617 lines
21 KiB
JavaScript
617 lines
21 KiB
JavaScript
/*
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* Copyright (C) 2016-2020 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/* global
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* JSZip
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* JsonSchema
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* dictFieldSplit
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* requestJson
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*/
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class Database {
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constructor() {
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this.db = null;
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this._schemas = new Map();
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}
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// Public
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async prepare() {
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if (this.db !== null) {
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throw new Error('Database already initialized');
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}
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try {
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this.db = await Database._open('dict', 5, (db, transaction, oldVersion) => {
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Database._upgrade(db, transaction, oldVersion, [
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{
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version: 2,
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stores: {
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terms: {
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primaryKey: {keyPath: 'id', autoIncrement: true},
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indices: ['dictionary', 'expression', 'reading']
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},
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kanji: {
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primaryKey: {autoIncrement: true},
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indices: ['dictionary', 'character']
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},
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tagMeta: {
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primaryKey: {autoIncrement: true},
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indices: ['dictionary']
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},
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dictionaries: {
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primaryKey: {autoIncrement: true},
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indices: ['title', 'version']
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}
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}
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},
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{
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version: 3,
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stores: {
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termMeta: {
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primaryKey: {autoIncrement: true},
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indices: ['dictionary', 'expression']
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},
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kanjiMeta: {
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primaryKey: {autoIncrement: true},
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indices: ['dictionary', 'character']
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},
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tagMeta: {
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primaryKey: {autoIncrement: true},
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indices: ['dictionary', 'name']
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}
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}
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},
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{
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version: 4,
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stores: {
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terms: {
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primaryKey: {keyPath: 'id', autoIncrement: true},
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indices: ['dictionary', 'expression', 'reading', 'sequence']
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}
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}
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},
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{
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version: 5,
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stores: {
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terms: {
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primaryKey: {keyPath: 'id', autoIncrement: true},
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indices: ['dictionary', 'expression', 'reading', 'sequence', 'expressionReverse', 'readingReverse']
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}
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}
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}
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]);
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});
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return true;
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} catch (e) {
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console.error(e);
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return false;
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}
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}
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async close() {
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this._validate();
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this.db.close();
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this.db = null;
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}
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isPrepared() {
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return this.db !== null;
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}
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async purge() {
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this._validate();
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this.db.close();
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await Database._deleteDatabase(this.db.name);
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this.db = null;
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await this.prepare();
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}
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async deleteDictionary(dictionaryName, onProgress, progressSettings) {
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this._validate();
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const targets = [
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['dictionaries', 'title'],
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['kanji', 'dictionary'],
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['kanjiMeta', 'dictionary'],
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['terms', 'dictionary'],
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['termMeta', 'dictionary'],
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['tagMeta', 'dictionary']
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];
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const promises = [];
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const progressData = {
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count: 0,
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processed: 0,
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storeCount: targets.length,
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storesProcesed: 0
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};
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let progressRate = (typeof progressSettings === 'object' && progressSettings !== null ? progressSettings.rate : 0);
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if (typeof progressRate !== 'number' || progressRate <= 0) {
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progressRate = 1000;
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}
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for (const [objectStoreName, index] of targets) {
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const dbTransaction = this.db.transaction([objectStoreName], 'readwrite');
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const dbObjectStore = dbTransaction.objectStore(objectStoreName);
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const dbIndex = dbObjectStore.index(index);
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const only = IDBKeyRange.only(dictionaryName);
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promises.push(Database._deleteValues(dbObjectStore, dbIndex, only, onProgress, progressData, progressRate));
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}
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await Promise.all(promises);
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}
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async findTermsBulk(termList, dictionaries, wildcard) {
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this._validate();
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const promises = [];
