merge upstream

packages/frontend/src/utility/check-word-mute.ts

@@ -0,0 +1,65 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import * as Misskey from 'misskey-js';
+
+export function checkWordMute(note: Misskey.entities.Note, me: Misskey.entities.UserLite | null | undefined, mutedWords: Array<string | string[]>): Array<string | string[]> | false {
+	// 自分自身
+	if (me && (note.userId === me.id)) return false;
+
+	if (mutedWords.length > 0) {
+		const text = getNoteText(note);
+
+		if (text === '') return false;
+
+		const matched = mutedWords.filter(filter => {
+			if (Array.isArray(filter)) {
+				// Clean up
+				const filteredFilter = filter.filter(keyword => keyword !== '');
+				if (filteredFilter.length === 0) return false;
+
+				return filteredFilter.every(keyword => text.includes(keyword));
+			} else {
+				// represents RegExp
+				const regexp = filter.match(/^\/(.+)\/(.*)$/);
+
+				// This should never happen due to input sanitisation.
+				if (!regexp) return false;
+
+				try {
+					return new RegExp(regexp[1], regexp[2]).test(text);
+				} catch (err) {
+					// This should never happen due to input sanitisation.
+					return false;
+				}
+			}
+		});
+
+		if (matched.length > 0) return matched;
+	}
+
+	return false;
+}
+
+function getNoteText(note: Note): string {
+	const textParts: string[] = [];
+
+	if (note.cw) textParts.push(note.cw);
+
+	if (note.text) textParts.push(note.text);
+
+	if (note.files) {
+		for (const file of note.files) {
+			if (file.comment) textParts.push(file.comment);
+		}
+	}
+
+	if (note.poll) {
+		for (const choice of note.poll.choices) {
+			if (choice.text) textParts.push(choice.text);
+		}
+	}
+
+	return textParts.join('\n').trim();
+}