@hypericon/node-red-hypertable/nodes/read-collection.js

Node-RED plugin to interact with Hypertable

const axios = require("axios").default;

// https://nodered.org/docs/creating-nodes/node-js

const nodeInit = (RED) => {

  function readCollectionNode(config) {
    RED.nodes.createNode(this, config);

    

    // Retrieve the connection config node
    this.connection = RED.nodes.getNode(config.connection);
    // this.log("Connection: " + JSON.stringify(this.connection, null, 2));

    // Called whenever a message arrives at the node
    this.on('input', async (msg, send, done) => {

      /** @type string */
      const collectionId = msg.collectionId || config.collectionId;
      if (!collectionId) return done(new Error("No collection ID is specified"));

      // Ensure the connection is defined
      if (!this.connection) return done(new Error("No Hypertable connection is defined"));

      /** @type string */
      let baseUrl = this.connection.baseUrl;
      if (!baseUrl) return done(new Error("No base URL is specified in the connection"));
      baseUrl = baseUrl.endsWith("/") ? baseUrl : baseUrl + "/";

      /** @type string */
      const projectId = this.connection.projectId;
      if (!baseUrl) return done(new Error("No project ID is specified in the connection"));

      /** @type string */
      const apiKey = this.connection.apiKey;
      if (!apiKey) return done(new Error("No API key is specified in the connection"));

      const path = `${baseUrl}api/v1/data/projects/${projectId}/collections/${collectionId}`;

      try {
        // this.log(`GET ${path}`);
        const response = await axios.get(path, {
          responseType: "json",
          headers: {
            "Authorization": `Basic ${apiKey}`,
          },
        });
        // this.log(`Collection data: ${JSON.stringify(response.data, null, 2)}`);
        msg.collection = response.data;
      } catch (error) {
        this.error(error);
        return done(new Error(`Error making HTTP request: ${error}`));
      }

      // Sends the message to following Nodes
      this.send(msg);

      // Multiple outputs
      // this.send([ msg1 , msg2 ]);

      // Multiple messages
      // this.send([ [msgA1 , msgA2 , msgA3] , msg2 ]);

      // // Handle errors
      // const err = new Error();
      // if (err) {
      //   done(err);
      // }

      // this.log("Something happened");
      // this.warn("Something happened you should know about");
      // this.error("Oh no, something bad happened");

      // // Since Node-RED 0.17
      // this.trace("Log some internal detail not needed for normal operation");
      // this.debug("Log something more details for debugging the node's behaviour");

      // Status API docs: https://nodered.org/docs/creating-nodes/status
      // this.status({fill:"red",shape:"ring",text:"disconnected"});

    });

    // Tidy up state on redeploying flows
    this.on('close', function(done) {
      // tidy up any state
      // Call done() after async work

      done();
    });

  }

  // Register the configured Node wih Node-RED
  RED.nodes.registerType("read-collection", readCollectionNode);

}

module.exports = nodeInit;