89 lines
1.6 KiB
Go
89 lines
1.6 KiB
Go
package witch
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import "fmt"
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const (
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dirEast = "_DIR_EAST"
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dirWest = "_DIR_WEST"
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dirNorth = "_DIR_NORTH"
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dirSouth = "_DIR_SOUTH"
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dirAbove = "_DIR_ABOVE"
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dirBelow = "_DIR_BELOW"
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)
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type Direction struct {
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raw string
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}
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func NewDirection(raw string) Direction {
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return Direction{raw: raw}
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}
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func (d Direction) Reverse() Direction {
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raw := ""
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switch d.raw {
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case dirAbove:
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raw = dirBelow
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case dirBelow:
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raw = dirAbove
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case dirEast:
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raw = dirWest
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case dirWest:
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raw = dirEast
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case dirNorth:
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raw = dirSouth
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case dirSouth:
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raw = dirNorth
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}
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return NewDirection(raw)
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}
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// NormalizeDirection takes a direction someone might type like "up" or "north" and returns the correct Direction struct
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func NormalizeDirection(humanDir string) (Direction, error) {
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raw := ""
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switch humanDir {
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case "up":
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case "above":
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raw = dirAbove
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case "down":
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case "below":
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raw = dirBelow
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case "east":
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raw = dirEast
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case "west":
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raw = dirWest
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case "north":
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raw = dirNorth
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case "south":
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raw = dirSouth
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default:
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return Direction{}, fmt.Errorf("did not understand direction '%s'", humanDir)
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}
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return NewDirection(raw), nil
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}
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// Human returns a string form of this direction like "above" or "north"
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func (d Direction) Human() (humanDir string) {
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switch d.raw {
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case dirAbove:
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humanDir = "above"
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case dirBelow:
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humanDir = "below"
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case dirEast:
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humanDir = "east"
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case dirWest:
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humanDir = "west"
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case dirNorth:
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humanDir = "north"
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case dirSouth:
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humanDir = "south"
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}
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return humanDir
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}
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func (d Direction) Equals(o Direction) bool {
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return d.raw == o.raw
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}
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