steel-lord/entity/entity.go

package entity

import (
	"steel/interfaces"

	"github.com/kettek/goro"
)

type Entity struct {
	x, y  int
	rune  rune
	style goro.Style
	name  string
	flags uint
}

// NewEntity returns an interface to a new populated Entity.
func NewEntity(x int, y int, r rune, style goro.Style, name string, flags uint) interfaces.Entity {
	return &Entity{
		x:     x,
		y:     y,
		rune:  r,
		style: style,
		name:  name,
		flags: flags,
	}
}

// Move moves the entity by a given amount.
func (e *Entity) Move(x, y int) {
	e.x += x
	e.y += y
}

// X returns the entity's X value.
func (e *Entity) X() int {
	return e.x
}

// SetX sets the entity's x value
func (e *Entity) SetX(x int) {
	e.x = x
}

// Y returns the entity's Y value.
func (e *Entity) Y() int {
	return e.y
}

// SetY sets the entity's Y value
func (e *Entity) SetY(y int) {
	e.y = y
}

// Rune returns the entity's rune.
func (e *Entity) Rune() rune {
	return e.rune
}

// SetRune sets the entity's rune.
func (e *Entity) SetRune(r rune) {
	e.rune = r
}

// Style returns the entity's style.
func (e *Entity) Style() goro.Style {
	return e.style
}

// SetStyle sets the entity's style.
func (e *Entity) SetStyle(style goro.Style) {
	e.style = style
}

// Name gets the entity's name.
func (e *Entity) Name() string {
	return e.name
}

// SetName sets the entity's name.
func (e *Entity) SetName(n string) {
	e.name = n
}

// Flags gets the entity's flags.
func (e *Entity) Flags() uint {
	return e.flags
}

// SetFlags sets the entity's flags.
func (e *Entity) SetFlags(f uint) {
	e.flags = f
}

// FindEntityAtLocation finds and returns the first entity at x and y matching the provided flags. If none exists, it returns nil.
func FindEntityAtLocation(entities []interfaces.Entity, x, y int, checkMask uint, matchFlags uint) interfaces.Entity {
	for _, e := range entities {
		if (e.Flags()&checkMask) == matchFlags && e.X() == x && e.Y() == y {
			return e
		}
	}
	return nil
}