stacker.news/lib/new-comments.js

29 lines
1.1 KiB
JavaScript

const COMMENTS_VIEW_PREFIX = 'commentsViewedAt'
const COMMENTS_NUM_PREFIX = 'commentsViewNum'
export function commentsViewed (item) {
if (!item.parentId && item.lastCommentAt) {
window.localStorage.setItem(`${COMMENTS_VIEW_PREFIX}:${item.id}`, new Date(item.lastCommentAt).getTime())
window.localStorage.setItem(`${COMMENTS_NUM_PREFIX}:${item.id}`, item.ncomments)
}
}
export function commentsViewedAfterComment (rootId, createdAt) {
window.localStorage.setItem(`${COMMENTS_VIEW_PREFIX}:${rootId}`, new Date(createdAt).getTime())
const existingRootComments = window.localStorage.getItem(`${COMMENTS_NUM_PREFIX}:${rootId}`) || 0
window.localStorage.setItem(`${COMMENTS_NUM_PREFIX}:${rootId}`, existingRootComments + 1)
}
export function newComments (item) {
if (!item.parentId) {
const commentsViewedAt = window.localStorage.getItem(`${COMMENTS_VIEW_PREFIX}:${item.id}`)
const commentsViewNum = window.localStorage.getItem(`${COMMENTS_NUM_PREFIX}:${item.id}`)
if (commentsViewedAt && commentsViewNum) {
return commentsViewedAt < new Date(item.lastCommentAt).getTime() || commentsViewNum < item.ncomments
}
}
return false
}