feat: initial commit

internal/infrastructure/router/rule_based_router.go

@@ -0,0 +1,44 @@
+package router
+
+import (
+	"context"
+	"regexp"
+	"sort"
+
+	"github.com/paramah/gw_telegram/internal/domain/apperror"
+	"github.com/paramah/gw_telegram/internal/domain/entity"
+)
+
+type Rule struct {
+	Pattern    *regexp.Regexp
+	IntentName string
+	Target     entity.RouteTarget
+	Priority   int
+}
+
+type RuleBasedRouter struct {
+	rules []Rule
+}
+
+func NewRuleBasedRouter(rules []Rule) *RuleBasedRouter {
+	sorted := make([]Rule, len(rules))
+	copy(sorted, rules)
+	sort.Slice(sorted, func(i, j int) bool {
+		return sorted[i].Priority > sorted[j].Priority
+	})
+	return &RuleBasedRouter{rules: sorted}
+}
+
+func (r *RuleBasedRouter) Route(_ context.Context, msg entity.Message) (entity.Route, error) {
+	for _, rule := range r.rules {
+		if rule.Pattern.MatchString(msg.Text) {
+			return entity.Route{
+				Pattern:    rule.Pattern.String(),
+				IntentName: rule.IntentName,
+				Target:     rule.Target,
+				Priority:   rule.Priority,
+			}, nil
+		}
+	}
+	return entity.Route{}, apperror.ErrRouteNotFound
+}