TileServerChooser'>
+      <IonHeader>
+        <IonTitle>Select your map</IonTitle>
+      </IonHeader>
+      <IonContent>
+        <IonList>
+          <IonRadioGroup value={tileProvider} onIonChange={changeHandler}>
+            {Object.keys(tileProviders).map((provider) => {
+              return (
+                <IonItem key={provider}>
+                  <IonLabel> {tileProviders[provider].name}</IonLabel>
+                  <IonRadio slot='start' value={provider} />
+                </IonItem>
+              );
+            })}
+          </IonRadioGroup>
+        </IonList>
+      </IonContent>
+    </IonModal>
+  );
+};
+
+export default TileServerChooserDialog;

src/components/map/map.tsx

@@ -23,6 +23,8 @@ import GpxImport from './gpx-import';
 import Gpxes from './gpxes';
 import GpxRecord from './gpx-record';
 import { initDb } from '../../db';
+import TileServerChooserButton from './TileServerChooserButton';
+import TileServerChooserDialog from './TileServerChooserDialog';
 
 const Map: react.FC<{}> = (props: {}) => {
   const dispatch = useDispatch();
@@ -48,6 +50,7 @@ const Map: react.FC<{}> = (props: {}) => {
     <>
       <IonContent fullscreen={true}>
         <IonApp>
+          <TileServerChooserDialog />
           <Slippy>
             <Whiteboard>
               <CurrentLocation />
@@ -62,6 +65,7 @@ const Map: react.FC<{}> = (props: {}) => {
       <IonHeader className='ion-no-border' translucent={true}>
         <IonToolbar>
           <IonButtons slot='end'>
+            <TileServerChooserButton />
             <GpxRecord />
             <GpxImport />
           </IonButtons>

src/components/map/tile.tsx

@@ -1,7 +1,103 @@
 import React from 'react';
+import { useSelector } from 'react-redux';
+import { MapState } from '../../store/map';
 
-const tileProvider = (zoom: number, x: number, y: number) =>
-  'https://tile.openstreetmap.org/' + zoom + '/' + x + '/' + y + '.png';
+export interface TileProvider {
+  name: string;
+  minZoom: number;
+  maxZoom: number;
+  getTileUrl: { (zoom: number, x: number, y: number): string };
+}
+
+const getRandomItem = (items: any[]) => {
+  const idx = Math.floor(Math.random() * items.length);
+  return items[idx];
+};
+
+const abc = ['a', 'b', 'c'];
+
+export const tileProviders: any = {
+  osm: {
+    name: 'Open Street Map',
+    minZoom: 0,
+    maxZoom: 19,
+    getTileUrl: (zoom: number, x: number, y: number) =>
+      'https://tile.openstreetmap.org/' + zoom + '/' + x + '/' + y + '.png',
+  },
+  osmfr: {
+    name: 'Open Street Map France',
+    minZoom: 0,
+    maxZoom: 19,
+    getTileUrl: (zoom: number, x: number, y: number) =>
+      'https://' +
+      getRandomItem(abc) +
+      '.tile.openstreetmap.fr/osmfr/' +
+      zoom +
+      '/' +
+      x +
+      '/' +
+      y +
+      '.png',
+  },
+  otm: {
+    name: 'Open Topo Map',
+    minZoom: 0,
+    maxZoom: 19,
+    getTileUrl: (zoom: number, x: number, y: number) =>
+      'https://' +
+      getRandomItem(abc) +
+      '.tile.opentopomap.org/' +
+      zoom +
+      '/' +
+      x +
+      '/' +
+      y +
+      '.png',
+  },
+  cyclosm: {
+    name: 'CyclOSM',
+    minZoom: 0,
+    maxZoom: 19,
+    getTileUrl: (zoom: number, x: number, y: number) =>
+      'https://' +
+      getRandomItem(abc) +
+      '.tile-cyclosm.openstreetmap.fr/cyclosm/' +
+      zoom +
+      '/' +
+      x +
+      '/' +
+      y +
+      '.png',
+  },
+  // cyclosmlite: {
+  //   name: 'CyclOSM lite',
+  //   minZoom: 0,
+  //   maxZoom: 19,
+  //   getTileUrl: (zoom: number, x: number, y: number) =>
+  //     'https://' +
+  //     getRandomItem(abc) +
+  //     '.tile-cyclosm.openstreetmap.fr/cyclosm-lite/' +
+  //     zoom +
+  //     '/' +
+  //     x +
+  //     '/' +
+  //     y +
+  //     '.png',
+  // },
+  // esrisat: {
+  //   name: 'ESRI Satellite',
+  //   minZoom: 0,
+  //   maxZoom: 19,
+  //   getTileUrl: (zoom: number, x: number, y: number) =>
+  //     'https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/' +
+  //     zoom +
+  //     '/' +
+  //     x +
+  //     '/' +
+  //     y +
+  //     '.jpg',
+  // },
+};
 
 const Tile: React.FC<{
   ix: number;
@@ -16,9 +112,13 @@ const Tile: React.FC<{
   y: number;
   zoom: number;
 }) => {
+  const tileProvider = useSelector(
+    (state: { map: MapState }) => state.map.scope.tileProvider
+  ) as keyof typeof tileProviders;
+
   return (
     <img
-      src={tileProvider(props.zoom, props.x, props.y)}
+      src={tileProviders[tileProvider].getTileUrl(props.zoom, props.x, props.y)}
       className='tile'
       alt=''
     />

src/store/map.ts

@@ -18,10 +18,12 @@ export const zoom0 = 18;
 export interface MapScope {
   center: geoPoint;
   zoom: number;
+  tileProvider: string;
 }
 var initialMapScope: MapScope = {
   center: { lat: -37.8403508, lon: 77.5539501 },
   zoom: 15,
+  tileProvider: 'osm',
 };
 
 // Derived properties
@@ -197,6 +199,9 @@ const mapSlice = createSlice({
   name: 'map',
   initialState: initialMapState,
   reducers: {
+    setTileProvider: (state, action) => {
+      state.scope.tileProvider = action.payload;
+    },
     resize: (state) => {
       evaluateStateFromScope(state);
     },