yomichan/ext/bg/js/translator.js

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/*
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* Copyright (C) 2016-2020 Alex Yatskov <alex@foosoft.net>
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* 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
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/*global requestJson
dictTermsMergeBySequence, dictTagBuildSource, dictTermsMergeByGloss, dictTermsSort, dictTagsSort
dictEnabledSet, dictTermsGroup, dictTermsCompressTags, dictTermsUndupe, dictTagSanitize
jpDistributeFurigana, jpConvertHalfWidthKanaToFullWidth, jpConvertNumericTofullWidth
jpConvertAlphabeticToKana, jpHiraganaToKatakana, jpKatakanaToHiragana, jpIsCharCodeJapanese
Database, Deinflector*/
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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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this.tagCache = new Map();
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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) {
const url = chrome.runtime.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 purgeDatabase() {
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this.tagCache.clear();
await this.database.purge();
}
async deleteDictionary(dictionaryName) {
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this.tagCache.clear();
await this.database.deleteDictionary(dictionaryName);
}
async getSequencedDefinitions(definitions, mainDictionary) {
const [definitionsBySequence, defaultDefinitions] = dictTermsMergeBySequence(definitions, mainDictionary);
const sequenceList = [];
const sequencedDefinitions = [];
for (const [key, value] of definitionsBySequence.entries()) {
sequenceList.push(key);
sequencedDefinitions.push({definitions: value, rawDefinitions: []});
}
for (const definition of await this.database.findTermsBySequenceBulk(sequenceList, mainDictionary)) {
sequencedDefinitions[definition.index].rawDefinitions.push(definition);
}
return {sequencedDefinitions, defaultDefinitions};
}
async getMergedSecondarySearchResults(text, expressionsMap, secondarySearchDictionaries) {
if (secondarySearchDictionaries.length === 0) {
return [];
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}
const expressionList = [];
const readingList = [];
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for (const expression of expressionsMap.keys()) {
if (expression === text) { continue; }
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for (const reading of expressionsMap.get(expression).keys()) {
expressionList.push(expression);
readingList.push(reading);
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}
}
const definitions = await this.database.findTermsExactBulk(expressionList, readingList, secondarySearchDictionaries);
for (const definition of definitions) {
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;
}
if (definitions.length > 1) {
definitions.sort((a, b) => a.index - b.index);
}
return definitions;
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}
async getMergedDefinition(text, dictionaries, sequencedDefinition, defaultDefinitions, secondarySearchDictionaries, mergedByTermIndices) {
const result = sequencedDefinition.definitions;
const rawDefinitionsBySequence = sequencedDefinition.rawDefinitions;
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 = await this.getMergedSecondarySearchResults(text, result.expressions, secondarySearchDictionaries);
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dictTermsMergeByGloss(result, defaultDefinitions.concat(secondarySearchResults), definitionsByGloss, mergedByTermIndices);
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for (const definition of definitionsByGloss.values()) {
dictTagsSort(definition.definitionTags);
result.definitions.push(definition);
}
dictTermsSort(result.definitions, dictionaries);
const expressions = [];
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for (const [expression, readingMap] of result.expressions.entries()) {
for (const [reading, termTags] of readingMap.entries()) {
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const score = termTags.map((tag) => tag.score).reduce((p, v) => p + v, 0);
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expressions.push(Translator.createExpression(expression, reading, dictTagsSort(termTags), Translator.scoreToTermFrequency(score)));
}
}
result.expressions = expressions;
result.expression = Array.from(result.expression);
result.reading = Array.from(result.reading);
return result;
}
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async findTerms(mode, text, details, options) {
switch (mode) {
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case 'group':
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return await this.findTermsGrouped(text, details, options);
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case 'merge':
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return await this.findTermsMerged(text, details, options);
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case 'split':
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return await this.findTermsSplit(text, details, options);
case 'simple':
return await this.findTermsSimple(text, details, options);
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default:
return [[], 0];
}
}
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async findTermsGrouped(text, details, options) {
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const dictionaries = dictEnabledSet(options);
const [definitions, length] = await this.findTermsInternal(text, dictionaries, details, options);
