0ad/binaries/data/mods/public/simulation/components/AlertRaiser.js

function AlertRaiser() {}

AlertRaiser.prototype.Schema = 	
	"<element name='MaximumLevel'><data type='nonNegativeInteger'/></element>" +
	"<element name='Range'><data type='nonNegativeInteger'/></element>";

AlertRaiser.prototype.Init = function() 
{
    this.level = 0;
	
	// Remember the units ordered to garrison
	this.garrisonedUnits = [];
	this.walkingUnits = [];
};

AlertRaiser.prototype.GetLevel = function()
{
	return this.level;
};

AlertRaiser.prototype.HasRaisedAlert = function()
{
	return this.level > 0;
};

AlertRaiser.prototype.CanIncreaseLevel = function()
{
	return this.template.MaximumLevel > this.level;
};

AlertRaiser.prototype.SoundAlert = function()
{
	var alertString = "alert" + this.level;
	PlaySound(alertString, this.entity);
};

AlertRaiser.prototype.IncreaseAlertLevel = function()
{
	if(!this.CanIncreaseLevel())
		return false;
	
	// Find units owned by this unit's player
	var players = [];
	var cmpOwnership = Engine.QueryInterface(this.entity, IID_Ownership);
	if (cmpOwnership)
		players = [cmpOwnership.GetOwner()];
		
	this.level++;
	this.SoundAlert();
	
	// Select units to put under alert, ignoring domestic animals (NB : war dogs are not domestic)
	var rangeMan = Engine.QueryInterface(SYSTEM_ENTITY, IID_RangeManager);
	var level = this.GetLevel();
	var units = rangeMan.ExecuteQuery(this.entity, 0, this.template.Range, players, IID_UnitAI).filter( function(e){
		var cmpUnitAI = Engine.QueryInterface(e, IID_UnitAI);
		return (!cmpUnitAI.IsUnderAlert() && cmpUnitAI.ReactsToAlert(level) && !cmpUnitAI.IsDomestic());
		});
	
	for each(var unit in units)
	{
		var cmpUnitAI = Engine.QueryInterface(unit, IID_UnitAI);
		cmpUnitAI.ReplaceOrder("Alert", {"raiser": this.entity, "force": true});
		this.walkingUnits.push(unit);
	}
	
	return true;
};

AlertRaiser.prototype.OnUnitGarrisonedAfterAlert = function(msg)
{
	this.garrisonedUnits.push({"holder": msg.holder, "unit": msg.unit});
	
	var index = this.walkingUnits.indexOf(msg.unit);
	if (index != -1)
		this.walkingUnits.splice(index, 1);
	
}

AlertRaiser.prototype.EndOfAlert = function()
{
	this.level = 0;
	this.SoundAlert();
	
	// First, handle units not yet garrisoned
	for each(var unit in this.walkingUnits)
	{
		var cmpUnitAI = Engine.QueryInterface(unit, IID_UnitAI);
		
		cmpUnitAI.ResetAlert();
			
		if (cmpUnitAI.HasWorkOrders())
			cmpUnitAI.BackToWork();
		else
			cmpUnitAI.ReplaceOrder("Stop", undefined);
	}
	this.walkingUnits = [];
	
	// Then, eject garrisoned units
	for each(var slot in this.garrisonedUnits)
	{
		var cmpGarrisonHolder = Engine.QueryInterface(slot.holder, IID_GarrisonHolder);
		var cmpUnitAI = Engine.QueryInterface(slot.unit, IID_UnitAI);
		
		if(cmpGarrisonHolder && cmpGarrisonHolder.PerformEject([slot.unit], true))
		{
			cmpUnitAI.ResetAlert();				
			if (cmpUnitAI.HasWorkOrders())
				cmpUnitAI.BackToWork();
		}
	}
	this.garrisonedUnits = [];
	
	return true;
};

Engine.RegisterComponentType(IID_AlertRaiser, "AlertRaiser", AlertRaiser);