← Hacker News + Slack integrations

Send Message to a Public Channel with Slack API on New Stories by Keyword from Hacker News API

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Trigger workflow on
New Stories by Keyword from the Hacker News API
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Send Message to a Public Channel with the Slack API
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Getting Started

This integration creates a workflow with a Hacker News trigger and Slack action. When you configure and deploy the workflow, it will run on Pipedream's servers 24x7 for free.

  1. Select this integration
  2. Configure the New Stories by Keyword trigger
    1. Connect your Hacker News account
    2. Configure timer
    3. Optional- Configure Keyword
  3. Configure the Send Message to a Public Channel action
    1. Connect your Slack account
    2. Optional- Configure Send as User
    3. Optional- Configure Bot Username
    4. Optional- Configure Icon (emoji)
    5. Optional- Configure Icon (image URL)
    6. Optional- Configure Schedule message
    7. Optional- Configure Include link to workflow
    8. Optional- Configure Metadata Event Type
    9. Optional- Configure Metadata Event Payload
    10. Select a Channel
    11. Configure Text
    12. Optional- Configure Send text as Slack mrkdwn
  4. Deploy the workflow
  5. Send a test event to validate your setup
  6. Turn on the trigger

Details

This integration uses pre-built, open source components from Pipedream's GitHub repo. These components are 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.

Trigger

Description:Emit new stories that mention a specific keyword
Version:0.0.4
Key:hacker_news-new-stories-by-keyword

Trigger Code

const Parser = require("rss-parser");
const hacker_news = require("../../hacker_news.app.js");
const { DEFAULT_POLLING_SOURCE_TIMER_INTERVAL } = require("@pipedream/platform");

const parser = new Parser();

module.exports = {
  key: "hacker_news-new-stories-by-keyword",
  name: "New Stories by Keyword",
  description: "Emit new stories that mention a specific keyword",
  version: "0.0.4",
  type: "source",
  props: {
    hacker_news,
    timer: {
      type: "$.interface.timer",
      default: {
        intervalSeconds: DEFAULT_POLLING_SOURCE_TIMER_INTERVAL,
      },
    },
    db: "$.service.db",
    // If you want a single search feed but multiple keywords, separate the keywords with " OR ":
    keyword: {
      type: "string",
      label: "Keyword",
      description: "Keyword to watch. Matches story titles. Leave blank to get all stories.",
      optional: true,
      default: "",
    },
  },
  methods: {
    // in theory if alternate setting title and description or aren't unique this won't work
    itemKey(item) {
      return item.guid || item.id || item.title || item.description;
    },
  },
  async run() {
    const seenKeys = this.db.get("seenKeys") || [];
    const seenKeysMap = seenKeys.reduce((acc, v) => {
      acc[v] = true;
      return acc;
    }, {});
    // All elements of an item are optional,
    // however at least one of title or description must be present.
    // should be listed from most recent to least recent
    const feed = await parser.parseURL(`https://hnrss.org/newest?q=${encodeURIComponent(this.keyword)}`);
    for (let idx = feed.items.length - 1; idx >= 0; idx--) {
      const item = feed.items[idx];
      const key = this.itemKey(item);
      // XXX throw if !key?
      if (seenKeysMap[key]) continue;
      seenKeys.unshift(key);
      seenKeysMap[key] = true; // just in case of dupes
      this.$emit(item, {
        id: this.itemKey(item),
        summary: item.title,
        ts: item.pubdate && +new Date(item.pubdate),
      });
    }
    if (seenKeys.length) {
      // XXX restrict by byte size instead of el size
      this.db.set("seenKeys", seenKeys.slice(0, 1000));
    }
  },
};

Trigger 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
Hacker Newshacker_newsappThis component uses the Hacker News app.
timer$.interface.timer
N/Adb$.service.dbThis component uses $.service.db to maintain state between component invocations.
Keywordkeywordstring

Keyword to watch. Matches story titles. Leave blank to get all stories.

Trigger Authentication

The Hacker News API does not require authentication.

