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use super::core::Address;
use regex::Regex;
use rustc_serialize::{Decodable, Decoder, Encodable, Encoder};
use std::str::FromStr;
impl Decodable for Address {
fn decode<D: Decoder>(d: &mut D) -> Result<Address, D::Error> {
d.read_str()
.map(|s| format!("0x{}", s))
.and_then(|s| Address::from_str(&s).map_err(|e| d.error(&e.to_string())))
}
}
impl Encodable for Address {
fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {
s.emit_str(&self.to_string()[2..])
}
}
pub fn try_extract_address(text: &str) -> Option<Address> {
lazy_static! {
static ref ADDR_RE: Regex = Regex::new(r#"address.+?([a-fA-F0-9]{40})"#).unwrap();
}
ADDR_RE
.captures(text)
.and_then(|g| g.get(1).map(|m| format!("0x{}", m.as_str())))
.and_then(|s| s.parse().ok())
}
#[cfg(test)]
mod tests {
use super::*;
use tests::*;
#[test]
fn should_encode_default_address() {
assert_eq!(
json::encode(&Address::default()).unwrap(),
"\"0000000000000000000000000000000000000000\""
);
}
#[test]
fn should_decode_zero_address() {
assert_eq!(
json::decode::<Address>("\"0000000000000000000000000000000000000000\"").unwrap(),
Address::default()
);
}
#[test]
fn should_encode_real_address() {
let addr = Address([
0x0e, 0x7c, 0x04, 0x51, 0x10, 0xb8, 0xdb, 0xf2, 0x97, 0x65, 0x04, 0x73, 0x80, 0x89,
0x89, 0x19, 0xc5, 0xcb, 0x56, 0xf4,
]);
assert_eq!(
json::encode(&addr).unwrap(),
"\"0e7c045110b8dbf29765047380898919c5cb56f4\""
);
}
#[test]
fn should_decode_real_address() {
let addr = Address([
0x0e, 0x7c, 0x04, 0x51, 0x10, 0xb8, 0xdb, 0xf2, 0x97, 0x65, 0x04, 0x73, 0x80, 0x89,
0x89, 0x19, 0xc5, 0xcb, 0x56, 0xf4,
]);
assert_eq!(
json::decode::<Address>("\"0e7c045110b8dbf29765047380898919c5cb56f4\"").unwrap(),
addr
);
}
#[test]
fn should_not_decode_wrong_address() {
assert!(json::decode::<Address>("\"__7c045110b8dbf29765047380898919c5cb56f4\"").is_err());
}
#[test]
fn should_not_decode_not_string_address() {
assert!(json::decode::<Address>("1234567890").is_err());
}
#[test]
fn should_not_decode_empty_address() {
assert!(json::decode::<Address>("\"\"").is_err());
}
#[test]
fn should_not_decode_absent_address() {
assert!(json::decode::<Address>("").is_err());
}
#[test]
fn should_extract_address_single_quoted() {
assert_eq!(
try_extract_address(r#"address: '008aeeda4d805471df9b2a5b0f38a0c3bcba786b',"#),
Some(
"0x008aeeda4d805471df9b2a5b0f38a0c3bcba786b"
.parse::<Address>()
.unwrap(),
)
);
}
#[test]
fn should_extract_address_double_quoted() {
assert_eq!(
try_extract_address(r#""address": "0047201aed0b69875b24b614dda0270bcd9f11cc","#),
Some(
"0x0047201aed0b69875b24b614dda0270bcd9f11cc"
.parse::<Address>()
.unwrap(),
)
);
}
#[test]
fn should_extract_address_with_optional_fields() {
assert_eq!(
try_extract_address(
r#" },
"address": "3f4e0668c20e100d7c2a27d4b177ac65b2875d26",
"meta": "{}",
"name": "83c175d2ef1229ab10eb6726500a4303ab729e6e44dfaac274fe75c870b23a63",
}"#,
),
Some(
"0x3f4e0668c20e100d7c2a27d4b177ac65b2875d26"
.parse::<Address>()
.unwrap(),
)
);
}
#[test]
fn should_ignore_text_without_address() {
assert_eq!(try_extract_address("\"version\": 3"), None);
}
#[test]
fn should_ignore_empty_text() {
assert_eq!(try_extract_address(""), None);
}
}