[#527] Add support for select-filter expressions in policy playground

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>

cmd/frostfs-cli/modules/container/policy_playground.go

@@ -82,15 +82,32 @@ func (repl *policyPlaygroundREPL) handleRemove(args []string) error {
 }
 
 func (repl *policyPlaygroundREPL) handleEval(args []string) error {
-	policyStr := strings.Join(args, " ")
-	placementPolicy, err := parseContainerPolicy(repl.cmd, policyStr)
-	if err != nil {
-		return fmt.Errorf("parsing placement policy: %v", err)
-	}
+	policyStr := strings.TrimSpace(strings.Join(args, " "))
+	var nodes [][]netmap.NodeInfo
 	nm := repl.netMap()
-	nodes, err := nm.ContainerNodes(*placementPolicy, nil)
-	if err != nil {
-		return fmt.Errorf("building container nodes: %v", err)
+
+	if strings.HasPrefix(policyStr, "CBF") || strings.HasPrefix(policyStr, "SELECT") || strings.HasPrefix(policyStr, "FILTER") {
+		// Assume that the input is a partial SELECT-FILTER expression.
+		// Full inline policies always start with UNIQUE or REP keywords,
+		// or different prefixes when it's the case of an external file.
+		sfExpr, err := netmap.DecodeSelectFilterString(policyStr)
+		if err != nil {
+			return fmt.Errorf("parsing select-filter expression: %v", err)
+		}
+		nodes, err = nm.SelectFilterNodes(sfExpr)
+		if err != nil {
+			return fmt.Errorf("building select-filter nodes: %v", err)
+		}
+	} else {
+		// Assume that the input is a full policy or input file otherwise.
+		placementPolicy, err := parseContainerPolicy(repl.cmd, policyStr)
+		if err != nil {
+			return fmt.Errorf("parsing placement policy: %v", err)
+		}
+		nodes, err = nm.ContainerNodes(*placementPolicy, nil)
+		if err != nil {
+			return fmt.Errorf("building container nodes: %v", err)
+		}
 	}
 	for i, ns := range nodes {
 		var ids []string

go.mod

@@ -6,7 +6,7 @@ require (
 	git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.15.1-0.20230704092742-285516a94ebe
 	git.frostfs.info/TrueCloudLab/frostfs-contract v0.0.0-20230627134746-36f3d39c406a
 	git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20230531082742-c97d21411eb6
-	git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20230711142135-998fe1a7ab31
+	git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20230717102948-b91f9d8c7910
 	git.frostfs.info/TrueCloudLab/hrw v1.2.1
 	git.frostfs.info/TrueCloudLab/tzhash v1.8.0
 	github.com/cheggaaa/pb v1.0.29