yomichan/ext/bg/js/translator.js
2019-09-30 22:09:16 -04:00

428 lines
16 KiB
JavaScript

/*
* 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 Translator {
constructor() {
this.database = null;
this.deinflector = null;
}
async prepare() {
if (!this.database) {
this.database = new Database();
await this.database.prepare();
}
if (!this.deinflector) {
const url = chrome.extension.getURL('/bg/lang/deinflect.json');
const reasons = await requestJson(url, 'GET');
this.deinflector = new Deinflector(reasons);
}
}
async findTermsGrouped(text, dictionaries, alphanumeric, options) {
const titles = Object.keys(dictionaries);
const {length, definitions} = await this.findTerms(text, dictionaries, alphanumeric);
const definitionsGrouped = dictTermsGroup(definitions, dictionaries);
await this.buildTermFrequencies(definitionsGrouped, titles);
if (options.general.compactTags) {
for (const definition of definitionsGrouped) {
dictTermsCompressTags(definition.definitions);
}
}
return {length, definitions: definitionsGrouped};
}
async findTermsMerged(text, dictionaries, alphanumeric, options) {
const secondarySearchTitles = Object.keys(options.dictionaries).filter(dict => options.dictionaries[dict].allowSecondarySearches);
const titles = Object.keys(dictionaries);
const {length, definitions} = await this.findTerms(text, dictionaries, alphanumeric);
const definitionsBySequence = dictTermsMergeBySequence(definitions, options.general.mainDictionary);
const definitionsMerged = [];
const mergedByTermIndices = new Set();
for (const sequence in definitionsBySequence) {
if (sequence < 0) {
continue;
}
const result = definitionsBySequence[sequence];
const rawDefinitionsBySequence = await this.database.findTermsBySequence(Number(sequence), options.general.mainDictionary);
for (const definition of rawDefinitionsBySequence) {
const definitionTags = await this.expandTags(definition.definitionTags, definition.dictionary);
definitionTags.push(dictTagBuildSource(definition.dictionary));
definition.definitionTags = definitionTags;
const termTags = await this.expandTags(definition.termTags, definition.dictionary);
definition.termTags = termTags;
}
const definitionsByGloss = dictTermsMergeByGloss(result, rawDefinitionsBySequence);
const secondarySearchResults = [];
if (secondarySearchTitles.length > 0) {
for (const expression of result.expressions.keys()) {
if (expression === text) {
continue;
}
for (const reading of result.expressions.get(expression).keys()) {
for (const definition of await this.database.findTermsExact(expression, reading, secondarySearchTitles)) {
const definitionTags = await this.expandTags(definition.definitionTags, definition.dictionary);
definitionTags.push(dictTagBuildSource(definition.dictionary));
definition.definitionTags = definitionTags;
const termTags = await this.expandTags(definition.termTags, definition.dictionary);
definition.termTags = termTags;
secondarySearchResults.push(definition);
}
}
}
}
dictTermsMergeByGloss(result, definitionsBySequence['-1'].concat(secondarySearchResults), definitionsByGloss, mergedByTermIndices);
for (const gloss in definitionsByGloss) {
const definition = definitionsByGloss[gloss];
dictTagsSort(definition.definitionTags);
result.definitions.push(definition);
}
dictTermsSort(result.definitions, dictionaries);
const expressions = [];
for (const expression of result.expressions.keys()) {
for (const reading of result.expressions.get(expression).keys()) {
const termTags = result.expressions.get(expression).get(reading);
expressions.push({
expression: expression,
reading: reading,
termTags: dictTagsSort(termTags),
termFrequency: (score => {
if (score > 0) {
return 'popular';
} else if (score < 0) {
return 'rare';
} else {
return 'normal';
}
})(termTags.map(tag => tag.score).reduce((p, v) => p + v, 0))
});
}
}
result.expressions = expressions;
result.expression = Array.from(result.expression);
result.reading = Array.from(result.reading);
definitionsMerged.push(result);
}
const strayDefinitions = definitionsBySequence['-1'].filter((definition, index) => !mergedByTermIndices.has(index));
for (const groupedDefinition of dictTermsGroup(strayDefinitions, dictionaries)) {
groupedDefinition.expressions = [{expression: groupedDefinition.expression, reading: groupedDefinition.reading}];
definitionsMerged.push(groupedDefinition);
}
await this.buildTermFrequencies(definitionsMerged, titles);
if (options.general.compactTags) {
for (const definition of definitionsMerged) {
dictTermsCompressTags(definition.definitions);
}
}
return {length, definitions: dictTermsSort(definitionsMerged)};
}
async findTermsSplit(text, dictionaries, alphanumeric) {
const titles = Object.keys(dictionaries);
const {length, definitions} = await this.findTerms(text, dictionaries, alphanumeric);
await this.buildTermFrequencies(definitions, titles);
return {length, definitions};
}
async findTerms(text, dictionaries, alphanumeric) {
if (!alphanumeric && text.length > 0) {
const c = text[0];
if (!jpIsKana(c) && !jpIsKanji(c)) {
return {length: 0, definitions: []};
}
}
const textHiragana = jpKatakanaToHiragana(text);
const titles = Object.keys(dictionaries);
const deinflections = await this.findTermDeinflections(text, textHiragana, titles);
let definitions = [];
for (const deinflection of deinflections) {
for (const definition of deinflection.definitions) {
const definitionTags = await this.expandTags(definition.definitionTags, definition.dictionary);
