345 lines
11 KiB
Vue
345 lines
11 KiB
Vue
<template>
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<div></div>
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</template>
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<script>
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//-----------------------------------------------------------------------------
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import Vue from 'vue';
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import Component from 'vue-class-component';
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import _ from 'lodash';
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import bookManager from '../share/bookManager';
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import readerApi from '../../../api/reader';
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import * as utils from '../../../share/utils';
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import * as cryptoUtils from '../../../share/cryptoUtils';
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const maxSetTries = 5;
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export default @Component({
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watch: {
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serverStorageKey: function() {
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this.serverStorageKeyChanged();
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},
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settings: function() {
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this.debouncedSaveSettings();
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},
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profiles: function() {
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this.saveProfiles();
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},
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currentProfile: function() {
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this.currentProfileChanged();
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},
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},
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})
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class ServerStorage extends Vue {
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created() {
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this.commit = this.$store.commit;
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this.prevServerStorageKey = null;
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this.$root.$on('generateNewServerStorageKey', () => {this.generateNewServerStorageKey()});
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this.debouncedSaveSettings = _.debounce(() => {
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this.saveSettings();
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}, 500);
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this.oldProfiles = {};
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this.oldSettings = {};
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}
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async init() {
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if (!this.serverStorageKey) {
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//генерируем новый ключ
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await this.generateNewServerStorageKey();
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} else {
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await this.serverStorageKeyChanged();
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}
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await this.currentProfileChanged();
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}
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async serverStorageKeyChanged() {
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if (this.prevServerStorageKey != this.serverStorageKey) {
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this.prevServerStorageKey = this.serverStorageKey;
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this.hashedStorageKey = utils.toBase58(cryptoUtils.sha256(this.serverStorageKey));
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await this.loadProfiles();
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this.checkCurrentProfile();
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}
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}
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async currentProfileChanged() {
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if (!this.currentProfile)
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return;
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await this.loadSettings();
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}
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get serverSyncEnabled() {
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return this.$store.state.reader.serverSyncEnabled;
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}
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get settings() {
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return this.$store.state.reader.settings;
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}
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get settingsRev() {
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return this.$store.state.reader.settingsRev;
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}
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get serverStorageKey() {
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return this.$store.state.reader.serverStorageKey;
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}
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get profiles() {
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return this.$store.state.reader.profiles;
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}
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get profilesRev() {
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return this.$store.state.reader.profilesRev;
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}
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get currentProfile() {
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return this.$store.state.reader.currentProfile;
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}
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checkCurrentProfile() {
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if (!this.profiles[this.currentProfile]) {
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this.commit('reader/setCurrentProfile', '');
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}
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}
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notifySuccessIfNeeded(rev1, rev2) {
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if (rev1 != rev2)
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this.$notify.success({message: 'Данные синхронизированы с сервером'});
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}
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warning(message) {
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this.$notify.warning({message});
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}
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error(message) {
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this.$notify.error({message});
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}
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async loadSettings() {
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if (!this.serverSyncEnabled || !this.currentProfile)
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return;
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const setsId = `settings-${this.currentProfile}`;
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let sets = await this.storageGet({[setsId]: {}});
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if (sets.state == 'success') {
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const oldRev = this.settingsRev[setsId] || 0;
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sets = sets.items[setsId];
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if (sets.rev == 0)
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sets.data = {};
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this.oldSettings = sets.data;
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this.commit('reader/setSettings', sets.data);
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this.commit('reader/setSettingsRev', {[setsId]: sets.rev});
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this.notifySuccessIfNeeded(oldRev, sets.rev);
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} else {
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this.warning(`Неверный ответ сервера: ${sets.state}`);
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}
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}
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async saveSettings() {
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if (!this.serverSyncEnabled || !this.currentProfile || this.savingSettings)
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return;
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const diff = utils.getObjDiff(this.oldSettings, this.settings);
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if (utils.isEmptyObjDiff(diff))
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return;
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this.savingSettings = true;
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try {
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const setsId = `settings-${this.currentProfile}`;
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let result = {state: ''};
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let tries = 0;
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while (result.state != 'success' && tries < maxSetTries) {
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const oldRev = this.settingsRev[setsId] || 0;
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result = await this.storageSet({[setsId]: {rev: oldRev + 1, data: this.settings}});
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if (result.state == 'reject') {
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await this.loadSettings();
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const newSettings = utils.applyObjDiff(this.settings, diff);
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this.commit('reader/setSettings', newSettings);
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}
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tries++;
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}
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if (tries >= maxSetTries) {
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this.commit('reader/setSettings', this.oldSettings);
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this.error('Не удалось отправить данные на сервер');
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} else {
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this.oldSettings = this.settings;
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this.commit('reader/setSettingsRev', {[setsId]: this.settingsRev[setsId] + 1});
