Scheduling messages

import com.slack.api.bolt.App;
import com.slack.api.bolt.AppConfig;
import com.slack.api.bolt.jetty.SlackAppServer;
import com.slack.api.methods.SlackApiException;

import java.io.IOException;
import java.time.ZonedDateTime;
import java.time.temporal.ChronoUnit;

public class ChatScheduleMessage {

    public static void main(String[] args) throws Exception {
        var config = new AppConfig();
        config.setSingleTeamBotToken(System.getenv("SLACK_BOT_TOKEN"));
        config.setSigningSecret(System.getenv("SLACK_SIGNING_SECRET"));
        var app = new App(config); // `new App()` does the same

        app.command("/schedule", (req, ctx) -> {
            var logger = ctx.logger;
            var tomorrow = ZonedDateTime.now().truncatedTo(ChronoUnit.DAYS).plusDays(1).withHour(9);
            try {
                var payload = req.getPayload();
                // Call the chat.scheduleMessage method using the built-in WebClient
                var result = ctx.client().chatScheduleMessage(r -> r
                    // The token you used to initialize your app
                    .token(ctx.getBotToken())
                    .channel(payload.getChannelId())
                    .text(payload.getText())
                    // Time to post message, in Unix Epoch timestamp format
                    .postAt((int) tomorrow.toInstant().getEpochSecond())
                );
                // Print result
                logger.info("result: {}", result);
            } catch (IOException | SlackApiException e) {
                logger.error("error: {}", e.getMessage(), e);
            }
            // Acknowledge incoming command event
            return ctx.ack();
        });

        var server = new SlackAppServer(app);
        server.start();
    }

}

Hide code to initialize app
// Require the Node Slack SDK package (github.com/slackapi/node-slack-sdk)
const { WebClient, LogLevel } = require("@slack/web-api");

// WebClient insantiates a client that can call API methods
// When using Bolt, you can use either `app.client` or the `client` passed to listeners.
const client = new WebClient("xoxb-your-token", {
  // LogLevel can be imported and used to make debugging simpler
  logLevel: LogLevel.DEBUG
});
Show code to initialize app
// Unix timestamp for tomorrow morning at 9AM
const tomorrow = new Date();
tomorrow.setDate(tomorrow.getDate() + 1);
tomorrow.setHours(9, 0, 0);

// Channel you want to post the message to
const channelId = "C12345";

try {
  // Call the chat.scheduleMessage method using the WebClient
  const result = await client.chat.scheduleMessage({
    channel: channelId,
    text: "Looking towards the future",
    // Time to post message, in Unix Epoch timestamp format
    post_at: tomorrow.getTime() / 1000
  });

  console.log(result);
}
catch (error) {
  console.error(error);
}

Hide code to initialize app
import datetime
import os
# Import WebClient from Python SDK (github.com/slackapi/python-slack-sdk)
from slack_sdk import WebClient
from slack_sdk.errors import SlackApiError

# WebClient insantiates a client that can call API methods
# When using Bolt, you can use either `app.client` or the `client` passed to listeners.
client = WebClient(token=os.environ.get("SLACK_BOT_TOKEN"))
Show code to initialize app
# Create a timestamp for tomorrow at 9AM
tomorrow = datetime.date.today() + datetime.timedelta(days=1)
scheduled_time = datetime.time(hour=9, minute=30)
schedule_timestamp = datetime.datetime.combine(tomorrow, scheduled_time).strftime('%s')

# Channel you want to post message to
channel_id = "C12345"

try:
    # Call the chat.scheduleMessage method using the WebClient
    result = client.chat_scheduleMessage(
        channel=channel_id,
        text="Looking towards the future",
        post_at=schedule_timestamp
    )
    # Log the result
    logger.info(result)

except SlackApiError as e:
    logger.error("Error scheduling message: {}".format(e))

POST https://slack.com/api/chat.scheduleMessage
Content-type: application/json
Authorization: Bearer xoxb-your-token
{
  "channel": "YOUR_CHANNEL_ID",
  "text": "Hey, team. Don't forget about breakfast catered by John Hughes Bistro today.",
  "post_at": 1551891428,
}

import com.slack.api.Slack;
import com.slack.api.methods.SlackApiException;
import org.slf4j.LoggerFactory;

import java.io.IOException;

public class ChatScheduledMessagesList {

    /**
     * Lists scheduled messages using latest and oldest timestamps
     */
    static void listScheduledMessages(String latest, String oldest) {
        // you can get this instance via ctx.client() in a Bolt app
        var client = Slack.getInstance().methods();
        var logger = LoggerFactory.getLogger("my-awesome-slack-app");
        try {
            // Call the chat.scheduledMessages.list method using the built-in WebClient
            var result = client.chatScheduledMessagesList(r -> r
                // The token you used to initialize your app
                .token(System.getenv("SLACK_BOT_TOKEN"))
                .latest(latest)
                .oldest(oldest)
            );
            // Print scheduled messages
            for (var message : result.getScheduledMessages()) {
                logger.info("message: {}", message);
            }
            // Print result
            logger.info("result: {}", result);
        } catch (IOException | SlackApiException e) {
            logger.error("error: {}", e.getMessage(), e);
        }
    }

    public static void main(String[] args) throws Exception {
        listScheduledMessages("1551991429", "1551991427");
    }

