#6 added joiin-leave handler

config.example.yml

@@ -17,6 +17,8 @@ vk:
 templates:
   message_new: templates/message_new.md
   wall_post_new: templates/post_new.md
+  group_join: templates/group_join.md
+  group_leave: templates/group_leave.md
 #  groups:
 #    - id: 0
 #      name: 'Group name'

src/service/telegram/index.ts

@@ -101,7 +101,7 @@ export class TelegramService {
    * @param signal
    */
   public stop = (signal: string) => {
-    if (!this.isWebhookEnabled) {
+    if (this.isWebhookEnabled) {
       return;
     }
 

src/service/vk/handlers/JoinLeaveHandler.ts

@@ -0,0 +1,61 @@
+import { VkEventHandler } from "./VkEventHandler";
+import { GroupMemberContext } from "vk-io";
+import { NextMiddleware } from "middleware-io";
+import logger from "../../logger";
+import { UsersUserFull } from "vk-io/lib/api/schemas/objects";
+import { ConfigGroup } from "../types";
+import { ExtraReplyMessage } from "telegraf/typings/telegram-types";
+
+interface Fields {}
+
+interface Values {
+  user: UsersUserFull;
+  group: ConfigGroup;
+  isJoined: boolean;
+  isLeave: boolean;
+  count: number;
+}
+
+export class JoinLeaveHandler extends VkEventHandler<Fields, Values> {
+  public execute = async (
+    context: GroupMemberContext,
+    next: NextMiddleware
+  ) => {
+    const user = await this.getUserByID(String(context.userId));
+    const dir = context.isJoin ? "joined" : "left";
+    const count = await this.getMembersCount();
+
+    logger.debug(
+      `vk, group ${this.group.name}: ${user.first_name} ${user.last_name} ${dir} the group`
+    );
+
+    const parsed = this.template.theme({
+      user,
+      group: this.group,
+      isJoined: context.isJoin,
+      isLeave: context.isLeave,
+      count,
+    });
+
+    const extras: ExtraReplyMessage = {
+      parse_mode: "Markdown",
+      disable_web_page_preview: true,
+    };
+
+    await this.telegram.sendMessageToChan(this.channel.id, parsed, extras);
+
+    await next();
+  };
+
+  /**
+   * Returns current members count
+   * @private
+   */
+  private getMembersCount = async () => {
+    const resp = await this.instance.api.groups.getMembers({
+      group_id: this.group.id.toString(),
+    });
+
+    return resp.count;
+  };
+}

src/service/vk/handlers/MessageNewHandler.ts

@@ -42,6 +42,7 @@ export class MessageNewHandler extends VkEventHandler<Fields, Values> {
 
     const extras: ExtraReplyMessage = {
       parse_mode: "Markdown",
+      disable_web_page_preview: true,
     };
 
     this.appendButtons(extras, user.id);

src/service/vk/handlers/index.ts

@@ -7,6 +7,7 @@ import { TelegramService } from "../../telegram";
 import { Template } from "../../template";
 import { PostNewHandler } from "./PostNewHandler";
 import { Storage } from "../../db";
+import { JoinLeaveHandler } from "./JoinLeaveHandler";
 
 interface Handler {
   new (
@@ -22,8 +23,8 @@ interface Handler {
 }
 
 export const vkEventToHandler: Record<VkEvent, Handler> = {
-  [VkEvent.GroupJoin]: StubHandler,
+  [VkEvent.GroupJoin]: JoinLeaveHandler,
-  [VkEvent.GroupLeave]: StubHandler,
+  [VkEvent.GroupLeave]: JoinLeaveHandler,
   [VkEvent.MessageNew]: MessageNewHandler,
   [VkEvent.WallPostNew]: PostNewHandler,
 };

templates/group_join.md

@@ -0,0 +1,9 @@
+---
+---
+{{!-- 
+    use handlebars template here
+    available variables are: user, group, text, isJoined, isLeave, count
+    (see JoinLeaveHandler) 
+--}}
+😃 [{{user.first_name}} {{user.last_name}}](https://vk.com/id{{user.id}}) {{#ifEq user.sex 1}}присоединилась{{else}}присоединился{{/ifEq}} 
+ к группе. Участники: {{count}}. 

templates/group_leave.md

@@ -0,0 +1,9 @@
+---
+---
+{{!-- 
+    use handlebars template here
+    available variables are: user, group, text, isJoined, isLeave, count
+    (see JoinLeaveHandler) 
+--}}
+😡 [{{user.first_name}} {{user.last_name}}](https://vk.com/id{{user.id}}) {{#ifEq user.sex 1}}свалила{{else}}свалил{{/ifEq}} 
+ из группы. Участники: {{count}}.