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vendor/github.com/a-h/gemini/mux/route.go

@@ -0,0 +1,69 @@
+package mux
+
+import (
+	"strings"
+)
+
+// Route is an array of segments.
+type Route struct {
+	Pattern  string
+	Segments []*Segment
+}
+
+// NewRoute creates a route based on a pattern, e.g /users/{userid}.
+func NewRoute(pattern string) *Route {
+	var r Route
+	r.Pattern = pattern
+
+	pattern = strings.TrimSuffix(pattern, "/")
+	pattern = strings.TrimPrefix(pattern, "/")
+
+	for _, seg := range strings.Split(pattern, "/") {
+		ps := &Segment{
+			Name: seg,
+		}
+		if seg == "*" {
+			ps.IsWildcard = true
+		}
+		if strings.HasPrefix(seg, "{") && strings.HasSuffix(seg, "}") {
+			ps.IsVariable = true
+			ps.Name = strings.TrimSuffix(strings.TrimPrefix(seg, "{"), "}")
+		}
+		r.Segments = append(r.Segments, ps)
+	}
+
+	return &r
+}
+
+// Match returns whether the route was matched, and extracts variables.
+func (r Route) Match(segments []string) (vars map[string]string, ok bool) {
+	vars = make(map[string]string)
+	var wildcard bool
+	for i := 0; i < len(r.Segments); i++ {
+		routeSegment := r.Segments[len(r.Segments)-1-i]
+		inputSegmentIndex := len(segments) - 1 - i
+		var inputSegment string
+		if inputSegmentIndex > -1 {
+			inputSegment = segments[inputSegmentIndex]
+		}
+		name, capture, wildcardMatch, matches := routeSegment.Match(inputSegment)
+		if matches {
+			if wildcardMatch {
+				wildcard = true
+			} else {
+				wildcard = false
+			}
+		}
+		if wildcard {
+			matches = true
+		}
+		if !matches {
+			return
+		}
+		if capture {
+			vars[name] = inputSegment
+		}
+	}
+	ok = true
+	return
+}