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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/>.
*/
class Deinflection {
constructor(term, tags=[], rule='') {
this.children = [];
this.term = term;
this.tags = tags;
this.rule = rule;
}
validate(validator) {
for (const tags of validator(this.term)) {
if (this.tags.length === 0) {
return true;
}
for (const tag of this.tags) {
if (tags.indexOf(tag) !== -1) {
return true;
}
}
}
return false;
}
deinflect(validator, rules) {
if (this.validate(validator)) {
const child = new Deinflection(this.term, this.tags);
this.children.push(child);
}
for (const rule in rules) {
const variants = rules[rule];
for (const v of variants) {
let allowed = this.tags.length === 0;
for (const tag of this.tags) {
if (v.tagsIn.indexOf(tag) !== -1) {
allowed = true;
break;
}
}
if (!allowed || !this.term.endsWith(v.kanaIn)) {
continue;
}
const term = this.term.slice(0, -v.kanaIn.length) + v.kanaOut;
const child = new Deinflection(term, v.tagsOut, rule);
if (child.deinflect(validator, rules)) {
this.children.push(child);
}
}
}
return this.children.length > 0;
}
gather() {
if (this.children.length === 0) {
return [{root: this.term, tags: this.tags, rules: []}];
}
const paths = [];
for (const child of this.children) {
for (const path of child.gather()) {
if (this.rule.length > 0) {
path.rules.push(this.rule);
}
path.source = this.term;
paths.push(path);
}
}
return paths;
}
}
class Deinflector {
constructor() {
this.rules = {};
}
setRules(rules) {
this.rules = rules;
}
deinflect(term, validator) {
const node = new Deinflection(term);
if (node.deinflect(validator, this.rules)) {
return node.gather();
}
return null;
}
}
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