armature-config 0.1.1

Configuration management for Armature with environment and file support
Documentation 
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// Configuration validation

use crate::{ConfigError, Result};

/// Trait for validating configuration
pub trait Validate {
    fn validate(&self) -> Result<()>;
}

/// Configuration validator with rules
pub struct ConfigValidator;

impl ConfigValidator {
    /// Validate that a value is not empty
    pub fn not_empty(value: &str, field: &str) -> Result<()> {
        if value.is_empty() {
            return Err(ConfigError::ValidationError(format!(
                "{} cannot be empty",
                field
            )));
        }
        Ok(())
    }

    /// Validate that a number is within range
    pub fn in_range<T: PartialOrd>(value: T, min: T, max: T, field: &str) -> Result<()> {
        if value < min || value > max {
            return Err(ConfigError::ValidationError(format!(
                "{} must be between min and max",
                field
            )));
        }
        Ok(())
    }

    /// Validate that a value is in a list of allowed values
    pub fn one_of<T: PartialEq>(value: &T, allowed: &[T], field: &str) -> Result<()> {
        if !allowed.contains(value) {
            return Err(ConfigError::ValidationError(format!(
                "{} must be one of the allowed values",
                field
            )));
        }
        Ok(())
    }

    /// Validate URL format
    pub fn is_url(value: &str, field: &str) -> Result<()> {
        if !value.starts_with("http://") && !value.starts_with("https://") {
            return Err(ConfigError::ValidationError(format!(
                "{} must be a valid URL",
                field
            )));
        }
        Ok(())
    }

    /// Validate email format (basic)
    pub fn is_email(value: &str, field: &str) -> Result<()> {
        if !value.contains('@') || !value.contains('.') {
            return Err(ConfigError::ValidationError(format!(
                "{} must be a valid email",
                field
            )));
        }
        Ok(())
    }

    /// Validate port number
    pub fn is_port(value: u16, field: &str) -> Result<()> {
        if value == 0 {
            return Err(ConfigError::ValidationError(format!(
                "{} must be a valid port number",
                field
            )));
        }
        Ok(())
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_not_empty_validation() {
        assert!(ConfigValidator::not_empty("value", "field").is_ok());
        assert!(ConfigValidator::not_empty("", "field").is_err());
    }

    #[test]
    fn test_range_validation() {
        assert!(ConfigValidator::in_range(5, 1, 10, "field").is_ok());
        assert!(ConfigValidator::in_range(0, 1, 10, "field").is_err());
        assert!(ConfigValidator::in_range(11, 1, 10, "field").is_err());
    }

    #[test]
    fn test_one_of_validation() {
        let allowed = vec!["a", "b", "c"];
        assert!(ConfigValidator::one_of(&"a", &allowed, "field").is_ok());
        assert!(ConfigValidator::one_of(&"d", &allowed, "field").is_err());
    }

    #[test]
    fn test_url_validation() {
        assert!(ConfigValidator::is_url("https://example.com", "field").is_ok());
        assert!(ConfigValidator::is_url("http://example.com", "field").is_ok());
        assert!(ConfigValidator::is_url("example.com", "field").is_err());
    }

    #[test]
    fn test_port_validation() {
        assert!(ConfigValidator::is_port(8080, "field").is_ok());
        assert!(ConfigValidator::is_port(0, "field").is_err());
    }
}