Rename js/ to src/ since the rust component is now gone

src/socket.js

@@ -0,0 +1,52 @@
+import {currentSpeedProvider} from "./api.js";
+
+let socket;
+
+Hooks.once("socketlib.ready", () => {
+	socket = socketlib.registerModule("drag-ruler");
+	socket.register("updateCombatantDragRulerFlags", _socketUpdateCombatantDragRulerFlags);
+	socket.register("recalculate", _socketRecalculate);
+});
+
+export function updateCombatantDragRulerFlags(combat, updates) {
+	const combatId = combat.id;
+	// TODO Check if canvas.tokens.get is still neccessary in future foundry versions
+	return socket
+		.executeAsGM(_socketUpdateCombatantDragRulerFlags, combatId, updates)
+		.then(() =>
+			currentSpeedProvider.onMovementHistoryUpdate(
+				updates.map(update => canvas.tokens.get(combat.combatants.get(update._id).token.id)),
+			),
+		);
+}
+
+async function _socketUpdateCombatantDragRulerFlags(combatId, updates) {
+	const user = game.users.get(this.socketdata.userId);
+	const combat = game.combats.get(combatId);
+	const requestedUpdates = updates.length;
+	updates = updates.filter(update => {
+		const actor = combat.combatants.get(update._id).actor;
+		if (!actor) return false;
+		return actor.testUserPermission(user, "OWNER");
+	});
+	if (updates.length !== requestedUpdates) {
+		console.warn(
+			`Some of the movement history updates requested by user '${
+				game.users.get(this.socketdata.userId).name
+			}' were not performed because the user lacks owner permissions for those tokens`,
+		);
+	}
+	updates = updates.map(update => {
+		return {_id: update._id, flags: {dragRuler: update.dragRulerFlags}};
+	});
+	await combat.updateEmbeddedDocuments("Combatant", updates, {diff: false});
+}
+
+export function recalculate(tokens) {
+	socket.executeForEveryone(_socketRecalculate, tokens ? tokens.map(token => token.id) : undefined);
+}
+
+function _socketRecalculate(tokenIds) {
+	const ruler = canvas.controls.ruler;
+	if (ruler.isDragRuler) ruler.dragRulerRecalculate(tokenIds);
+}