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// Copyright 2017-2018 int08h LLC
//
// 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.
extern crate hex;
use std::env;
use std::time::Duration;
use config::ServerConfig;
use config::{DEFAULT_BATCH_SIZE, DEFAULT_STATUS_INTERVAL};
use key::KeyProtection;
use Error;
///
/// Obtain a Roughenough server configuration ([ServerConfig](trait.ServerConfig.html))
/// from environment variables.
///
/// Config parameter | Environment Variable
/// ---------------- | --------------------
/// port | `ROUGHENOUGH_PORT`
/// interface | `ROUGHENOUGH_INTERFACE`
/// seed | `ROUGHENOUGH_SEED`
/// batch_size | `ROUGHENOUGH_BATCH_SIZE`
/// status_interval | `ROUGHENOUGH_STATUS_INTERVAL`
/// key_protection | `ROUGHENOUGH_KEY_PROTECTION`
///
pub struct EnvironmentConfig {
port: u16,
interface: String,
seed: Vec<u8>,
batch_size: u8,
status_interval: Duration,
key_protection: KeyProtection,
}
const ROUGHENOUGH_PORT: &str = "ROUGHENOUGH_PORT";
const ROUGHENOUGH_INTERFACE: &str = "ROUGHENOUGH_INTERFACE";
const ROUGHENOUGH_SEED: &str = "ROUGHENOUGH_SEED";
const ROUGHENOUGH_BATCH_SIZE: &str = "ROUGHENOUGH_BATCH_SIZE";
const ROUGHENOUGH_STATUS_INTERVAL: &str = "ROUGHENOUGH_STATUS_INTERVAL";
const ROUGHENOUGH_KEY_PROTECTION: &str = "ROUGHENOUGH_KEY_PROTECTION";
impl EnvironmentConfig {
pub fn new() -> Result<Self, Error> {
let mut cfg = EnvironmentConfig {
port: 0,
interface: "".to_string(),
seed: Vec::new(),
batch_size: DEFAULT_BATCH_SIZE,
status_interval: DEFAULT_STATUS_INTERVAL,
key_protection: KeyProtection::Plaintext,
};
if let Ok(port) = env::var(ROUGHENOUGH_PORT) {
cfg.port = port
.parse()
.unwrap_or_else(|_| panic!("invalid port: {}", port));
};
if let Ok(interface) = env::var(ROUGHENOUGH_INTERFACE) {
cfg.interface = interface.to_string();
};
if let Ok(seed) = env::var(ROUGHENOUGH_SEED) {
cfg.seed =
hex::decode(&seed).expect("invalid seed value; 'seed' should be a hex value");
};
if let Ok(batch_size) = env::var(ROUGHENOUGH_BATCH_SIZE) {
cfg.batch_size = batch_size
.parse()
.unwrap_or_else(|_| panic!("invalid batch_size: {}", batch_size));
};
if let Ok(status_interval) = env::var(ROUGHENOUGH_STATUS_INTERVAL) {
let val: u16 = status_interval
.parse()
.unwrap_or_else(|_| panic!("invalid status_interval: {}", status_interval));
cfg.status_interval = Duration::from_secs(u64::from(val));
};
if let Ok(key_protection) = env::var(ROUGHENOUGH_KEY_PROTECTION) {
cfg.key_protection = key_protection
.parse()
.unwrap_or_else(|_| panic!("invalid key_protection value: {}", key_protection));
}
Ok(cfg)
}
}
impl ServerConfig for EnvironmentConfig {
fn interface(&self) -> &str {
self.interface.as_ref()
}
fn port(&self) -> u16 {
self.port
}
fn seed(&self) -> Vec<u8> {
self.seed.clone()
}
fn batch_size(&self) -> u8 {
self.batch_size
}
fn status_interval(&self) -> Duration {
self.status_interval
}
fn key_protection(&self) -> &KeyProtection {
&self.key_protection
}
}
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