Yoctol · chentsulin · May 11, 2020 · May 11, 2020
diff --git a/examples/slack-update-and-delete/.env b/examples/slack-update-and-delete/.env
@@ -0,0 +1,2 @@
+SLACK_ACCESS_TOKEN=
+SLACK_SIGNING_SECRET=
diff --git a/examples/slack-update-and-delete/README.md b/examples/slack-update-and-delete/README.md
@@ -0,0 +1,51 @@
+# Slack Update and Delete
+
+## Install and Run
+
+Download this example or clone [bottender](https://github.com/Yoctol/bottender).
+
+```sh
+curl https://codeload.github.com/Yoctol/bottender/tar.gz/master | tar -xz --strip=2 bottender-master/examples/slack-update-and-delete
+cd slack-update-and-delete
+```
+
+Install dependencies:
+
+```sh
+npm install
+```
+
+You must fill `SLACK_ACCESS_TOKEN` and `SLACK_SIGNING_SECRET` in your `.env` file.
+
+If you are not familiar with Slack Bot, you may refer to Bottender's doc, [Slack Setup](https://bottender.js.org/docs/channel-slack-setup), to find detailed instructions.
+
+After that, you can run the bot with this npm script:
+
+```sh
+npm run dev
+```
+
+This command starts a server listening at `http://localhost:5000` for bot development.
+
+If you successfully start the server, you get a webhook URL in the format of `https://xxxxxxxx.ngrok.io/webhooks/slack` from your terminal.
+
+## Set Webhook
+
+To set the webhook, go to [Slack Developer Console](https://api.slack.com/apps) / [YourApp] / Event Subscriptions, and use the webhook URL you got from running `npm run dev` to edit Request URL for your bot.
+
+## Idea of This Example
+
+This example is a bot running on [Slack](https://slack.com/).
+
+This example contains the following topics:
+
+- update the message sent by bot
+- delete the message sent by bot
+
+For more information, check our [Slack guides](https://bottender.js.org/docs/en/channel-slack-sending-messages#updating-messages).
+
+## Related Examples
+
+- [slack-hello-world](../slack-hello-world)
+- [slack-interactive-message](../slack-interactive-message)
+- [slack-slash-command](../slack-slash-command)
diff --git a/examples/slack-update-and-delete/bottender.config.js b/examples/slack-update-and-delete/bottender.config.js
@@ -0,0 +1,10 @@
+module.exports = {
+  channels: {
+    slack: {
+      enabled: true,
+      path: '/webhooks/slack',
+      accessToken: process.env.SLACK_ACCESS_TOKEN,
+      signingSecret: process.env.SLACK_SIGNING_SECRET,
+    },
+  },
+};
diff --git a/examples/slack-update-and-delete/index.js b/examples/slack-update-and-delete/index.js
@@ -0,0 +1,24 @@
+module.exports = async function App(context) {
+  if (
+    context.event.rawEvent.subtype === 'message_changed' ||
+    context.event.rawEvent.subtype === 'message_deleted'
+  ) {
+    return;
+  }
+
+  const response = await context.chat.postMessage({
+    text: 'This is a normal message by chat.postMessage.',
+  });
+
+  const { ts, channel } = response;
+
+  await context.chat.update({
+    text: 'Message updated.',
+    ts,
+    channel,
+  });
+
+  await context.chat.delete({
+    ts,
+  });
+};
diff --git a/examples/slack-update-and-delete/package.json b/examples/slack-update-and-delete/package.json
@@ -0,0 +1,9 @@
+{
+  "scripts": {
+    "dev": "bottender dev",
+    "start": "bottender start"
+  },
+  "dependencies": {
+    "bottender": "latest"
+  }
+}