Make States Canceled by Elements (RPG Maker MV)

NIA_StateCancelElement.js

/*:
@plugindesc States Cancelled by Elements
@author armornick

@help

This plugin adds states which are canceled when the inflicted person is hit with
an attack with a certain element.

===   Usage   ===

To make a state which can be canceled by certain elements, use the following notetag:

<canceling-element: n>

where n is one or more element ids. If multiple elements should cancel the state, the
ids should be delimited by comma's.

For example, to make a state get canceled by elements 2 and 8:

<canceling-element: 2, 8>


===   License   ====

Permission is hereby granted, free of charge, to any person obtaining a copy 
of this software and associated documentation files (the "Software"), to deal 
in the Software without restriction, including without limitation the rights 
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 
of the Software, and to permit persons to whom the Software is furnished to do so.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
DEALINGS IN THE SOFTWARE.

*/

(function () {

	//-----------------------------------------------------------------------------
	// DataManager

	const RE_CANCELING_ELEMENT = /<canceling[-_ ]elements?\s*:\s*([^>]+)>/i;

	function preloadStateCancelingElements ($dataStates) {
		for (let state of $dataStates) {
			// skip the state at index 0
			if (state === null) continue;

			let cancelElmt = RE_CANCELING_ELEMENT.exec(state.note);
			if (cancelElmt) {
				let elements = [],
					rawElements = cancelElmt[1].split(",");

				for (let element of rawElements) {
					let numVal = parseInt(element.trim(), 10);
					if (!isNaN(numVal)) {
						elements.push(numVal);
					}
				}

				state.cancelingElements = elements;
			}
		}
	}

	var NIA_StateCancelElement_DataManager_onLoad = DataManager.onLoad;
	DataManager.onLoad = function(object) {
		NIA_StateCancelElement_DataManager_onLoad.call(this, object);
		if (object === $dataStates) {
			preloadStateCancelingElements(object);
		}
	};

	//-----------------------------------------------------------------------------
	// Game_Action

	var NIA_StateCancelElement_GameAction_makeDamageValue = Game_Action.prototype.makeDamageValue;
	Game_Action.prototype.makeDamageValue = function(target, critical) {
		var value = NIA_StateCancelElement_GameAction_makeDamageValue.call(this, target, critical);
		this.calculateElementsCancelingState(target);
		return value;
	};

	Game_Action.prototype.calculateElementsCancelingState = function (target) {
		var attackerElement = this.item().damage.elementId,
			states = target.states();

		for (let state of states) {
			if (state.cancelingElements 
				&& state.cancelingElements.contains(attackerElement)) {
				target.removeState(state.id);
			}
		}
	};

}())