/* * Copyright (C) 2016-2020 Alex Yatskov <alex@foosoft.net> * Author: Alex Yatskov <alex@foosoft.net> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ /* global * JSZip * JsonSchema * dictFieldSplit * requestJson */ class Database { constructor() { this.db = null; this._schemas = new Map(); } // Public async prepare() { if (this.db !== null) { throw new Error('Database already initialized'); } try { this.db = await Database._open('dict', 5, (db, transaction, oldVersion) => { Database._upgrade(db, transaction, oldVersion, [ { version: 2, stores: { terms: { primaryKey: {keyPath: 'id', autoIncrement: true}, indices: ['dictionary', 'expression', 'reading'] }, kanji: { primaryKey: {autoIncrement: true}, indices: ['dictionary', 'character'] }, tagMeta: { primaryKey: {autoIncrement: true}, indices: ['dictionary'] }, dictionaries: { primaryKey: {autoIncrement: true}, indices: ['title', 'version'] } } }, { version: 3, stores: { termMeta: { primaryKey: {autoIncrement: true}, indices: ['dictionary', 'expression'] }, kanjiMeta: { primaryKey: {autoIncrement: true}, indices: ['dictionary', 'character'] }, tagMeta: { primaryKey: {autoIncrement: true}, indices: ['dictionary', 'name'] } } }, { version: 4, stores: { terms: { primaryKey: {keyPath: 'id', autoIncrement: true}, indices: ['dictionary', 'expression', 'reading', 'sequence'] } } }, { version: 5, stores: { terms: { primaryKey: {keyPath: 'id', autoIncrement: true}, indices: ['dictionary', 'expression', 'reading', 'sequence', 'expressionReverse', 'readingReverse'] } } } ]); }); return true; } catch (e) { console.error(e); return false; } } async close() { this._validate(); this.db.close(); this.db = null; } async purge() { this._validate(); this.db.close(); await Database._deleteDatabase(this.db.name); this.db = null; await this.prepare(); } async deleteDictionary(dictionaryName, onProgress, progressSettings) { this._validate(); const targets = [ ['dictionaries', 'title'], ['kanji', 'dictionary'], ['kanjiMeta', 'dictionary'], ['terms', 'dictionary'], ['termMeta', 'dictionary'], ['tagMeta', 'dictionary'] ]; const promises = []; const progressData = { count: 0, processed: 0, storeCount: targets.length, storesProcesed: 0 }; let progressRate = (typeof progressSettings === 'object' && progressSettings !== null ? progressSettings.rate : 0); if (typeof progressRate !== 'number' || progressRate <= 0) { progressRate = 1000; } for (const [objectStoreName, index] of targets) { const dbTransaction = this.db.transaction([objectStoreName], 'readwrite'); const dbObjectStore = dbTransaction.objectStore(objectStoreName); const dbIndex = dbObjectStore.index(index); const only = IDBKeyRange.only(dictionaryName); promises.push(Database._deleteValues(dbObjectStore, dbIndex, only, onProgress, progressData, progressRate)); } await Promise.all(promises); } async findTermsBulk(termList, dictionaries, wildcard) { this._validate(); const promises = []; const visited = new Set(); const results = []; const processRow = (row, index) => { if (dictionaries.has(row.dictionary) && !visited.has(row.id)) { visited.add(row.id); results.push(Database._createTerm(row, index)); } }; const useWildcard = !!wildcard; const prefixWildcard = wildcard === 'prefix'; const dbTransaction = this.db.transaction(['terms'], 'readonly'); const dbTerms = dbTransaction.objectStore('terms'); const dbIndex1 = dbTerms.index(prefixWildcard ? 'expressionReverse' : 'expression'); const dbIndex2 = dbTerms.index(prefixWildcard ? 