[Fix] origin change values and prioritize item options (#1835)

* Fix origin key replacement and prioritize item options

* Rename key to value

* Some fixes

* Attempt to always retrieve the source item for same actor origin

* Fix getters in item roll data

* Performance improvement

* Allow apply to item system data

* Replace implementation with shallow proxy

* Add delete to the shallow proxy

* Add proxy trap for the in operator

---------

Co-authored-by: WBHarry <williambjrklund@gmail.com>

module/data/actor/base.mjs

@@ -1,6 +1,6 @@
 import DHBaseActorSettings from '../../applications/sheets/api/actor-setting.mjs';
 import DHItem from '../../documents/item.mjs';
-import { getScrollTextData } from '../../helpers/utils.mjs';
+import { createShallowProxy, getScrollTextData } from '../../helpers/utils.mjs';
 
 const fields = foundry.data.fields;
 
@@ -180,8 +180,7 @@ export default class BaseDataActor extends foundry.abstract.TypeDataModel {
      * @returns {object}
      */
     getRollData() {
-        const data = { ...this };
-        return data;
+        return createShallowProxy(this);
     }
 
     /**

module/data/item/base.mjs

@@ -7,7 +7,12 @@
  * @property {boolean} isInventoryItem- Indicates whether items of this type is a Inventory Item
  */
 
-import { addLinkedItemsDiff, getScrollTextData, updateLinkedItemApps } from '../../helpers/utils.mjs';
+import {
+    addLinkedItemsDiff,
+    getScrollTextData,
+    createShallowProxy,
+    updateLinkedItemApps
+} from '../../helpers/utils.mjs';
 import { ActionsField } from '../fields/actionField.mjs';
 import FormulaField from '../fields/formulaField.mjs';
 
@@ -159,8 +164,8 @@ export default class BaseDataItem extends foundry.abstract.TypeDataModel {
      * @returns {object}
      */
     getRollData(options = {}) {
-        const actorRollData = this.actor?.getRollData() ?? {};
-        const data = { ...actorRollData, item: { ...this } };
+        const data = this.actor?.getRollData() ?? {};
+        data.item = createShallowProxy(this);
         return data;
     }
 

module/documents/activeEffect.mjs

@@ -169,27 +169,36 @@ export default class DhActiveEffect extends foundry.documents.ActiveEffect {
         super._applyChangeUnguided(actor, change, changes, options);
     }
 
-    static getChangeValue(model, change, effect) {
-        let key = change.value.toString();
-        const isOriginTarget = key.toLowerCase().includes('origin.@');
-        let parseModel = model;
-        if (isOriginTarget && effect.origin) {
-            key = change.key.replaceAll(/origin\.@/gi, '@');
-            try {
-                const originEffect = foundry.utils.fromUuidSync(effect.origin);
-                const doc =
-                    originEffect.parent?.parent instanceof game.system.api.documents.DhpActor
-                        ? originEffect.parent
-                        : originEffect.parent.parent;
-                if (doc) parseModel = doc;
-            } catch (_) {}
+    /** Recursively finds the first parent document of the given object */
+    static #resolveParentDocument(model, documentClass) {
+        return model instanceof documentClass
+            ? model
+            : model.parent
+              ? this.#resolveParentDocument(model.parent, documentClass)
+              : null;
     }
 
+    static getChangeValue(model, change, effect) {
+        let value = change.value.toString();
+        const useOrigin = value.toLowerCase().includes('origin.@') && effect.origin;
+        let origin = null;
+        if (effect.origin) {
+            if (useOrigin) value = value.replaceAll(/origin\.@/gi, '@');
+            const originEffect = foundry.utils.fromUuidSync(effect.origin);
+            origin = this.#resolveParentDocument(originEffect, Item);
+        }
+
+        // Get the actor and item documents. Note that actor roll data is inclusive of system roll data
+        const actor = this.#resolveParentDocument(model, Actor);
+        const item =
+            (useOrigin ? origin : null) ??
+            this.#resolveParentDocument(effect.parent, Item) ??
+            (origin?.actor === actor ? origin : null);
         const stackingParsedValue = effect.system.stacking
-            ? Roll.replaceFormulaData(key, { stacks: effect.system.stacking.value })
-            : key;
-        const evalValue = itemAbleRollParse(stackingParsedValue, parseModel, effect.parent);
-        return evalValue ?? key;
+            ? Roll.replaceFormulaData(value, { stacks: effect.system.stacking.value })
+            : value;
+        const evalValue = this.effectSafeEval(itemAbleRollParse(stackingParsedValue, actor, item));
+        return evalValue ?? value;
     }
 
