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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 Dictionary {
constructor() {
this.db = null;
this.dbVer = 5;
this.entities = null;
}
initDb() {
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',
entities: '++, dictionary',
dictionaries: '++, title, version',
meta: 'name, value',
});
}
prepareDb() {
this.initDb();
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(() => {
this.initDb();
return false;
});
});
}
sealDb() {
if (this.db === null) {
return Promise.reject('database not initialized');
}
return this.db.meta.put({name: 'version', value: this.dbVer});
}
findTerm(term) {
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 => {
results.push({
expression: row.expression,
reading: row.reading,
tags: splitField(row.tags),
glossary: row.glossary,
id: row.id
});
}).then(() => {
return this.getEntities();
}).then(entities => {
for (const result of results) {
result.entities = entities;
}
return results;
});
}
findKanji(kanji) {
if (this.db === null) {
return Promise.reject('database not initialized');
}
const results = [];
return this.db.kanji.where('character').equals(kanji).each(row => {
results.push({
character: row.character,
onyomi: splitField(row.onyomi),
kunyomi: splitField(row.kunyomi),
tags: splitField(row.tags),
glossary: row.meanings
});
}).then(() => results);
}
getEntities(tags) {
if (this.db === null) {
return Promise.reject('database not initialized');
}
if (this.entities !== null) {
return Promise.resolve(this.entities);
}
return this.db.entities.toArray(rows => {
this.entities = {};
for (const row of rows) {
this.entities[row.name] = row.value;
}
return this.entities;
});
}
getDictionaries() {
if (this.db === null) {
return Promise.reject('database not initialized');
}
return this.db.dictionaries.toArray();
}
deleteDictionary(title) {
if (this.db === null) {
return Promise.reject('database not initialized');
}
const tasks = [
this.db.terms.where('dictionary').equals(title).delete(),
this.db.kanji.where('dictionary').equals(title).delete(),
this.db.entities.where('dictionary').equals(title).delete()
];
return Promise.all(tasks).then(() => {
return this.db.dictionaries.where('title').equals(title).delete();
});
}
importDb(indexUrl, callback) {
if (this.db === null) {
return Promise.reject('database not initialized');
}
const indexLoaded = (title, version, entities, hasTerms, hasKanji) => {
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);
});
};
const termsLoaded = (title, entries, total, current) => {
const rows = [];
for (const [expression, reading, tags, ...glossary] of entries) {
rows.push({
expression,
reading,
tags,
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);
}
}
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