user defaults (#2014)

* user defaults

* finished user defaults

* user defaults are network-dependent

* added tests for newly added functions, logger is initialized first

* dir cleanup in progress

* user_file is placed next to snapshots

ethcore/src/trace/config.rs

@@ -15,57 +15,14 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! Traces config.
-use std::str::FromStr;
 use bloomchain::Config as BloomConfig;
-use trace::Error;
-
-/// 3-value enum.
-#[derive(Debug, Clone, Copy, PartialEq)]
-pub enum Switch {
-	/// True.
-	On,
-	/// False.
-	Off,
-	/// Auto.
-	Auto,
-}
-
-impl Default for Switch {
-	fn default() -> Self {
-		Switch::Auto
-	}
-}
-
-impl FromStr for Switch {
-	type Err = String;
-
-	fn from_str(s: &str) -> Result<Self, Self::Err> {
-		match s {
-			"on" => Ok(Switch::On),
-			"off" => Ok(Switch::Off),
-			"auto" => Ok(Switch::Auto),
-			other => Err(format!("Invalid switch value: {}", other))
-		}
-	}
-}
-
-impl Switch {
-	/// Tries to turn old switch to new value.
-	pub fn turn_to(&self, to: Switch) -> Result<bool, Error> {
-		match (*self, to) {
-			(Switch::On, Switch::On) | (Switch::On, Switch::Auto) | (Switch::Auto, Switch::On) => Ok(true),
-			(Switch::Off, Switch::On) => Err(Error::ResyncRequired),
-			_ => Ok(false),
-		}
-	}
-}
 
 /// Traces config.
 #[derive(Debug, PartialEq, Clone)]
 pub struct Config {
 	/// Indicates if tracing should be enabled or not.
 	/// If it's None, it will be automatically configured.
-	pub enabled: Switch,
+	pub enabled: bool,
 	/// Traces blooms configuration.
 	pub blooms: BloomConfig,
 	/// Preferef cache-size.
@@ -77,7 +34,7 @@ pub struct Config {
 impl Default for Config {
 	fn default() -> Self {
 		Config {
-			enabled: Switch::default(),
+			enabled: false,
 			blooms: BloomConfig {
 				levels: 3,
 				elements_per_index: 16,
@@ -87,20 +44,3 @@ impl Default for Config {
 		}
 	}
 }
-
-#[cfg(test)]
-mod tests {
-	use super::Switch;
-
-	#[test]
-	fn test_switch_parsing() {
-		assert_eq!(Switch::On, "on".parse().unwrap());
-		assert_eq!(Switch::Off, "off".parse().unwrap());
-		assert_eq!(Switch::Auto, "auto".parse().unwrap());
-	}
-
-	#[test]
-	fn test_switch_default() {
-		assert_eq!(Switch::default(), Switch::Auto);
-	}
-}