     /**

module/documents/actor.mjs

@@ -1,7 +1,7 @@
 import { emitAsGM, GMUpdateEvent } from '../systemRegistration/socket.mjs';
 import { LevelOptionType } from '../data/levelTier.mjs';
 import DHFeature from '../data/item/feature.mjs';
-import { createScrollText, damageKeyToNumber, getDamageKey } from '../helpers/utils.mjs';
+import { createScrollText, damageKeyToNumber, getDamageKey, createShallowProxy } from '../helpers/utils.mjs';
 import DhCompanionLevelUp from '../applications/levelup/companionLevelup.mjs';
 import { ResourceUpdateMap } from '../data/action/baseAction.mjs';
 import { abilities } from '../config/actorConfig.mjs';
@@ -595,10 +595,7 @@ export default class DhpActor extends Actor {
 
     /**@inheritdoc */
     getRollData() {
-        const rollData = foundry.utils.deepClone(super.getRollData());
-        /* system gets repeated infinately which causes issues when trying to use the data for document creation */
-        delete rollData.system;
-
+        const rollData = createShallowProxy(super.getRollData());
         rollData.id = this.id;
         rollData.name = this.name;
         rollData.system = this.system.getRollData();

module/documents/item.mjs

@@ -54,13 +54,7 @@ export default class DHItem extends foundry.documents.Item {
      * @returns
      */
     getRollData(options = {}) {
-        let data;
-        if (this.system.getRollData) data = this.system.getRollData(options);
-        else {
-            const actorRollData = this.actor?.getRollData(options) ?? {};
-            data = { ...actorRollData, item: { ...this.system } };
-        }
-
+        let data = this.system.getRollData(options);
         if (data?.item) {
             data.item.flags = { ...this.flags };
             data.item.name = this.name;

module/helpers/utils.mjs

@@ -372,10 +372,11 @@ export const itemAbleRollParse = (value, actor, item) => {
 
     const isItemTarget = value.toLowerCase().includes('item.@');
     const slicedValue = isItemTarget ? value.replaceAll(/item\.@/gi, '@') : value;
-    const model = isItemTarget ? item : actor;
+    const model = isItemTarget || item instanceof Item ? item : actor;
+    const rollData = isItemTarget || !model?.getRollData ? model : model.getRollData();
 
     try {
-        return Roll.replaceFormulaData(slicedValue, isItemTarget || !model?.getRollData ? model : model.getRollData());
+        return Roll.replaceFormulaData(slicedValue, rollData);
     } catch (_) {
         return '';
     }
@@ -809,3 +810,31 @@ export function sortBy(arr, fn) {
     };
     return arr.sort(cmp);
 }
+
+/**
+ * Creates a proxy that allows retrieval of top data but diverts updates to a different object.
+ * Generally used for roll data
+ */
+export function createShallowProxy(obj) {
+    if (obj._isShallowProxy) return obj;
+
+    const overrides = {};
+    return new Proxy(obj, {
+        get(target, prop, receiver) {
+            if (prop === '_isShallowProxy') return true;
+            if (prop in overrides) return overrides[prop];
+            return Reflect.get(target, prop, receiver);
+        },
+        set(_target, prop, newValue) {
+            overrides[prop] = newValue;
+            return true;
+        },
+        deleteProperty(_target, prop) {
+            delete overrides[prop];
+            return true;
+        },
+        has(target, key) {
+            return key in overrides || key in target;
+        }
+    });
+}