Containers prune endpoint should use only prune filters

Containers endpoints for HTTP compad and libpod APIs allowed usage of list HTTP
endpoint filter funcs. Documentation in case of libpod and compat API does not allow that.
This commit aligns code with the documentation.

Signed-off-by: Jakub Guzik <jakubmguzik@gmail.com>

1 files changed, 27 insertions, 10 deletions

diff --git a/pkg/domain/filters/containers.go b/pkg/domain/filters/containers.go
index 84cf03764..19d704da1 100644
--- a/pkg/domain/filters/containers.go
+++ b/pkg/domain/filters/containers.go
@@ -165,16 +165,7 @@ func GenerateContainerFilterFuncs(filter string, filterValues []string, r *libpo
 			return false
 		}, nil
 	case "until":
-		until, err := util.ComputeUntilTimestamp(filterValues)
-		if err != nil {
-			return nil, err
-		}
-		return func(c *libpod.Container) bool {
-			if !until.IsZero() && c.CreatedTime().After((until)) {
-				return true
-			}
-			return false
-		}, nil
+		return prepareUntilFilterFunc(filterValues)
 	case "pod":
 		var pods []*libpod.Pod
 		for _, podNameOrID := range filterValues {
@@ -226,3 +217,29 @@ func GenerateContainerFilterFuncs(filter string, filterValues []string, r *libpo
 	}
 	return nil, errors.Errorf("%s is an invalid filter", filter)
 }
+
+// GeneratePruneContainerFilterFuncs return ContainerFilter functions based of filter for prune operation
+func GeneratePruneContainerFilterFuncs(filter string, filterValues []string, r *libpod.Runtime) (func(container *libpod.Container) bool, error) {
+	switch filter {
+	case "label":
+		return func(c *libpod.Container) bool {
+			return util.MatchLabelFilters(filterValues, c.Labels())
+		}, nil
+	case "until":
+		return prepareUntilFilterFunc(filterValues)
+	}
+	return nil, errors.Errorf("%s is an invalid filter", filter)
+}
+
+func prepareUntilFilterFunc(filterValues []string) (func(container *libpod.Container) bool, error) {
+	until, err := util.ComputeUntilTimestamp(filterValues)
+	if err != nil {
+		return nil, err
+	}
+	return func(c *libpod.Container) bool {
+		if !until.IsZero() && c.CreatedTime().After((until)) {
+			return true
+		}
+		return false
+	}, nil
+}