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Fix watched video sync when using browser back button #11

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Fix watched video sync when using browser back button #11

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32 changes: 15 additions & 17 deletions fix.js
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Original file line number Diff line number Diff line change
@@ -1,28 +1,22 @@
function storeViewedVideos() {
if (sessionStorage.viewedItems && localStorage.dumpertPlusPlusViewedItems) {
const sessionViewedItemsArray = sessionStorage.viewedItems.split(',')
const localViewedItemsArray = localStorage.dumpertPlusPlusViewedItems.split(',')
localStorage.dumpertPlusPlusViewedItems = mergeArraysToString(sessionViewedItemsArray, localViewedItemsArray)
sessionStorage.viewedItems = localStorage.dumpertPlusPlusViewedItems
const sessionItems = sessionStorage.viewedItems
const localItems = localStorage.dumpertPlusPlusViewedItems

if (sessionItems && localItems) {
const merged = mergeArraysToString(sessionItems.split(','), localItems.split(','))
localStorage.dumpertPlusPlusViewedItems = merged
sessionStorage.viewedItems = merged
} else if (sessionItems) {
localStorage.dumpertPlusPlusViewedItems = sessionItems
} else if (localItems) {
sessionStorage.viewedItems = localItems
}

syncViewedItems()
}

function mergeArraysToString(viewItems, localItems){
return [...new Set([...viewItems, ...localItems])].toString()
}

function syncViewedItems(){
if (sessionStorage.viewedItems && !localStorage.dumpertPlusPlusViewedItems) {
localStorage.dumpertPlusPlusViewedItems = sessionStorage.viewedItems
}

if (!sessionStorage.viewedItems && localStorage.dumpertPlusPlusViewedItems) {
sessionStorage.viewedItems = localStorage.dumpertPlusPlusViewedItems
}
}

function scrollToLocation(){
window.scroll({
top: getScrollLocation(),
Expand All @@ -42,6 +36,10 @@ function getScrollLocation(){
}

window.addEventListener('beforeunload', storeViewedVideos)
window.addEventListener('pagehide', storeViewedVideos)
window.addEventListener('pageshow', storeViewedVideos)
window.addEventListener('popstate', storeViewedVideos)
window.addEventListener('visibilitychange', storeViewedVideos)
window.addEventListener('click', storeViewedVideos)
window.addEventListener('scroll', setScrollLocation)
window.addEventListener('fullscreenchange', scrollToLocation)
Expand Down