Gmail Notifications to Chat - Notify on Google Chat when new messages/threads specified labels appear

Gmail Notifications to Chat.gs

/**
 * Email Notifications to Chat
 * 
 * Attach this script to a Sheet with two columns
 * Column A - Label
 * Column B - Webhook
 * 
 * NOTE: This script will skip the first row and only use the first two columns.
 * 
 * In column A (Label), list all of the labels for which you would like to receive notifications in Chat. 
 * In column B (Webhook), list the corresponding webhook to which you would like those notifications to be sent.
 * 
 * Messages will be detected by these labels and ultimately these labels will be removed once processing is completed.	
 * 
 * Setup a time trigger to run the script to excute the run function.
 */

const run = () => {
  const spreadsheet = SpreadsheetApp.getActiveSpreadsheet()
  const sheets = spreadsheet.getSheets()
  const config = sheets[0];
  const range = config.getDataRange()
  const values = range.getValues()

  // Remove first row which has column labels Label and Webhook
  values.shift()

  values.forEach( value => {
    const label = value[0];
    const webhook = value[1];

    if(label === "" || webhook === "") return

    const query = `label:${label}`
    const threads = GmailApp.search(query)
    threads.forEach( thread => {
      const threadLabels = thread.getLabels()
      threadLabels.forEach( threadLabel => {
        if(threadLabel.getName() === label) {
          thread.removeLabel(threadLabel)
        }
      })

      sendChatMessage( label, thread, webhook)

    })
  })
}

const sendChatMessage = (label, thread, webhook) => {
  const payload = 
  {
    sender:
    {
      displayName: "Robot",
      avatarUrl: "https://goo.gl/8oz4jG"
    },
    cards:
    [
      {
        header:
        {
          title: thread.getFirstMessageSubject(),
          subtitle: "New Message in Gmail Conversation"
        },
        sections:
        [
          {
            widgets:
            [
              {
                keyValue:
                {
                  topLabel: "Label",
                  content: label
                } 
              },
              {
                buttons:
                [
                  {
                    textButton:
                    {
                      text: "Take me to the Thread",
                      onClick:
                      {
                        openLink: 
                        {
                          url: thread.getPermalink()
                        }
                      }
                    }
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  }

  const response = UrlFetchApp.fetch(webhook, {
    headers: {
      'Content-Type': 'application/json; charset=UTF-8'
    },
    method: "POST",
    payload: JSON.stringify(payload)
  })

  Logger.log(response.getContentText())

}