'readingReverse' : 'reading'); for (let i = 0; i < termList.length; ++i) { const term = prefixWildcard ? stringReverse(termList[i]) : termList[i]; const query = useWildcard ? IDBKeyRange.bound(term, `${term}\uffff`, false, false) : IDBKeyRange.only(term); promises.push( Database._getAll(dbIndex1, query, i, processRow), Database._getAll(dbIndex2, query, i, processRow) ); } await Promise.all(promises); return results; } async findTermsExactBulk(termList, readingList, dictionaries) { this._validate(); const promises = []; const results = []; const processRow = (row, index) => { if (row.reading === readingList[index] && dictionaries.has(row.dictionary)) { results.push(Database._createTerm(row, index)); } }; const dbTransaction = this.db.transaction(['terms'], 'readonly'); const dbTerms = dbTransaction.objectStore('terms'); const dbIndex = dbTerms.index('expression'); for (let i = 0; i < termList.length; ++i) { const only = IDBKeyRange.only(termList[i]); promises.push(Database._getAll(dbIndex, only, i, processRow)); } await Promise.all(promises); return results; } async findTermsBySequenceBulk(sequenceList, mainDictionary) { this._validate(); const promises = []; const results = []; const processRow = (row, index) => { if (row.dictionary === mainDictionary) { results.push(Database._createTerm(row, index)); } }; const dbTransaction = this.db.transaction(['terms'], 'readonly'); const dbTerms = dbTransaction.objectStore('terms'); const dbIndex = dbTerms.index('sequence'); for (let i = 0; i < sequenceList.length; ++i) { const only = IDBKeyRange.only(sequenceList[i]); promises.push(Database._getAll(dbIndex, only, i, processRow)); } await Promise.all(promises); return results; } async findTermMetaBulk(termList, dictionaries) { return this._findGenericBulk('termMeta', 'expression', termList, dictionaries, Database._createTermMeta); } async findKanjiBulk(kanjiList, dictionaries) { return this._findGenericBulk('kanji', 'character', kanjiList, dictionaries, Database._createKanji); } async findKanjiMetaBulk(kanjiList, dictionaries) { return this._findGenericBulk('kanjiMeta', 'character', kanjiList, dictionaries, Database._createKanjiMeta); } async findTagForTitle(name, title) { this._validate(); let result = null; const dbTransaction = this.db.transaction(['tagMeta'], 'readonly'); const dbTerms = dbTransaction.objectStore('tagMeta'); const dbIndex = dbTerms.index('name'); const only = IDBKeyRange.only(name); await Database._getAll(dbIndex, only, null, (row) => { if (title === row.dictionary) { result = row; } }); return result; } async getDictionaryInfo() { this._validate(); const results = []; const dbTransaction = this.db.transaction(['dictionaries'], 'readonly'); const dbDictionaries = dbTransaction.objectStore('dictionaries'); await Database._getAll(dbDictionaries, null, null, (info) => results.push(info)); return results; } async getDictionaryCounts(dictionaryNames, getTotal) { this._validate(); const objectStoreNames = [ 'kanji', 'kanjiMeta', 'terms', 'termMeta', 'tagMeta' ]; const dbCountTransaction = this.db.transaction(objectStoreNames, 'readonly'); const targets = []; for (const objectStoreName of objectStoreNames) { targets.push([ objectStoreName, dbCountTransaction.objectStore(objectStoreName).index('dictionary') ]); } // Query is required for Edge, otherwise index.count throws an exception. const query1 = IDBKeyRange.lowerBound('', false); const totalPromise = getTotal ? Database._getCounts(targets, query1) : null; const counts = []; const countPromises = []; for (let i = 0; i < dictionaryNames.length; ++i) { counts.push(null); const index = i; const query2 = IDBKeyRange.only(dictionaryNames[i]); const countPromise = Database._getCounts(targets, query2).then((v) => counts[index] = v); countPromises.push(countPromise); } await Promise.all(countPromises); const result = {counts}; if (totalPromise !== null) { result.total = await totalPromise; } return result; } async importDictionary(archiveSource, onProgress, details) { this._validate(); const db = this.db; const hasOnProgress = (typeof onProgress === 'function'); // Read archive const archive = await JSZip.loadAsync(archiveSource); // Read and validate index const indexFileName = 'index.json'; const indexFile = archive.files[indexFileName]; if (!indexFile) { throw new Error('No dictionary index found in archive'); } const index = JSON.parse(await indexFile.async('string')); const indexSchema = await this._getSchema('/bg/data/dictionary-index-schema.json'); Database._validateJsonSchema(index, indexSchema, indexFileName); const