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Just For U Coupon Clipper

Clip all the coupons on the current (as of 5/21/2020) Safeway Just For U coupon system.

// ==UserScript==
// @name     Just For U Coupon Clipper
// @version  2
// @grant    none
// @include https://www.safeway.com/foru/coupons-deals.html*
// @description Clip all the coupons on the current (as of 5/21/2020) Safeway Just For U coupon system.
// @namespace https://greasyfork.org/users/22981
// ==/UserScript==

/// While the load more button exists, load more
function loadUntilDone() {
  let buttons = document.getElementsByClassName('load-more')
  
  if (buttons.length > 0) {
    // Still a load more button. Click until it goes away
    
    console.log("Loading more coupons...")
    
    try {
      buttons[0].click()
    } catch (e) {
      console.error(e)
    }

	// Give it some time to load.
      setTimeout(loadUntilDone, 1000)
  } else {
  	// Now find and click all the coupons
    console.log("Clicking all coupons...")
    clickAllUnclicked(document.querySelectorAll('.grid-coupon-btn'))
    
  }
}

/// Resolve after the given delay
async function sleep(delay) {
  return new Promise((resolve, reject) => {
  	setTimeout(resolve, delay)
  })
}

/// Click on every element in the given collection, at a sensible pace, unless alredy clicked
async function clickAllUnclicked(elems) {
	for (let i = 0; i < elems.length; i++) {
    let elem = elems[i];
    if (!elem.classList.contains('btn grid-coupon-btn btn-default')) {
      console.log("Click element " + i + ": " + elem)
      elem.click()
      await sleep(100)
    }
  }
  console.log("All coupons clicked!")
}

// Wait for the page to load and then start collecting coupons
console.log("Waiting to load coupons")
setTimeout(loadUntilDone, 4000)