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New Message in Channel from Discord Bot API

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New Message in Channel from the Discord Bot API
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Getting Started

Trigger a workflow on New Message in Channel with Discord Bot API. When you configure and deploy the workflow, it will run on Pipedream's servers 24x7 for free.

  1. Configure the New Message in Channel trigger
    1. Connect your Discord Bot account
    2. Select a Guild
    3. Select one or more Channels
    4. Optional- Configure Emit messages as a single event
    5. Configure timer
  2. Add steps to connect to 800+ APIs using code and no-code building blocks
  3. Deploy the workflow
  4. Send a test event to validate your setup
  5. Turn on the trigger

Details

This is a pre-built, open source component from Pipedream's GitHub repo. The component is developed by Pipedream and the community, and verified and maintained by Pipedream.

To contribute an update to an existing component or create a new component, create a PR on GitHub. If you're new to Pipedream component development, you can start with quickstarts for trigger span and action development, and then review the component API reference.

New Message in Channel on Discord Bot
Description:Emit new event for each message posted to one or more channels
Version:0.0.5
Key:discord_bot-new-message-in-channel

Code

import maxBy from "lodash.maxby";
import common from "../common.mjs";

const { discord } = common.props;

export default {
  ...common,
  key: "discord_bot-new-message-in-channel",
  name: "New Message in Channel",
  description: "Emit new event for each message posted to one or more channels",
  type: "source",
  version: "0.0.5",
  dedupe: "unique", // Dedupe events based on the Discord message ID
  props: {
    ...common.props,
    db: "$.service.db",
    channels: {
      type: "string[]",
      label: "Channels",
      description: "The channels you'd like to watch for new messages",
      propDefinition: [
        discord,
        "channelId",
        ({ guildId }) => ({
          guildId,
        }),
      ],
    },
    emitEventsInBatch: {
      type: "boolean",
      label: "Emit messages as a single event",
      description:
        "If `true`, all messages are emitted as an array, within a single Pipedream event. Defaults to `false`, emitting each Discord message as its own event in Pipedream",
      optional: true,
      default: false,
    },
    timer: {
      type: "$.interface.timer",
      default: {
        intervalSeconds: 60 * 15,
      },
    },
  },
  async run({ $ }) {
    // We store a cursor to the last message ID
    let lastMessageIDs = this._getLastMessageIDs();

    // If this is our first time running this source,
    // get the last N messages, emit them, and checkpoint
    for (const channelId of this.channels) {
      let lastMessageID;
      let messages = [];

      if (!lastMessageID) {
        messages = await this.discord.getMessages({
          $,
          channelId,
          params: {
            limit: 100,
          },
        });

        lastMessageID = messages.length
          ? maxBy(messages, (message) => message.id).id
          : 1;

      } else {
        let newMessages = [];

        do {
          newMessages = await this.discord.getMessages({
            $,
            channelId,
            params: {
              after: lastMessageIDs[channelId],
            },
          });

          messages = messages.concat(newMessages);

          lastMessageID = newMessages.length
            ? maxBy(newMessages, (message) => message.id).id
            : lastMessageIDs[channelId];

        } while (newMessages.length);
      }

      // Set the new high water mark for the last message ID
      // for this channel
      lastMessageIDs[channelId] = lastMessageID;

      if (!messages.length) {
        console.log(`No new messages in channel ${channelId}`);
        return;
      }

      console.log(`${messages.length} new messages in channel ${channelId}`);

      // Batched emits do not take advantage of the built-in deduper
      if (this.emitEventsInBatch) {
        const suffixChar =
          messages.length > 1
            ? "s"
            : "";

        this.$emit(messages, {
          summary: `${messages.length} new message${suffixChar}`,
          id: lastMessageID,
        });

      } else {
        messages.forEach((message) => {
          this.$emit(message, {
            summary: message.content,
            id: message.id, // dedupes events based on this ID
          });
        });
      }
    }

    // Set the last message ID for the next run
    this._setLastMessageIDs(lastMessageIDs);
  },
};

Configuration

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI and CLI.
LabelPropTypeDescription
Discord BotdiscordappThis component uses the Discord Bot app.
GuildguildIdstringSelect a value from the drop down menu.
N/Adb$.service.dbThis component uses $.service.db to maintain state between component invocations.
Channelschannelsstring[]Select a value from the drop down menu.
Emit messages as a single eventemitEventsInBatchboolean

If true, all messages are emitted as an array, within a single Pipedream event. Defaults to false, emitting each Discord message as its own event in Pipedream

timer$.interface.timer

Authentication

Discord Bot uses API keys for authentication. When you connect your Discord Bot account, Pipedream securely stores the keys so you can easily authenticate to Discord Bot APIs in both code and no-code steps.

If you haven't created a Discord bot, see these instructions or watch this video. You'll need to add this bot to your server(s).

Once you've created your bot, you'll find the Bot token within the Bot section of your app.

About Discord Bot

Use this app to interact with the Discord API using a bot in your account