new and improved Resolver.

device/Resolver.go

@@ -0,0 +1,5 @@
+package device
+
+type Resolver interface {
+	Resolve(pattern string) []Pointer
+}

device/pointer.go

@@ -0,0 +1,65 @@
+package device
+
+import (
+	"strings"
+)
+
+type PointerMatcher interface {
+	Match(str string) bool
+}
+
+type Pointer struct {
+	ID      string   `json:"id"`
+	Aliases []string `json:"aliases"`
+}
+
+func (p *Pointer) AddAlias(alias string) {
+	if strings.HasPrefix(alias, "lucifer:name:") {
+		for i, alias2 := range p.Aliases {
+			if strings.HasPrefix(alias2, "lucifer:name:") {
+				p.Aliases = append(p.Aliases[:i], p.Aliases[i+1:]...)
+				break
+			}
+		}
+	}
+
+	for _, alias2 := range p.Aliases {
+		if alias2 == alias {
+			return
+		}
+	}
+
+	p.Aliases = append(p.Aliases, alias)
+}
+
+func (p *Pointer) RemoveAlias(alias string) {
+	for i, alias2 := range p.Aliases {
+		if alias2 == alias {
+			p.Aliases = append(p.Aliases[:i], p.Aliases[i+1:]...)
+			break
+		}
+	}
+}
+
+func (p *Pointer) Name() string {
+	for _, alias := range p.Aliases {
+		if strings.HasPrefix(alias, "lucifer:name:") {
+			return alias
+		}
+	}
+
+	return ""
+}
+
+func (p *Pointer) Matches(matcher PointerMatcher) bool {
+	if matcher.Match(p.ID) {
+		return true
+	}
+	for _, alias := range p.Aliases {
+		if matcher.Match(alias) {
+			return true
+		}
+	}
+
+	return false
+}