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}
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} finally {
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this.savingSettings = false;
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}
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}
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async loadProfiles() {
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if (!this.serverSyncEnabled)
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return;
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let prof = await this.storageGet({'profiles': {}});
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if (prof.state == 'success') {
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const oldRev = this.profilesRev;
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prof = prof.items.profiles;
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if (prof.rev == 0)
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prof.data = {};
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this.oldProfiles = prof.data;
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this.commit('reader/setProfiles', prof.data);
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this.commit('reader/setProfilesRev', prof.rev);
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this.notifySuccessIfNeeded(oldRev, prof.rev);
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} else {
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this.warning(`Неверный ответ сервера: ${prof.state}`);
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}
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}
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async saveProfiles() {
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if (!this.serverSyncEnabled || this.savingProfiles)
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return;
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const diff = utils.getObjDiff(this.oldProfiles, this.profiles);
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if (utils.isEmptyObjDiff(diff))
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return;
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this.savingProfiles = true;
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try {
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let result = {state: ''};
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let tries = 0;
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while (result.state != 'success' && tries < maxSetTries) {
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result = await this.storageSet({'profiles': {rev: this.profilesRev + 1, data: this.profiles}});
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if (result.state == 'reject') {
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await this.loadProfiles();
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const newProfiles = utils.applyObjDiff(this.profiles, diff);
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this.commit('reader/setProfiles', newProfiles);
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}
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tries++;
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}
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if (tries >= maxSetTries) {
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this.commit('reader/setProfiles', this.oldProfiles);
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this.checkCurrentProfile();
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this.error('Не удалось отправить данные на сервер');
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} else {
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this.oldProfiles = this.profiles;
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this.commit('reader/setProfilesRev', this.profilesRev + 1);
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}
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} finally {
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this.savingProfiles = false;
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}
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}
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async generateNewServerStorageKey() {
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const key = utils.toBase58(utils.randomArray(32));
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this.commit('reader/setServerStorageKey', key);
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await this.serverStorageKeyChanged();
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}
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async storageCheck(items) {
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return await this.storageApi('check', items);
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}
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async storageGet(items) {
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return await this.storageApi('get', items);
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}
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async storageSet(items, force) {
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return await this.storageApi('set', items, force);
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}
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async storageApi(action, items, force) {
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const request = {action, items};
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if (force)
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request.force = true;
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const encodedRequest = await this.encodeStorageItems(request);
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return await this.decodeStorageItems(await readerApi.storage(encodedRequest));
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}
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async encodeStorageItems(request) {
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if (!this.hashedStorageKey)
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throw new Error('hashedStorageKey is empty');
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if (!_.isObject(request.items))
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throw new Error('items is not an object');
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let result = Object.assign({}, request);
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let items = {};
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for (const id of Object.keys(request.items)) {
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const item = request.items[id];
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if (request.action == 'set' && !_.isObject(item.data))
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throw new Error('encodeStorageItems: data is not an object');
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let encoded = Object.assign({}, item);
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if (item.data) {
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const comp = utils.pako.deflate(JSON.stringify(item.data), {level: 1});
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let encrypted = null;
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try {
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encrypted = cryptoUtils.aesEncrypt(comp, this.serverStorageKey);
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} catch (e) {
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throw new Error('encrypt failed');
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}
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encoded.data = '1' + utils.toBase64(encrypted);
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}
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items[`${this.hashedStorageKey}.${utils.toBase58(id)}`] = encoded;
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}
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result.items = items;
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return result;
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}
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async decodeStorageItems(response) {
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if (!this.hashedStorageKey)
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throw new Error('hashedStorageKey is empty');
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let result = Object.assign({}, response);
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let items = {};
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if (response.items) {
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if (!_.isObject(response.items))
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throw new Error('items is not an object');
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for (const id of Object.keys(response.items)) {
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const item = response.items[id];
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let decoded = Object.assign({}, item);
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if (item.data) {
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if (!_.isString(item.data) || !item.data.length)
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throw new Error('decodeStorageItems: data is not a string');
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if (item.data[0] !== '1')
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throw new Error('decodeStorageItems: unknown data format');
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const a = utils.fromBase64(item.data.substr(1));
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let decrypted = null;
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try {
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decrypted = cryptoUtils.aesDecrypt(a, this.serverStorageKey);
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} catch (e) {
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throw new Error('decrypt failed');
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}
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decoded.data = JSON.parse(utils.pako.inflate(decrypted, {to: 'string'}));
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}
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const ids = id.split('.');
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if (!(ids.length == 2) || !(ids[0] == this.hashedStorageKey))
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throw new Error(`decodeStorageItems: bad id - ${id}`);
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items[utils.fromBase58(ids[1])] = decoded;
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}
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}
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result.items = items;
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return result;
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}
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}
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//-----------------------------------------------------------------------------
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</script>
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