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const definitionsGrouped = dictTermsGroup(definitions, dictionaries);
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await this.buildTermMeta(definitionsGrouped, dictionaries);
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if (options.general.compactTags) {
for (const definition of definitionsGrouped) {
dictTermsCompressTags(definition.definitions);
}
}
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return [definitionsGrouped, length];
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}
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async findTermsMerged(text, details, options) {
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const dictionaries = dictEnabledSet(options);
const secondarySearchDictionaries = new Map();
for (const [title, dictionary] of dictionaries.entries()) {
if (!dictionary.allowSecondarySearches) { continue; }
secondarySearchDictionaries.set(title, dictionary);
}
const [definitions, length] = await this.findTermsInternal(text, dictionaries, details, options);
const {sequencedDefinitions, defaultDefinitions} = await this.getSequencedDefinitions(definitions, options.general.mainDictionary);
const definitionsMerged = [];
const mergedByTermIndices = new Set();
for (const sequencedDefinition of sequencedDefinitions) {
const result = await this.getMergedDefinition(
text,
dictionaries,
sequencedDefinition,
defaultDefinitions,
secondarySearchDictionaries,
mergedByTermIndices
);
definitionsMerged.push(result);
}
const strayDefinitions = defaultDefinitions.filter((definition, index) => !mergedByTermIndices.has(index));
for (const groupedDefinition of dictTermsGroup(strayDefinitions, dictionaries)) {
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groupedDefinition.expressions = [Translator.createExpression(groupedDefinition.expression, groupedDefinition.reading)];
definitionsMerged.push(groupedDefinition);
}
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await this.buildTermMeta(definitionsMerged, dictionaries);
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if (options.general.compactTags) {
for (const definition of definitionsMerged) {
dictTermsCompressTags(definition.definitions);
}
}
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return [dictTermsSort(definitionsMerged), length];
}
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async findTermsSplit(text, details, options) {
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const dictionaries = dictEnabledSet(options);
const [definitions, length] = await this.findTermsInternal(text, dictionaries, details, options);
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await this.buildTermMeta(definitions, dictionaries);
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return [definitions, length];
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}
async findTermsSimple(text, details, options) {
const dictionaries = dictEnabledSet(options);
return await this.findTermsInternal(text, dictionaries, details, options);
}
async findTermsInternal(text, dictionaries, details, options) {
text = Translator.getSearchableText(text, options);
if (text.length === 0) {
return [[], 0];
}
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const deinflections = (
details.wildcard ?
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await this.findTermWildcard(text, dictionaries, details.wildcard) :
await this.findTermDeinflections(text, dictionaries, options)
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);
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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);
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const {expression, reading} = definition;
const furiganaSegments = jpDistributeFurigana(expression, reading);
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definitions.push({
source: deinflection.source,
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rawSource: deinflection.rawSource,
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reasons: deinflection.reasons,
score: definition.score,
id: definition.id,
dictionary: definition.dictionary,
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expression,
reading,
furiganaSegments,
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glossary: definition.glossary,
definitionTags: dictTagsSort(definitionTags),
termTags: dictTagsSort(termTags),
sequence: definition.sequence
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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) {
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length = Math.max(length, definition.rawSource.length);
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}
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return [definitions, length];
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}
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async findTermWildcard(text, dictionaries, wildcard) {
const definitions = await this.database.findTermsBulk([text], dictionaries, wildcard);
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if (definitions.length === 0) {
return [];
}
return [{
source: text,
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rawSource: text,
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term: text,
rules: 0,
definitions,
reasons: []
}];
}
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async findTermDeinflections(text, dictionaries, options) {
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const deinflections = this.getAllDeinflections(text, options);
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if (deinflections.length === 0) {
return [];
