forked from mirror/misskey
wip
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@ -97,6 +97,7 @@
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"accesses": "2.5.0",
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"animejs": "2.0.2",
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"autwh": "0.0.1",
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"bayes": "0.0.7",
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"bcryptjs": "2.4.3",
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"body-parser": "1.17.2",
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"cafy": "2.4.0",
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@ -120,6 +121,7 @@
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"is-root": "1.0.0",
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"is-url": "1.2.2",
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"js-yaml": "3.9.1",
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"mecab-async": "^0.1.0",
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"mongodb": "2.2.31",
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"monk": "6.0.3",
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"morgan": "1.8.2",
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89
src/tools/ai/categorizer.ts
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89
src/tools/ai/categorizer.ts
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@ -0,0 +1,89 @@
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import * as fs from 'fs';
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const bayes = require('bayes');
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const MeCab = require('mecab-async');
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import Post from '../../api/models/post';
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export default class Categorizer {
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classifier: any;
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categorizerDbFilePath: string;
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mecab: any;
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constructor(categorizerDbFilePath: string, mecabCommand: string = 'mecab -d /usr/share/mecab/dic/mecab-ipadic-neologd') {
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this.categorizerDbFilePath = categorizerDbFilePath;
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this.mecab = new MeCab();
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this.mecab.command = mecabCommand;
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// BIND -----------------------------------
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this.tokenizer = this.tokenizer.bind(this);
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}
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tokenizer(text: string) {
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return this.mecab.wakachiSync(text);
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}
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async init() {
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try {
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const db = fs.readFileSync(this.categorizerDbFilePath, {
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encoding: 'utf8'
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});
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this.classifier = bayes.fromJson(db);
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this.classifier.tokenizer = this.tokenizer;
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} catch(e) {
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this.classifier = bayes({
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tokenizer: this.tokenizer
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});
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// 訓練データ
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const verifiedPosts = await Post.find({
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is_category_verified: true
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});
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// 学習
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verifiedPosts.forEach(post => {
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this.classifier.learn(post.text, post.category);
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});
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this.save();
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}
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}
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async learn(id, category) {
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const post = await Post.findOne({ _id: id });
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Post.update({ _id: id }, {
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$set: {
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category: category,
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is_category_verified: true
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}
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});
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this.classifier.learn(post.text, category);
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this.save();
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}
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async categorize(id) {
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const post = await Post.findOne({ _id: id });
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const category = this.classifier.categorize(post.text);
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Post.update({ _id: id }, {
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$set: {
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category: category
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}
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});
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}
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async test(text) {
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return this.classifier.categorize(text);
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}
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save() {
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fs.writeFileSync(this.categorizerDbFilePath, this.classifier.toJson(), {
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encoding: 'utf8'
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});
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}
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}
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