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authorAlex Yatskov <alex@foosoft.net>2016-12-22 18:50:58 -0800
committerAlex Yatskov <alex@foosoft.net>2016-12-22 18:50:58 -0800
commit39fa11f72bae62985ee5b27103e5959dab30316c (patch)
treee7fe89d18a2b0bfa892ede044d7e6dcc076bbf7b /ext/bg/js/database.js
parent5710dc55a73491a0be2259fbd21874bddda54877 (diff)
parent9d21f8a456530c29c7c03db4896562a4902f6f8a (diff)
Merge branch 'dev'
Diffstat (limited to 'ext/bg/js/database.js')
-rw-r--r--ext/bg/js/database.js297
1 files changed, 297 insertions, 0 deletions
diff --git a/ext/bg/js/database.js b/ext/bg/js/database.js
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+/*
+ * Copyright (C) 2016 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 <http://www.gnu.org/licenses/>.
+ */
+
+
+class Database {
+ constructor() {
+ this.db = null;
+ this.tagMetaCache = {};
+ }
+
+ prepare() {
+ if (this.db !== null) {
+ return Promise.reject('database already initialized');
+ }
+
+ this.db = new Dexie('dict');
+ this.db.version(1).stores({
+ terms: '++id,dictionary,expression,reading',
+ kanji: '++,dictionary,character',
+ tagMeta: '++,dictionary',
+ dictionaries: '++,title,version',
+ });
+
+ return this.db.open();
+ }
+
+ purge() {
+ if (this.db === null) {
+ return Promise.reject('database not initialized');
+ }
+
+ this.db.close();
+ return this.db.delete().then(() => {
+ this.db = null;
+ this.tagMetaCache = {};
+ return this.prepare();
+ });
+ }
+
+ findTerm(term, dictionaries) {
+ if (this.db === null) {
+ return Promise.reject('database not initialized');
+ }
+
+ const results = [];
+ return this.db.terms.where('expression').equals(term).or('reading').equals(term).each(row => {
+ if (dictionaries.includes(row.dictionary)) {
+ results.push({
+ expression: row.expression,
+ reading: row.reading,
+ tags: splitField(row.tags),
+ rules: splitField(row.rules),
+ glossary: row.glossary,
+ score: row.score,
+ dictionary: row.dictionary,
+ id: row.id
+ });
+ }
+ }).then(() => {
+ return this.cacheTagMeta(dictionaries);
+ }).then(() => {
+ for (const result of results) {
+ result.tagMeta = this.tagMetaCache[result.dictionary] || {};
+ }
+
+ return results;
+ });
+ }
+
+ findKanji(kanji, dictionaries) {
+ if (this.db === null) {
+ return Promise.reject('database not initialized');
+ }
+
+ const results = [];
+ return this.db.kanji.where('character').equals(kanji).each(row => {
+ if (dictionaries.includes(row.dictionary)) {
+ results.push({
+ character: row.character,
+ onyomi: splitField(row.onyomi),
+ kunyomi: splitField(row.kunyomi),
+ tags: splitField(row.tags),
+ glossary: row.meanings,
+ dictionary: row.dictionary
+ });
+ }
+ }).then(() => {
+ return this.cacheTagMeta(dictionaries);
+ }).then(() => {
+ for (const result of results) {
+ result.tagMeta = this.tagMetaCache[result.dictionary] || {};
+ }
+
+ return results;
+ });
+ }
+
+ cacheTagMeta(dictionaries) {
+ if (this.db === null) {
+ return Promise.reject('database not initialized');
+ }
+
+ const promises = [];
+ for (const dictionary of dictionaries) {
+ if (this.tagMetaCache[dictionary]) {
+ continue;
+ }
+
+ const tagMeta = {};
+ promises.push(
+ this.db.tagMeta.where('dictionary').equals(dictionary).each(row => {
+ tagMeta[row.name] = {category: row.category, notes: row.notes, order: row.order};
+ }).then(() => {
+ this.tagMetaCache[dictionary] = tagMeta;
+ })
+ );
+ }
+
+ return Promise.all(promises);
+ }
+
+ getDictionaries() {
+ if (this.db === null) {
+ return Promise.reject('database not initialized');
+ }
+
+ return this.db.dictionaries.toArray();
