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/*
* Copyright (C) 2024 Yomitan Authors
*
* 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 <https://www.gnu.org/licenses/>.
*/
import {readFileSync} from 'fs';
import {join, dirname as pathDirname} from 'path';
import {fileURLToPath} from 'url';
import {describe, test} from 'vitest';
import {parseJson} from '../dev/json.js';
import {LanguageTransformer} from '../ext/js/language/language-transformer.js';
import {getLanguageSummaries} from '../ext/js/language/languages.js';
class DeinflectionNode {
/**
* @param {string} text
* @param {string[]} ruleNames
* @param {?RuleNode} ruleNode
* @param {?DeinflectionNode} previous
*/
constructor(text, ruleNames, ruleNode, previous) {
/** @type {string} */
this.text = text;
/** @type {string[]} */
this.ruleNames = ruleNames;
/** @type {?RuleNode} */
this.ruleNode = ruleNode;
/** @type {?DeinflectionNode} */
this.previous = previous;
}
/**
* @param {DeinflectionNode} other
* @returns {boolean}
*/
historyIncludes(other) {
/** @type {?DeinflectionNode} */
// eslint-disable-next-line @typescript-eslint/no-this-alias
let node = this;
for (; node !== null; node = node.previous) {
if (
node.ruleNode === other.ruleNode &&
node.text === other.text &&
arraysAreEqual(node.ruleNames, other.ruleNames)
) {
return true;
}
}
return false;
}
/**
* @returns {DeinflectionNode[]}
*/
getHistory() {
/** @type {DeinflectionNode[]} */
const results = [];
/** @type {?DeinflectionNode} */
// eslint-disable-next-line @typescript-eslint/no-this-alias
let node = this;
for (; node !== null; node = node.previous) {
results.unshift(node);
}
return results;
}
}
class RuleNode {
/**
* @param {string} groupName
* @param {import('language-transformer').Rule} rule
*/
constructor(groupName, rule) {
/** @type {string} */
this.groupName = groupName;
/** @type {import('language-transformer').Rule} */
this.rule = rule;
}
}
/**
* @template [T=unknown]
* @param {T[]} rules1
* @param {T[]} rules2
* @returns {boolean}
*/
function arraysAreEqual(rules1, rules2) {
if (rules1.length !== rules2.length) { return false; }
for (const rule1 of rules1) {
if (!rules2.includes(rule1)) { return false; }
}
return true;
}
const dirname = pathDirname(fileURLToPath(import.meta.url));
const descriptors = [];
const languageSummaries = getLanguageSummaries();
for (const {languageTransformsFile} of languageSummaries) {
if (!languageTransformsFile) { continue; }
/** @type {import('language-transformer').LanguageTransformDescriptor} */
const descriptor = parseJson(readFileSync(join(dirname, `../ext/${languageTransformsFile}`), {encoding: 'utf8'}));
descriptors.push(descriptor);
}
describe.each(descriptors)('Cycles Test $language', (descriptor) => {
test('Check for cycles', ({expect}) => {
const languageTransformer = new LanguageTransformer();
languageTransformer.addDescriptor(descriptor);
/** @type {RuleNode[]} */
const ruleNodes = [];
for (const [groupName, reasonInfo] of Object.entries(descriptor.transforms)) {
for (const rule of reasonInfo.rules) {
ruleNodes.push(new RuleNode(groupName, rule));
}
}
/** @type {DeinflectionNode[]} */
const deinflectionNodes = [];
for (const ruleNode of ruleNodes) {
deinflectionNodes.push(new DeinflectionNode(`?${ruleNode.rule.suffixIn}`, [], null, null));
}
for (let i = 0; i < deinflectionNodes.length; ++i) {
const deinflectionNode = deinflectionNodes[i];
const {text, ruleNames} = deinflectionNode;
for (const ruleNode of ruleNodes) {
const {suffixIn, suffixOut, conditionsIn, conditionsOut} = ruleNode.rule;
if (
!LanguageTransformer.conditionsMatch(
languageTransformer.getConditionFlagsFromConditionTypes(ruleNames),
languageTransformer.getConditionFlagsFromConditionTypes(conditionsIn)
) ||
!text.endsWith(suffixIn) ||
(text.length - suffixIn.length + suffixOut.length) <= 0
) {
continue;
}
const newDeinflectionNode = new DeinflectionNode(
text.substring(0, text.length - suffixIn.length) + suffixOut,
conditionsOut,
ruleNode,
deinflectionNode
);
// Cycle check
if (deinflectionNode.historyIncludes(newDeinflectionNode)) {
const stack = [];
for (const item of newDeinflectionNode.getHistory()) {
stack.push(
item.ruleNode === null ?
`${item.text} (start)` :
`${item.text} (${item.ruleNode.groupName}, ${item.ruleNode.rule.conditionsIn.join(',')}=>${item.ruleNode.rule.conditionsOut.join(',')}, ${item.ruleNode.rule.suffixIn}=>${item.ruleNode.rule.suffixOut})`
);
}
const message = `Cycle detected:\n ${stack.join('\n ')}`;
expect.soft(true, message).toEqual(false);
continue;
}
deinflectionNodes.push(newDeinflectionNode);
}
}
});
});
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