redactEvent method
Strips all information out of an event which isn't critical to the integrity of the server-side representation of the room.
This cannot be undone.
Any user with a power level greater than or equal to the m.room.redaction
event power level may send redaction events in the room. If the user's power
level greater is also greater than or equal to the redact power level
of the room, the user may redact events sent by other users.
Server administrators may redact events sent by users on their server.
roomId The room from which to redact the event.
eventId The ID of the event to redact
txnId The transaction ID for this event. Clients should generate a
unique ID; it will be used by the server to ensure idempotency of requests.
reason The reason for the event being redacted.
returns event_id:
A unique identifier for the event.
Implementation
Future<String?> redactEvent(String roomId, String eventId, String txnId,
{String? reason}) async {
final requestUri = Uri(
path:
'_api/client/v3/rooms/${Uri.encodeComponent(roomId)}/redact/${Uri.encodeComponent(eventId)}/${Uri.encodeComponent(txnId)}');
final request = Request('PUT', baseUri!.resolveUri(requestUri));
request.headers['authorization'] = 'Bearer ${bearerToken!}';
request.headers['content-type'] = 'application/json';
request.bodyBytes = utf8.encode(jsonEncode({
if (reason != null) 'reason': reason,
}));
final response = await httpClient.send(request);
final responseBody = await response.stream.toBytes();
if (response.statusCode != 200) unexpectedResponse(response, responseBody);
final responseString = utf8.decode(responseBody);
final json = jsonDecode(responseString);
return ((v) => v != null ? v as String : null)(json['event_id']);
}