yomichan/ext/bg/js/translator.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 Translator {
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constructor() {
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this.database = null;
this.deinflector = null;
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}
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async prepare() {
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if (!this.database) {
this.database = new Database();
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await this.database.prepare();
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}
if (!this.deinflector) {
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const url = chrome.extension.getURL('/bg/lang/deinflect.json');
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const reasons = await requestJson(url, 'GET');
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this.deinflector = new Deinflector(reasons);
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}
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}
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async findTermsGrouped(text, dictionaries, alphanumeric) {
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const titles = Object.keys(dictionaries);
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const {length, definitions} = await this.findTerms(text, dictionaries, alphanumeric);
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const definitionsGrouped = dictTermsGroup(definitions, dictionaries);
for (const definition of definitionsGrouped) {
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await this.buildTermFrequencies(definition, titles);
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}
return {length, definitions: definitionsGrouped};
}
async findTermsSplit(text, dictionaries, alphanumeric) {
const titles = Object.keys(dictionaries);
const {length, definitions} = await this.findTerms(text, dictionaries, alphanumeric);
for (const definition of definitions) {
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await this.buildTermFrequencies(definition, titles);
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}
return {length, definitions};
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}
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async findTerms(text, dictionaries, alphanumeric) {
if (!alphanumeric && text.length > 0) {
const c = text[0];
if (!jpIsKana(c) && !jpIsKanji(c)) {
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return {length: 0, definitions: []};
}
}
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const cache = {};
const titles = Object.keys(dictionaries);
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let deinflections = await this.findTermDeinflections(text, titles, cache);
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const textHiragana = jpKatakanaToHiragana(text);
if (text !== textHiragana) {
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deinflections = deinflections.concat(await this.findTermDeinflections(textHiragana, titles, cache));
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}
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let definitions = [];
for (const deinflection of deinflections) {
for (const definition of deinflection.definitions) {
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const tags = await this.expandTags(definition.tags, definition.dictionary);
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tags.push(dictTagBuildSource(definition.dictionary));
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definitions.push({
source: deinflection.source,
reasons: deinflection.reasons,
score: definition.score,
id: definition.id,
dictionary: definition.dictionary,
expression: definition.expression,
reading: definition.reading,
glossary: definition.glossary,
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tags: dictTagsSort(tags)
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});
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}
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}
definitions = dictTermsUndupe(definitions);
definitions = dictTermsSort(definitions, dictionaries);
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let length = 0;
for (const definition of definitions) {
length = Math.max(length, definition.source.length);
}
return {length, definitions};
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}
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async findTermDeinflections(text, titles, cache) {
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const definer = async term => {
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if (cache.hasOwnProperty(term)) {
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return cache[term];
} else {
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return cache[term] = await this.database.findTerms(term, titles);
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}
};
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let deinflections = [];
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for (let i = text.length; i > 0; --i) {
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const textSlice = text.slice(0, i);
deinflections = deinflections.concat(await this.deinflector.deinflect(textSlice, definer));
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}
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return deinflections;
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}
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async findKanji(text, dictionaries) {
let definitions = [];
const processed = {};
const titles = Object.keys(dictionaries);
for (const c of text) {
if (!processed[c]) {
definitions = definitions.concat(await this.database.findKanji(c, titles));
processed[c] = true;
}
}
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for (const definition of definitions) {
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const tags = await this.expandTags(definition.tags, definition.dictionary);
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tags.push(dictTagBuildSource(definition.dictionary));
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definition.tags = dictTagsSort(tags);
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definition.stats = await this.expandStats(definition.stats, definition.dictionary);
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definition.frequencies = [];
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for (const meta of await this.database.findKanjiMeta(definition.character, titles)) {
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if (meta.mode === 'freq') {
definition.frequencies.push({
character: meta.character,
frequency: meta.data,
dictionary: meta.dictionary
});
}
}
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}
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return definitions;
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}
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async buildTermFrequencies(definition, titles) {
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definition.frequencies = [];
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for (const meta of await this.database.findTermMeta(definition.expression, titles)) {
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if (meta.mode === 'freq') {
definition.frequencies.push({
expression: meta.expression,
frequency: meta.data,
dictionary: meta.dictionary
});
}
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}
}
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async expandTags(names, title) {
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const tags = [];
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for (const name of names) {
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const base = name.split(':')[0];
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const meta = await this.database.findTagForTitle(base, title);
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const tag = {name};
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for (const prop in meta || {}) {
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if (prop !== 'name') {
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tag[prop] = meta[prop];
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}
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}
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tags.push(dictTagSanitize(tag));
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}
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return tags;
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}
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async expandStats(items, title) {
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const stats = {};
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for (const name in items) {
const base = name.split(':')[0];
const meta = await this.database.findTagForTitle(base, title);
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const group = stats[meta.category] = stats[meta.category] || [];
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const stat = {name, value: items[name]};
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for (const prop in meta || {}) {
if (prop !== 'name') {
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stat[prop] = meta[prop];
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}
}
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group.push(dictTagSanitize(stat));
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}
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for (const category in stats) {
stats[category].sort((a, b) => {
if (a.notes < b.notes) {
return -1;
} else if (a.notes > b.notes) {
return 1;
} else {
return 0;
}
});
}
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return stats;
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}
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}