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package main
import "fmt"
// Filter is a filter interface
type Filter interface {
Bounds(srcBounds string) (dstBounds string)
}
// GIFT type
type GIFT struct {
Filters []Filter
}
// New creates a new filter list and initializes it with the given slice of filters.
func New(filters ...Filter) *GIFT {
return &GIFT{
Filters: filters,
}
}
// Bounds calculates the appropriate bounds for the result image after applying all the added filters.
func (g *GIFT) Bounds(srcBounds string) (dstBounds string) {
dstBounds = srcBounds
for _, f := range g.Filters {
dstBounds = f.Bounds(dstBounds)
}
return dstBounds
}
func main() {
var filters []Filter
bounds := "foo"
g := New(filters...)
fmt.Println(g.Bounds(bounds))
}
// Output:
// foo
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