token_address_extractor 1.2.2

use crate::{regexes::ETHEREUM_ADDRESS_REGEX, Blockchain};

/// Extracts the first Ethereum-based address from a given text and identifies the blockchain.
///
/// This function searches the input text for an Ethereum-compatible address, which must start with `0x`
/// followed by exactly 40 hexadecimal characters. If a valid address is found, it returns the first match
/// along with the associated `Blockchain::EthereumBased` enum variant.
///
/// # Arguments
///
/// * `text` - A string slice containing the input text to search.
///
/// # Returns
///
/// * `(Some(String), Blockchain::EthereumBased)` if a valid Ethereum address is found.
/// * `(None, Blockchain::EthereumBased)` if no valid address is found.
///
/// # Examples
///
/// ```
/// use token_address_extractor::{extract_ethereum_based_address, Blockchain};
/// 
/// let text = "Random text with an address: 0xAb5801a7D398351b8bE11C439e05C5b3259aec9B";
/// let (address, blockchain) = extract_ethereum_based_address(text);
/// assert_eq!(address, Some("0xAb5801a7D398351b8bE11C439e05C5b3259aec9B".to_string()));
/// assert_eq!(blockchain, Blockchain::EthereumBased);
/// ```

pub fn extract_ethereum_based_address(text: &str) ->(Option<String>,Blockchain) {
    let pattern = &ETHEREUM_ADDRESS_REGEX;
    (pattern.find(text).map(|m| m.as_str().to_string()),Blockchain::EthereumBased)
}

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

    #[test]
    fn test_extract_ethereum_address() {
        let input = "
            Some random text
            0xAb5801a7D398351b8bE11C439e05C5b3259aec9B
            more random text
        ";

        let expected_address = Some("0xAb5801a7D398351b8bE11C439e05C5b3259aec9B".to_string());

        let result = extract_ethereum_based_address(input);
        assert_eq!(result.0, expected_address);
    }

    #[test]
    fn test_no_addresses() {
        let input = "This is a test with no valid Ethereum addresses!";
        let expected_address = None;

        let result = extract_ethereum_based_address(input);
        assert_eq!(result.0, expected_address);
    }

    #[test]
    fn test_link() {
        let input = "https://dexscreener.com/bsc/0x2c46eb9820f048eeba1ce7b1dcfd302916284dad";
        let expected_address = Some("0x2c46eb9820f048eeba1ce7b1dcfd302916284dad".to_string());

        let result = extract_ethereum_based_address(input);
        assert_eq!(expected_address, result.0);
    }

    #[test]
    fn test_multiple_addresses() {
        let input = "
            0xAb5801a7D398351b8bE11C439e05C5b3259aec9B
            0x4E9ce36E442e55EcD9025B9a6E0D88485d628A67
        ";

        // The function should return only the first valid Ethereum address found.
        let expected_address = Some("0xAb5801a7D398351b8bE11C439e05C5b3259aec9B".to_string());

        let result = extract_ethereum_based_address(input);
        assert_eq!(result.0, expected_address);
    }
}