428 lines
15 KiB
JavaScript
428 lines
15 KiB
JavaScript
import { toRaw } from 'vue'
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import { isEqual, cloneDeep, set, get, clamp, flatten, groupBy, findLastIndex, takeRight } from 'lodash'
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import { CURRENT_UPDATE_COUNTER } from 'src/components/update_notification/update_notification.js'
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export const VERSION = 1
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export const NEW_USER_DATE = new Date('2022-08-04') // date of writing this, basically
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export const COMMAND_TRIM_FLAGS = 1000
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export const COMMAND_TRIM_FLAGS_AND_RESET = 1001
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export const defaultState = {
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// do we need to update data on server?
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dirty: false,
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// storage of flags - stuff that can only be set and incremented
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flagStorage: {
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updateCounter: 0, // Counter for most recent update notification seen
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reset: 0 // special flag that can be used to force-reset all flags, debug purposes only
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// special reset codes:
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// 1000: trim keys to those known by currently running FE
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// 1001: same as above + reset everything to 0
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},
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prefsStorage: {
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_journal: [],
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simple: {
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dontShowUpdateNotifs: false,
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collapseNav: false
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},
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collections: {
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pinnedNavItems: ['home', 'dms', 'chats']
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}
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},
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// raw data
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raw: null,
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// local cache
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cache: null
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}
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export const newUserFlags = {
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...defaultState.flagStorage,
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updateCounter: CURRENT_UPDATE_COUNTER // new users don't need to see update notification
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}
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export const _moveItemInArray = (array, value, movement) => {
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const oldIndex = array.indexOf(value)
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const newIndex = oldIndex + movement
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const newArray = [...array]
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// remove old
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newArray.splice(oldIndex, 1)
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// add new
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newArray.splice(clamp(newIndex, 0, newArray.length + 1), 0, value)
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return newArray
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}
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const _wrapData = (data, userName) => ({
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...data,
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_user: userName,
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_timestamp: Date.now(),
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_version: VERSION
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})
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const _checkValidity = (data) => data._timestamp > 0 && data._version > 0
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const _verifyPrefs = (state) => {
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state.prefsStorage = state.prefsStorage || {
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simple: {},
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collections: {}
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}
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Object.entries(defaultState.prefsStorage.simple).forEach(([k, v]) => {
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if (typeof v === 'number' || typeof v === 'boolean') return
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console.warn(`Preference simple.${k} as invalid type, reinitializing`)
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set(state.prefsStorage.simple, k, defaultState.prefsStorage.simple[k])
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})
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Object.entries(defaultState.prefsStorage.collections).forEach(([k, v]) => {
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if (Array.isArray(v)) return
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console.warn(`Preference collections.${k} as invalid type, reinitializing`)
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set(state.prefsStorage.collections, k, defaultState.prefsStorage.collections[k])
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})
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}
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export const _getRecentData = (cache, live) => {
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const result = { recent: null, stale: null, needUpload: false }
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const cacheValid = _checkValidity(cache || {})
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const liveValid = _checkValidity(live || {})
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if (!liveValid && cacheValid) {
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result.needUpload = true
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console.debug('Nothing valid stored on server, assuming cache to be source of truth')
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result.recent = cache
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result.stale = live
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} else if (!cacheValid && liveValid) {
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console.debug('Valid storage on server found, no local cache found, using live as source of truth')
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result.recent = live
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result.stale = cache
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} else if (cacheValid && liveValid) {
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console.debug('Both sources have valid data, figuring things out...')
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if (live._timestamp === cache._timestamp && live._version === cache._version) {
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console.debug('Same version/timestamp on both source, source of truth irrelevant')
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result.recent = cache
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result.stale = live
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} else {
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console.debug('Different timestamp, figuring out which one is more recent')
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if (live._timestamp < cache._timestamp) {
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result.recent = cache
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result.stale = live
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} else {
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result.recent = live
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result.stale = cache
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}
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}
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} else {
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console.debug('Both sources are invalid, start from scratch')
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result.needUpload = true
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}
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return result
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}
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export const _getAllFlags = (recent, stale) => {
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return Array.from(new Set([
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...Object.keys(toRaw((recent || {}).flagStorage || {})),
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...Object.keys(toRaw((stale || {}).flagStorage || {}))
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]))
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}
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export const _mergeFlags = (recent, stale, allFlagKeys) => {
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if (!stale.flagStorage) return recent.flagStorage
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if (!recent.flagStorage) return stale.flagStorage
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return Object.fromEntries(allFlagKeys.map(flag => {
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const recentFlag = recent.flagStorage[flag]
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const staleFlag = stale.flagStorage[flag]
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// use flag that is of higher value
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return [flag, Number((recentFlag > staleFlag ? recentFlag : staleFlag) || 0)]
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}))
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}
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const _mergeJournal = (...journals) => {
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// Ignore invalid journal entries
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const allJournals = flatten(
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journals.map(j => Array.isArray(j) ? j : [])
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).filter(entry =>
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Object.prototype.hasOwnProperty.call(entry, 'path') &&
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Object.prototype.hasOwnProperty.call(entry, 'operation') &&
