← Hacker News + Formatting integrations

[Date/Time] Add/Subtract Time with Formatting API on New Stories by Keyword from Hacker News API

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New Stories by Keyword from the Hacker News API
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[Date/Time] Add/Subtract Time with the Formatting API
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Getting Started

This integration creates a workflow with a Hacker News trigger and Formatting 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 [Date/Time] Add/Subtract Time action
    1. Connect your Formatting account
    2. Configure Input Date
    3. Optional- Select a Input Format
    4. Select a Operation
    5. Configure Duration
    6. Optional- Select a Output Format
  4. Deploy the workflow
  5. Send a test event to validate your setup
  6. Turn on the trigger

Details

This integration uses pre-built, source-available 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 executions.
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:Add or subtract time from a given input
Version:0.0.4
Key:formatting-add-subtract-time

Action Code

import { defineAction } from "@pipedream/types";
import { ConfigurationError } from "@pipedream/platform";
import app from "../../app/formatting.app.mjs";
import commonDateTime from "../../common/date-time/commonDateTime.mjs";
import { DATE_FORMAT_PARSE_MAP, DEFAULT_FORMAT_VALUE, } from "../../common/date-time/dateFormats.mjs";
import { DATE_TIME_UNITS } from "../../common/date-time/dateTimeUnits.mjs";
const OPERATION_OPTIONS = {
    ADD: "Add",
    SUBTRACT: "Subtract",
};
export default defineAction({
    ...commonDateTime,
    name: "[Date/Time] Add/Subtract Time",
    description: "Add or subtract time from a given input",
    key: "formatting-add-subtract-time",
    version: "0.0.4",
    type: "action",
    props: {
        ...commonDateTime.props,
        operation: {
            label: "Operation",
            description: "Whether to add or subtract time.",
            type: "string",
            options: Object.values(OPERATION_OPTIONS),
        },
        duration: {
            label: "Duration",
            description: "The duration for the operation. You can use the shorthand duration, for example: `1s`, `1m`, `1h`, `1d`, `1w`, `1y` equal one second, minute, hour, day, week, and year respectively",
            type: "string",
        },
        outputFormat: {
            propDefinition: [
                app,
                "outputFormat",
            ],
        },
    },
    methods: {
        ...commonDateTime.methods,
        getOperationMilliseconds(str) {
            let result = 0;
            const { second, minute, hour, day, week, year, } = DATE_TIME_UNITS;
            Object.entries({
                s: second,
                m: minute,
                h: hour,
                d: day,
                w: week,
                y: year,
            }).forEach(([identifier, multiplier,]) => {
                const substr = str.match(new RegExp(`[0-9]+\\s*${identifier}`))?.[0];
                if (substr) {
                    const value = Number(substr.match(/[0-9]+/));
                    result += value * multiplier;
                }
            });
            return result;
        },
    },
    async run({ $ }) {
        const { operation, duration, outputFormat, } = this;
        const dateObj = this.getDateFromInput();
        const value = dateObj.valueOf();
        let amount = this.getOperationMilliseconds(duration);
        if (operation === OPERATION_OPTIONS.SUBTRACT)
            amount *= -1;
        const result = value + amount;
        const format = outputFormat ?? this.inputFormat ?? DEFAULT_FORMAT_VALUE;
        try {
            const { outputFn } = DATE_FORMAT_PARSE_MAP.get(format);
            const output = outputFn(new Date(result));
            $.export("$summary", `Successfully ${operation === OPERATION_OPTIONS.SUBTRACT
                ? "subtracted"
                : "added"} time`);
            return output;
        }
        catch (err) {
            throw new ConfigurationError("**Parse error** - check your input and if the selected format is correct.");
        }
    },
});

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
FormattingappappThis component uses the Formatting app.
Input DateinputDatestring

A valid date string, in the format selected in Input Format. If the format is not set, Pipedream will attempt to infer it from the input. If the input is an integer, it will be treated as a unix timestamp in seconds.

Input FormatinputFormatstringSelect a value from the drop down menu:{ "label": "Sun Jan 22 23:04:05 -0000 2006", "value": "ddd MMM DD HH:mm:ss Z YYYY" }{ "label": "January 22 2006 23:04:05", "value": "MMMM DD YYYY HH:mm:ss" }{ "label": "January 22 2006", "value": "MMMM DD YYYY" }{ "label": "Jan 22 2006", "value": "MMM DD YYYY" }{ "label": "2006-01-22T23:04:05", "value": "YYYY-MM-DDTHH:mm:ss" }{ "label": "2006-01-22T23:04:05-0000", "value": "YYYY-MM-DDTHH:mm:ss" }{ "label": "2006-01-22 23:04:05 -0000", "value": "YYYY-MM-DD HH:mm:ss Z" }{ "label": "2006-01-22 23:04", "value": "YYYY-MM-DD HH:mm" }{ "label": "2006-01-22", "value": "YYYY-MM-DD" }{ "label": "01-22-2006", "value": "MM-DD-YYYY" }{ "label": "01/22/2006", "value": "MM/DD/YYYY" }{ "label": "01/22/06", "value": "MM/DD/YY" }{ "label": "22-01-2006", "value": "DD-MM-YYYY" }{ "label": "22/01/2006", "value": "DD/MM/YYYY" }{ "label": "22/01/06", "value": "DD/MM/YY" }{ "label": "1137971045", "value": "Unix time (seconds)" }{ "label": "1137971045000", "value": "Unix time (milliseconds)" }
OperationoperationstringSelect a value from the drop down menu:AddSubtract
Durationdurationstring

The duration for the operation. You can use the shorthand duration, for example: 1s, 1m, 1h, 1d, 1w, 1y equal one second, minute, hour, day, week, and year respectively

Output FormatoutputFormatstringSelect a value from the drop down menu:{ "label": "Sun Jan 22 23:04:05 -0000 2006", "value": "ddd MMM DD HH:mm:ss Z YYYY" }{ "label": "January 22 2006 23:04:05", "value": "MMMM DD YYYY HH:mm:ss" }{ "label": "January 22 2006", "value": "MMMM DD YYYY" }{ "label": "Jan 22 2006", "value": "MMM DD YYYY" }{ "label": "2006-01-22T23:04:05", "value": "YYYY-MM-DDTHH:mm:ss" }{ "label": "2006-01-22T23:04:05-0000", "value": "YYYY-MM-DDTHH:mm:ss" }{ "label": "2006-01-22 23:04:05 -0000", "value": "YYYY-MM-DD HH:mm:ss Z" }{ "label": "2006-01-22 23:04", "value": "YYYY-MM-DD HH:mm" }{ "label": "2006-01-22", "value": "YYYY-MM-DD" }{ "label": "01-22-2006", "value": "MM-DD-YYYY" }{ "label": "01/22/2006", "value": "MM/DD/YYYY" }{ "label": "01/22/06", "value": "MM/DD/YY" }{ "label": "22-01-2006", "value": "DD-MM-YYYY" }{ "label": "22/01/2006", "value": "DD/MM/YYYY" }{ "label": "22/01/06", "value": "DD/MM/YY" }{ "label": "1137971045", "value": "Unix time (seconds)" }{ "label": "1137971045000", "value": "Unix time (milliseconds)" }

Action Authentication

The Formatting API does not require authentication.

About Formatting

Pre-built actions to make formatting and manipulating data within your workflows easier.

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