89 lines
4.2 KiB
JavaScript
89 lines
4.2 KiB
JavaScript
// 仅保存本次进程内的数据，不写入手机本地存储。
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const TTL = 45000;
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const policies = {
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coupleInfo: 300000, getBgConfig: 300000,
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timelineList: TTL, timelineDetail: TTL, albumList: TTL, photos: TTL,
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diaryList: TTL, diaryDetail: TTL, diaryCommentList: TTL,
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songsList: TTL, checkinList: TTL, checkinStats: TTL, checkinDetail: TTL,
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smokingInfo: TTL,
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petInfo: TTL, petAchievements: TTL, activityLogList: TTL
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};
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const groups = {
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couple: ['coupleInfo'], timeline: ['timelineList', 'timelineDetail'],
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album: ['albumList', 'photos'], diary: ['diaryList', 'diaryDetail', 'diaryCommentList'],
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songs: ['songsList'], checkin: ['checkinList', 'checkinStats', 'checkinDetail'],
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pet: ['petInfo', 'petAchievements'], background: ['getBgConfig']
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};
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let entries = new Map();
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let versions = {};
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let scope = '';
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let epoch = 0;
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function currentScope() {
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const next = String(wx.getStorageSync('userId') || '') + ':' + String(wx.getStorageSync('coupleId') || '');
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if (next !== scope) { scope = next; clear(); }
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return scope;
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}
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function clear() { entries.clear(); versions = {}; epoch++; }
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function signature(actions) {
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currentScope();
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return epoch + ':' + actions.map(action => action + ':' + (versions[action] || 0)).join('|');
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}
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function invalidate(actions) {
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currentScope();
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actions.forEach(action => { versions[action] = (versions[action] || 0) + 1; });
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entries.forEach((entry, key) => { if (actions.indexOf(entry.action) >= 0) entries.delete(key); });
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}
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function stable(value) {
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if (Array.isArray(value)) return value.map(stable);
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if (value && typeof value === 'object') {
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const out = {};
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Object.keys(value).sort().forEach(key => {
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if (value[key] !== undefined && value[key] !== null) out[key] = stable(value[key]);
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});
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return out;
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}
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return value;
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}
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function copy(value) { return value == null ? value : JSON.parse(JSON.stringify(value)); }
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async function read(action, data, fetch) {
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currentScope();
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if (!policies[action]) return fetch();
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const key = action + ':' + JSON.stringify(stable(data || {}));
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let entry = entries.get(key);
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if (entry && entry.pending) return entry.pending.then(copy);
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if (entry && Date.now() - entry.time < policies[action]) return copy(entry.value);
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entry = { action };
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// 不缓存失败；失效或身份切换后，旧请求不能写回缓存。
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entries.set(key, entry);
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entry.pending = Promise.resolve().then(fetch).then(value => {
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if (entries.get(key) === entry) {
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entry.value = copy(value); entry.time = Date.now(); entry.pending = null;
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// 限制详情/分页缓存数量，避免长时间浏览占用过多内存。
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if (entries.size > 150) entries.delete(entries.keys().next().value);
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}
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return value;
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}, error => {
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if (entries.get(key) === entry) entries.delete(key);
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throw error;
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});
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return entry.pending.then(copy);
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}
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function mutation(action, result) {
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if (result && (result.error || result.success === false)) return;
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if (/^(logout|respondInvitation|acceptShareInvite|unbindRequest|unbindRespond|unbindCancel)$/.test(action)) { clear(); return; }
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let group;
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if (/^(updateProfile|updatePartnerProfile|updateCoupleInfo|updateLocation|updateIpLocation|uploadAvatar|uploadPartnerAvatar)$/.test(action)) group = 'couple';
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else if (/^timeline(Add|Update|Delete)$/.test(action)) group = 'timeline';
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else if (/^(album(Add|Update|Delete)|photo(Add|Update|Delete|Upload))$/.test(action)) group = 'album';
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else if (/^diary(Add|Update|Delete|CommentAdd|CommentDelete)$/.test(action)) group = 'diary';
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else if (/^songs(Add|Update|Delete)$/.test(action)) group = 'songs';
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else if (action === "smokingAction") { invalidate(["smokingInfo"]); group = "checkin"; }
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else if (/^checkin(Add|Do|Delete)$/.test(action)) { invalidate(groups.pet); group = 'checkin'; }
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else if (/^pet(Adopt|DailyAction|Rename)$/.test(action)) group = 'pet';
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else if (/^(setBgImage|deleteBgImage)$/.test(action)) group = 'background';
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if (group) invalidate(groups[group].concat(['activityLogList']));
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// 展示作者资料的列表也需要更新头像/昵称。
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if (group === 'couple') invalidate(groups.timeline.concat(groups.diary, groups.checkin));
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}
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module.exports = { read, invalidate, mutation, clear, signature, policies, TTL };
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