1 files changed, 37 insertions, 0 deletions
diff --git a/packages/frontend/src/scripts/check-word-mute.ts b/packages/frontend/src/scripts/check-word-mute.ts
new file mode 100644
index 0000000000..35d40a6e08
--- /dev/null
+++ b/packages/frontend/src/scripts/check-word-mute.ts
@@ -0,0 +1,37 @@
+export function checkWordMute(note: Record<string, any>, me: Record<string, any> | null | undefined, mutedWords: Array<string | string[]>): boolean {
+	// 自分自身
+	if (me && (note.userId === me.id)) return false;
+
+	if (mutedWords.length > 0) {
+		const text = ((note.cw ?? '') + '\n' + (note.text ?? '')).trim();
+
+		if (text === '') return false;
+
+		const matched = mutedWords.some(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) return true;
+	}
+
+	return false;
+}