refactoring

Logic/FeatureSource/Actors/SaveFeatureSourceToLocalStorage.ts

@@ -0,0 +1,36 @@
+import FeatureSource, { Tiled } from "../FeatureSource"
+import { Tiles } from "../../../Models/TileRange"
+import { IdbLocalStorage } from "../../Web/IdbLocalStorage"
+import { UIEventSource } from "../../UIEventSource"
+import LayerConfig from "../../../Models/ThemeConfig/LayerConfig"
+import { BBox } from "../../BBox"
+import SimpleFeatureSource from "../Sources/SimpleFeatureSource"
+import FilteredLayer from "../../../Models/FilteredLayer"
+import Loc from "../../../Models/Loc"
+import { Feature } from "geojson"
+import TileLocalStorage from "./TileLocalStorage"
+import { GeoOperations } from "../../GeoOperations"
+import { Utils } from "../../../Utils"
+
+/***
+ * Saves all the features that are passed in to localstorage, so they can be retrieved on the next run
+ *
+ * The data is saved in a tiled way on a fixed zoomlevel and is retrievable per layer.
+ *
+ * Also see the sibling class
+ */
+export default class SaveFeatureSourceToLocalStorage {
+    constructor(layername: string, zoomlevel: number, features: FeatureSource) {
+        const storage = TileLocalStorage.construct<Feature[]>(layername)
+        features.features.addCallbackAndRunD((features) => {
+            const sliced = GeoOperations.slice(zoomlevel, features)
+            sliced.forEach((features, tileIndex) => {
+                const src = storage.getTileSource(tileIndex)
+                if (Utils.sameList(src.data, features)) {
+                    return
+                }
+                src.setData(features)
+            })
+        })
+    }
+}