/
images_sets.go
62 lines (51 loc) · 1.33 KB
/
images_sets.go
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package image
type ImagesSets [][]*Image
func NewImagesSetsBuilder() *ImagesSetsBuilder {
return &ImagesSetsBuilder{
curSetInd: 0,
nextSetInd: 1,
}
}
type ImagesSetsBuilder struct {
allImages []*Image
imagesSets ImagesSets
curSetInd int
nextSetInd int
}
func (is *ImagesSetsBuilder) GetImagesSets() ImagesSets {
return is.imagesSets
}
func (is *ImagesSetsBuilder) GetAllImages() []*Image {
return is.allImages
}
func (is *ImagesSetsBuilder) MergeImagesSets(newImagesSets [][]*Image) {
for newSetInd, newSet := range newImagesSets {
targetSetInd := is.curSetInd + newSetInd
targetSet := is.getImagesByInd(targetSetInd)
is.setImagesByInd(targetSetInd, append(targetSet, newSet...))
for _, img := range newSet {
is.allImages = append(is.allImages, img)
}
}
nextSetInd := is.curSetInd + len(newImagesSets)
if nextSetInd > is.nextSetInd {
is.nextSetInd = nextSetInd
}
}
func (is *ImagesSetsBuilder) Next() {
is.curSetInd = is.nextSetInd
}
func (is *ImagesSetsBuilder) getImagesByInd(ind int) []*Image {
if ind >= len(is.imagesSets) {
return nil
}
return is.imagesSets[ind]
}
func (is *ImagesSetsBuilder) setImagesByInd(ind int, set []*Image) {
if ind >= len(is.imagesSets) {
is.imagesSets = append(is.imagesSets, make([][]*Image, ind+1-len(is.imagesSets))...)
}
if set != nil {
is.imagesSets[ind] = set
}
}