77 lines
No EOL
2.3 KiB
JavaScript
77 lines
No EOL
2.3 KiB
JavaScript
// only allows the script to execute once
|
|
if (typeof showNewCommentCounts === 'undefined') {
|
|
|
|
// localstorage comment counts format: {"<postId>": {c: <totalComments>, t: <timestampUpdated>}}
|
|
const COMMENT_COUNTS_ID = "comment-counts"
|
|
|
|
/**
|
|
* Display the number of new comments present since the last time the post was opened
|
|
*/
|
|
function showNewCommentCounts(postId, newTotal) {
|
|
const comments = JSON.parse(localStorage.getItem(COMMENT_COUNTS_ID)) || {}
|
|
|
|
const lastCount = comments[postId]
|
|
if (lastCount) {
|
|
const newComments = newTotal - lastCount.c
|
|
if (newComments > 0) {
|
|
document.querySelectorAll(`#post-${postId} .new-comments`).forEach(elem => {
|
|
elem.textContent = ` (+${newComments})`
|
|
elem.classList.remove("d-none")
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
function incrementCommentCount(postId) {
|
|
saveCommentsCount(postId)
|
|
}
|
|
|
|
/**
|
|
* Saves the comment count to the localStorage
|
|
*
|
|
* @param postId The id of the post associated with the comments
|
|
* @param lastTotalComs The new amount, If null it will just increment the previous amount
|
|
*/
|
|
function saveCommentsCount(postId, lastTotalComs = null) {
|
|
const comments = JSON.parse(localStorage.getItem(COMMENT_COUNTS_ID)) || {}
|
|
|
|
const newTotal = lastTotalComs || ((comments[postId] || { c: 0 }).c + 1)
|
|
|
|
comments[postId] = { c: newTotal, t: Date.now() }
|
|
|
|
window.localStorage.setItem(COMMENT_COUNTS_ID, JSON.stringify(comments))
|
|
}
|
|
|
|
|
|
/**
|
|
* Cleans the expired entries (5 days). It runs every hour.
|
|
*/
|
|
function cleanCommentsCache() {
|
|
const LAST_CACHE_CLEAN_ID = "last-cache-clean"
|
|
const EXPIRE_INTERVAL_MILLIS = 5 * 24 * 60 * 60 * 1000
|
|
const CACHE_CLEAN_INTERVAL = 60 * 60 * 1000 // 1 hour
|
|
|
|
function cleanCache() {
|
|
const lastCacheClean = JSON.parse(localStorage.getItem(LAST_CACHE_CLEAN_ID)) || Date.now()
|
|
const now = Date.now()
|
|
|
|
if (now - lastCacheClean > CACHE_CLEAN_INTERVAL) {
|
|
const comments = JSON.parse(localStorage.getItem(COMMENT_COUNTS_ID)) || {}
|
|
|
|
for (let [key, value] of Object.entries(comments)) {
|
|
if (now - value.t > EXPIRE_INTERVAL_MILLIS) {
|
|
delete comments[key]
|
|
}
|
|
}
|
|
window.localStorage.setItem(COMMENT_COUNTS_ID, JSON.stringify(comments))
|
|
}
|
|
window.localStorage.setItem(LAST_CACHE_CLEAN_ID, JSON.stringify(now))
|
|
}
|
|
|
|
// So it does not slow the load of the main page with the clean up
|
|
setTimeout(cleanCache, 500)
|
|
}
|
|
|
|
cleanCommentsCache()
|
|
|
|
} |