dictionaryTitle = index.title; const version = index.format || index.version; if (!dictionaryTitle || !index.revision) { throw new Error('Unrecognized dictionary format'); } // Verify database is not already imported if (await this._dictionaryExists(dictionaryTitle)) { throw new Error('Dictionary is already imported'); } // Data format converters const convertTermBankEntry = (entry) => { if (version === 1) { const [expression, reading, definitionTags, rules, score, ...glossary] = entry; return {expression, reading, definitionTags, rules, score, glossary}; } else { const [expression, reading, definitionTags, rules, score, glossary, sequence, termTags] = entry; return {expression, reading, definitionTags, rules, score, glossary, sequence, termTags}; } }; const convertTermMetaBankEntry = (entry) => { const [expression, mode, data] = entry; return {expression, mode, data}; }; const convertKanjiBankEntry = (entry) => { if (version === 1) { const [character, onyomi, kunyomi, tags, ...meanings] = entry; return {character, onyomi, kunyomi, tags, meanings}; } else { const [character, onyomi, kunyomi, tags, meanings, stats] = entry; return {character, onyomi, kunyomi, tags, meanings, stats}; } }; const convertKanjiMetaBankEntry = (entry) => { const [character, mode, data] = entry; return {character, mode, data}; }; const convertTagBankEntry = (entry) => { const [name, category, order, notes, score] = entry; return {name, category, order, notes, score}; }; // Archive file reading const readFileSequence = async (fileNameFormat, convertEntry, schema) => { const results = []; for (let i = 1; true; ++i) { const fileName = fileNameFormat.replace(/\?/, `${i}`); const file = archive.files[fileName]; if (!file) { break; } const entries = JSON.parse(await file.async('string')); Database._validateJsonSchema(entries, schema, fileName); for (let entry of entries) { entry = convertEntry(entry); entry.dictionary = dictionaryTitle; results.push(entry); } } return results; }; // Load schemas const dataBankSchemaPaths = this.constructor._getDataBankSchemaPaths(version); const dataBankSchemas = await Promise.all(dataBankSchemaPaths.map((path) => this._getSchema(path))); // Load data const termList = await readFileSequence('term_bank_?.json', convertTermBankEntry, dataBankSchemas[0]); const termMetaList = await readFileSequence('term_meta_bank_?.json', convertTermMetaBankEntry, dataBankSchemas[1]); const kanjiList = await readFileSequence('kanji_bank_?.json', convertKanjiBankEntry, dataBankSchemas[2]); const kanjiMetaList = await readFileSequence('kanji_meta_bank_?.json', convertKanjiMetaBankEntry, dataBankSchemas[3]); const tagList = await readFileSequence('tag_bank_?.json', convertTagBankEntry, dataBankSchemas[4]); // Old tags const indexTagMeta = index.tagMeta; if (typeof indexTagMeta === 'object' && indexTagMeta !== null) { for (const name of Object.keys(indexTagMeta)) { const {category, order, notes, score} = indexTagMeta[name]; tagList.push({name, category, order, notes, score}); } } // Prefix wildcard support const prefixWildcardsSupported = !!details.prefixWildcardsSupported; if (prefixWildcardsSupported) { for (const entry of termList) { entry.expressionReverse = stringReverse(entry.expression); entry.readingReverse = stringReverse(entry.reading); } } // Add dictionary const summary = { title: dictionaryTitle, revision: index.revision, sequenced: index.sequenced, version, prefixWildcardsSupported }; { const transaction = db.transaction(['dictionaries'], 'readwrite'); const objectStore = transaction.objectStore('dictionaries'); await Database._bulkAdd(objectStore, [summary], 0, 1); } // Add data const errors = []; const total = ( termList.length + termMetaList.length + kanjiList.length + kanjiMetaList.length + tagList.length ); let loadedCount = 0; const maxTransactionLength = 1000; const bulkAdd = async (objectStoreName, entries) => { const ii = entries.length; for (let i = 0; i < ii; i += maxTransactionLength) { const count = Math.min(maxTransactionLength, ii - i); try { const transaction = db.transaction([objectStoreName], 'readwrite'); const objectStore = transaction.objectStore(objectStoreName); await Database._bulkAdd(objectStore, entries, i, count); } catch (e) { errors.push(e); } loadedCount += count; if (hasOnProgress) { onProgress(total, loadedCount); } } }; await bulkAdd('terms', termList); await bulkAdd('termMeta', termMetaList); await bulkAdd('kanji', kanjiList); await bulkAdd('kanjiMeta', kanjiMetaList); await bulkAdd('tagMeta', tagList); return {result: summary, errors}; } // Private _validate() { if (this.db === null) { throw new Error('Database not initialized'); } } async _getSchema(fileName) { let schemaPromise = this._schemas.get(fileName); if (typeof schemaPromise !== 'undefined') { return schemaPromise; } schemaPromise = requestJson(chrome.runtime.getURL(fileName), 'GET'); this._schemas.set(fileName, schemaPromise); return schemaPromise; } static _validateJsonSchema(value, schema, fileName) { try { JsonSchema.validate(value, schema); } catch (e) { throw Database._formatSchemaError(e, fileName); } } static _formatSchemaError(e, fileName) { const valuePathString = Database._getSchemaErrorPathString(e.info.valuePath, 'dictionary'); const schemaPathString = Database._getSchemaErrorPathString(e.info.schemaPath, 'schema'); const e2 = new Error(`Dictionary has invalid data in '${fileName}' for value '${valuePathString}', validated against '${schemaPathString}': ${e.message}`); e2.data = e; return e2; } static _getSchemaErrorPathString(infoList, base='') { let result = base; for (const [part] of infoList) { switch (typeof part) { case 'string': if (result.length > 0) { result += '.'; } result += part; break; case 'number': result += `[${part}]`; break; } } return result; } static _getDataBankSchemaPaths(version) { const termBank = ( version === 1 ? '/bg/data/dictionary-term-bank-v1-schema.json' : '/bg/data/dictionary-term-bank-v3-schema.json' ); const termMetaBank = '/bg/data/dictionary-term-meta-bank-v3-schema.json'; const kanjiBank = ( version === 1 ? '/bg/data/dictionary-kanji-bank-v1-schema.json' : '/bg/data/dictionary-kanji-bank-v3-schema.json' ); const kanjiMetaBank = '/bg/data/dictionary-kanji-meta-bank-v3-schema.json'; const tagBank = '/bg/data/dictionary-tag-bank-v3-schema.json'; return [termBank, termMetaBank, kanjiBank, kanjiMetaBank, tagBank]; } async _dictionaryExists(title) { const db = this.db; const dbCountTransaction = db.transaction(['dictionaries'], 'readonly'); const dbIndex = dbCountTransaction.objectStore('dictionaries').index('title'); const only = IDBKeyRange.only(title); const count = await Database._getCount(dbIndex, only); return count > 0; } async _findGenericBulk(tableName, indexName, indexValueList, dictionaries, createResult) { this._validate(); const promises = []; const results = []; const processRow = (row, index) => { if (dictionaries.has(row.dictionary)) { results.push(createResult(row, index)); } }; const dbTransaction = this.db.transaction([tableName], 'readonly'); const dbTerms = dbTransaction.objectStore(tableName); const dbIndex = dbTerms.index(indexName); for (let i = 0; i < indexValueList.length; ++i) { const only = IDBKeyRange.only(indexValueList[i]); promises.push(Database._getAll(dbIndex, only, i, processRow)); } await Promise.all(promises); return results; } static _createTerm(row, index) { return { index, expression: row.expression, reading: row.reading, definitionTags: dictFieldSplit(row.definitionTags || row.tags || ''), termTags: dictFieldSplit(row.termTags || ''), rules: dictFieldSplit(row.rules), glossary: row.glossary, score: row.score, dictionary: row.dictionary, id: row.id, sequence: typeof row.sequence === 'undefined' ? -1 : row.sequence }; } static _createKanji(row, index) { return { index, character: row.character, onyomi: dictFieldSplit(row.onyomi), kunyomi: dictFieldSplit(row.kunyomi), tags: dictFieldSplit(row.tags), glossary: row.meanings, stats: row.stats, dictionary: row.dictionary }; } static _createTermMeta({expression, mode, data, dictionary}, index) { return {expression, mode, data, dictionary, index}; } static _createKanjiMeta({character, mode, data, dictionary}, index) { return {character, mode, data, dictionary, index}; } static _getAll(dbIndex, query, context, processRow) { const fn = typeof dbIndex.getAll === 'function' ? Database._getAllFast : Database._getAllUsingCursor; return fn(dbIndex, query, context, processRow); } static _getAllFast(dbIndex, query, context, processRow) { return new Promise((resolve, reject) => { const request = dbIndex.getAll(query); request.onerror = (e) => reject(e); request.onsuccess = (e) => { for (const row of e.target.result) { processRow(row, context); } resolve(); }; }); } static _getAllUsingCursor(dbIndex, query, context, processRow) { return new Promise((resolve, reject) => { const request = dbIndex.openCursor(query, 'next'); request.onerror = (e) => reject(e); request.onsuccess = (e) => { const cursor = e.target.result; if (cursor) { processRow(cursor.value, context); cursor.continue(); } else { resolve(); } }; }); } static _getCounts(targets, query) { const countPromises = []; const counts = {}; for (const [objectStoreName, index] of targets) { const n = objectStoreName; const countPromise = Database._getCount(index, query).then((count) => counts[n] = count); countPromises.push(countPromise); } return Promise.all(countPromises).then(() => counts); } static _getCount(dbIndex, query) { return new Promise((resolve, reject) => { const request = dbIndex.count(query); request.onerror = (e) => reject(e); request.onsuccess = (e) => resolve(e.target.result); }); } static _getAllKeys(dbIndex, query) { const fn = typeof dbIndex.getAllKeys === 'function' ? Database._getAllKeysFast : Database._getAllKeysUsingCursor; return fn(dbIndex, query); } static _getAllKeysFast(dbIndex, query) { return new Promise((resolve, reject) => { const request = dbIndex.getAllKeys(query); request.onerror = (e) => reject(e); request.onsuccess = (e) => resolve(e.target.result); }); } static _getAllKeysUsingCursor(dbIndex, query) { return new Promise((resolve, reject) => { const primaryKeys = []; const request = dbIndex.openKeyCursor(query, 'next'); request.onerror = (e) => reject(e); request.onsuccess = (e) => { const cursor = e.target.result; if (cursor) { primaryKeys.push(cursor.primaryKey); cursor.continue(); } else { resolve(primaryKeys); } }; }); } static async _deleteValues(dbObjectStore, dbIndex, query, onProgress, progressData, progressRate) { const hasProgress = (typeof onProgress === 'function'); const count = await Database._getCount(dbIndex, query); ++progressData.storesProcesed; progressData.count += count; if (hasProgress) { onProgress(progressData); } const onValueDeleted = ( hasProgress ? () => { const p = ++progressData.processed; if ((p % progressRate) === 0 || p === progressData.count) { onProgress(progressData); } } : () => {} ); const promises = []; const primaryKeys = await Database._getAllKeys(dbIndex, query); for (const key of primaryKeys) { const promise = Database._deleteValue(dbObjectStore, key).then(onValueDeleted); promises.push(promise); } await Promise.all(promises); } static _deleteValue(dbObjectStore, key) { return new Promise((resolve, reject) => { const request = dbObjectStore.delete(key); request.onerror = (e) => reject(e); request.onsuccess = () => resolve(); }); } static _bulkAdd(objectStore, items, start, count) { return new Promise((resolve, reject) => { if (start + count > items.length) { count = items.length - start; } if (count <= 0) { resolve(); return; } const end = start + count; let completedCount = 0; const onError = (e) => reject(e); const onSuccess = () => { if (++completedCount >= count) { resolve(); } }; for (let i = start; i < end; ++i) { const request = objectStore.add(items[i]); request.onerror = onError; request.onsuccess = onSuccess; } }); } static _open(name, version, onUpgradeNeeded) { return new Promise((resolve, reject) => { 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; } }