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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, {rules=[], definitions=[], reason=''} = {}) {
this.term = term;
this.rules = rules;
this.definitions = definitions;
this.reason = reason;
this.children = [];
}
deinflect(definer, reasons) {
const define = () => {
return definer(this.term).then(definitions => {
if (this.rules.length === 0) {
this.definitions = definitions;
} else {
for (const rule of this.rules) {
for (const definition of definitions) {
if (definition.rules.includes(rule)) {
this.definitions.push(definition);
}
}
}
}
return this.definitions.length > 0;
});
};
const promises = [];
for (const reason in reasons) {
for (const variant of reasons[reason]) {
let accept = this.rules.length === 0;
if (!accept) {
for (const rule of this.rules) {
if (variant.rulesIn.includes(rule)) {
accept = true;
break;
}
}
}
if (!accept || !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, {reason, rules: variant.rulesOut});
promises.push(
child.deinflect(definer, reasons).then(valid => valid && this.children.push(child))
);
}
}
return Promise.all(promises).then(define).then(valid => {
if (valid && this.children.length > 0) {
const child = new Deinflection(this.term, {rules: this.rules, definitions: this.definitions});
this.children.push(child);
}
return valid || this.children.length > 0;
});
}
gather() {
if (this.children.length === 0) {
return [{
source: this.term,
rules: this.rules,
definitions: this.definitions,
reasons: this.reason.length > 0 ? [this.reason] : []
}];
}
const results = [];
for (const child of this.children) {
for (const result of child.gather()) {
if (this.reason.length > 0) {
result.reasons.push(this.reason);
}
result.source = this.term;
results.push(result);
}
}
return results;
}
}
class Deinflector {
constructor() {
this.reasons = {};
}
setReasons(reasons) {
this.reasons = reasons;
}
deinflect(term, definer) {
const node = new Deinflection(term);
return node.deinflect(definer, this.reasons).then(success => success ? node.gather() : []);
}
}
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