feat: implement minimal router

1 files changed, 59 insertions, 0 deletions

diff --git a/router.go b/router.go
index aa10769..5428701 100644
--- a/router.go
+++ b/router.go
@@ -1 +1,60 @@
 package growel
+
+import (
+	"strings"
+)
+
+type route struct {
+	method  string
+	parts   []string
+	handler Handler
+}
+
+type Router struct {
+	routes []route
+}
+
+func NewRouter() *Router {
+	return &Router{}
+}
+
+func (r *Router) Add(method, path string, h Handler) {
+	parts := strings.Split(path, "/")
+	r.routes = append(r.routes, route{method, parts, h})
+}
+
+func (r *Router) Find(method, path string) (Handler, map[string]string) {
+	parts := strings.Split(path, "/")
+
+	for _, rt := range r.routes {
+		// match HTTP method
+		if rt.method != method {
+			continue
+		}
+
+		// match path part number
+		if len(rt.parts) != len(parts) {
+			continue
+		}
+
+		// compare each segment
+		params := make(map[string]string)
+		matched := true
+		for i, seg := range rt.parts {
+			// parse dynamic parameter
+			if strings.HasPrefix(seg, ":") {
+				params[seg[1:]] = parts[i]
+			}
+
+			// static mismatch
+			if seg != parts[i] {
+				matched = false
+				break
+			}
+		}
+		if matched {
+			return rt.handler, params
+		}
+	}
+	return nil, nil
+}