platform: modularize api/gui, add docs-tests-web foundation, and refresh root config

selective-vpn-api/app/resolver/wildcard_matcher.go

@@ -0,0 +1,70 @@
+package resolver
+
+import "strings"
+
+type WildcardMatcher struct {
+	exact  map[string]struct{}
+	suffix []string
+}
+
+func NormalizeWildcardDomain(raw string) string {
+	d := strings.TrimSpace(strings.SplitN(raw, "#", 2)[0])
+	d = strings.ToLower(d)
+	d = strings.TrimPrefix(d, "*.")
+	d = strings.TrimPrefix(d, ".")
+	d = strings.TrimSuffix(d, ".")
+	return d
+}
+
+func NewWildcardMatcher(domains []string) WildcardMatcher {
+	seen := map[string]struct{}{}
+	m := WildcardMatcher{exact: map[string]struct{}{}}
+	for _, raw := range domains {
+		d := NormalizeWildcardDomain(raw)
+		if d == "" {
+			continue
+		}
+		if _, ok := seen[d]; ok {
+			continue
+		}
+		seen[d] = struct{}{}
+		m.exact[d] = struct{}{}
+		m.suffix = append(m.suffix, "."+d)
+	}
+	return m
+}
+
+func (m WildcardMatcher) Match(host string) bool {
+	if len(m.exact) == 0 {
+		return false
+	}
+	h := strings.TrimSuffix(strings.ToLower(strings.TrimSpace(host)), ".")
+	if h == "" {
+		return false
+	}
+	if _, ok := m.exact[h]; ok {
+		return true
+	}
+	for _, suffix := range m.suffix {
+		if strings.HasSuffix(h, suffix) {
+			return true
+		}
+	}
+	return false
+}
+
+func (m WildcardMatcher) IsExact(host string) bool {
+	if len(m.exact) == 0 {
+		return false
+	}
+	h := strings.TrimSuffix(strings.ToLower(strings.TrimSpace(host)), ".")
+	if h == "" {
+		return false
+	}
+	_, ok := m.exact[h]
+	return ok
+}
+
+func (m WildcardMatcher) Count() int {
+	return len(m.exact)
+}