Initial

module/data/action/baseAction.mjs

@@ -2,6 +2,7 @@ import DhpActor from '../../documents/actor.mjs';
 import D20RollDialog from '../../applications/dialogs/d20RollDialog.mjs';
 import { ActionMixin } from '../fields/actionField.mjs';
 import { originItemField } from '../chat-message/actorRoll.mjs';
+import TriggerField from '../fields/triggerField.mjs';
 
 const fields = foundry.data.fields;
 
@@ -34,7 +35,8 @@ export default class DHBaseAction extends ActionMixin(foundry.abstract.DataModel
                 nullable: false,
                 required: true
             }),
-            targetUuid: new fields.StringField({ initial: undefined })
+            targetUuid: new fields.StringField({ initial: undefined }),
+            triggers: new fields.ArrayField(new TriggerField())
         };
 
         this.extraSchemas.forEach(s => {
@@ -343,6 +345,10 @@ export class ResourceUpdateMap extends Map {
     }
 
     addResources(resources) {
+        if (!resources?.length) return;
+        const invalidResources = resources.some(resource => !resource.key);
+        if (invalidResources) return;
+
         for (const resource of resources) {
             if (!resource.key) continue;
 

module/data/fields/_module.mjs

@@ -2,5 +2,6 @@ export { ActionCollection } from './actionField.mjs';
 export { default as FormulaField } from './formulaField.mjs';
 export { default as ForeignDocumentUUIDField } from './foreignDocumentUUIDField.mjs';
 export { default as ForeignDocumentUUIDArrayField } from './foreignDocumentUUIDArrayField.mjs';
+export { default as TriggerField } from './triggerField.mjs';
 export { default as MappingField } from './mappingField.mjs';
 export * as ActionFields from './action/_module.mjs';

module/data/fields/triggerField.mjs

@@ -0,0 +1,15 @@
+export default class TriggerField extends foundry.data.fields.SchemaField {
+    constructor(context) {
+        super(
+            {
+                trigger: new foundry.data.fields.StringField({
+                    nullable: false,
+                    initial: CONFIG.DH.TRIGGER.triggers.dualityRoll.id,
+                    choices: CONFIG.DH.TRIGGER.triggers
+                }),
+                command: new foundry.data.fields.JavaScriptField({ async: true })
+            },
+            context
+        );
+    }
+}

module/data/item/base.mjs

@@ -8,7 +8,7 @@
  * @property {boolean} isInventoryItem- Indicates whether items of this type is a Inventory Item
  */
 
-import { addLinkedItemsDiff, createScrollText, getScrollTextData, updateLinkedItemApps } from '../../helpers/utils.mjs';
+import { addLinkedItemsDiff, getScrollTextData, updateLinkedItemApps } from '../../helpers/utils.mjs';
 import { ActionsField } from '../fields/actionField.mjs';
 import FormulaField from '../fields/formulaField.mjs';
 
@@ -135,6 +135,26 @@ export default class BaseDataItem extends foundry.abstract.TypeDataModel {
         return data;
     }
 
+    prepareBaseData() {
+        super.prepareBaseData();
+
+        for (const action of this.actions) {
+            const actionsToRegister = [];
+            for (let i = 0; i < action.triggers.length; i++) {
+                const trigger = action.triggers[i];
+                const fn = new foundry.utils.AsyncFunction('roll', 'actor', `{${trigger.command}\n}`);
+                actionsToRegister.push(fn.bind(action));
+                if (i === action.triggers.length - 1)
+                    game.system.registeredTriggers.registerTriggers(
+                        trigger.trigger,
+                        action.actor?.uuid,
+                        this.parent.uuid,
+                        actionsToRegister
+                    );
+            }
+        }
+    }
+
     async _preCreate(data, options, user) {
         // Skip if no initial action is required or actions already exist
         if (this.metadata.hasInitialAction && foundry.utils.isEmpty(this.actions)) {