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// Copyright 2023 The RocketMQ Rust Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::collections::HashMap;
use std::sync::Arc;
use cheetah_string::CheetahString;
use crate::consume_queue::cq_ext_unit::CqExtUnit;
/// A trait for filtering messages.
pub trait MessageFilter: Send + Sync {
/// Checks if the message is matched by the consume queue.
///
/// # Arguments
///
/// * `tags_code` - An optional tag code.
/// * `cq_ext_unit` - An optional reference to a `CqExtUnit`.
///
/// # Returns
///
/// * `true` if the message is matched, `false` otherwise.
fn is_matched_by_consume_queue(&self, tags_code: Option<i64>, cq_ext_unit: Option<&CqExtUnit>) -> bool;
/// Checks if the message is matched by the commit log.
///
/// # Arguments
///
/// * `msg_buffer` - An optional mutable reference to a message buffer.
/// * `properties` - An optional reference to a map of properties.
///
/// # Returns
///
/// * `true` if the message is matched, `false` otherwise.
fn is_matched_by_commit_log(
&self,
msg_buffer: Option<&[u8]>,
properties: Option<&HashMap<CheetahString, CheetahString>>,
) -> bool;
}
/// Type alias for an atomically reference-counted message filter.
///
/// This is the standard way to share a [`MessageFilter`] implementation across multiple
/// threads or components. The `Arc` provides thread-safe reference counting.
pub type ArcMessageFilter = Arc<dyn MessageFilter>;