Initial rendering of the node tree

webserver.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	// External
+	"git.ahall.se/go/html_template"
+
+	// Standard
+	"encoding/json"
+	"fmt"
+	"io/fs"
+	"net/http"
+	"strconv"
+)
+
+var (
+	engine HTMLTemplate.Engine
+)
+
+func initWebserver() (err error) {
+	address := fmt.Sprintf("%s:%d", config.Network.Address, config.Network.Port)
+	logger.Info("webserver", "listen", address)
+
+	subViewFS, _ := fs.Sub(viewFS, "views")
+	subStaticFS, _ := fs.Sub(staticFS, "static")
+
+	engine, err = HTMLTemplate.NewEngine(subViewFS, subStaticFS, flagDev)
+	if err != nil {
+		return
+	}
+
+	http.HandleFunc("/", pageIndex)
+	http.HandleFunc("/app", pageApp)
+	http.HandleFunc("/nodes/tree/{startNode}", actionNodesTree)
+
+	err = http.ListenAndServe(address, nil)
+	return
+}
+
+func pageIndex(w http.ResponseWriter, r *http.Request) { // {{{
+	if r.URL.Path == "/" {
+		http.Redirect(w, r, "/app", http.StatusSeeOther)
+	} else {
+		engine.StaticResource(w, r)
+	}
+} // }}}
+
+func pageApp(w http.ResponseWriter, r *http.Request) { // {{{
+	page := NewPage("app")
+	err := engine.Render(page, w, r)
+	if err != nil {
+		w.Write([]byte(err.Error()))
+	}
+} // }}}
+
+func actionNodesTree(w http.ResponseWriter, r *http.Request) { // {{{
+	var err error
+
+	startNode := 0
+	startNodeStr := r.PathValue("startNode")
+	startNode, _ = strconv.Atoi(startNodeStr)
+
+	var maxDepth int
+	if maxDepth, err = strconv.Atoi(r.URL.Query().Get("depth")); err != nil {
+		maxDepth = 3
+	}
+
+	topNode, err := GetNode(startNode, maxDepth)
+	if err != nil {
+		logger.Error("test", "error", err)
+	}
+	
+	j, _ := json.Marshal(topNode)
+	w.Write(j)
+} // }}}