Stage 4 Image cleanup

Cull funcs from runtime_img.go which are no longer needed.  Also, fix any remaining
spots that use the old image technique.

Signed-off-by: baude <bbaude@redhat.com>

Closes: #532
Approved by: mheon

1 files changed, 82 insertions, 0 deletions

diff --git a/libpod/image/filters.go b/libpod/image/filters.go
new file mode 100644
index 000000000..20a9efc97
--- /dev/null
+++ b/libpod/image/filters.go
@@ -0,0 +1,82 @@
+package image
+
+import (
+	"strings"
+	"time"
+
+	"github.com/projectatomic/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(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()
+		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 fitler 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
+}