52 lines
1.5 KiB
JavaScript
52 lines
1.5 KiB
JavaScript
// frontend/utils/handlers/preloadHandler.js
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// preload 缓存 handler（简单型，但跨用户清理 + invalidateAll）
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// 跨用户：删除所有 preload:xxx:* 不依赖 currentUid
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// 内存清理：由 cacheManager.cleanCategory 触发 invalidateAll
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const PREFIX = 'preload:'
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function listAllPreloadKeys() {
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try {
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const info = uni.getStorageInfoSync()
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return (info.keys || []).filter((k) => k.startsWith(PREFIX))
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} catch (e) { return [] }
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}
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export default {
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id: 'preload',
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label: '预加载数据缓存',
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description: '列表页提前拉取的数据',
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warning: false,
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async computeSize() {
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const keys = listAllPreloadKeys()
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let bytes = 0
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for (const k of keys) {
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try { const v = uni.getStorageSync(k); if (v != null) bytes += JSON.stringify(v).length } catch (e) {}
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}
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return { sizeBytes: bytes, keyCount: keys.length }
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},
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async clean() {
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const keys = listAllPreloadKeys()
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let freed = 0
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let count = 0
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for (const k of keys) {
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let valueBytes = 0
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try {
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const v = uni.getStorageSync(k)
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if (v != null) valueBytes = JSON.stringify(v).length
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} catch (e) {
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console.warn('[preloadHandler] read failed:', k, e.message)
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continue
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}
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try {
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uni.removeStorageSync(k)
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freed += valueBytes
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count++
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} catch (e) {
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console.warn('[preloadHandler] remove failed:', k, e.message)
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}
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}
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return { freedBytes: freed, keyCount: count }
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},
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}
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