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package o1game.Model
import scala.collection.mutable.Map
/** The class `Area` represents locations in a text adventure game world. A game world
* consists of areas. In general, an “area” can be pretty much anything: a room, a building,
* an acre of forest, or something completely different. What different areas have in
* common is that players can be located in them and that they can have exits leading to
* other, neighboring areas. An area also has a name and a description.
* @param name the name of the area
* @param description a basic description of the area (typically not including information about items) */
class Area(val name: String, var description: String):
private val neighbors = Map[String, Area]()
private val items: Map[String, Item] = Map()
private val entities: Map[String, Entity] = Map()
/** Returns the area that can be reached from this area by moving in the given direction. The result
* is returned in an `Option`; `None` is returned if there is no exit in the given direction. */
def neighbor(direction: String): Option[Area] =
this.neighbors.get(direction)
def getNeighborNames: Iterable[String] = this.neighbors.keys
def getItemNames: Iterable[String] = this.items.keys
def getEntityNames: Iterable[String] = this.entities.keys
/** Tells whether this area has a neighbor in the given direction.
*
* @param direction the direction to check
* @return whether there is a neighbor in the direction
*/
def hasNeighbor(direction: String): Boolean =
this.neighbors.contains(direction)
/** Adds an exit from this area to the given area. The neighboring area is reached by moving in
* the specified direction from this area. */
def setNeighbor(direction: String, neighbor: Area) =
this.neighbors += direction -> neighbor
/** Adds exits from this area to the given areas. Calling this method is equivalent to calling
* the `setNeighbor` method on each of the given direction–area pairs.
* @param exits contains pairs consisting of a direction and the neighboring area in that direction
* @see [[setNeighbor]] */
def setNeighbors(exits: Vector[(String, Area)]) =
this.neighbors ++= exits
/** Adds the specified item
*
* @param item the item to add
*/
def addItem(item: Item): Unit = this.items += item.name -> item
/** Adds multiple items
*
* @param items a once iterable collection of items to add
*/
def addItems(items: IterableOnce[Item]) =
items.iterator.foreach(i => this.items += i.name -> i)
def hasItem(itemName: String) = this.items.contains(itemName)
/** Removes the specified item if it exists.
*
* @param itemName the name of the item to remove
* @return an option containing the removed item
*/
def removeItem(itemName: String): Option[Item] =
this.items.remove(itemName)
/** Adds the specified entity to the area.
*
* @param entity the entity to add.
*/
def addEntity(entity: Entity): Unit = this.entities += entity.name -> entity
/** Removes the entity with the name `entityName`.
*
* @param entityName the name of the entity to remove
* @return an option containing the removed entity if it was in the area
*/
def removeEntity(entityName: String): Option[Entity] =
this.entities.remove(entityName)
/** Returns a multi-line description of the area as a player sees it. This includes a basic
* description of the area as well as information about exits and items. If there are no
* items present, the return value has the form "DESCRIPTION\n\nExits available:
* DIRECTIONS SEPARATED BY SPACES". If there are one or more items present, the return
* value has the form "DESCRIPTION\nYou see here: ITEMS SEPARATED BY SPACES\n\nExits available:
* DIRECTIONS SEPARATED BY SPACES". The items and directions are listed in an arbitrary order. */
def fullDescription: String =
val exitList = this.neighbors.keys.mkString(" ")
val itemList = this.items.keys.mkString(" ")
val entityList = this.entities.keys.mkString(" ")
val itemDescription =
if this.items.nonEmpty then
s"\nYou see here: ${itemList}"
else ""
val entityDescription =
if this.entities.nonEmpty then
s"\nThere are entities: ${entityList}"
else ""
(this.description +
itemDescription +
entityDescription +
s"\n\nExits available: $exitList")
/** Returns a single-line description of the area for debugging purposes. */
override def toString =
this.name + ": " + this.description.replaceAll("\n", " ").take(150)
end Area
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