merge: Add pattern checker for word mutes (resolves #1003) (!1020)

View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/1020

Closes #1003

Approved-by: dakkar <dakkar@thenautilus.net>
Approved-by: Marie <github@yuugi.dev>

1 files changed, 41 insertions, 0 deletions

diff --git a/packages/frontend/src/utility/parse-mutes.ts b/packages/frontend/src/utility/parse-mutes.ts
new file mode 100644
index 0000000000..1ebd5bcf83
--- /dev/null
+++ b/packages/frontend/src/utility/parse-mutes.ts
@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import * as os from '@/os';
+import { i18n } from '@/i18n';
+
+export type Mutes = (string | string[])[];
+
+export function parseMutes(mutes: string): Mutes {
+	// split into lines, remove empty lines and unnecessary whitespace
+	const lines = mutes.trim().split('\n').map(line => line.trim()).filter(line => line !== '');
+	const outLines: Mutes = Array.from(lines);
+
+	// check each line if it is a RegExp or not
+	for (let i = 0; i < lines.length; i++) {
+		const line = lines[i];
+		const regexp = line.match(/^\/(.+)\/(.*)$/);
+		if (regexp) {
+			// check that the RegExp is valid
+			try {
+				new RegExp(regexp[1], regexp[2]);
+				// note that regex lines will not be split by spaces!
+			} catch (err: any) {
+				// invalid syntax: do not save, do not reset changed flag
+				os.alert({
+					type: 'error',
+					title: i18n.ts.regexpError,
+					text: i18n.tsx.regexpErrorDescription({ tab: 'word mute', line: i + 1 }) + '\n' + err.toString(),
+				});
+				// re-throw error so these invalid settings are not saved
+				throw err;
+			}
+		} else {
+			outLines[i] = line.split(' ');
+		}
+	}
+
+	return outLines;
+}