About Hacker News

Social news website

Action

Description:Send a message to a public channel and customize the name and avatar of the bot that posts the message. See [postMessage](https://api.slack.com/methods/chat.postMessage) or [scheduleMessage](https://api.slack.com/methods/chat.scheduleMessage) docs here
Version:0.2.10
Key:slack-send-message-public-channel

Slack Overview

With the Slack API, you can build all sorts of integrations and applications to
make your work life easier. Here are just a few examples:

  • Automate posting updates to your team channel
  • Create a bot to answer common questions
  • Integrate with your existing tools and services
  • Build a custom dashboard to track your team's progress
  • Create a bot to handle scheduling and meeting requests
  • And much more!

Action Code

import common from "../common/send-message.mjs";

export default {
  ...common,
  key: "slack-send-message-public-channel",
  name: "Send Message to a Public Channel",
  description: "Send a message to a public channel and customize the name and avatar of the bot that posts the message. See [postMessage](https://api.slack.com/methods/chat.postMessage) or [scheduleMessage](https://api.slack.com/methods/chat.scheduleMessage) docs here",
  version: "0.2.10",
  type: "action",
  props: {
    ...common.props,
    conversation: {
      propDefinition: [
        common.props.slack,
        "publicChannel",
      ],
    },
    text: {
      propDefinition: [
        common.props.slack,
        "text",
      ],
    },
    mrkdwn: {
      propDefinition: [
        common.props.slack,
        "mrkdwn",
      ],
    },
    username: {
      propDefinition: [
        common.props.slack,
        "username",
      ],
      description: "Optionally customize your bot's username (default is `Pipedream`).",
    },
    icon_emoji: {
      propDefinition: [
        common.props.slack,
        "icon_emoji",
      ],
      description: "Optionally use an emoji as the bot icon for this message (e.g., `:fire:`). This value overrides `icon_url` if both are provided.",
    },
    icon_url: {
      propDefinition: [
        common.props.slack,
        "icon_url",
      ],
      description: "Optionally provide an image URL to use as the bot icon for this message.",
    },
  },
};

Action Configuration

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI.

LabelPropTypeDescription
SlackslackappThis component uses the Slack app.
Send as Useras_userboolean

Optionally pass TRUE to post the message as the authed user, instead of as a bot. Defaults to FALSE.

Bot Usernameusernamestring

Optionally customize your bot's username (default is Pipedream).

Icon (emoji)icon_emojistring

Optionally use an emoji as the bot icon for this message (e.g., :fire:). This value overrides icon_url if both are provided.

Icon (image URL)icon_urlstring

Optionally provide an image URL to use as the bot icon for this message.

Schedule messagepost_atinteger

Messages can only be scheduled up to 120 days in advance, and cannot be scheduled for the past. The datetime format should be a unix timestamp (e.g., 1650507616, see here for help with this format).

Include link to workflowinclude_sent_via_pipedream_flagboolean

Defaults to true, includes a link to the workflow at the end of your Slack message.

Metadata Event Typemetadata_event_typestring

The name of the metadata event

Metadata Event Payloadmetadata_event_payloadstring

The payload of the metadata event. Must be a JSON string e.g. {"key": "value"}

ChannelconversationstringSelect a value from the drop down menu.
Texttextstring

Text of the message to send (see Slack's formatting docs). This field is usually necessary, unless you're providing only attachments instead.

Send text as Slack mrkdwnmrkdwnboolean

TRUE by default. Pass FALSE to disable Slack markup parsing. See docs here

Action Authentication

Slack uses OAuth authentication. When you connect your Slack account, Pipedream will open a popup window where you can sign into Slack and grant Pipedream permission to connect to your account. Pipedream securely stores and automatically refreshes the OAuth tokens so you can easily authenticate any Slack API.

Pipedream requests the following authorization scopes when you connect your account:

bookmarks:writecalls:readcalls:writechannels:historychannels:readchannels:writednd:readdnd:writeemoji:readfiles:readgroups:historygroups:readgroups:writeim:historyim:readim:writelinks:readlinks:writempim:historympim:readmpim:writepins:readpins:writereactions:readreactions:writereminders:readreminders:writeremote_files:readremote_files:sharestars:readstars:writeteam:readusergroups:readusergroups:writeusers:readusers:read.emailusers:writechat:write:botchat:write:usercommandsfiles:write:userusers.profile:writeusers.profile:readsearch:read

About Slack

Slack is a channel-based messaging platform. With Slack, people can work together more effectively, connect all their software tools and services, and find the information they need to do their best work — all within a secure, enterprise-grade environment.

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