aboutsummaryrefslogtreecommitdiff
path: root/ext/bg/js/database.js
blob: 65fc78fbb4545ddc7b04866d2d8bcb44e4e7bb53 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
/*
 * Copyright (C) 2016-2017  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(e) {
            // 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, titles) {
        if (!this.db) {
            throw 'database not initialized';
        }

        const results = [];
        await this.db.terms.where('expression').equals(term).or('reading').equals(term).each(row => {
            if (titles.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(titles);
        for (const result of results) {
            result.tagMeta = this.tagCache[result.dictionary] || {};
        }

        return results;
    }

    async findKanji(kanji, titles) {
        if (!this.db) {
            return Promise.reject('database not initialized');
        }

        const results = [];
        await this.db.kanji.where('character').equals(kanji).each(row => {
            if (titles.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(titles);
        for (const result of results) {
            result.tagMeta = this.tagCache[result.dictionary] || {};
        }

        return results;
    }

    async cacheTagMeta(titles) {
        if (!this.db) {
            throw 'database not initialized';
        }

        for (const title of titles) {
            if (!this.tagCache[title]) {
                const tagMeta = {};
                await this.db.tagMeta.where('dictionary').equals(title).each(row => {
                    tagMeta[row.name] = {category: row.category, notes: row.notes, order: row.order};
                });

                this.tagCache[title] = tagMeta;
            }
        }
    }

    async getDictionaries() {
        if (this.db) {
            return this.db.dictionaries.toArray();
        } else {
            throw 'database not initialized';
        }
    }

    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);
            }

            await this.db.transaction('rw', this.db.terms, async function() {
                for (const [expression, reading, tags, rules, score, ...glossary] of entries) {
                    this.db.terms.add({
                        expression,
                        reading,
                        tags,
                        rules,
                        score,
                        glossary,
                        dictionary: title
                    });
                }
            });
        };

        const kanjiLoaded = async (title, entries, total, current)  => {
            if (callback) {
                callback(total, current);
            }

            await this.db.transaction('rw', this.db.kanji, async function() {
                for (const [character, onyomi, kunyomi, tags, ...meanings] of entries) {
                    this.db.kanji.add({
                        character,
                        onyomi,
                        kunyomi,
                        tags,
                        meanings,
                        dictionary: title
                    });
                }
            });
        };

        await Database.importDictionaryZip(archive, indexLoaded, termsLoaded, kanjiLoaded);
        return summary;
    }

    static async importDictionaryZip(archive, indexLoaded, termsLoaded, kanjiLoaded) {
        const files = (await JSZip.loadAsync(archive)).files;

        const indexFile = files['index.json'];
        if (!indexFile) {
            throw 'no dictionary index found in archive';
        }

        const index = JSON.parse(await indexFile.async('string'));
        if (!index.title || !index.version || !index.revision) {
            throw 'unrecognized dictionary format';
        }

        await indexLoaded(
            index.title,
            index.version,
            index.revision,
            index.tagMeta || {},
            index.termBanks > 0,
            index.kanjiBanks > 0
        );

        const banksTotal = index.termBanks + index.kanjiBanks;
        let banksLoaded = 0;

        for (let i = 1; i <= index.termBanks; ++i) {
            const bankFile = files[`term_bank_${i}.json`];
            if (bankFile) {
                const bank = JSON.parse(await bankFile.async('string'));
                await termsLoaded(index.title, bank, banksTotal, banksLoaded++);
            } else {
                throw 'missing term bank file';
            }
        }

        for (let i = 1; i <= index.kanjiBanks; ++i) {
            const bankFile = files[`kanji_bank_${i}.json`];
            if (bankFile) {
                const bank = JSON.parse(await bankFile.async('string'));
                await kanjiLoaded(index.title, bank, banksTotal, banksLoaded++);
            } else {
                throw 'missing kanji bank file';
            }
        }
    }
}