}
const uniqueDeinflectionTerms = [];
const uniqueDeinflectionArrays = [];
const uniqueDeinflectionsMap = new Map();
for (const deinflection of deinflections) {
const term = deinflection.term;
let deinflectionArray = uniqueDeinflectionsMap.get(term);
if (typeof deinflectionArray === 'undefined') {
deinflectionArray = [];
uniqueDeinflectionTerms.push(term);
uniqueDeinflectionArrays.push(deinflectionArray);
uniqueDeinflectionsMap.set(term, deinflectionArray);
}
deinflectionArray.push(deinflection);
}
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const definitions = await this.database.findTermsBulk(uniqueDeinflectionTerms, dictionaries, null);
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for (const definition of definitions) {
const definitionRules = Deinflector.rulesToRuleFlags(definition.rules);
for (const deinflection of uniqueDeinflectionArrays[definition.index]) {
const deinflectionRules = deinflection.rules;
if (deinflectionRules === 0 || (definitionRules & deinflectionRules) !== 0) {
deinflection.definitions.push(definition);
}
}
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}
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return deinflections.filter((e) => e.definitions.length > 0);
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}
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getAllDeinflections(text, options) {
const translationOptions = options.translation;
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const textOptionVariantArray = [
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Translator.getTextOptionEntryVariants(translationOptions.convertHalfWidthCharacters),
Translator.getTextOptionEntryVariants(translationOptions.convertNumericCharacters),
Translator.getTextOptionEntryVariants(translationOptions.convertAlphabeticCharacters),
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Translator.getTextOptionEntryVariants(translationOptions.convertHiraganaToKatakana),
Translator.getTextOptionEntryVariants(translationOptions.convertKatakanaToHiragana)
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];
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const deinflections = [];
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const used = new Set();
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for (const [halfWidth, numeric, alphabetic, katakana, hiragana] of Translator.getArrayVariants(textOptionVariantArray)) {
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let text2 = text;
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let sourceMapping = null;
if (halfWidth) {
if (sourceMapping === null) { sourceMapping = Translator.createTextSourceMapping(text2); }
text2 = jpConvertHalfWidthKanaToFullWidth(text2, sourceMapping);
}
if (numeric) {
text2 = jpConvertNumericTofullWidth(text2);
}
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if (alphabetic) {
if (sourceMapping === null) { sourceMapping = Translator.createTextSourceMapping(text2); }
text2 = jpConvertAlphabeticToKana(text2, sourceMapping);
}
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if (katakana) {
text2 = jpHiraganaToKatakana(text2);
}
if (hiragana) {
text2 = jpKatakanaToHiragana(text2);
}
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for (let i = text2.length; i > 0; --i) {
const text2Substring = text2.substring(0, i);
if (used.has(text2Substring)) { break; }
used.add(text2Substring);
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for (const deinflection of this.deinflector.deinflect(text2Substring)) {
deinflection.rawSource = Translator.getDeinflectionRawSource(text, i, sourceMapping);
deinflections.push(deinflection);
}
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}
}
return deinflections;
}
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static getTextOptionEntryVariants(value) {
switch (value) {
case 'true': return [true];
case 'variant': return [false, true];
default: return [false];
}
}
static getDeinflectionRawSource(source, length, sourceMapping) {
if (sourceMapping === null) {
return source.substring(0, length);
}
let result = '';
let index = 0;
for (let i = 0; i < length; ++i) {
const c = sourceMapping[i];
result += source.substring(index, index + c);
index += c;
}
return result;
}
static createTextSourceMapping(text) {
return new Array(text.length).fill(1);
}
async findKanji(text, options) {
const dictionaries = dictEnabledSet(options);
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const kanjiUnique = new Set();
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for (const c of text) {
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kanjiUnique.add(c);
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}
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const definitions = await this.database.findKanjiBulk([...kanjiUnique], dictionaries);
if (definitions.length === 0) {
return definitions;
}
if (definitions.length > 1) {
definitions.sort((a, b) => a.index - b.index);
}
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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));
dictTagsSort(tags);
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const stats = await this.expandStats(definition.stats, definition.dictionary);
definition.tags = tags;
definition.stats = stats;
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}
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await this.buildKanjiMeta(definitions, dictionaries);
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return definitions;
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}
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async buildTermMeta(definitions, dictionaries) {