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const visited = new Set();
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const results = [];
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const processRow = (row, index) => {
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if (dictionaries.has(row.dictionary) && !visited.has(row.id)) {
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visited.add(row.id);
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results.push(Database._createTerm(row, index));
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}
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};
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const useWildcard = !!wildcard;
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const prefixWildcard = wildcard === 'prefix';
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const dbTransaction = this.db.transaction(['terms'], 'readonly');
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const dbTerms = dbTransaction.objectStore('terms');
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const dbIndex1 = dbTerms.index(prefixWildcard ? 'expressionReverse' : 'expression');
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const dbIndex2 = dbTerms.index(prefixWildcard ? 'readingReverse' : 'reading');
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for (let i = 0; i < termList.length; ++i) {
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const term = prefixWildcard ? stringReverse(termList[i]) : termList[i];
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const query = useWildcard ? IDBKeyRange.bound(term, `${term}\uffff`, false, false) : IDBKeyRange.only(term);
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promises.push(
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Database._getAll(dbIndex1, query, i, processRow),
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Database._getAll(dbIndex2, query, i, processRow)
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);
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}
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await Promise.all(promises);
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return results;
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}
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async findTermsExactBulk(termList, readingList, dictionaries) {
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this._validate();
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const promises = [];
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const results = [];
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const processRow = (row, index) => {
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if (row.reading === readingList[index] && dictionaries.has(row.dictionary)) {
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results.push(Database._createTerm(row, index));
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}
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};
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const dbTransaction = this.db.transaction(['terms'], 'readonly');
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const dbTerms = dbTransaction.objectStore('terms');
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const dbIndex = dbTerms.index('expression');
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for (let i = 0; i < termList.length; ++i) {
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const only = IDBKeyRange.only(termList[i]);
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promises.push(Database._getAll(dbIndex, only, i, processRow));
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}
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await Promise.all(promises);
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return results;
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}
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async findTermsBySequenceBulk(sequenceList, mainDictionary) {
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this._validate();
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const promises = [];
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const results = [];
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const processRow = (row, index) => {
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if (row.dictionary === mainDictionary) {
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results.push(Database._createTerm(row, index));
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}
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};
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const dbTransaction = this.db.transaction(['terms'], 'readonly');
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const dbTerms = dbTransaction.objectStore('terms');
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const dbIndex = dbTerms.index('sequence');
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for (let i = 0; i < sequenceList.length; ++i) {
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const only = IDBKeyRange.only(sequenceList[i]);
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promises.push(Database._getAll(dbIndex, only, i, processRow));
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}
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await Promise.all(promises);
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return results;
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}
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async findTermMetaBulk(termList, dictionaries) {
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return this._findGenericBulk('termMeta', 'expression', termList, dictionaries, Database._createTermMeta);
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}
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async findKanjiBulk(kanjiList, dictionaries) {
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return this._findGenericBulk('kanji', 'character', kanjiList, dictionaries, Database._createKanji);
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}
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async findKanjiMetaBulk(kanjiList, dictionaries) {
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return this._findGenericBulk('kanjiMeta', 'character', kanjiList, dictionaries, Database._createKanjiMeta);
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}
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async findTagForTitle(name, title) {
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this._validate();
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let result = null;
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const dbTransaction = this.db.transaction(['tagMeta'], 'readonly');
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const dbTerms = dbTransaction.objectStore('tagMeta');
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const dbIndex = dbTerms.index('name');
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const only = IDBKeyRange.only(name);
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await Database._getAll(dbIndex, only, null, (row) => {
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if (title === row.dictionary) {
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result = row;
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}
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});
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return result;
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}
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async getDictionaryInfo() {
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this._validate();
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const results = [];
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const dbTransaction = this.db.transaction(['dictionaries'], 'readonly');
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const dbDictionaries = dbTransaction.objectStore('dictionaries');
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await Database._getAll(dbDictionaries, null, null, (info) => results.push(info));
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return results;
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}
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async getDictionaryCounts(dictionaryNames, getTotal) {
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this._validate();
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const objectStoreNames = [
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'kanji',
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'kanjiMeta',
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'terms',
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'termMeta',
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'tagMeta'
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];
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const dbCountTransaction = this.db.transaction(objectStoreNames, 'readonly');
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const targets = [];
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for (const objectStoreName of objectStoreNames) {
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targets.push([
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objectStoreName,
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dbCountTransaction.objectStore(objectStoreName).index('dictionary')
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]);
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}
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// Query is required for Edge, otherwise index.count throws an exception.
