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package scalevalapokalypsi.Model
import scalevalapokalypsi.Model.Entities.*
/** The class `Action` represents actions that a player may take in a text
* adventure game. `Action` objects are constructed on the basis of textual
* commands and are, in effect, parsers for such commands. An action object is
* immutable after creation.
*
* @param input a textual in-game command such as “go east” or “rest”
*/
class Action(input: String):
private val commandText = input.trim.toLowerCase
private val verb = commandText.takeWhile( _ != ' ' )
private val modifiers = commandText.drop(verb.length).trim
/** Causes the given player to take the action represented by this object,
* assuming that the command was understood. Informs the player and the
* entities surrounding it about the result. Returns true if the command
* was understood and possible, false otherwise.
*
* @param actor the acting player
* @return Boolean indicating whether the action possibly taken takes a
* turn or not.
*/
def execute(actor: Player): Boolean =
val oldLocation = actor.location
val resOption: Option[(Boolean, Event)] = this.verb match
case "go" =>
val result = actor.go(this.modifiers)
result.foreach(r =>
if actor.location != oldLocation then
oldLocation.observeEvent(r)
)
result.map((true, _))
case "rest" => Some((true, actor.rest()))
case "get" => Some((false, actor.pickUp(this.modifiers)))
case "say" =>
val to = "to"
val recipient = modifiers.reverse.takeWhile(_ != ' ').reverse
val recipientEntity = actor.location.getEntity(recipient)
val maybeTo = modifiers.slice(
modifiers.length - recipient.length - s"$to ".length,
modifiers.length - recipient.length - 1
)
val message =
modifiers.take(modifiers.length - recipient.length - 4)
if maybeTo == to then
recipientEntity.map(e => (false, actor.sayTo(e, message)))
else
Some((false, actor.say(modifiers)))
case "drop" => Some((false, actor.drop(this.modifiers)))
case "laula" =>
val end = modifiers.takeRight("suohon".length)
val start =
modifiers.take(modifiers.length - "suohon".length).trim
if end == "suohon" then
val targetEntity = actor.location.getEntity(start)
targetEntity
.foreach(e => actor.setSingEffect(DefaultSingAttack(e)))
targetEntity.map(t =>
(false, Event(
Map.from(Vector((t, s"${actor.name} laulaa sinua suohon!"))),
s"${actor.name} laulaa henkilöä ${t.name} suohon."
))
)
else
None
case "xyzzy" => Some((false, Event(
Map.from(Vector((actor, "The grue tastes yummy."))),
s"${actor.name} tastes some grue.")
))
case other => None
val res: (Boolean, Event) = resOption
.getOrElse((false, Event(
Map.from(Vector((actor, "Tuo ei ole asia, jonka voit tehdä."))),
""
)))
actor.location.observeEvent(res(1))
res(0)
/** Returns a textual description of the action object, for debugging purposes. */
override def toString = s"$verb (modifiers: $modifiers)"
end Action
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