7 files changed, 83 insertions, 19 deletions
diff --git a/pkg/api/handlers/compat/networks.go b/pkg/api/handlers/compat/networks.go
index dfb1d7fda..7e06cad66 100644
--- a/pkg/api/handlers/compat/networks.go
+++ b/pkg/api/handlers/compat/networks.go
@@ -400,10 +400,24 @@ func Disconnect(w http.ResponseWriter, r *http.Request) {
 
 // Prune removes unused networks
 func Prune(w http.ResponseWriter, r *http.Request) {
-	// TODO Filters are not implemented
 	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	filters, err := filtersFromRequest(r)
+	if err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "Decode()"))
+		return
+	}
+	filterMap := map[string][]string{}
+	for _, filter := range filters {
+		split := strings.SplitN(filter, "=", 2)
+		if len(split) > 1 {
+			filterMap[split[0]] = append(filterMap[split[0]], split[1])
+		}
+	}
+
 	ic := abi.ContainerEngine{Libpod: runtime}
-	pruneOptions := entities.NetworkPruneOptions{}
+	pruneOptions := entities.NetworkPruneOptions{
+		Filters: filterMap,
+	}
 	pruneReports, err := ic.NetworkPrune(r.Context(), pruneOptions)
 	if err != nil {
 		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
diff --git a/pkg/api/handlers/libpod/networks.go b/pkg/api/handlers/libpod/networks.go
index a6c4f6d64..5982f50a7 100644
--- a/pkg/api/handlers/libpod/networks.go
+++ b/pkg/api/handlers/libpod/networks.go
@@ -177,10 +177,23 @@ func ExistsNetwork(w http.ResponseWriter, r *http.Request) {
 
 // Prune removes unused networks
 func Prune(w http.ResponseWriter, r *http.Request) {
-	// TODO Filters are not implemented
 	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	decoder := r.Context().Value("decoder").(*schema.Decoder)
+	query := struct {
+		Filters map[string][]string `schema:"filters"`
+	}{
+		// override any golang type defaults
+	}
+
+	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
+		return
+	}
+
+	pruneOptions := entities.NetworkPruneOptions{
+		Filters: query.Filters,
+	}
 	ic := abi.ContainerEngine{Libpod: runtime}
-	pruneOptions := entities.NetworkPruneOptions{}
 	pruneReports, err := ic.NetworkPrune(r.Context(), pruneOptions)
 	if err != nil {
 		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
diff --git a/pkg/api/server/register_networks.go b/pkg/api/server/register_networks.go
index c54de952f..a07c6a55e 100644
--- a/pkg/api/server/register_networks.go
+++ b/pkg/api/server/register_networks.go
@@ -172,7 +172,6 @@ func (s *APIServer) registerNetworkHandlers(r *mux.Router) error {
 	//    name: filters
 	//    type: string
 	//    description: |
-	//      NOT IMPLEMENTED
 	//      Filters to process on the prune list, encoded as JSON (a map[string][]string).
 	//      Available filters:
 	//        - until=<timestamp> Prune networks created before this timestamp. The <timestamp> can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. 10m, 1h30m) computed relative to the daemon machine’s time.
diff --git a/pkg/domain/entities/network.go b/pkg/domain/entities/network.go
index f66a7f575..a89501664 100644
--- a/pkg/domain/entities/network.go
+++ b/pkg/domain/entities/network.go
@@ -92,4 +92,6 @@ type NetworkPruneReport struct {
 
