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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) {
return validator(this.term).then(sets => {
for (const tags of sets) {
if (this.tags.length === 0) {
return true;
}
for (const tag of this.tags) {
if (tags.includes(tag)) {
return true;
}
}
}
return false;
});
}
deinflect(validator, rules) {
const promises = [
this.validate(validator).then(valid => {
const child = new Deinflection(this.term, this.tags);
this.children.push(child);
})
];
for (const rule in rules) {
for (const variant of rules[rule]) {
let allowed = this.tags.length === 0;
for (const tag of this.tags) {
if (variant.tagsIn.includes(tag)) {
allowed = true;
break;
}
}
if (!allowed || !this.term.endsWith(variant.kanaIn)) {
continue;
}
const term = this.term.slice(0, -variant.kanaIn.length) + variant.kanaOut;
if (term.length === 0) {
continue;
}
const child = new Deinflection(term, variant.tagsOut, rule);
promises.push(
child.deinflect(validator, rules).then(valid => {
if (valid) {
this.children.push(child);
}
}
));
}
}
return Promise.all(promises).then(() => {
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);
return node.deinflect(validator, this.rules).then(success => success ? node.gather() : []);
}
}
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