Slice of Life slackbot. Prompts twice a day for everyone in the channel to post a picture.

slice-of-life-slackbot.gs

// INSTRUCTIONS

// Set the Incoming webhook URL in the Script Properties key-value store
// give it the key name "slack_url"

// Set a time-based Trigger of the 'DelayedTrigger' function. Have it trigger at 0800 in the desired timezone

// The script will post 2 messages:
// One between between 8am and 3pm
// The other between 3pm and 10pm

function DelayedTrigger() {
  // for readability
  var minutes = 60 * 1000
  
  // There are 840 minutes between 8am and 10pm
  var morningDelay = randomInteger(1,420)
  var eveningDelay = randomInteger(421,840)


  const now = new Date()
  var morningAlertTime = new Date(now.getTime() + (morningDelay * minutes))
  var eveningAlertTime = new Date(now.getTime() + (eveningDelay * minutes))

  Logger.log("morningDelay=" + morningDelay)
  Logger.log("morning alert " + Utilities.formatDate(morningAlertTime,"CST", "yyyy-MM-dd HH:mm:ss"))

  Logger.log("eveningDelay=" + eveningDelay)
  Logger.log("evening alert " + Utilities.formatDate(eveningAlertTime,"CST", "yyyy-MM-dd HH:mm:ss"))

  // create morning and evening triggers
  ScriptApp.newTrigger("RandomAlert")
    .timeBased()
    .after(morningDelay * minutes)
    .create();

  ScriptApp.newTrigger("RandomAlert")
    .timeBased()
    .after(eveningDelay * minutes)
    .create();
}

function RandomAlert() {
  var randomMessage = {
    'username': 'slice-of-life-bot',
    'icon_emoji': ':camera:',
    'channel': '#slice-of-life',
    'text': 'Time to post a picture! Just whatever is around you. Mundane snapshots of life welcome. @here'
  }

  // get URL from Script Properties key-value store
  var slack_url = PropertiesService.getScriptProperties().getProperty('slack_url') 

  // set the HTTP options, including the JSON payload
  var options = {
    'method' : 'post',
    'payload' : randomMessage,
    'contentType': 'application/json',
    'payload' : JSON.stringify(randomMessage)
  }

  // send the payload
  UrlFetchApp.fetch(slack_url, options);
}

// function to generate a random integer between 'min' and 'max'
function randomInteger(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}