センシティブワードを正規表現、CWにも適用するように (#10688)

* cwにセンシティブが効いてない

* CWが無いときにTextを見るように

* 比較演算子間違えた

* とりあえずチェック

* 正規表現対応

* /test/giにも対応

* matchでしなくてもいいのでは感

* レビュー修正

* Update packages/backend/src/core/NoteCreateService.ts

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>

* Update packages/backend/src/core/NoteCreateService.ts

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>

* 修正

* wipかも

* wordsでスペース区切りのものできたかも

* なんか動いたかも

* test作成

* 文言の修正

* 修正

* note参照

---------

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>

packages/backend/src/core/NoteCreateService.ts

@@ -3,6 +3,7 @@ import * as mfm from 'mfm-js';
 import { In, DataSource } from 'typeorm';
 import * as Redis from 'ioredis';
 import { Inject, Injectable, OnApplicationShutdown } from '@nestjs/common';
+import RE2 from 're2';
 import { extractMentions } from '@/misc/extract-mentions.js';
 import { extractCustomEmojisFromMfm } from '@/misc/extract-custom-emojis-from-mfm.js';
 import { extractHashtags } from '@/misc/extract-hashtags.js';
@@ -238,7 +239,8 @@ export class NoteCreateService implements OnApplicationShutdown {
 		if (data.channel != null) data.localOnly = true;
 
 		if (data.visibility === 'public' && data.channel == null) {
-			if ((data.text != null) && (await this.metaService.fetch()).sensitiveWords.some(w => data.text!.includes(w))) {
+			const sensitiveWords = (await this.metaService.fetch()).sensitiveWords;
+			if (this.isSensitive(data, sensitiveWords)) {
 				data.visibility = 'home';
 			} else if ((await this.roleService.getUserPolicies(user.id)).canPublicNote === false) {
 				data.visibility = 'home';
@@ -670,6 +672,31 @@ export class NoteCreateService implements OnApplicationShutdown {
 		// Register to search database
 		this.index(note);
 	}
+	
+	@bindThis
+	private isSensitive(note: Option, sensitiveWord: string[]): boolean {
+		if (sensitiveWord.length > 0) {
+			const text = note.cw ?? note.text ?? '';
+			if (text === '') return false;
+			const matched = sensitiveWord.some(filter => {
+				// represents RegExp
+				const regexp = filter.match(/^\/(.+)\/(.*)$/);
+				// This should never happen due to input sanitisation.
+				if (!regexp) {
+					const words = filter.split(' ');
+					return words.every(keyword => text.includes(keyword));
+				}
+				try {
+					return new RE2(regexp[1], regexp[2]).test(text);
+				} catch (err) {
+					// This should never happen due to input sanitisation.
+					return false;
+				}
+			});
+			if (matched) return true;
+		}
+		return false;
+	}
 
 	@bindThis
 	private incRenoteCount(renote: Note) {