/
channel.go
65 lines (58 loc) · 1.56 KB
/
channel.go
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package util
// Channel defines the type for the "channel" enum field.
type Channel string
// Channel values.
const (
ChannelRed Channel = "RED"
ChannelGreen Channel = "GREEN"
ChannelBlue Channel = "BLUE"
ChannelRedGreen Channel = "RED_GREEN"
ChannelRedBlue Channel = "RED_BLUE"
ChannelGreenBlue Channel = "GREEN_BLUE"
ChannelRedGreenBlue Channel = "RED_GREEN_BLUE"
)
// String returns a string representation of the Channel.
func (c Channel) String() string {
return string(c)
}
// IncludesRed returns whether the Channel includes Channel with red value.
func (c Channel) IncludesRed() bool {
switch c {
case ChannelRed, ChannelRedGreen, ChannelRedBlue, ChannelRedGreenBlue:
return true
default:
return false
}
}
// IncludesGreen returns whether the Channel includes Channel with green value.
func (c Channel) IncludesGreen() bool {
switch c {
case ChannelGreen, ChannelRedGreen, ChannelGreenBlue, ChannelRedGreenBlue:
return true
default:
return false
}
}
// IncludesBlue returns whether the Channel includes Channel with blue value.
func (c Channel) IncludesBlue() bool {
switch c {
case ChannelBlue, ChannelRedBlue, ChannelGreenBlue, ChannelRedGreenBlue:
return true
default:
return false
}
}
// Count returns the number of color channels included in the Channel.
func (c Channel) Count() int {
switch c {
case ChannelRed, ChannelGreen, ChannelBlue:
return 1
case ChannelRedGreen, ChannelRedBlue, ChannelGreenBlue:
return 2
case ChannelRedGreenBlue:
return 3
default:
// should be unreachable
return 0
}
}