yomichan/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/>.
*/
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class Database {
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constructor() {
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this.db = null;
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this.dbVer = 6;
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this.entities = null;
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}
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init() {
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if (this.db !== null) {
return Promise.reject('database already initialized');
}
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this.db = new Dexie('dict');
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this.db.version(1).stores({
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terms: '++id, dictionary, expression, reading',
kanji: '++, dictionary, character',
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entities: '++, dictionary',
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dictionaries: '++, title, version',
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meta: 'name, value',
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});
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return Promise.resolve();
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}
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prepare() {
this.init();
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return this.db.meta.get('version').then(row => {
return row ? row.value : 0;
}).catch(() => {
return 0;
}).then(version => {
if (this.dbVer === version) {
return true;
}
const db = this.db;
this.db.close();
this.db = null;
return db.delete().then(() => {
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this.init();
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return false;
});
});
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}
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seal() {
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if (this.db === null) {
return Promise.reject('database not initialized');
}
return this.db.meta.put({name: 'version', value: this.dbVer});
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}
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findTerm(term) {
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if (this.db === null) {
return Promise.reject('database not initialized');
}
const results = [];
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return this.db.terms.where('expression').equals(term).or('reading').equals(term).each(row => {
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results.push({
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expression: row.expression,
reading: row.reading,
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tags: splitField(row.tags),
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glossary: row.glossary,
id: row.id
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});
}).then(() => {
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return this.getEntities();
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}).then(entities => {
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for (const result of results) {
result.entities = entities;
}
return results;
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});
}
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findKanji(kanji) {
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if (this.db === null) {
return Promise.reject('database not initialized');
}
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const results = [];
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return this.db.kanji.where('character').equals(kanji).each(row => {
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results.push({
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character: row.character,
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onyomi: splitField(row.onyomi),
kunyomi: splitField(row.kunyomi),
tags: splitField(row.tags),
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glossary: row.meanings
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});
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}).then(() => results);
}
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getEntities(tags) {
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if (this.db === null) {
return Promise.reject('database not initialized');
}
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if (this.entities !== null) {
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return Promise.resolve(this.entities);
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}
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return this.db.entities.toArray(rows => {
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this.entities = {};
for (const row of rows) {
this.entities[row.name] = row.value;
}
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return this.entities;
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});
}
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getDictionaries() {
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if (this.db === null) {
return Promise.reject('database not initialized');
}
return this.db.dictionaries.toArray();
}
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deleteDictionary(title) {
if (this.db === null) {
return Promise.reject('database not initialized');
}
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return this.db.terms.where('dictionary').equals(title).delete().then(() => {
return this.db.kanji.where('dictionary').equals(title).delete();
}).then(() => {
return this.db.entities.where('dictionary').equals(title).delete();
}).then(() => {
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return this.db.dictionaries.where('title').equals(title).delete();
});
}
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importDictionary(indexUrl, callback) {
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if (this.db === null) {
return Promise.reject('database not initialized');
}
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const indexLoaded = (title, version, entities, hasTerms, hasKanji) => {
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return this.db.dictionaries.where('title').equals(title).count().then(count => {
if (count > 0) {
return Promise.reject(`dictionary "${title}" is already imported`);
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}
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return this.db.dictionaries.add({title, version, hasTerms, hasKanji}).then(() => {
this.entities = entities || {};
const rows = [];
for (const name in entities || {}) {
rows.push({name, value: entities[name], dictionary: title});
}
return this.db.entities.bulkAdd(rows);
});
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});
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};
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const termsLoaded = (title, entries, total, current) => {
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const rows = [];
for (const [expression, reading, tags, ...glossary] of entries) {
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rows.push({
expression,
reading,
tags,
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glossary,
dictionary: title
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});
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}
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return this.db.terms.bulkAdd(rows).then(() => {
if (callback) {
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callback(total, current, indexUrl);
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}
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});
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};
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const kanjiLoaded = (title, entries, total, current) => {
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const rows = [];
for (const [character, onyomi, kunyomi, tags, ...meanings] of entries) {
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rows.push({
character,
onyomi,
kunyomi,
tags,
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meanings,
dictionary: title
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});
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}
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return this.db.kanji.bulkAdd(rows).then(() => {
if (callback) {
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callback(total, current, indexUrl);
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}
});
};
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return importJsonDb(indexUrl, indexLoaded, termsLoaded, kanjiLoaded);
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}
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}