cache-storage

isWindow = if typeof window == 'undefined' then false else true if !isWindow path = require 'path' BaseStorage = require '../Storage' moment = require 'moment' Cache = require '../../Cache' async = require 'async' class Storage extends BaseStorage async: true read: (key, fn) -> @getData( (err, data) => if err fn(err, null) else if typeof data[key] == 'undefined' fn(null, null) else @findMeta(key, (err, meta) => if err fn(err, null) else @verify(meta, (err, state) => if err fn(err, null) else if state fn(null, data[key]) else @remove(key, (err) -> if err fn(err, null) else fn(null, null) ) ) ) ) write: (key, data, dependencies = {}, fn) -> @getData( (err, all) => if err fn(err) else all[key] = data @getMeta( (err, meta) => if err fn(err) else meta[key] = dependencies @writeData(all, meta, fn) ) ) remove: (key, fn) -> @getData( (err, data) => if err fn(err) else @getMeta( (err, meta) => if err fn(err) else if typeof data[key] != 'undefined' delete data[key] delete meta[key] @writeData(data, meta, fn) ) ) removeAll: (fn) -> @writeData({}, {}, fn) clean: (conditions, fn) -> typeFn = Object.prototype.toString type = typeFn.call(conditions) if conditions == Cache.ALL @removeAll(fn) else if type == '[object Object]' if typeof conditions[Cache.TAGS] == 'undefined' conditions[Cache.TAGS] = [] if typeFn(conditions[Cache.TAGS]) == '[object String]' conditions[Cache.TAGS] = [conditions[Cache.TAGS]] removeKeys = (keys) => async.eachSeries(keys, (key, cb) => @remove(key, (err) -> cb(err) ) , (err) -> fn(err) ) keys = [] async.eachSeries(conditions[Cache.TAGS], (tag, cb) => @findKeysByTag(tag, (err, _keys) -> keys = keys.concat(_keys) cb(err) ) , (err) => if err fn(err) else if typeof conditions[Cache.PRIORITY] == 'undefined' removeKeys(keys) else @findKeysByPriority(conditions[Cache.PRIORITY], (err, _keys) => if err fn(err) else keys = keys.concat(_keys) removeKeys(keys) ) ) else fn(null) return @ findMeta: (key, fn) -> @getMeta( (err, meta) -> if err fn(err, null) else if typeof meta[key] != 'undefined' fn(null, meta[key]) else fn(null, null) ) findKeysByTag: (tag, fn) -> @getMeta( (err, metas) -> if err fn(err, null) else result = [] for key, meta of metas if typeof meta[Cache.TAGS] != 'undefined' && meta[Cache.TAGS].indexOf(tag) != -1 result.push(key) fn(null, result) ) findKeysByPriority: (priority, fn) -> @getMeta( (err, metas) -> if err fn(err, null) else result = [] for key, meta of metas if typeof meta[Cache.PRIORITY] != 'undefined' && meta[Cache.PRIORITY] <= priority result.push(key) fn(null, result) ) verify: (meta, fn) -> typefn = Object.prototype.toString if typefn.call(meta) == '[object Object]' if typeof meta[Cache.EXPIRE] != 'undefined' if moment().valueOf() >= meta[Cache.EXPIRE] fn(null, false) return null if typeof meta[Cache.ITEMS] == 'undefined' meta[Cache.ITEMS] = [] async.eachSeries(meta[Cache.ITEMS], (item, cb) => @findMeta(item, (err, meta) => if err fn(err, null) cb(new Error 'Fake error') else if meta == null fn(null, false) cb(new Error 'Fake error') else if meta != null @verify(meta, (err, state) -> if err fn(err, null) cb(new Error 'Fake error') else if state == false fn(null, false) cb(new Error 'Fake error') else cb() ) else cb() ) , (err) => if !err if typeof meta[Cache.FILES] == 'undefined' meta[Cache.FILES] = [] @checkFilesSupport() if isWindow for file, time of meta[Cache.FILES] mtime = window.require.getStats(file).mtime if mtime == null throw new Error 'File stats are disabled in your simq configuration. Can not get stats for ' + file + '.' if window.require.getStats(file).mtime.getTime() != time fn(null, false) return null fn(null, true) else files = [] for file, time of meta[Cache.FILES] files.push(file: file, time: time) for file, time of meta[Cache.FILES] async.eachSeries(files, (item, cb) => Cache.getFs().stat(item.file, (err, stats) -> if err cb(err) else if (new Date(stats.mtime)).getTime() != item.time fn(null, false) cb(new Error 'Fake error') else cb() ) , (err) -> if err && err.message == 'Fake error' # skip else if err fn(err, null) else fn(null, true) ) ) else fn(null, true) parseDependencies: (dependencies, fn) -> typefn = Object.prototype.toString result = {} if typefn.call(dependencies) == '[object Object]' if typeof dependencies[Cache.EXPIRE] != 'undefined' switch typefn.call(dependencies[Cache.EXPIRE]) when '[object String]' time = moment(dependencies[Cache.EXPIRE], Cache.TIME_FORMAT) when '[object Object]' time = moment().add(dependencies[Cache.EXPIRE]) else throw new Error 'Expire format is not valid' result[Cache.EXPIRE] = time.valueOf() if typeof dependencies[Cache.ITEMS] != 'undefined' result[Cache.ITEMS] = [] for item in dependencies[Cache.ITEMS] result[Cache.ITEMS].push(@cache.generateKey(item)) if typeof dependencies[Cache.PRIORITY] != 'undefined' result[Cache.PRIORITY] = dependencies[Cache.PRIORITY] if typeof dependencies[Cache.TAGS] != 'undefined' result[Cache.TAGS] = dependencies[Cache.TAGS] if typeof dependencies[Cache.FILES] != 'undefined' @checkFilesSupport() files = {} if isWindow for file in dependencies[Cache.FILES] mtime = window.require.getStats(file).mtime if mtime == null throw new Error 'File stats are disabled in your simq configuration. Can not get stats for ' + file + '.' file = window.require.resolve(file) files[file] = mtime.getTime() result[Cache.FILES] = files fn(null, result) else async.eachSeries(dependencies[Cache.FILES], (file, cb) -> file = path.resolve(file) Cache.getFs().stat(file, (err, stats) -> if err cb(err) else files[file] = (new Date(stats.mtime)).getTime() cb() ) , (err) -> if err fn(err, null) else result[Cache.FILES] = files fn(null, result) ) result[Cache.FILES] = files else fn(null, result) else fn(null, result) module.exports = Storage