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const query1 = IDBKeyRange.lowerBound('', false);
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const totalPromise = getTotal ? Database._getCounts(targets, query1) : null;
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const counts = [];
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const countPromises = [];
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for (let i = 0; i < dictionaryNames.length; ++i) {
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counts.push(null);
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const index = i;
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const query2 = IDBKeyRange.only(dictionaryNames[i]);
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const countPromise = Database._getCounts(targets, query2).then((v) => counts[index] = v);
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countPromises.push(countPromise);
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}
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await Promise.all(countPromises);
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const result = {counts};
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if (totalPromise !== null) {
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result.total = await totalPromise;
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}
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return result;
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}
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async dictionaryExists(title) {
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this._validate();
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const transaction = this.db.transaction(['dictionaries'], 'readonly');
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const index = transaction.objectStore('dictionaries').index('title');
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const query = IDBKeyRange.only(title);
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const count = await Database._getCount(index, query);
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return count > 0;
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}
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bulkAdd(objectStoreName, items, start, count) {
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return new Promise((resolve, reject) => {
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const transaction = this.db.transaction([objectStoreName], 'readwrite');
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const objectStore = transaction.objectStore(objectStoreName);
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if (start + count > items.length) {
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count = items.length - start;
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}
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if (count <= 0) {
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resolve();
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return;
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}
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const end = start + count;
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let completedCount = 0;
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const onError = (e) => reject(e);
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const onSuccess = () => {
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if (++completedCount >= count) {
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resolve();
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}
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};
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for (let i = start; i < end; ++i) {
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const request = objectStore.add(items[i]);
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request.onerror = onError;
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request.onsuccess = onSuccess;
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}
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});
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}
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// Private
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_validate() {
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if (this.db === null) {
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throw new Error('Database not initialized');
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}
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}
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async _findGenericBulk(tableName, indexName, indexValueList, dictionaries, createResult) {
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this._validate();
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const promises = [];
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const results = [];
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const processRow = (row, index) => {
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if (dictionaries.has(row.dictionary)) {
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results.push(createResult(row, index));
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}
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};
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const dbTransaction = this.db.transaction([tableName], 'readonly');
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const dbTerms = dbTransaction.objectStore(tableName);
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const dbIndex = dbTerms.index(indexName);
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for (let i = 0; i < indexValueList.length; ++i) {
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const only = IDBKeyRange.only(indexValueList[i]);
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promises.push(Database._getAll(dbIndex, only, i, processRow));
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}
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await Promise.all(promises);
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return results;
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}
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static _createTerm(row, index) {
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return {
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index,
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expression: row.expression,
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reading: row.reading,
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definitionTags: dictFieldSplit(row.definitionTags || row.tags || ''),
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termTags: dictFieldSplit(row.termTags || ''),
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rules: dictFieldSplit(row.rules),
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glossary: row.glossary,
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score: row.score,
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dictionary: row.dictionary,
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id: row.id,
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sequence: typeof row.sequence === 'undefined' ? -1 : row.sequence
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};
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}
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static _createKanji(row, index) {
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return {
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index,
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character: row.character,
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onyomi: dictFieldSplit(row.onyomi),
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kunyomi: dictFieldSplit(row.kunyomi),
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tags: dictFieldSplit(row.tags),
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glossary: row.meanings,
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stats: row.stats,
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dictionary: row.dictionary
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};
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}
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static _createTermMeta({expression, mode, data, dictionary}, index) {
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return {expression, mode, data, dictionary, index};
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}
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static _createKanjiMeta({character, mode, data, dictionary}, index) {
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return {character, mode, data, dictionary, index};
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}
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static _getAll(dbIndex, query, context, processRow) {
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const fn = typeof dbIndex.getAll === 'function' ? Database._getAllFast : Database._getAllUsingCursor;
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return fn(dbIndex, query, context, processRow);
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}
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static _getAllFast(dbIndex, query, context, processRow) {
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return new Promise((resolve, reject) => {
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const request = dbIndex.getAll(query);
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request.onerror = (e) => reject(e);
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request.onsuccess = (e) => {