 // NetworkPruneOptions describes options for pruning
 // unused cni networks
-type NetworkPruneOptions struct{}
+type NetworkPruneOptions struct {
+	Filters map[string][]string
+}
diff --git a/pkg/domain/filters/containers.go b/pkg/domain/filters/containers.go
index 98b8f7e88..02727e841 100644
--- a/pkg/domain/filters/containers.go
+++ b/pkg/domain/filters/containers.go
@@ -8,7 +8,6 @@ import (
 	"github.com/containers/podman/v3/libpod"
 	"github.com/containers/podman/v3/libpod/define"
 	"github.com/containers/podman/v3/pkg/network"
-	"github.com/containers/podman/v3/pkg/timetype"
 	"github.com/containers/podman/v3/pkg/util"
 	"github.com/pkg/errors"
 )
@@ -186,18 +185,10 @@ func GenerateContainerFilterFuncs(filter string, filterValues []string, r *libpo
 			return false
 		}, nil
 	case "until":
-		if len(filterValues) != 1 {
-			return nil, errors.Errorf("specify exactly one timestamp for %s", filter)
-		}
-		ts, err := timetype.GetTimestamp(filterValues[0], time.Now())
-		if err != nil {
-			return nil, err
-		}
-		seconds, nanoseconds, err := timetype.ParseTimestamps(ts, 0)
+		until, err := util.ComputeUntilTimestamp(filter, filterValues)
 		if err != nil {
 			return nil, err
 		}
-		until := time.Unix(seconds, nanoseconds)
 		return func(c *libpod.Container) bool {
 			if !until.IsZero() && c.CreatedTime().After((until)) {
 				return true
diff --git a/pkg/domain/infra/abi/network.go b/pkg/domain/infra/abi/network.go
index edde8ece6..1a833332c 100644
--- a/pkg/domain/infra/abi/network.go
+++ b/pkg/domain/infra/abi/network.go
@@ -174,17 +174,37 @@ func (ic *ContainerEngine) NetworkPrune(ctx context.Context, options entities.Ne
 	if err != nil {
 		return nil, err
 	}
+	networks, err := network.LoadCNIConfsFromDir(network.GetCNIConfDir(runtimeConfig))
+	if err != nil {
+		return nil, err
+	}
+
 	// Gather up all the non-default networks that the
 	// containers want
-	usedNetworks := make(map[string]bool)
+	networksToKeep := make(map[string]bool)
 	for _, c := range cons {
 		nets, _, err := c.Networks()
 		if err != nil {
 			return nil, err
 		}
 		for _, n := range nets {
-			usedNetworks[n] = true
+			networksToKeep[n] = true
+		}
+	}
+	if len(options.Filters) != 0 {
+		for _, n := range networks {
+			// This network will be kept anyway
+			if _, found := networksToKeep[n.Name]; found {
+				continue
+			}
+			ok, err := network.IfPassesPruneFilter(runtimeConfig, n, options.Filters)
+			if err != nil {
+				return nil, err
+			}
+			if !ok {
+				networksToKeep[n.Name] = true
+			}
 		}
 	}
-	return network.PruneNetworks(runtimeConfig, usedNetworks)
+	return network.PruneNetworks(runtimeConfig, networksToKeep)
 }
diff --git a/pkg/util/filters.go b/pkg/util/filters.go
new file mode 100644
index 000000000..bf16f89e3
--- /dev/null
+++ b/pkg/util/filters.go
@@ -0,0 +1,25 @@
+package util
+
+import (
+	"time"
+
+	"github.com/containers/podman/v3/pkg/timetype"
+	"github.com/pkg/errors"
+)
+
+// ComputeUntilTimestamp extracts unitil timestamp from filters
+func ComputeUntilTimestamp(filter string, filterValues []string) (time.Time, error) {
+	invalid := time.Time{}
+	if len(filterValues) != 1 {
+		return invalid, errors.Errorf("specify exactly one timestamp for %s", filter)
+	}
+	ts, err := timetype.GetTimestamp(filterValues[0], time.Now())
+	if err != nil {
+		return invalid, err
+	}
+	seconds, nanoseconds, err := timetype.ParseTimestamps(ts, 0)
+	if err != nil {
+		return invalid, err
+	}
+	return time.Unix(seconds, nanoseconds), nil
+}