+ }
+
+ deleteDictionary(title, callback) {
+ if (this.db === null) {
+ return Promise.reject('database not initialized');
+ }
+
+ return this.db.dictionaries.where('title').equals(title).first(info => {
+ if (!info) {
+ return;
+ }
+
+ let termCounter = Promise.resolve(0);
+ if (info.hasTerms) {
+ termCounter = this.db.terms.where('dictionary').equals(title).count();
+ }
+
+ let kanjiCounter = Promise.resolve(0);
+ if (info.hasKanji) {
+ kanjiCounter = this.db.kanji.where('dictionary').equals(title).count();
+ }
+
+ return Promise.all([termCounter, kanjiCounter]).then(([termCount, kanjiCount]) => {
+ const rowLimit = 500;
+ const totalCount = termCount + kanjiCount;
+ let deletedCount = 0;
+
+ let termDeleter = Promise.resolve();
+ if (info.hasTerms) {
+ const termDeleterFunc = () => {
+ return this.db.terms.where('dictionary').equals(title).limit(rowLimit).delete().then(count => {
+ if (count === 0) {
+ return Promise.resolve();
+ }
+
+ deletedCount += count;
+ if (callback) {
+ callback(totalCount, deletedCount);
+ }
+
+ return termDeleterFunc();
+ });
+ };
+
+ termDeleter = termDeleterFunc();
+ }
+
+ let kanjiDeleter = Promise.resolve();
+ if (info.hasKanji) {
+ const kanjiDeleterFunc = () => {
+ return this.db.kanji.where('dictionary').equals(title).limit(rowLimit).delete().then(count => {
+ if (count === 0) {
+ return Promise.resolve();
+ }
+
+ deletedCount += count;
+ if (callback) {
+ callback(totalCount, deletedCount);
+ }
+
+ return kanjiDeleterFunc();
+ });
+ };
+
+ kanjiDeleter = kanjiDeleterFunc();
+ }
+
+ return Promise.all([termDeleter, kanjiDeleter]);
+ });
+ }).then(() => {
+ return this.db.tagMeta.where('dictionary').equals(title).delete();
+ }).then(() => {
+ return this.db.dictionaries.where('title').equals(title).delete();
+ }).then(() => {
+ delete this.cacheTagMeta[title];
+ });
+ }
+
+ importDictionary(indexUrl, callback) {
+ if (this.db === null) {
+ return Promise.reject('database not initialized');
+ }
+
+ let summary = null;
+ const indexLoaded = (title, version, tagMeta, hasTerms, hasKanji) => {
+ summary = {title, hasTerms, hasKanji, version};
+ return this.db.dictionaries.where('title').equals(title).count().then(count => {
+ if (count > 0) {
+ return Promise.reject(`dictionary "${title}" is already imported`);
+ }
+
+ return this.db.dictionaries.add({title, version, hasTerms, hasKanji}).then(() => {
+ const rows = [];
+ for (const tag in tagMeta || {}) {
+ const meta = tagMeta[tag];
+ const row = sanitizeTag({
+ name: tag,
+ category: meta.category,
+ notes: meta.notes,
+ order: meta.order,
+ dictionary: title
+ });
+
+ rows.push(row);
+ }
+
+ return this.db.tagMeta.bulkAdd(rows);
+ });
+ });
+ };
+
+ const termsLoaded = (title, entries, total, current) => {
+ const rows = [];
+ for (const [expression, reading, tags, rules, score, ...glossary] of entries) {
+ rows.push({
+ expression,
+ reading,
+ tags,
+ rules,
+ score,
+ glossary,
+ dictionary: title
+ });
+ }
+
+ return this.db.terms.bulkAdd(rows).then(() => {
+ if (callback) {
+ callback(total, current, indexUrl);
+ }
+ });
+ };
+
+ const kanjiLoaded = (title, entries, total, current) => {
+ const rows = [];
+ for (const [character, onyomi, kunyomi, tags, ...meanings] of entries) {
+ rows.push({
+ character,
+ onyomi,
+ kunyomi,
+ tags,
+ meanings,
+ dictionary: title
+ });
+ }
+
+ return this.db.kanji.bulkAdd(rows).then(() => {
+ if (callback) {
+ callback(total, current, indexUrl);
+ }
+ });
+ };
+
+ return importJsonDb(indexUrl, indexLoaded, termsLoaded, kanjiLoaded).then(() => summary);
+ }
+}