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for (const row of e.target.result) {
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processRow(row, context);
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}
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resolve();
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};
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});
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}
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static _getAllUsingCursor(dbIndex, query, context, processRow) {
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return new Promise((resolve, reject) => {
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const request = dbIndex.openCursor(query, 'next');
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request.onerror = (e) => reject(e);
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request.onsuccess = (e) => {
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const cursor = e.target.result;
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if (cursor) {
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processRow(cursor.value, context);
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cursor.continue();
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} else {
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resolve();
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}
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};
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});
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}
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static _getCounts(targets, query) {
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const countPromises = [];
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const counts = {};
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for (const [objectStoreName, index] of targets) {
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const n = objectStoreName;
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const countPromise = Database._getCount(index, query).then((count) => counts[n] = count);
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countPromises.push(countPromise);
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}
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return Promise.all(countPromises).then(() => counts);
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}
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static _getCount(dbIndex, query) {
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return new Promise((resolve, reject) => {
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const request = dbIndex.count(query);
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request.onerror = (e) => reject(e);
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request.onsuccess = (e) => resolve(e.target.result);
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});
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}
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static _getAllKeys(dbIndex, query) {
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const fn = typeof dbIndex.getAllKeys === 'function' ? Database._getAllKeysFast : Database._getAllKeysUsingCursor;
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return fn(dbIndex, query);
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}
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static _getAllKeysFast(dbIndex, query) {
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return new Promise((resolve, reject) => {
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const request = dbIndex.getAllKeys(query);
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request.onerror = (e) => reject(e);
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request.onsuccess = (e) => resolve(e.target.result);
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});
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}
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static _getAllKeysUsingCursor(dbIndex, query) {
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return new Promise((resolve, reject) => {
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const primaryKeys = [];
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const request = dbIndex.openKeyCursor(query, 'next');
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request.onerror = (e) => reject(e);
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request.onsuccess = (e) => {
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const cursor = e.target.result;
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if (cursor) {
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primaryKeys.push(cursor.primaryKey);
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cursor.continue();
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} else {
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resolve(primaryKeys);
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}
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};
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});
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}
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static async _deleteValues(dbObjectStore, dbIndex, query, onProgress, progressData, progressRate) {
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const hasProgress = (typeof onProgress === 'function');
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const count = await Database._getCount(dbIndex, query);
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++progressData.storesProcesed;
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progressData.count += count;
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if (hasProgress) {
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onProgress(progressData);
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}
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const onValueDeleted = (
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hasProgress ?
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() => {
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const p = ++progressData.processed;
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if ((p % progressRate) === 0 || p === progressData.count) {
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onProgress(progressData);
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}
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} :
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() => {}
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);
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const promises = [];
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const primaryKeys = await Database._getAllKeys(dbIndex, query);
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for (const key of primaryKeys) {
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const promise = Database._deleteValue(dbObjectStore, key).then(onValueDeleted);
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promises.push(promise);
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}
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await Promise.all(promises);
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}
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static _deleteValue(dbObjectStore, key) {
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return new Promise((resolve, reject) => {
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const request = dbObjectStore.delete(key);
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request.onerror = (e) => reject(e);
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request.onsuccess = () => resolve();
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});
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}
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static _open(name, version, onUpgradeNeeded) {
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return new Promise((resolve, reject) => {
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const request = window.indexedDB.open(name, version * 10);
|
|
|
|
request.onupgradeneeded = (event) => {
|
|
try {
|
|
request.transaction.onerror = (e) => reject(e);
|
|
onUpgradeNeeded(request.result, request.transaction, event.oldVersion / 10, event.newVersion / 10);
|
|
} catch (e) {
|
|
reject(e);
|
|
}
|
|
};
|
|
|
|
request.onerror = (e) => reject(e);
|
|
request.onsuccess = () => resolve(request.result);
|
|
});
|
|
}
|
|
|
|
static _upgrade(db, transaction, oldVersion, upgrades) {
|
|
for (const {version, stores} of upgrades) {
|
|
if (oldVersion >= version) { continue; }
|
|
|
|
const objectStoreNames = Object.keys(stores);
|
|
for (const objectStoreName of objectStoreNames) {
|
|
const {primaryKey, indices} = stores[objectStoreName];
|
|
|
|
const objectStoreNames2 = transaction.objectStoreNames || db.objectStoreNames;
|
|
const objectStore = (
|
|
Database._listContains(objectStoreNames2, objectStoreName) ?
|
|
transaction.objectStore(objectStoreName) :
|
|
db.createObjectStore(objectStoreName, primaryKey)
|
|
);
|
|
|
|
for (const indexName of indices) {
|
|
if (Database._listContains(objectStore.indexNames, indexName)) { continue; }
|
|
|
|
objectStore.createIndex(indexName, indexName, {});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static _deleteDatabase(dbName) {
|
|
return new Promise((resolve, reject) => {
|
|
const request = indexedDB.deleteDatabase(dbName);
|
|
request.onerror = (e) => reject(e);
|
|
request.onsuccess = () => resolve();
|
|
});
|
|
}
|
|
|
|
static _listContains(list, value) {
|
|
for (let i = 0, ii = list.length; i < ii; ++i) {
|
|
if (list[i] === value) { return true; }
|
|
}
|
|
return false;
|
|
}
|
|
}
|