Add setting migration

src/main.js

@@ -3,6 +3,7 @@
 import {getRangesFromSpeedProvider, getUnreachableColorFromSpeedProvider, initApi, registerModule, registerSystem} from "./api.js"
 import {getHexSizeSupportTokenGridCenter} from "./compatibility.js"
 import {measure, moveTokens, onMouseMove} from "./foundry_imports.js"
+import {performMigrations} from "./migration.js"
 import {registerSettings, settingsKey} from "./settings.js"
 import {SpeedProvider} from "./speed_provider.js"
 
@@ -22,6 +23,7 @@ Hooks.once("init", () => {
 })
 
 Hooks.once("ready", () => {
+	performMigrations()
 	Hooks.callAll("dragRuler.ready", SpeedProvider)
 })
 

src/migration.js

@@ -0,0 +1,27 @@
+import {settingsKey} from "./settings.js"
+
+const currentDataVersion = "1.3.0"
+
+export function performMigrations() {
+	if (!game.user.isGM)
+		return
+
+	let dataVersion = game.settings.get(settingsKey, "dataVersion")
+	if (dataVersion === "fresh install") {
+		// Migration from unnamed version. TODO Remove this in a future version
+		let speedAttribute = game.settings.storage.get("world").get(`${settingsKey}.speedAttribute`)
+		if (speedAttribute)
+			speedAttribute = speedAttribute.slice(1, speedAttribute.length - 1)
+		const speedAttributeDefault = game.settings.get(settingsKey, "speedProviders.native.setting.speedAttribute")
+		if (speedAttribute !== speedAttributeDefault)
+			game.settings.set(settingsKey, "speedProviders.native.setting.speedAttribute", speedAttribute)
+
+		let dashMultiplier = game.settings.storage.get("world").get(`${settingsKey}.dashMultiplier`)
+		const dashMultiplierDefault = game.settings.get(settingsKey, "speedProviders.native.setting.dashMultiplier")
+		if (dashMultiplier !== dashMultiplierDefault)
+			game.settings.set(settingsKey, "speedProviders.native.setting.dashMultiplier", dashMultiplier)
+		// End of unnamed version migration code
+		game.settings.set(settingsKey, "dataVersion", currentDataVersion)
+		return
+	}
+}

src/settings.js

@@ -4,6 +4,13 @@ import {SpeedProvider} from "./speed_provider.js"
 export const settingsKey = "drag-ruler";
 
 export function registerSettings() {
+	game.settings.register(settingsKey, "dataVersion", {
+		scope: "world",
+		config: false,
+		type: String,
+		default: "fresh install"
+	})
+
 	game.settings.register(settingsKey, "swapSpacebarRightClick", {
 		name: "drag-ruler.settings.swapSpacebarRightClick.name",
 		hint: "drag-ruler.settings.swapSpacebarRightClick.hint",