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Object.prototype.hasOwnProperty.call(entry, 'args') &&
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Object.prototype.hasOwnProperty.call(entry, 'timestamp')
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)
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const grouped = groupBy(allJournals, 'path')
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const trimmedGrouped = Object.entries(grouped).map(([path, journal]) => {
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// side effect
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journal.sort((a, b) => a.timestamp > b.timestamp ? 1 : -1)
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if (path.startsWith('collections')) {
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const lastRemoveIndex = findLastIndex(journal, ({ operation }) => operation === 'removeFromCollection')
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// everything before last remove is unimportant
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if (lastRemoveIndex > 0) {
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return journal.slice(lastRemoveIndex)
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} else {
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// everything else doesn't need trimming
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return journal
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}
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} else if (path.startsWith('simple')) {
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// Only the last record is important
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return takeRight(journal)
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} else {
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return journal
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}
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})
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return flatten(trimmedGrouped)
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.sort((a, b) => a.timestamp > b.timestamp ? 1 : -1)
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}
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export const _mergePrefs = (recent, stale, allFlagKeys) => {
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if (!stale) return recent
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if (!recent) return stale
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const { _journal: recentJournal, ...recentData } = recent
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const { _journal: staleJournal } = stale
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/** Journal entry format:
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* path: path to entry in prefsStorage
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* timestamp: timestamp of the change
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* operation: operation type
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* arguments: array of arguments, depends on operation type
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*
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* currently only supported operation type is "set" which just sets the value
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* to requested one. Intended only to be used with simple preferences (boolean, number)
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* shouldn't be used with collections!
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*/
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const resultOutput = { ...recentData }
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const totalJournal = _mergeJournal(staleJournal, recentJournal)
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totalJournal.forEach(({ path, timestamp, operation, command, args }) => {
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if (path.startsWith('_')) {
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console.error(`journal contains entry to edit internal (starts with _) field '${path}', something is incorrect here, ignoring.`)
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return
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}
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switch (operation) {
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case 'set':
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set(resultOutput, path, args[0])
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break
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case 'addToCollection':
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set(resultOutput, path, Array.from(new Set(get(resultOutput, path)).add(args[0])))
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break
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case 'removeFromCollection': {
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const newSet = new Set(get(resultOutput, path))
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newSet.delete(args[0])
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set(resultOutput, path, Array.from(newSet))
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break
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}
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case 'reorderCollection': {
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const [value, movement] = args
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set(resultOutput, path, _moveItemInArray(get(resultOutput, path), value, movement))
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break
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}
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default:
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console.error(`Unknown journal operation: '${operation}', did we forget to run reverse migrations beforehand?`)
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}
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})
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return { ...resultOutput, _journal: totalJournal }
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}
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export const _resetFlags = (totalFlags, knownKeys = defaultState.flagStorage) => {
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let result = { ...totalFlags }
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const allFlagKeys = Object.keys(totalFlags)
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// flag reset functionality
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if (totalFlags.reset >= COMMAND_TRIM_FLAGS && totalFlags.reset <= COMMAND_TRIM_FLAGS_AND_RESET) {
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console.debug('Received command to trim the flags')
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const knownKeysSet = new Set(Object.keys(knownKeys))
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// Trim
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result = {}
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allFlagKeys.forEach(flag => {
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if (knownKeysSet.has(flag)) {
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result[flag] = totalFlags[flag]
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}
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})
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// Reset
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if (totalFlags.reset === COMMAND_TRIM_FLAGS_AND_RESET) {
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// 1001 - and reset everything to 0
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console.debug('Received command to reset the flags')
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Object.keys(knownKeys).forEach(flag => { result[flag] = 0 })
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}
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} else if (totalFlags.reset > 0 && totalFlags.reset < 9000) {
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console.debug('Received command to reset the flags')
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allFlagKeys.forEach(flag => { result[flag] = 0 })
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}
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result.reset = 0
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return result
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}
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export const _doMigrations = (cache) => {
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if (!cache) return cache
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if (cache._version < VERSION) {
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console.debug('Local cached data has older version, seeing if there any migrations that can be applied')
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// no migrations right now since we only have one version
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console.debug('No migrations found')
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}
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if (cache._version > VERSION) {
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console.debug('Local cached data has newer version, seeing if there any reverse migrations that can be applied')
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// no reverse migrations right now but we leave a possibility of loading a hotpatch if need be
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if (window._PLEROMA_HOTPATCH) {
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if (window._PLEROMA_HOTPATCH.reverseMigrations) {
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console.debug('Found hotpatch migration, applying')
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return window._PLEROMA_HOTPATCH.reverseMigrations.call({}, 'serverSideStorage', { from: cache._version, to: VERSION }, cache)
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}
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}
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}
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return cache
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}
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export const mutations = {
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clearServerSideStorage (state, userData) {
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state = { ...cloneDeep(defaultState) }
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},
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setServerSideStorage (state, userData) {
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const live = userData.storage
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state.raw = live
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let cache = state.cache
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if (cache && cache._user !== userData.fqn) {
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console.warn('cache belongs to another user! reinitializing local cache!')
