From 9a292fba943529e7465c24cd3283d097fcb05764 Mon Sep 17 00:00:00 2001
From: bodqhrohro <bodqhrohro@gmail.com>
Date: Tue, 26 Nov 2019 02:04:11 +0200
Subject: [PATCH] Add help command

---
 telegram/commands.go | 96 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)

diff --git a/telegram/commands.go b/telegram/commands.go
index 64a5120..61e4882 100644
--- a/telegram/commands.go
+++ b/telegram/commands.go
@@ -1,8 +1,102 @@
 package telegram
 
+import (
+	"strings"
+)
+
 const notEnoughArguments string = "Not enough arguments"
 const telegramNotInitialized string = "Telegram connection is not initialized yet"
 
+var transportCommands = map[string]command{
+	"login": command{"phone", "sign in"},
+	//"logout":      command{"", "sign out"},
+	"code":     command{"", "check one-time code"},
+	"password": command{"", "check 2fa password"},
+	//"setusername": command{"", "update @username"},
+	//"setname":     command{"first last", "update name"},
+	//"setbio":      command{"", "update about"},
+	//"setpassword": command{"[old] [new]", "set or remove password"},
+	//"config":      command{"[param] [value]", "view or update configuration options"},
+}
+
+var chatCommands = map[string]command{
+	//"d":          command{"[n]", "delete your last message(s)"},
+	//"s":          command{"regex replace", "edit your last message"},
+	//"add":        command{"@username", "add @username to your chat list"},
+	//"join":       command{"https://t.me/invite_link", "join to chat via invite link"},
+	//"group":      command{"title", "create groupchat «title» with current user"},
+	//"supergroup": command{"title description", "create new supergroup «title» with «description»"},
+	//"channel":    command{"title description", "create new channel «title» with «description»"},
+	//"secret":     command{"", "create secretchat with current user"},
+	//"search":     command{"string [limit]", "search <string> in current chat"},
+	//"history":    command{"[limit]", "get last [limit] messages from current chat"},
+	//"block":      command{"", "blacklist current user"},
+	//"unblock":    command{"", "unblacklist current user"},
+	//"invite":     command{"id or @username", "add user to current chat"},
+	//"kick":       command{"id or @username", "remove user to current chat"},
+	//"ban":        command{"id or @username [hours]", "restrict @username from current chat for [hours] or forever"},
+	//"leave":      command{"", "leave current chat"},
+	//"close":      command{"", "close current secret chat"},
+	//"delete":     command{"", "delete current chat from chat list"},
+	//"members":    command{"[query]", "search members [by optional query] in current chat (requires admin rights)"},
+}
+
+var transportConfigurationOptions = map[string]configurationOption{
+	//"timezone": configurationOption{"00:00", "adjust timezone for Telegram user statuses"}
+}
+
+type command struct {
+	arguments   string
+	description string
+}
+type configurationOption command
+
+type helpType int
+
+const (
+	helpTypeTransport helpType = iota
+	helpTypeChat
+)
+
+func helpString(ht helpType) string {
+	var str strings.Builder
+	var commandMap map[string]command
+
+	switch ht {
+	case helpTypeTransport:
+		commandMap = transportCommands
+	case helpTypeChat:
+		commandMap = chatCommands
+	}
+
+	str.WriteString("Available commands:\n")
+	for name, command := range commandMap {
+		str.WriteString("/")
+		str.WriteString(name)
+		if command.arguments != "" {
+			str.WriteString(" ")
+			str.WriteString(command.arguments)
+		}
+		str.WriteString(" — ")
+		str.WriteString(command.description)
+		str.WriteString("\n")
+	}
+
+	if ht == helpTypeTransport {
+		str.WriteString("Configuration options\n")
+		for name, option := range transportConfigurationOptions {
+			str.WriteString(name)
+			str.WriteString(" ")
+			str.WriteString(option.arguments)
+			str.WriteString(" — ")
+			str.WriteString(option.description)
+			str.WriteString("\n")
+		}
+	}
+
+	return str.String()
+}
+
 // ProcessTransportCommand executes commands sent directly to the component
 func (c *Client) ProcessTransportCommand(cmd string, args []string) string {
 	switch cmd {
@@ -27,6 +121,8 @@ func (c *Client) ProcessTransportCommand(cmd string, args []string) string {
 		case "password":
 			c.authorizer.Password <- args[0]
 		}
+	case "help":
+		return helpString(helpTypeTransport)
 	}
 
 	return ""