all: sync with master; upd chlog

internal/aghnet/ignore.go

@@ -0,0 +1,56 @@
+package aghnet
+
+import (
+	"strings"
+
+	"github.com/AdguardTeam/urlfilter"
+	"github.com/AdguardTeam/urlfilter/filterlist"
+	"golang.org/x/exp/slices"
+)
+
+// IgnoreEngine contains the list of rules for ignoring hostnames and matches
+// them.
+//
+// TODO(s.chzhen):  Move all urlfilter stuff to aghfilter.
+type IgnoreEngine struct {
+	// engine is the filtering engine that can match rules for ignoring
+	// hostnames.
+	engine *urlfilter.DNSEngine
+
+	// ignored is the list of rules for ignoring hostnames.
+	ignored []string
+}
+
+// NewIgnoreEngine creates a new instance of the IgnoreEngine and stores the
+// list of rules for ignoring hostnames.
+func NewIgnoreEngine(ignored []string) (e *IgnoreEngine, err error) {
+	ruleList := &filterlist.StringRuleList{
+		RulesText:      strings.ToLower(strings.Join(ignored, "\n")),
+		IgnoreCosmetic: true,
+	}
+	ruleStorage, err := filterlist.NewRuleStorage([]filterlist.RuleList{ruleList})
+	if err != nil {
+		return nil, err
+	}
+
+	return &IgnoreEngine{
+		engine:  urlfilter.NewDNSEngine(ruleStorage),
+		ignored: ignored,
+	}, nil
+}
+
+// Has returns true if IgnoreEngine matches the host.
+func (e *IgnoreEngine) Has(host string) (ignore bool) {
+	if e == nil {
+		return false
+	}
+
+	_, ignore = e.engine.Match(host)
+
+	return ignore
+}
+
+// Values returns a copy of list of rules for ignoring hostnames.
+func (e *IgnoreEngine) Values() (ignored []string) {
+	return slices.Clone(e.ignored)
+}