Add a context menu entry that the gm can use to reset the movement history

src/main.js

@@ -5,7 +5,7 @@ import {checkDependencies, getHexSizeSupportTokenGridCenter} from "./compatibili
 import {moveTokens, onMouseMove} from "./foundry_imports.js"
 import {performMigrations} from "./migration.js"
 import {DragRulerRuler} from "./ruler.js";
-import {getMovementHistory} from "./movement_tracking.js";
+import {getMovementHistory, resetMovementHistory} from "./movement_tracking.js";
 import {registerSettings, settingsKey} from "./settings.js"
 import {SpeedProvider} from "./speed_provider.js"
 
@@ -42,6 +42,15 @@ Hooks.on("canvasReady", () => {
 	})
 })
 
+Hooks.on("getCombatTrackerEntryContext", function (html, menu) {
+	const entry = {
+		name: "drag-ruler.resetMovementHistory",
+		icon: '<i class="fas fa-undo-alt"></i>',
+		callback: li => resetMovementHistory(ui.combat.combat, li.data('combatant-id')),
+	};
+	menu.splice(1, 0, entry);
+});
+
 function hookTokenDragHandlers() {
 	const originalDragLeftStartHandler = Token.prototype._onDragLeftStart
 	Token.prototype._onDragLeftStart = function(event) {

src/movement_tracking.js

@@ -72,3 +72,14 @@ export function getMovementHistory(token) {
 		return [];
 	return dragRulerFlags.passedWaypoints ?? [];
 }
+
+export async function resetMovementHistory(combat, combatantId) {
+	const combatant = combat.getCombatant(combatantId);
+	const dragRulerFlags = combatant.flags.dragRuler;
+	if (!dragRulerFlags)
+		return;
+	dragRulerFlags.passedWaypoints = undefined;
+	dragRulerFlags.trackedRound = undefined;
+	dragRulerFlags.rulerState = undefined;
+	await updateCombatantDragRulerFlags(combat, combatant, dragRulerFlags);
+}

src/socket.js

@@ -5,7 +5,7 @@ Hooks.once("socketlib.ready", () => {
 	socket.register("updateCombatantDragRulerFlags", _socketUpdateCombatantDragRulerFlags);
 });
 
-export async function updateCombatantDragRulerFlags(combat, combatant, flags) {
+export function updateCombatantDragRulerFlags(combat, combatant, flags) {
 	const combatId = combat.id;
 	const combatantId = combatant._id;
 	return socket.executeAsGM(_socketUpdateCombatantDragRulerFlags, combatId, combatantId, flags);