Trilobytes - No MP? No Problem! plugin

//=============================================================================
// Trilobytes - No MP? No Problem!
// TLB_NoMPNoProblem.js
//=============================================================================

var Imported = Imported || {};
Imported.TLB_NoMPNoProblem = true;

var TLB = TLB || {};
TLB.NoMPNoProblem ??= {};
TLB.NoMPNoProblem.version = 1.00;

/*:
 * @target MZ
 * @plugindesc This plugin allows battlers to attack instead of using a skill
 * or item if they couldn't pay the cost.
 * @author John Clifford/Trihan
 *
 * @help
 * ============================================================================
 * Introduction
 * ============================================================================
 *
 * This plugin causes a battler who can't pay the cost for their chosen skill
 * or item to attempt a normal attack instead.
 *
 * ============================================================================
 * Plugin Commands
 * ============================================================================
 *
 * None
 *
 * ============================================================================
 * Plugin Parameters
 * ============================================================================
 *
 * None
 *
 * ============================================================================
 * Compatibility
 * ============================================================================
 *
 *  May clash with other plugins that affect BattleManager's processTurn.
 *
 * ============================================================================
 * Changelog
 * ============================================================================
 *
 * Version 1.00:
 * - Finished plugin!
 *
 */

Game_BattlerBase.prototype.meetsSkillConditionsBesidesCost = function(skill) {
    return (
        this.meetsUsableItemConditions(skill) &&
        this.isSkillWtypeOk(skill) &&
        !this.isSkillSealed(skill.id) &&
        !this.isSkillTypeSealed(skill.stypeId)
    );
};

TLB.NoMPNoProblem.BattleManager_processTurn = BattleManager.processTurn;
BattleManager.processTurn = function() {
    const subject = this._subject;
    const action = subject.currentAction();
    if (action) {
        action.prepare();
        if (!action.isValid() && subject.meetsSkillConditionsBesidesCost(action.item())) {
            action.setAttack();
        }
    }
    TLB.NoMPNoProblem.BattleManager_processTurn.call(this);
};