aboutsummaryrefslogtreecommitdiff
path: root/ext/bg/js/database.js
diff options
context:
space:
mode:
Diffstat (limited to 'ext/bg/js/database.js')
-rw-r--r--ext/bg/js/database.js219
1 files changed, 219 insertions, 0 deletions
diff --git a/ext/bg/js/database.js b/ext/bg/js/database.js
new file mode 100644
index 00000000..19e3228f
--- /dev/null
+++ b/ext/bg/js/database.js
@@ -0,0 +1,219 @@
+/*
+ * 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.dbVer = 6;
+ this.entities = null;
+ }
+
+ init() {
+ 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',
+ });
+ }
+
+ prepare() {
+ this.init();
+
+ 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.init();
+ return false;
+ });
+ });
+ }
+
+ seal() {
+ 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');
+ }
+
+ 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(() => {
+ return this.db.dictionaries.where('title').equals(title).delete();
+ });
+ }
+
+ importDictionary(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);
+ }
+}