// ==UserScript==
// @name        Happo-YLE
// @namespace   ylefi
// @description Onnellisempia uutisia.
// @include     http://yle.fi/*
// @version     1
// @grant       none
// ==/UserScript==

(($) => {
    let swap = function (image, attrName) {
        let old = image.getAttribute(attrName);
        if (old) {
            image.setAttribute(attrName, old.replace(/image\/upload\/\/?([^\/]+?)\//, (match, params) => {
                return `image/upload/${params},e_saturation:9001/`
            }));
        }
    }

    let process = (node) => {
        let container = $(node)
        container.find('[src*="image/upload"]').each((i, image) => {
            if ($(image).attr('hapokas')) return
            swap(image, 'src')
            $(image).attr('hapokas', true)
        })
        container.find('[content*="image/upload"], [data-src*="image/upload"]').each((i, image) => {
            if ($(image).attr('hapokas')) return
            swap(image, 'data-src')
            swap(image, 'content')
            $(image).attr('hapokas', true)
        })
    }

    var observer = new MutationObserver(function(mutations) {
      mutations.forEach(function(mutation) {
        if (!mutation.addedNodes) return
        if ($(mutation.target).is('img') && (mutation.attributeName == 'data-src' || mutation.attributeName == 'src')) {
            process($(mutation.target).parent())
        }
        mutation.addedNodes.forEach(process)
      })
    })

    observer.observe(document.body, {
      childList: true,
      subtree: true,
      attributes: true,
      characterData: false
    })

    process($('body'))

})(window.jQuery);