Add generateTileOverview-script

scripts/generateTileOverview.ts

@@ -0,0 +1,51 @@
+/**
+ * Generates an overview for which tiles exist and which don't
+ */
+import ScriptUtils from "./ScriptUtils";
+import {Tiles} from "../Models/TileRange";
+import {writeFileSync} from "fs";
+
+function main(args: string[]) {
+
+    const directory = args[0]
+    let zoomLevel = args[1]
+    const files = ScriptUtils.readDirRecSync(directory, 1)
+        .filter(f => f.endsWith(".geojson"))
+
+    const indices /* Map<string, number[]>*/ = {}
+    for (const path of files) {
+
+        const match = path.match(".*_\([0-9]*\)_\([0-9]*\)_\([0-9]*\).geojson")
+        if (match === null) {
+            continue
+        }
+        const z = match[1]
+        if(zoomLevel === undefined){
+            zoomLevel = z
+        }else if(zoomLevel !== z){
+            throw "Mixed zoomlevels detected"
+        }
+        
+        const x = match[2]
+        const y = match[3]
+        if(!indices[x] !== undefined){
+            indices[x] = []
+        }
+        indices[x] .push(Number(y))
+    }
+    indices["zoom"] = zoomLevel;
+    const match = files[0].match("\(.*\)_\([0-9]*\)_\([0-9]*\)_\([0-9]*\).geojson")
+    const path = match[1]+"_"+zoomLevel+"_overview.json"
+    writeFileSync( path, JSON.stringify(indices))
+    console.log("Written overview for", files.length, " tiles at", path)
+}
+
+let args = [...process.argv]
+args.splice(0, 2)
+args.forEach(file => {
+    try {
+        main(args)
+    } catch (e) {
+        console.error("Could not handle file ", file, " due to ", e)
+    }
+})