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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.version = 2;
this.tagCache = {};
}
async sanitize() {
try {
const db = new Dexie('dict');
await db.open();
db.close();
if (db.verno !== this.version) {
await db.delete();
}
}
catch(error) {
// NOP
}
}
async prepare() {
if (this.db) {
throw 'database already initialized';
}
await this.sanitize();
this.db = new Dexie('dict');
this.db.version(this.version).stores({
terms: '++id,dictionary,expression,reading',
kanji: '++,dictionary,character',
tagMeta: '++,dictionary',
dictionaries: '++,title,version'
});
await this.db.open();
}
async purge() {
if (!this.db) {
throw 'database not initialized';
}
this.db.close();
await this.db.delete();
this.db = null;
this.tagCache = {};
await this.prepare();
}
async findTerms(term, dictionaries) {
if (!this.db) {
throw 'database not initialized';
}
const results = [];
await 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: dictFieldSplit(row.tags),
rules: dictFieldSplit(row.rules),
glossary: row.glossary,
score: row.score,
dictionary: row.dictionary,
id: row.id
});
}
});
await this.cacheTagMeta(dictionaries);
for (const result of results) {
result.tagMeta = this.tagCache[result.dictionary] || {};
}
return results;
}
async findKanji(kanji, dictionaries) {
if (!this.db) {
return Promise.reject('database not initialized');
}
const results = [];
await this.db.kanji.where('character').equals(kanji).each(row => {
if (dictionaries.includes(row.dictionary)) {
results.push({
character: row.character,
onyomi: dictFieldSplit(row.onyomi),
kunyomi: dictFieldSplit(row.kunyomi),
tags: dictFieldSplit(row.tags),
glossary: row.meanings,
dictionary: row.dictionary
});
}
});
await this.cacheTagMeta(dictionaries);
for (const result of results) {
result.tagMeta = this.tagCache[result.dictionary] || {};
}
return results;
}
async cacheTagMeta(dictionaries) {
if (!this.db) {
throw 'database not initialized';
}
for (const dictionary of dictionaries) {
if (!this.tagCache[dictionary]) {
const tagMeta = {};
await this.db.tagMeta.where('dictionary').equals(dictionary).each(row => {
tagMeta[row.name] = {category: row.category, notes: row.notes, order: row.order};
});
this.tagCache[dictionary] = tagMeta;
}
}
}
async getDictionaries() {
if (!this.db) {
throw 'database not initialized';
}
return this.db.dictionaries.toArray();
}
async importDictionary(archive, callback) {
if (!this.db) {
return Promise.reject('database not initialized');
}
let summary = null;
const indexLoaded = async (title, version, revision, tagMeta, hasTerms, hasKanji) => {
summary = {title, version, revision, hasTerms, hasKanji};
const count = await this.db.dictionaries.where('title').equals(title).count();
if (count > 0) {
throw `dictionary "${title}" is already imported`;
}
await this.db.dictionaries.add({title, version, revision, hasTerms, hasKanji});
const rows = [];
for (const tag in tagMeta || {}) {
const meta = tagMeta[tag];
const row = dictTagSanitize({
name: tag,
category: meta.category,
notes: meta.notes,
order: meta.order,
dictionary: title
});
rows.push(row);
}
await this.db.tagMeta.bulkAdd(rows);
};
const termsLoaded = async (title, entries, total, current) => {
if (callback) {
callback(total, current);
}
const rows = [];
for (const [expression, reading, tags, rules, score, ...glossary] of entries) {
rows.push({
expression,
reading,
tags,
rules,
score,
glossary,
dictionary: title
});
}
await this.db.terms.bulkAdd(rows);
};
const kanjiLoaded = async (title, entries, total, current) => {
if (callback) {
callback(total, current);
}
const rows = [];
for (const [character, onyomi, kunyomi, tags, ...meanings] of entries) {
rows.push({
character,
onyomi,
kunyomi,
tags,
meanings,
dictionary: title
});
}
await this.db.kanji.bulkAdd(rows);
};
await zipLoadDb(archive, indexLoaded, termsLoaded, kanjiLoaded);
return summary;
}
}
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