added help command

src/service/telegram/index.ts

@@ -5,6 +5,7 @@ import { Response } from "express";
 import { InputMediaPhoto, Update } from "typegram";
 import loggerTgMiddleware from "../logger/tg";
 import { ExtraReplyMessage } from "telegraf/typings/telegram-types";
+import { Template } from "../template";
 
 // import SocksProxyAgent from 'socks-proxy-agent';
 
@@ -14,6 +15,9 @@ export class TelegramService {
   public readonly bot: Telegraf;
   public readonly webhook: WebhookConfig = {};
 
+  protected helpTemplate: Template<{}, {}> | undefined;
+  protected adminHelpTemplate: Template<{}, {}> | undefined;
+
   constructor(private props: TelegramConfig) {
     // const agent = (CONFIG.PROXY && new SocksProxyAgent(CONFIG.PROXY)) || null;
     const options: Partial<Telegraf.Options<any>> = {
@@ -29,6 +33,14 @@ export class TelegramService {
     this.bot = new Telegraf(props.key, options);
     this.bot.use(loggerTgMiddleware);
 
+    this.helpTemplate = props.templates?.help
+      ? new Template(props.templates?.help)
+      : undefined;
+
+    this.adminHelpTemplate = props.templates?.help_admin
+      ? new Template(props.templates?.help_admin)
+      : undefined;
+
     process.once("SIGINT", () => this.stop("SIGINT"));
     process.once("SIGTERM", () => this.stop("SIGTERM"));
   }
@@ -40,6 +52,18 @@ export class TelegramService {
    * Connects to telegram
    */
   public async start() {
+    if (!this.helpTemplate) {
+      console.warn(
+        "No help template specified, check templates.help in config"
+      );
+    }
+
+    if (!this.adminHelpTemplate) {
+      console.warn(
+        "No admin help template specified, check templates.help_admin in config"
+      );
+    }
+
     if (this.isWebhookEnabled) {
       await this.bot.telegram
         .deleteWebhook()
@@ -196,4 +220,16 @@ export class TelegramService {
         );
       }
     });
+
+  public getHelpMessage = (forOwner?: boolean) => {
+    const template = forOwner
+      ? this.adminHelpTemplate ?? this.helpTemplate
+      : this.helpTemplate;
+
+    if (!template) {
+      return;
+    }
+
+    return template?.theme({});
+  };
 }

src/service/telegram/types.ts

@@ -7,4 +7,8 @@ export interface TelegramConfig {
   key: string;
   owners?: string[];
   webhook: WebhookConfig;
+  templates?: {
+    help?: string;
+    help_admin?: string;
+  };
 }

src/service/template/index.ts

@@ -16,10 +16,10 @@ const removeFrontmatter = () => (tree) => {
 };
 
 export class Template<
-  F extends Record<string, any>,
-  V extends Record<string, any>
+  Fields extends Record<string, any>,
+  Values extends Record<string, any>
 > {
-  public fields: F = {} as F;
+  public fields: Fields = {} as Fields;
   public template: string = "";
 
   private readonly file: VFileCompatible = "";
@@ -44,7 +44,7 @@ export class Template<
 
       this.file = toVFile.readSync(path.join(__dirname, dir, filename));
       const result = processor.processSync(this.file);
-      this.fields = result.data as F;
+      this.fields = result.data as Fields;
     } catch (e) {
       throw new Error(`Template: ${e?.toString()}`);
     }
@@ -54,7 +54,7 @@ export class Template<
    * Themes the template with values, removes markdown from template.
    * NOTE: text, that we'll insert into template, won't be used here
    */
-  public theme = (values: V, markdown?: boolean) => {
+  public theme = (values: Values, markdown?: boolean) => {
     const processor = unified()
       .use(stringify)
       .use(frontmatter)