Further development of split-road feature; refactoring of change-handling

Logic/Actors/ChangeToElementsActor.ts

@@ -0,0 +1,36 @@
+import {ElementStorage} from "../ElementStorage";
+import {Changes} from "../Osm/Changes";
+
+export default class ChangeToElementsActor {
+    constructor(changes: Changes, allElements: ElementStorage) {
+        changes.pendingChanges.addCallbackAndRun(changes => {
+            for (const change of changes) {
+                const id = change.type + "/" + change.id;
+                if (!allElements.has(id)) {
+continue; // Will be picked up later on
+                }
+                const src = allElements.getEventSourceById(id)
+
+                let changed = false;
+                for (const kv of change.tags ?? []) {
+                    // Apply tag changes and ping the consumers
+                    const k = kv.k
+                    let v = kv.v
+                    if (v === "") {
+                        v = undefined;
+                    }
+                    if (src.data[k] === v) {
+                        continue
+                    }
+                    changed = true;
+                    src.data[k] = v;
+                }
+                if (changed) {
+                    src.ping()
+                }
+
+
+            }
+        })
+    }
+}