feat: support merging multiple subscriptions

internal/automation/match.go

@@ -0,0 +1,38 @@
+package automation
+
+import "strings"
+
+// matchProxies filters proxies down to those satisfying every non-empty
+// dimension of m.
+func matchProxies(proxies []ProxyRef, m MatchRule) []ProxyRef {
+	var out []ProxyRef
+	for _, p := range proxies {
+		if len(m.Subscriptions) > 0 && !containsFold(m.Subscriptions, p.Subscription) {
+			continue
+		}
+		if len(m.NameContains) > 0 && !anyContainsFold(m.NameContains, p.OriginalName) {
+			continue
+		}
+		out = append(out, p)
+	}
+	return out
+}
+
+func containsFold(list []string, s string) bool {
+	for _, item := range list {
+		if strings.EqualFold(item, s) {
+			return true
+		}
+	}
+	return false
+}
+
+func anyContainsFold(keywords []string, s string) bool {
+	lower := strings.ToLower(s)
+	for _, kw := range keywords {
+		if strings.Contains(lower, strings.ToLower(kw)) {
+			return true
+		}
+	}
+	return false
+}