refactor configs into a crate

apps/api/src/configs/logging.rs

@@ -0,0 +1,52 @@
+use config::{Config, ConfigError};
+use tracing::{Level, warn};
+
+use super::{
+    FromConfig,
+    key::{LOGGING_LEVEL_KEY, LOGGING_UTC_KEY},
+};
+
+#[derive(Debug, Clone)]
+pub struct LoggingSettings {
+    pub level: Level,
+    pub utc: bool,
+}
+
+impl FromConfig for LoggingSettings {
+    fn from_config(_config: &Config) -> Result<Self, String> {
+        const DEFAULT_LOGGING_LEVEL: Level = Level::INFO;
+        Ok(LoggingSettings {
+            level: _config
+                .get_string(LOGGING_LEVEL_KEY)
+                .unwrap_or_else(|err| {
+                    warn!(
+                        "Failed to read {} from configuration, defaulting to {}. Error: {}",
+                        LOGGING_LEVEL_KEY, DEFAULT_LOGGING_LEVEL, err
+                    );
+                    DEFAULT_LOGGING_LEVEL.to_string()
+                })
+                .parse()
+                .unwrap_or_else(|err| {
+                    warn!(
+                        "Invalid logging level in configuration, defaulting to {}. Error: {}",
+                        DEFAULT_LOGGING_LEVEL, err
+                    );
+                    DEFAULT_LOGGING_LEVEL
+                }),
+            utc: _config
+                .get_bool(LOGGING_UTC_KEY)
+                .unwrap_or_else(|err: ConfigError| {
+                    const DEFAULT_UTC: bool = false;
+                    warn!(
+                        "Invalid UTC setting in configuration, defaulting to {}. Error: {}",
+                        DEFAULT_UTC, err
+                    );
+                    DEFAULT_UTC
+                }),
+        })
+    }
+
+    fn validate(&self) -> Result<(), String> {
+        Ok(())
+    }
+}