move stuff back from nostr package to top level.

because otherwise the path must be specified as github.com/fiatjaf/go-nostr/nostr, which is annoying.

helpers.go

@@ -0,0 +1,77 @@
+package nostr
+
+import (
+	"strings"
+)
+
+type StringList []string
+type IntList []int
+
+func (as StringList) Equals(bs StringList) bool {
+	if len(as) != len(bs) {
+		return false
+	}
+
+	for _, a := range as {
+		for _, b := range bs {
+			if b == a {
+				goto next
+			}
+		}
+		// didn't find a B that corresponded to the current A
+		return false
+
+	next:
+		continue
+	}
+
+	return true
+}
+
+func (as IntList) Equals(bs IntList) bool {
+	if len(as) != len(bs) {
+		return false
+	}
+
+	for _, a := range as {
+		for _, b := range bs {
+			if b == a {
+				goto next
+			}
+		}
+		// didn't find a B that corresponded to the current A
+		return false
+
+	next:
+		continue
+	}
+
+	return true
+}
+
+func (haystack StringList) Contains(needle string) bool {
+	for _, hay := range haystack {
+		if hay == needle {
+			return true
+		}
+	}
+	return false
+}
+
+func (haystack StringList) ContainsPrefixOf(needle string) bool {
+	for _, hay := range haystack {
+		if strings.HasPrefix(needle, hay) {
+			return true
+		}
+	}
+	return false
+}
+
+func (haystack IntList) Contains(needle int) bool {
+	for _, hay := range haystack {
+		if hay == needle {
+			return true
+		}
+	}
+	return false
+}