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    // Copyright 2015-2017 Parity Technologies (UK) Ltd.
    // This file is part of Parity.

    // Parity is free software: you can redistribute it and/or modify
    // it under the terms of the GNU General Public License as published by
    // the Free Software Foundation, either version 3 of the License, or
    // (at your option) any later version.

    // Parity is distributed in the hope that it will be useful,
    // but WITHOUT ANY WARRANTY; without even the implied warranty of
    // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    // GNU General Public License for more details.

    // You should have received a copy of the GNU General Public License
    // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

    //! Net rpc implementation.
    use std::sync::{Arc, Weak};
    use jsonrpc_core::Error;
    use ethsync::SyncProvider;
    use v1::traits::Net;

    /// Net rpc implementation.
    pub struct NetClient<S: ?Sized> where S: SyncProvider {
    	sync: Weak<S>
    }

    impl<S: ?Sized> NetClient<S> where S: SyncProvider {
    	/// Creates new NetClient.
    	pub fn new(sync: &Arc<S>) -> Self {
    		NetClient {
    			sync: Arc::downgrade(sync)
    		}
    	}
    }

    impl<S: ?Sized> Net for NetClient<S> where S: SyncProvider + 'static {
    	fn version(&self) -> Result<String, Error> {
    		Ok(format!("{}", take_weak!(self.sync).status().network_id).to_owned())
    	}

    	fn peer_count(&self) -> Result<String, Error> {
    		Ok(format!("0x{:x}", take_weak!(self.sync).status().num_peers as u64).to_owned())
    	}

    	fn is_listening(&self) -> Result<bool, Error> {
    		// right now (11 march 2016), we are always listening for incoming connections
    		//
    		// (this may not be true now -- 26 september 2016)
    		Ok(true)
    	}

    }

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