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cache = null
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}
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cache = _doMigrations(cache)
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let { recent, stale, needsUpload } = _getRecentData(cache, live)
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const userNew = userData.created_at > NEW_USER_DATE
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const flagsTemplate = userNew ? newUserFlags : defaultState.flagStorage
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let dirty = false
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if (recent === null) {
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console.debug(`Data is empty, initializing for ${userNew ? 'new' : 'existing'} user`)
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recent = _wrapData({
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flagStorage: { ...flagsTemplate },
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prefsStorage: { ...defaultState.prefsStorage }
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})
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}
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if (!needsUpload && recent && stale) {
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console.debug('Checking if data needs merging...')
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// discarding timestamps and versions
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const { _timestamp: _0, _version: _1, ...recentData } = recent
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const { _timestamp: _2, _version: _3, ...staleData } = stale
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dirty = !isEqual(recentData, staleData)
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console.debug(`Data ${dirty ? 'needs' : 'doesn\'t need'} merging`)
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}
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const allFlagKeys = _getAllFlags(recent, stale)
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let totalFlags
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let totalPrefs
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if (dirty) {
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// Merge the flags
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console.debug('Merging the data...')
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totalFlags = _mergeFlags(recent, stale, allFlagKeys)
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_verifyPrefs(recent)
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_verifyPrefs(stale)
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totalPrefs = _mergePrefs(recent.prefsStorage, stale.prefsStorage)
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} else {
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totalFlags = recent.flagStorage
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totalPrefs = recent.prefsStorage
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}
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totalFlags = _resetFlags(totalFlags)
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recent.flagStorage = { ...flagsTemplate, ...totalFlags }
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recent.prefsStorage = { ...defaultState.prefsStorage, ...totalPrefs }
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state.dirty = dirty || needsUpload
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state.cache = recent
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// set local timestamp to smaller one if we don't have any changes
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if (stale && recent && !state.dirty) {
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state.cache._timestamp = Math.min(stale._timestamp, recent._timestamp)
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}
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state.flagStorage = state.cache.flagStorage
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state.prefsStorage = state.cache.prefsStorage
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},
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setFlag (state, { flag, value }) {
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state.flagStorage[flag] = value
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state.dirty = true
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},
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setPreference (state, { path, value }) {
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if (path.startsWith('_')) {
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console.error(`tried to edit internal (starts with _) field '${path}', ignoring.`)
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return
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}
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set(state.prefsStorage, path, value)
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state.prefsStorage._journal = [
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...state.prefsStorage._journal,
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{ operation: 'set', path, args: [value], timestamp: Date.now() }
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]
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state.dirty = true
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},
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addCollectionPreference (state, { path, value }) {
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if (path.startsWith('_')) {
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console.error(`tried to edit internal (starts with _) field '${path}', ignoring.`)
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return
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}
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const collection = new Set(get(state.prefsStorage, path))
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collection.add(value)
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set(state.prefsStorage, path, [...collection])
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state.prefsStorage._journal = [
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...state.prefsStorage._journal,
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{ operation: 'addToCollection', path, args: [value], timestamp: Date.now() }
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]
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state.dirty = true
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},
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removeCollectionPreference (state, { path, value }) {
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if (path.startsWith('_')) {
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console.error(`tried to edit internal (starts with _) field '${path}', ignoring.`)
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return
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}
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const collection = new Set(get(state.prefsStorage, path))
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collection.delete(value)
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set(state.prefsStorage, path, [...collection])
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state.prefsStorage._journal = [
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...state.prefsStorage._journal,
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{ operation: 'removeFromCollection', path, args: [value], timestamp: Date.now() }
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]
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state.dirty = true
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},
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reorderCollectionPreference (state, { path, value, movement }) {
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if (path.startsWith('_')) {
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console.error(`tried to edit internal (starts with _) field '${path}', ignoring.`)
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return
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}
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const collection = get(state.prefsStorage, path)
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const newCollection = _moveItemInArray(collection, value, movement)
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set(state.prefsStorage, path, newCollection)
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state.prefsStorage._journal = [
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...state.prefsStorage._journal,
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{ operation: 'arrangeCollection', path, args: [value], timestamp: Date.now() }
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]
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state.dirty = true
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},
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updateCache (state, { username }) {
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state.prefsStorage._journal = _mergeJournal(state.prefsStorage._journal)
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state.cache = _wrapData({
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flagStorage: toRaw(state.flagStorage),
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prefsStorage: toRaw(state.prefsStorage)
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}, username)
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}
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}
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const serverSideStorage = {
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state: {
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...cloneDeep(defaultState)
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},
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mutations,
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actions: {
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pushServerSideStorage ({ state, rootState, commit }, { force = false } = {}) {
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const needPush = state.dirty || force
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console.log(needPush)
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if (!needPush) return
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commit('updateCache', { username: rootState.users.currentUser.fqn })
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const params = { pleroma_settings_store: { 'pleroma-fe': state.cache } }
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rootState.api.backendInteractor
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.updateProfile({ params })
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.then((user) => {
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commit('setServerSideStorage', user)
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state.dirty = false
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})
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}
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}
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}
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export default serverSideStorage
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