Add the most basic form of a difficulty delta region behaviour

langs/en-ca.json

@@ -11,6 +11,9 @@
 			"shield": "Shield",
 			"skill": "Skill",
 			"weapon": "Weapon"
+		},
+		"RegionBehavior": {
+			"difficultyDelta": "Condition Delta"
 		}
 	},
 	"RipCrypt": {
@@ -154,6 +157,16 @@
 		},
 		"tooltips": {
 			"shield-bonus": "Shield Bonus: {value}"
+		},
+		"region": {
+			"difficultyDelta": {
+				"FIELDS": {
+					"delta": {
+						"label": "Delta",
+						"hint": "How much should actors in this area have their difficulty changed from the global value."
+					}
+				}
+			}
 		}
 	}
 }

module/data/region-behaviors/DifficultyDelta.mjs

@@ -0,0 +1,36 @@
+import { Logger } from "../../utils/Logger.mjs";
+
+const { fields } = foundry.data;
+const { RegionBehaviorType } = foundry.data.regionBehaviors;
+
+export class DifficultyDeltaBehaviorData extends RegionBehaviorType {
+	static LOCALIZATION_PREFIXES = [`RipCrypt.region.difficultyDelta`];
+
+	static defineSchema() {
+		return {
+			delta: new fields.NumberField({
+				required: true,
+				initial: 1,
+			}),
+		};
+	};
+
+	static events = {
+		[CONST.REGION_EVENTS.TOKEN_ENTER]: this.#onTokenEnter,
+		[CONST.REGION_EVENTS.TOKEN_EXIT]: this.#onTokenExit,
+	};
+
+	static async #onTokenEnter(event) {
+		Logger.debug(`token enter`, event, this);
+		const actor = event.data.token.actor;
+		if (!actor) { return };
+		actor.setFlag(`ripcrypt`, `dcDelta`, this.delta);
+	};
+
+	static async #onTokenExit(event) {
+		Logger.debug(`token exit`, event, this);
+		const actor = event.data.token.actor;
+		if (!actor) { return };
+		actor.unsetFlag(`ripcrypt`, `dcDelta`);
+	};
+};

module/hooks/init.mjs

@@ -33,6 +33,7 @@ import { registerDevSettings } from "../settings/devSettings.mjs";
 import { registerMetaSettings } from "../settings/metaSettings.mjs";
 import { registerUserSettings } from "../settings/userSettings.mjs";
 import { registerWorldSettings } from "../settings/worldSettings.mjs";
+import { DifficultyDeltaBehaviorData } from "../data/region-behaviors/DifficultyDelta.mjs";
 
 Hooks.once(`init`, () => {
 	Logger.log(`Initializing`);
@@ -56,6 +57,7 @@ Hooks.once(`init`, () => {
 	CONFIG.Item.dataModels.shield = ShieldData;
 	CONFIG.Item.dataModels.skill = SkillData;
 	CONFIG.Item.dataModels.weapon = WeaponData;
+	CONFIG.RegionBehavior.dataModels.difficultyDelta = DifficultyDeltaBehaviorData;
 	// #endregion
 
 	// #region Class Changes

system.json

@@ -51,6 +51,9 @@
 			"shield": {},
 			"skill": {},
 			"weapon": {}
+		},
+		"RegionBehavior": {
+			"difficultyDelta": {}
 		}
 	}
 }