}

Hide code to initialize app
// Require the Node Slack SDK package (github.com/slackapi/node-slack-sdk)
const { WebClient, LogLevel } = require("@slack/web-api");

// WebClient insantiates a client that can call API methods
// When using Bolt, you can use either `app.client` or the `client` passed to listeners.
const client = new WebClient("xoxb-your-token", {
  // LogLevel can be imported and used to make debugging simpler
  logLevel: LogLevel.DEBUG
});
Show code to initialize app
// List scheduled messages using latest and oldest timestamps
async function listScheduledMessages(latest, oldest) {
  try {
    // Call the chat.scheduledMessages.list method using the WebClient
    const result = await client.chat.scheduledMessages.list({
      latest: latest,
      oldest: oldest
    });

    // Print scheduled messages
    for (const message of result.scheduled_messages) {
      console.log(message);
    }
  }
  catch (error) {
    console.error(error);
  }
}

listScheduledMessages("1551991429", "2661991427");

Hide code to initialize app
import os
import logging
from slack_sdk.errors import SlackApiError
from slack_sdk.web import WebClient

client = WebClient(token=os.environ["SLACK_BOT_TOKEN"])
logger = logging.getLogger(__name__)

Show code to initialize app
# List scheduled messages using latest and oldest timestamps
def list_scheduled_messages(latest, oldest):
    try:
        # Call the chat.scheduledMessages.list method using the WebClient
        result = client.chat_scheduledMessages_list(
            latest=latest, 
            oldest=oldest
        )

        # Print scheduled messages
        for message in result["scheduled_messages"]:
            logger.info(message)

    except SlackApiError as e:
        logger.error("Error creating conversation: {}".format(e))


list_scheduled_messages("1551991429", "2661991427")

POST https://slack.com/api/chat.scheduledMessages.list
Content-type: application/json
Authorization: Bearer xoxb-your-token
{
    "channel": "YOUR_CHANNEL_ID",
    "latest": 1551991429,
    "oldest": 1551991427,
}

import com.slack.api.Slack;
import com.slack.api.methods.SlackApiException;
import org.slf4j.LoggerFactory;

import java.io.IOException;

public class ChatDeleteScheduledMessage {

    /**
     * Deletes scheduled message using channel ID and scheduled message ID
     */
    static void deleteScheduledMessage(String channel, String id) {
        // you can get this instance via ctx.client() in a Bolt app
        var client = Slack.getInstance().methods();
        var logger = LoggerFactory.getLogger("my-awesome-slack-app");
        try {
            var result = client.chatDeleteScheduledMessage(r -> r
                // The token you used to initialize your app
                .token(System.getenv("SLACK_BOT_TOKEN"))
                .channel(channel)
                .scheduledMessageId(id)
            );
            // Print result
            logger.info("result: {}", result);
        } catch (IOException | SlackApiException e) {
            logger.error("error: {}", e.getMessage(), e);
        }
    }

    public static void main(String[] args) throws Exception {
        deleteScheduledMessage("C12345", "Q123ABC95");
    }

}

Hide code to initialize app
// Require the Node Slack SDK package (github.com/slackapi/node-slack-sdk)
const { WebClient, LogLevel } = require("@slack/web-api");

// WebClient insantiates a client that can call API methods
// When using Bolt, you can use either `app.client` or the `client` passed to listeners.
const client = new WebClient("xoxb-your-token", {
  // LogLevel can be imported and used to make debugging simpler
  logLevel: LogLevel.DEBUG
});
Show code to initialize app
// The ts of the message you want to delete
const messageId = "U12345";
// ID of channel that the scheduled message was sent to
const channelId = "C12345";

try {
  // Call the chat.deleteScheduledMessage method using the WebClient
  const result = await client.chat.deleteScheduledMessage({
    channel: channelId,
    scheduled_message_id: messageId
  });

  console.log(result);
}
catch (error) {
  console.error(error);
}

Hide code to initialize app
import os
# Import WebClient from Python SDK (github.com/slackapi/python-slack-sdk)
from slack_sdk import WebClient
from slack_sdk.errors import SlackApiError

# WebClient insantiates a client that can call API methods
# When using Bolt, you can use either `app.client` or the `client` passed to listeners.
client = WebClient(token=os.environ.get("SLACK_BOT_TOKEN"))
Show code to initialize app
# The ts of the message you want to delete
message_id = "U12345"
# ID of channel that the scheduled message was sent to
channel_id = "C12345"

try:
    # Call the chat.deleteScheduledMessage method using the built-in WebClient
    result = client.chat_deleteScheduledMessage(
        channel=channel,
        scheduled_message_id=message_id
    )
    # Log the result
    logger.info(result)

except SlackApiError as e:
    logger.error(f"Error deleting scheduled message: {e}")

POST https://slack.com/api/chat.deleteScheduledMessage
Content-type: application/json
Authorization: Bearer xoxb-your-token
{
    "channel": "YOUR_CHANNEL_ID",
    "scheduled_message_id": "YOUR_SCHEDULED_MESSAGE_ID"
}