78 lines
2.0 KiB
JavaScript
78 lines
2.0 KiB
JavaScript
|
export const READING_BOOKMARK_VERSION = 1
|
||
|
|
export const READING_BOOKMARK_KEY_PREFIX = 'ev-reading-bookmark:'
|
||
|
|
|
||
|
|
export const getReadingBookmarkKey = (path) =>
|
||
|
|
`${READING_BOOKMARK_KEY_PREFIX}${path || '/'}`
|
||
|
|
|
||
|
|
const clampNumber = (value, min, max, fallback = min) => {
|
||
|
|
const numeric = Number(value)
|
||
|
|
if (!Number.isFinite(numeric)) return fallback
|
||
|
|
return Math.min(max, Math.max(min, numeric))
|
||
|
|
}
|
||
|
|
|
||
|
|
export const createReadingBookmark = ({
|
||
|
|
path,
|
||
|
|
title = '',
|
||
|
|
section = '',
|
||
|
|
scrollY = 0,
|
||
|
|
progress = 0,
|
||
|
|
now = () => Date.now()
|
||
|
|
}) => ({
|
||
|
|
version: READING_BOOKMARK_VERSION,
|
||
|
|
path: path || '/',
|
||
|
|
title: String(title || '').trim(),
|
||
|
|
section: String(section || '').trim(),
|
||
|
|
scrollY: Math.max(0, Math.round(Number(scrollY) || 0)),
|
||
|
|
progress: Math.round(clampNumber(progress, 0, 100, 0)),
|
||
|
|
updatedAt: now()
|
||
|
|
})
|
||
|
|
|
||
|
|
const normalizeBookmark = (
|
||
|
|
value,
|
||
|
|
expectedPath,
|
||
|
|
maxScrollY = Number.MAX_SAFE_INTEGER
|
||
|
|
) => {
|
||
|
|
if (!value || typeof value !== 'object') return null
|
||
|
|
if (value.version !== READING_BOOKMARK_VERSION) return null
|
||
|
|
if (value.path !== expectedPath) return null
|
||
|
|
|
||
|
|
return {
|
||
|
|
version: READING_BOOKMARK_VERSION,
|
||
|
|
path: value.path,
|
||
|
|
title: String(value.title || '').trim(),
|
||
|
|
section: String(value.section || '').trim(),
|
||
|
|
scrollY: Math.round(
|
||
|
|
clampNumber(value.scrollY, 0, Math.max(0, maxScrollY), 0)
|
||
|
|
),
|
||
|
|
progress: Math.round(clampNumber(value.progress, 0, 100, 0)),
|
||
|
|
updatedAt: Number(value.updatedAt) || 0
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
export const readReadingBookmark = (storage, path, maxScrollY) => {
|
||
|
|
if (!storage) return null
|
||
|
|
|
||
|
|
try {
|
||
|
|
const expectedPath = path || '/'
|
||
|
|
const raw = storage.getItem(getReadingBookmarkKey(expectedPath))
|
||
|
|
if (!raw) return null
|
||
|
|
return normalizeBookmark(JSON.parse(raw), expectedPath, maxScrollY)
|
||
|
|
} catch {
|
||
|
|
return null
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
export const writeReadingBookmark = (storage, bookmark) => {
|
||
|
|
if (!storage || !bookmark?.path) return false
|
||
|
|
|
||
|
|
try {
|
||
|
|
storage.setItem(
|
||
|
|
getReadingBookmarkKey(bookmark.path),
|
||
|
|
JSON.stringify(bookmark)
|
||
|
|
)
|
||
|
|
return true
|
||
|
|
} catch {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
}
|