definitionTags.push(dictTagBuildSource(definition.dictionary));
const termTags = await this.expandTags(definition.termTags, definition.dictionary);
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,
definitionTags: dictTagsSort(definitionTags),
termTags: dictTagsSort(termTags),
sequence: definition.sequence
});
}
}
definitions = dictTermsUndupe(definitions);
definitions = dictTermsSort(definitions, dictionaries);
let length = 0;
for (const definition of definitions) {
length = Math.max(length, definition.source.length);
}
return {length, definitions};
}
async findTermDeinflections(text, text2, titles) {
const deinflections = (text === text2 ? this.getDeinflections(text) : this.getDeinflections2(text, text2));
if (deinflections.length === 0) {
return [];
}
const uniqueDeinflectionTerms = [];
const uniqueDeinflectionArrays = [];
const uniqueDeinflectionsMap = {};
for (const deinflection of deinflections) {
const term = deinflection.term;
let deinflectionArray;
if (uniqueDeinflectionsMap.hasOwnProperty(term)) {
deinflectionArray = uniqueDeinflectionsMap[term];
} else {
deinflectionArray = [];
uniqueDeinflectionTerms.push(term);
uniqueDeinflectionArrays.push(deinflectionArray);
uniqueDeinflectionsMap[term] = deinflectionArray;
}
deinflectionArray.push(deinflection);
}
const definitions = await this.database.findTermsBulk(uniqueDeinflectionTerms, titles);
for (const definition of definitions) {
for (const deinflection of uniqueDeinflectionArrays[definition.index]) {
if (Translator.definitionContainsAnyRule(definition, deinflection.rules)) {
deinflection.definitions.push(definition);
}
}
}
return deinflections.filter(e => e.definitions.length > 0);
}
static definitionContainsAnyRule(definition, rules) {
if (rules.length === 0) {
return true;
}
const definitionRules = definition.rules;
for (const rule of rules) {
if (definitionRules.includes(rule)) {
return true;
}
}
return false;
}
getDeinflections(text) {
const deinflections = [];
for (let i = text.length; i > 0; --i) {
const textSlice = text.slice(0, i);
deinflections.push(...this.deinflector.deinflect(textSlice));
}
return deinflections;
}
getDeinflections2(text, text2) {
const deinflections = [];
for (let i = text.length; i > 0; --i) {
const textSlice = text.slice(0, i);
const text2Slice = text2.slice(0, i);
deinflections.push(...this.deinflector.deinflect(textSlice));
if (textSlice !== text2Slice) {
deinflections.push(...this.deinflector.deinflect(text2Slice));
}
}
return deinflections;
}
async findKanji(text, dictionaries) {
let definitions = [];
const processed = {};
const titles = Object.keys(dictionaries);
for (const c of text) {
if (!processed[c]) {
definitions.push(...await this.database.findKanji(c, titles));
processed[c] = true;
}
}
for (const definition of definitions) {
const tags = await this.expandTags(definition.tags, definition.dictionary);
tags.push(dictTagBuildSource(definition.dictionary));
definition.tags = dictTagsSort(tags);
definition.stats = await this.expandStats(definition.stats, definition.dictionary);
definition.frequencies = [];
for (const meta of await this.database.findKanjiMeta(definition.character, titles)) {
if (meta.mode === 'freq') {
definition.frequencies.push({
character: meta.character,
frequency: meta.data,
dictionary: meta.dictionary
});
}
}
}
return definitions;
}
async buildTermFrequencies(definitions, titles) {
const terms = [];
for (const definition of definitions) {
if (definition.expressions) {
terms.push(...definition.expressions);
} else {
terms.push(definition);
}
}
if (terms.length === 0) {
return;
}
// Create mapping of unique terms
const expressionsUnique = [];
const termsUnique = [];
const termsUniqueMap = {};
for (let i = 0, ii = terms.length; i < ii; ++i) {
const term = terms[i];
const expression = term.expression;
term.frequencies = [];
if (termsUniqueMap.hasOwnProperty(expression)) {
termsUniqueMap[expression].push(term);
} else {
const termList = [term];
expressionsUnique.push(expression);
termsUnique.push(termList);
termsUniqueMap[expression] = termList;
}
}
const metas = await this.database.findTermMetaBulk(expressionsUnique, titles);
for (const meta of metas) {
if (meta.mode !== 'freq') {
continue;
}
for (const term of termsUnique[meta.index]) {
term.frequencies.push({
expression: meta.expression,
frequency: meta.data,
dictionary: meta.dictionary
});
}
}
}
async expandTags(names, title) {
const tags = [];
for (const name of names) {
const base = Translator.getNameBase(name);
let meta = this.database.findTagForTitleCached(base, title);
if (typeof meta === 'undefined') {
meta = await this.database.findTagForTitle(base, title);
}
const tag = Object.assign({}, meta !== null ? meta : {}, {name});
tags.push(dictTagSanitize(tag));
}
return tags;
}
async expandStats(items, title) {
const stats = {};
for (const name in items) {
const base = Translator.getNameBase(name);
let meta = this.database.findTagForTitleCached(base, title);
if (typeof meta === 'undefined') {
meta = await this.database.findTagForTitle(base, title);
if (meta === null) {
continue;
}
}
const group = stats[meta.category] = stats[meta.category] || [];
const stat = Object.assign({}, meta, {name, value: items[name]});
group.push(dictTagSanitize(stat));
}
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;
}
});
}
return stats;
}
static getNameBase(name) {
const pos = name.indexOf(':');
return (pos >= 0 ? name.substr(0, pos) : name);
}
}