From b35b5d37319eab92b58a32dcbd15b1cf6d5e964b Mon Sep 17 00:00:00 2001
From: Fedor Katurov <gotham48@gmail.com>
Date: Thu, 29 Apr 2021 11:12:17 +0700
Subject: [PATCH] #1 added buttons to MessageNewHandler.ts

---
 src/service/template/index.ts                | 16 ++++++-
 src/service/vk/handlers/MessageNewHandler.ts | 44 ++++++++++++++++----
 src/service/vk/handlers/VkEventHandler.ts    | 19 +++++++++
 templates/message_new.md                     |  6 ++-
 4 files changed, 73 insertions(+), 12 deletions(-)

diff --git a/src/service/template/index.ts b/src/service/template/index.ts
index 312128c..5577fc4 100644
--- a/src/service/template/index.ts
+++ b/src/service/template/index.ts
@@ -40,7 +40,21 @@ export class Template<
     }
   }
 
-  theme = (values: V) => {
+  /**
+   * Themes the tempalte with values
+   */
+  public theme = (values: V) => {
     return hb.compile(this.template)(values);
   };
+
+  /**
+   * Registers handlebars helpers
+   */
+  public static registerHelpers() {
+    hb.registerHelper("ifEq", function (arg1, arg2, options) {
+      return arg1 == arg2 ? options.fn(this) : options.inverse(this);
+    });
+  }
 }
+
+Template.registerHelpers();
diff --git a/src/service/vk/handlers/MessageNewHandler.ts b/src/service/vk/handlers/MessageNewHandler.ts
index 43d2143..e3debae 100644
--- a/src/service/vk/handlers/MessageNewHandler.ts
+++ b/src/service/vk/handlers/MessageNewHandler.ts
@@ -4,13 +4,17 @@ import { NextMiddleware } from "middleware-io";
 import logger from "../../logger";
 import { ContextDefaultState } from "vk-io/lib/structures/contexts/context";
 import { UsersUserFull } from "vk-io/lib/api/schemas/objects";
+import { ConfigGroup } from "../types";
+import { ExtraReplyMessage } from "telegraf/typings/telegram-types";
 
 interface Fields {
-  buttons: string[];
+  buttons?: string[];
+  link_text?: string;
 }
 
 interface Values {
   user: UsersUserFull;
+  group: ConfigGroup;
   text: string;
 }
 
@@ -24,22 +28,44 @@ export class MessageNewHandler extends VkEventHandler<Fields, Values> {
       return;
     }
 
-    const users = await this.instance.api.users.get({
-      user_ids: [String(context.senderId)],
-    });
-    const from = users[0];
+    const user = await this.getUserByID(String(context.senderId));
 
-    logger.debug(
-      `received message from ${from.first_name} ${from.last_name}: ${context.text}`
+    logger.info(
+      `received message from ${user.first_name} ${user.last_name}: ${context.text}`
     );
 
     const parsed = this.template.theme({
-      user: from,
+      user,
+      group: this.group,
       text: context.text,
     });
 
-    await this.telegram.sendMessageToChan(this.channel, parsed).catch(next);
+    const extras: ExtraReplyMessage = {
+      parse_mode: "Markdown",
+    };
+
+    this.appendButtons(extras, user.id);
+
+    await this.telegram
+      .sendMessageToChan(this.channel, parsed, extras)
+      .catch(next);
 
     await next();
   };
+
+  /**
+   * Appending buttons (if needed) by mutating original extras
+   */
+  private appendButtons = (extras: ExtraReplyMessage, userId: number) => {
+    if (!this.template?.fields?.buttons?.includes("link")) {
+      return;
+    }
+
+    const text = this.template?.fields?.link_text || "View dialog";
+    const url = this.makeDialogUrl(this.group.id, userId);
+
+    extras.reply_markup = {
+      inline_keyboard: [[{ text, url }]],
+    };
+  };
 }
diff --git a/src/service/vk/handlers/VkEventHandler.ts b/src/service/vk/handlers/VkEventHandler.ts
index 35d0df0..db30c47 100644
--- a/src/service/vk/handlers/VkEventHandler.ts
+++ b/src/service/vk/handlers/VkEventHandler.ts
@@ -25,4 +25,23 @@ export class VkEventHandler<
     console.log(`vk received unknown event`, ctx);
     await next();
   };
+
+  /**
+   * Fetches user by id
+   * @param id
+   */
+  protected getUserByID = async (id: string) => {
+    const users = await this.instance.api.users.get({
+      user_ids: [id],
+      fields: ["sex"],
+    });
+
+    return users[0];
+  };
+
+  /**
+   * Returns url for group dialog
+   */
+  protected makeDialogUrl = (groupId: number, userId: number): string =>
+    `https://vk.com/gim${groupId}?sel=${userId}`;
 }
diff --git a/templates/message_new.md b/templates/message_new.md
index 9f6fead..836d15d 100644
--- a/templates/message_new.md
+++ b/templates/message_new.md
@@ -1,9 +1,11 @@
 ---
     buttons: [link]
+    link_text: Посмотреть сообщение
 ---
 {{!-- 
     use handlebars template here
-    available variables are: user, text
+    available variables are: user, group, text
     (see MessageNewHandler) 
 --}}
-{{user.first_name}} {{user.last_name}} пишет: {{text}}
+***Новое сообщение:***
+[{{user.first_name}} {{user.last_name}}](https://vk.com/id{{user.id}}) {{#ifEq user.sex 1}}написала{{else}}написал{{/ifEq}}: {{text}}