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const terms = [];
for (const definition of definitions) {
if (definition.expressions) {
terms.push(...definition.expressions);
} else {
terms.push(definition);
}
}
if (terms.length === 0) {
return;
}
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// Create mapping of unique terms
const expressionsUnique = [];
const termsUnique = [];
const termsUniqueMap = new Map();
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for (let i = 0, ii = terms.length; i < ii; ++i) {
const term = terms[i];
const expression = term.expression;
let termList = termsUniqueMap.get(expression);
if (typeof termList === 'undefined') {
termList = [];
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expressionsUnique.push(expression);
termsUnique.push(termList);
termsUniqueMap.set(expression, termList);
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}
termList.push(term);
// New data
term.frequencies = [];
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}
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const metas = await this.database.findTermMetaBulk(expressionsUnique, dictionaries);
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for (const {expression, mode, data, dictionary, index} of metas) {
switch (mode) {
case 'freq':
for (const term of termsUnique[index]) {
term.frequencies.push({expression, frequency: data, dictionary});
}
break;
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}
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}
}
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async buildKanjiMeta(definitions, dictionaries) {
const kanjiList = [];
for (const definition of definitions) {
kanjiList.push(definition.character);
definition.frequencies = [];
}
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const metas = await this.database.findKanjiMetaBulk(kanjiList, dictionaries);
for (const {character, mode, data, dictionary, index} of metas) {
switch (mode) {
case 'freq':
definitions[index].frequencies.push({character, frequency: data, dictionary});
break;
}
}
}
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async expandTags(names, title) {
const tagMetaList = await this.getTagMetaList(names, title);
return tagMetaList.map((meta, index) => {
const name = names[index];
const tag = dictTagSanitize(Object.assign({}, meta !== null ? meta : {}, {name}));
return dictTagSanitize(tag);
});
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}
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async expandStats(items, title) {
const names = Object.keys(items);
const tagMetaList = await this.getTagMetaList(names, title);
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const statsGroups = new Map();
for (let i = 0; i < names.length; ++i) {
const name = names[i];
const meta = tagMetaList[i];
if (meta === null) { continue; }
const category = meta.category;
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let group = statsGroups.get(category);
if (typeof group === 'undefined') {
group = [];
statsGroups.set(category, group);
}
const stat = Object.assign({}, meta, {name, value: items[name]});
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group.push(dictTagSanitize(stat));
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}
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const stats = {};
const sortCompare = (a, b) => a.notes - b.notes;
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for (const [category, group] of statsGroups.entries()) {
group.sort(sortCompare);
stats[category] = group;
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}
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return stats;
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}
async getTagMetaList(names, title) {
const tagMetaList = [];
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let cache = this.tagCache.get(title);
if (typeof cache === 'undefined') {
cache = new Map();
this.tagCache.set(title, cache);
}
for (const name of names) {
const base = Translator.getNameBase(name);
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let tagMeta = cache.get(base);
if (typeof tagMeta === 'undefined') {
tagMeta = await this.database.findTagForTitle(base, title);
cache.set(base, tagMeta);
}
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tagMetaList.push(tagMeta);
}
return tagMetaList;
}
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static createExpression(expression, reading, termTags=null, termFrequency=null) {
const furiganaSegments = jpDistributeFurigana(expression, reading);
return {
expression,
reading,
furiganaSegments,
termTags,
termFrequency
};
}
static scoreToTermFrequency(score) {
if (score > 0) {
return 'popular';
} else if (score < 0) {
return 'rare';
} else {
return 'normal';
}
}
static getNameBase(name) {
const pos = name.indexOf(':');
return (pos >= 0 ? name.substring(0, pos) : name);
}
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static *getArrayVariants(arrayVariants) {
const ii = arrayVariants.length;
let total = 1;
for (let i = 0; i < ii; ++i) {
total *= arrayVariants[i].length;
}
for (let a = 0; a < total; ++a) {
const variant = [];
let index = a;
for (let i = 0; i < ii; ++i) {
const entryVariants = arrayVariants[i];
variant.push(entryVariants[index % entryVariants.length]);
index = Math.floor(index / entryVariants.length);
}
yield variant;
}
}
static getSearchableText(text, options) {
if (!options.scanning.alphanumeric) {
const ii = text.length;
for (let i = 0; i < ii; ++i) {
if (!jpIsCharCodeJapanese(text.charCodeAt(i))) {
text = text.substring(0, i);
break;
}
}
}
return text;
}
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}