From a6e6d848d6f719710a43ca015027bd93befb721d Mon Sep 17 00:00:00 2001
From: Mikhail Osipov <mike.osipov@gmail.com>
Date: Mon, 8 Mar 2021 02:25:01 +0300
Subject: add cmd, hook, socket help

---
 pkg/server/help.go | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 pkg/server/help.go

(limited to 'pkg/server/help.go')

diff --git a/pkg/server/help.go b/pkg/server/help.go
new file mode 100644
index 0000000..16f2776
--- /dev/null
+++ b/pkg/server/help.go
@@ -0,0 +1,77 @@
+package server
+
+import (
+	"fmt"
+	"io"
+
+	"tunnel/pkg/server/hook"
+	"tunnel/pkg/server/opts"
+	"tunnel/pkg/server/socket"
+)
+
+func showHookList(r *request) {
+	for _, h := range hook.GetList() {
+		r.Println(h)
+	}
+}
+
+func showSocketList(r *request) {
+	for _, s := range socket.GetList() {
+		r.Println(s)
+	}
+}
+
+func showUsage(r *request, name, desc string, param []opts.Param) {
+	r.Printf("usage: %s", name)
+
+	for _, p := range param {
+		formatParamShort(r, p)
+	}
+
+	r.Printf("\n\n%s", desc)
+}
+
+func showHookHelp(r *request, name string) {
+	t := hook.GetType(name)
+	if t == nil {
+		r.Fatal("no such hook")
+	}
+
+	showUsage(r, t.Name, t.Desc, t.Param)
+}
+
+func formatParamShort(w io.Writer, p opts.Param) {
+	if !p.Required {
+		fmt.Fprint(w, "[")
+	}
+	fmt.Fprintf(w, ",%s", p.Name)
+
+	if p.Kind != opts.Bool {
+		fmt.Fprintf(w, "=%s", p.Kind)
+
+		if p.Default != "" {
+			fmt.Fprintf(w, "(%s)", p.Default)
+		}
+	}
+
+	if !p.Required {
+		fmt.Fprint(w, "]")
+	}
+}
+
+func showSocketHelp(r *request, name string) {
+	t := socket.GetType(name)
+	if t == nil {
+		r.Fatal("no such socket")
+	}
+
+	showUsage(r, t.Name, t.Desc, t.Param)
+}
+
+func init() {
+	newCmd("hook list", showHookList, "")
+	newCmd("hook help", showHookHelp, "hook-name")
+
+	newCmd("socket list", showSocketList, "")
+	newCmd("socket help", showSocketHelp, "socket-name")
+}
-- 
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