add eslint and prettier

src/module/actor/actor-data.ts

@@ -0,0 +1,2 @@
+// TODO: Actually add a type for data
+export type DS4ActorDataType = unknown;

src/module/actor/actor-sheet.ts

@@ -1,12 +1,13 @@
+import { DS4Actor } from "./actor";
+import { DS4ActorDataType } from "./actor-data";
+
 /**
  * Extend the basic ActorSheet with some very simple modifications
  * @extends {ActorSheet}
  */
-export class DS4ActorSheet extends ActorSheet<{
-    /* TODO: add actual type for data */
-}> {
+export class DS4ActorSheet extends ActorSheet<DS4ActorDataType, DS4Actor> {
     /** @override */
-    static get defaultOptions() {
+    static get defaultOptions(): FormApplicationOptions {
         return mergeObject(super.defaultOptions, {
             classes: ["ds4", "sheet", "actor"],
             template: "systems/ds4/templates/actor/actor-sheet.html",
@@ -19,11 +20,11 @@ export class DS4ActorSheet extends ActorSheet<{
     /* -------------------------------------------- */
 
     /** @override */
-    getData() {
+    getData(): ActorSheetData<DS4ActorDataType> {
         // TODO: replace ["..."] access with .
         const data = super.getData();
         data["dtypes"] = ["String", "Number", "Boolean"];
-        for (let attr of Object.values(data.data["attributes"])) {
+        for (const attr of Object.values(data.data["attributes"])) {
             attr["isCheckbox"] = attr["dtype"] === "Boolean";
         }
         console.log(data);
@@ -31,7 +32,7 @@ export class DS4ActorSheet extends ActorSheet<{
     }
 
     /** @override */
-    activateListeners(html) {
+    activateListeners(html: JQuery): void {
         super.activateListeners(html);
 
         // Everything below here is only needed if the sheet is editable
@@ -65,7 +66,7 @@ export class DS4ActorSheet extends ActorSheet<{
      * @param {Event} event   The originating click event
      * @private
      */
-    _onItemCreate(event) {
+    _onItemCreate(event: JQuery.ClickEvent): Promise<Item> {
         event.preventDefault();
         const header = event.currentTarget;
         // Get the type of item to create.
@@ -92,14 +93,14 @@ export class DS4ActorSheet extends ActorSheet<{
      * @param {Event} event   The originating click event
      * @private
      */
-    _onRoll(event) {
+    _onRoll(event: JQuery.ClickEvent): void {
         event.preventDefault();
         const element = event.currentTarget;
         const dataset = element.dataset;
 
         if (dataset.roll) {
-            let roll = new Roll(dataset.roll, this.actor.data.data);
-            let label = dataset.label ? `Rolling ${dataset.label}` : "";
+            const roll = new Roll(dataset.roll, this.actor.data.data as Record<string, unknown>);
+            const label = dataset.label ? `Rolling ${dataset.label}` : "";
             roll.roll().toMessage({
                 speaker: ChatMessage.getSpeaker({ actor: this.actor }),
                 flavor: label,

src/module/actor/actor.ts

@@ -1,34 +1,39 @@
+import { DS4ActorDataType } from "./actor-data";
+
 /**
  * Extend the base Actor entity by defining a custom roll data structure which is ideal for the Simple system.
  * @extends {Actor}
  */
-export class DS4Actor extends Actor {
+export class DS4Actor extends Actor<DS4ActorDataType> {
     /** @override */
-    prepareDerivedData() {
+    prepareDerivedData(): void {
         const data = this.data;
         this._prepareCombatValues(data);
     }
 
-    _prepareCombatValues(data) {
+    _prepareCombatValues(data: ActorData<DS4ActorDataType>): void {
         const hitPointsModifier = getProperty(data, "data.combatValues.hitPoints.modifier") || 0;
         setProperty(
             data,
             "data.combatValues.hitPoints.max",
-            data.data.attributes.body.initial + data.data.traits.constitution.initial + 10 + hitPointsModifier
+            data.data["attributes"]["body"].initial + // TODO: replace ["..."]
+                data.data["traits"]["constitution"].initial + // TODO: replace ["..."]
+                10 +
+                hitPointsModifier,
         );
 
         const defenseModifier = getProperty(data, "data.combatValues.defense.modifier") || 0;
         setProperty(
             data,
             "data.combatValues.defense.value",
-            data.data.attributes.body.initial +
-                data.data.traits.constitution.initial +
+            data.data["attributes"]["body"].initial + // TODO: replace ["..."]
+                data.data["traits"]["constitution"].initial + // TODO: replace ["..."]
                 this._getArmorValue() +
-                defenseModifier
+                defenseModifier,
         );
     }
 
-    _getArmorValue() {
+    _getArmorValue(): number {
         return this.data["items"]
             .filter((item) => ["armor", "shield"].includes(item.type))
             .filter((item) => item.data.equipped)