From 29b860470bfe69fb66730847ff2b1cbf274a08ec Mon Sep 17 00:00:00 2001
From: Nazar Kanaev <nkanaev@live.com>
Date: Sun, 28 Jun 2020 00:28:22 +0100
Subject: [PATCH] basic server

---
 main.go            |  5 +++-
 server/handlers.go | 23 +++++++++++++++
 server/server.go   | 73 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 100 insertions(+), 1 deletion(-)
 create mode 100644 server/handlers.go
 create mode 100644 server/server.go

diff --git a/main.go b/main.go
index e6486e3..9351892 100644
--- a/main.go
+++ b/main.go
@@ -2,7 +2,8 @@ package main
 
 import (
 	"github.com/nkanaev/yarr/storage"
-	"github.com/nkanaev/yarr/worker"
+	//"github.com/nkanaev/yarr/worker"
+	"github.com/nkanaev/yarr/server"
 	"log"
 )
 
@@ -72,4 +73,6 @@ func main() {
 	log.Print(worker.FindFeeds("https://horriblesubs.info/"))
 	log.Print(worker.FindFeeds("http://daringfireball.net/"))
 	*/
+	srv := server.New()
+	srv.ListenAndServe()
 }
diff --git a/server/handlers.go b/server/handlers.go
new file mode 100644
index 0000000..79204a1
--- /dev/null
+++ b/server/handlers.go
@@ -0,0 +1,23 @@
+package server
+
+import "net/http"
+
+func Index(rw http.ResponseWriter, req *http.Request) {
+	rw.Write([]byte("index"))
+}
+
+func Static(rw http.ResponseWriter, req *http.Request) {
+	rw.Write([]byte("static:" + Vars(req)["path"]))
+}
+
+func FolderList(rw http.ResponseWriter, req *http.Request) {
+}
+
+func Folder(rw http.ResponseWriter, req *http.Request) {
+}
+
+func FeedList(rw http.ResponseWriter, req *http.Request) {
+}
+
+func Feed(rw http.ResponseWriter, req *http.Request) {
+}
diff --git a/server/server.go b/server/server.go
new file mode 100644
index 0000000..f9cbbe4
--- /dev/null
+++ b/server/server.go
@@ -0,0 +1,73 @@
+package server
+
+import (
+	"context"
+	"regexp"
+	"net/http"
+)
+
+type Route struct {
+	url string
+	urlRegex *regexp.Regexp
+	handler func(http.ResponseWriter, *http.Request)
+}
+
+type Handler struct {
+}
+
+func p(path string, handler func(http.ResponseWriter, *http.Request)) Route {
+	var urlRegexp string
+	urlRegexp = regexp.MustCompile(`[\*\:]\w+`).ReplaceAllStringFunc(path, func(m string) string {
+		if m[0:1] == `*` {
+			return "(?P<" + m[1:] + ">.+)"
+		}
+		return "(?P<" + m[1:] + ">[^/]+)"
+	})
+	urlRegexp = "^" + urlRegexp + "$"
+	return Route{
+		url: path,
+		urlRegex: regexp.MustCompile(urlRegexp),
+		handler: handler,
+	}
+}
+
+var routes []Route = []Route{
+	p("/", Index),
+	p("/static/*path", Static),
+	p("/api/folders", FolderList),
+	p("/api/folders/:id", Folder),
+	p("/api/feeds", FeedList),
+	p("/api/feeds/:id", Feed),
+}
+
+func Vars(req *http.Request) map[string]string {
+	if rv := req.Context().Value(0); rv != nil {
+		return rv.(map[string]string)
+	}
+	return nil
+}
+
+func (h Handler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	for _, route := range routes {
+		if route.urlRegex.MatchString(req.URL.Path) {
+			if route.urlRegex.NumSubexp() > 0 {
+				vars := make(map[string]string)
+				matches := route.urlRegex.FindStringSubmatchIndex(req.URL.Path)
+				for i, key := range route.urlRegex.SubexpNames()[1:] {
+					vars[key] = req.URL.Path[matches[i*2+2]:matches[i*2+3]]
+				}
+				ctx := context.WithValue(req.Context(), 0, vars)
+				req = req.WithContext(ctx)	
+			}
+			route.handler(rw, req)
+			return
+		}
+	}
+	rw.WriteHeader(http.StatusNotFound)
+}
+
+func New() *http.Server {
+	h := Handler{}
+	s := &http.Server{Addr: "127.0.0.1:8000", Handler: h}
+	return s
+}