fix zoom

Author: thomasneirynck

x-pack/plugins/maps/public/layers/sources/source.d.ts

@@ -31,6 +31,8 @@ export interface ISource {
   isTimeAware(): Promise<boolean>;
   getImmutableProperties(): Promise<ImmutableSourceProperty[]>;
   getAttributions(): Promise<Attribution[]>;
+  getMinZoom(): number;
+  getMaxZoom(): number;
 }
 
 export class AbstractSource implements ISource {
@@ -49,4 +51,6 @@ export class AbstractSource implements ISource {
   isTimeAware(): Promise<boolean>;
   getImmutableProperties(): Promise<ImmutableSourceProperty[]>;
   getAttributions(): Promise<Attribution[]>;
+  getMinZoom(): number;
+  getMaxZoom(): number;
 }

x-pack/plugins/maps/public/layers/sources/source.js

@@ -6,6 +6,7 @@
 
 // eslint-disable-next-line @kbn/eslint/no-restricted-paths
 import { copyPersistentState } from '../../reducers/util';
+import { MIN_ZOOM, MAX_ZOOM } from '../../../common/constants';
 
 export class AbstractSource {
   static isIndexingSource = false;
@@ -148,4 +149,12 @@ export class AbstractSource {
   async getValueSuggestions(/* field, query */) {
     return [];
   }
+
+  getMinZoom() {
+    return MIN_ZOOM;
+  }
+
+  getMaxZoom() {
+    return MAX_ZOOM;
+  }
 }