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package image
import (
"context"
"strings"
"time"
"github.com/containers/libpod/pkg/inspect"
)
// ResultFilter is a mock function for image filtering
type ResultFilter func(*Image) bool
// Filter is a function to determine whether an image is included in
// command output. Images to be outputted are tested using the function. A true
// return will include the image, a false return will exclude it.
type Filter func(*Image, *inspect.ImageData) bool
// CreatedBeforeFilter allows you to filter on images created before
// the given time.Time
func CreatedBeforeFilter(createTime time.Time) ResultFilter {
return func(i *Image) bool {
return i.Created().Before(createTime)
}
}
// CreatedAfterFilter allows you to filter on images created after
// the given time.Time
func CreatedAfterFilter(createTime time.Time) ResultFilter {
return func(i *Image) bool {
return i.Created().After(createTime)
}
}
// DanglingFilter allows you to filter images for dangling images
func DanglingFilter() ResultFilter {
return func(i *Image) bool {
return i.Dangling()
}
}
// LabelFilter allows you to filter by images labels key and/or value
func LabelFilter(ctx context.Context, labelfilter string) ResultFilter {
// We need to handle both label=key and label=key=value
return func(i *Image) bool {
var value string
splitFilter := strings.Split(labelfilter, "=")
key := splitFilter[0]
if len(splitFilter) > 1 {
value = splitFilter[1]
}
labels, err := i.Labels(ctx)
if err != nil {
return false
}
if len(strings.TrimSpace(labels[key])) > 0 && len(strings.TrimSpace(value)) == 0 {
return true
}
return labels[key] == value
}
}
// OutputImageFilter allows you to filter by an a specific image name
func OutputImageFilter(userImage *Image) ResultFilter {
return func(i *Image) bool {
return userImage.ID() == i.ID()
}
}
// FilterImages filters images using a set of predefined filter funcs
func FilterImages(images []*Image, filters []ResultFilter) []*Image {
var filteredImages []*Image
for _, image := range images {
include := true
for _, filter := range filters {
include = include && filter(image)
}
if include {
filteredImages = append(filteredImages, image)
}
}
return filteredImages
}
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