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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/>.

    use std::env;
    use std::path::PathBuf;
    use {SafeAccount, Error};
    use super::{KeyDirectory, RootDiskDirectory, DirectoryType};

    #[cfg(target_os = "macos")]
    fn geth_dir_path() -> PathBuf {
    	let mut home = env::home_dir().expect("Failed to get home dir");
    	home.push("Library");
    	home.push("Ethereum");
    	home
    }

    #[cfg(windows)]
    /// Default path for ethereum installation on Windows
    pub fn geth_dir_path() -> PathBuf {
    	let mut home = env::home_dir().expect("Failed to get home dir");
    	home.push("AppData");
    	home.push("Roaming");
    	home.push("Ethereum");
    	home
    }

    #[cfg(not(any(target_os = "macos", windows)))]
    /// Default path for ethereum installation on posix system which is not Mac OS
    pub fn geth_dir_path() -> PathBuf {
    	let mut home = env::home_dir().expect("Failed to get home dir");
    	home.push(".ethereum");
    	home
    }

    fn geth_keystore(t: DirectoryType) -> PathBuf {
    	let mut dir = geth_dir_path();
    	match t {
    		DirectoryType::Testnet => {
    			dir.push("testnet");
    			dir.push("keystore");
    		},
    		DirectoryType::Main => {
    			dir.push("keystore");
    		}
    	}
    	dir
    }

    pub struct GethDirectory {
    	dir: RootDiskDirectory,
    }

    impl GethDirectory {
    	pub fn create(t: DirectoryType) -> Result<Self, Error> {
    		let result = GethDirectory {
    			dir: RootDiskDirectory::create(geth_keystore(t))?,
    		};

    		Ok(result)
    	}

    	pub fn open(t: DirectoryType) -> Self {
    		GethDirectory {
    			dir: RootDiskDirectory::at(geth_keystore(t)),
    		}
    	}
    }

    impl KeyDirectory for GethDirectory {
    	fn load(&self) -> Result<Vec<SafeAccount>, Error> {
    		self.dir.load()
    	}

    	fn insert(&self, account: SafeAccount) -> Result<SafeAccount, Error> {
    		self.dir.insert(account)
    	}

    	fn update(&self, account: SafeAccount) -> Result<SafeAccount, Error> {
    		self.dir.update(account)
    	}

    	fn remove(&self, account: &SafeAccount) -> Result<(), Error> {
    		self.dir.remove(account)
    	}
    }

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