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||||||
|
checksum = "122e570113d28d773067fab24266b66753f6ea915758651696b6e35e49f88d6e"
|
||||||
|
dependencies = [
|
||||||
|
"cfg-if",
|
||||||
|
"libc",
|
||||||
|
"winapi",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "strum"
|
||||||
|
version = "0.20.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "7318c509b5ba57f18533982607f24070a55d353e90d4cae30c467cdb2ad5ac5c"
|
||||||
|
dependencies = [
|
||||||
|
"strum_macros",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "strum_macros"
|
||||||
|
version = "0.20.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "ee8bc6b87a5112aeeab1f4a9f7ab634fe6cbefc4850006df31267f4cfb9e3149"
|
||||||
|
dependencies = [
|
||||||
|
"heck",
|
||||||
|
"proc-macro2",
|
||||||
|
"quote",
|
||||||
|
"syn",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "syn"
|
||||||
|
version = "1.0.64"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "3fd9d1e9976102a03c542daa2eff1b43f9d72306342f3f8b3ed5fb8908195d6f"
|
||||||
|
dependencies = [
|
||||||
|
"proc-macro2",
|
||||||
|
"quote",
|
||||||
|
"unicode-xid",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "tokio"
|
||||||
|
version = "1.3.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "8d56477f6ed99e10225f38f9f75f872f29b8b8bd8c0b946f63345bb144e9eeda"
|
||||||
|
dependencies = [
|
||||||
|
"autocfg",
|
||||||
|
"bytes",
|
||||||
|
"libc",
|
||||||
|
"memchr",
|
||||||
|
"mio",
|
||||||
|
"num_cpus",
|
||||||
|
"once_cell",
|
||||||
|
"parking_lot",
|
||||||
|
"pin-project-lite",
|
||||||
|
"signal-hook-registry",
|
||||||
|
"tokio-macros",
|
||||||
|
"winapi",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "tokio-macros"
|
||||||
|
version = "1.1.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "caf7b11a536f46a809a8a9f0bb4237020f70ecbf115b842360afb127ea2fda57"
|
||||||
|
dependencies = [
|
||||||
|
"proc-macro2",
|
||||||
|
"quote",
|
||||||
|
"syn",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "tokio-stream"
|
||||||
|
version = "0.1.4"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "c535f53c0cfa1acace62995a8994fc9cc1f12d202420da96ff306ee24d576469"
|
||||||
|
dependencies = [
|
||||||
|
"futures-core",
|
||||||
|
"pin-project-lite",
|
||||||
|
"tokio",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "tokio-test"
|
||||||
|
version = "0.4.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "f58403903e94d4bc56805e46597fced893410b2e753e229d3f7f22423ea03f67"
|
||||||
|
dependencies = [
|
||||||
|
"async-stream",
|
||||||
|
"bytes",
|
||||||
|
"futures-core",
|
||||||
|
"tokio",
|
||||||
|
"tokio-stream",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "unicode-segmentation"
|
||||||
|
version = "1.7.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "bb0d2e7be6ae3a5fa87eed5fb451aff96f2573d2694942e40543ae0bbe19c796"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "unicode-xid"
|
||||||
|
version = "0.2.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi"
|
||||||
|
version = "0.3.9"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||||
|
dependencies = [
|
||||||
|
"winapi-i686-pc-windows-gnu",
|
||||||
|
"winapi-x86_64-pc-windows-gnu",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi-i686-pc-windows-gnu"
|
||||||
|
version = "0.4.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi-x86_64-pc-windows-gnu"
|
||||||
|
version = "0.4.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||||
19
Cargo.toml
Normal file
19
Cargo.toml
Normal file
@ -0,0 +1,19 @@
|
|||||||
|
[package]
|
||||||
|
name = "act"
|
||||||
|
version = "0.1.0"
|
||||||
|
authors = ["Lewis Diamond <git@lewisdiamond.com>"]
|
||||||
|
edition = "2018"
|
||||||
|
|
||||||
|
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||||
|
|
||||||
|
[dependencies]
|
||||||
|
serde = { version = "1.0", features = ["derive"] }
|
||||||
|
strum = { version = "0.20.0", features = ["derive"] }
|
||||||
|
tokio = { version = "1", features = ["full"] }
|
||||||
|
tokio-stream = "0.1"
|
||||||
|
async-stream = "0.3"
|
||||||
|
csv = "1.1.5"
|
||||||
|
strum_macros = "0.20.1"
|
||||||
|
|
||||||
|
[dev-dependencies]
|
||||||
|
tokio-test = "0.4.0"
|
||||||
1
rustfmt.toml
Normal file
1
rustfmt.toml
Normal file
@ -0,0 +1 @@
|
|||||||
|
edition = "2018"
|
||||||
65
src/lib.rs
Normal file
65
src/lib.rs
Normal file
@ -0,0 +1,65 @@
|
|||||||
|
pub mod types;
|
||||||
|
use async_stream::stream;
|
||||||
|
use std::io::Read;
|
||||||
|
use tokio_stream::Stream;
|
||||||
|
use types::Transaction;
|
||||||
|
|
||||||
|
pub fn parse<R: Read>(input: R) -> impl Stream<Item = Transaction> {
|
||||||
|
let mut reader = csv::ReaderBuilder::new()
|
||||||
|
.trim(csv::Trim::All)
|
||||||
|
.has_headers(true)
|
||||||
|
.from_reader(input);
|
||||||
|
|
||||||
|
stream! {
|
||||||
|
for tx in reader.deserialize() {
|
||||||
|
match tx {
|
||||||
|
Ok(tx) => yield tx,
|
||||||
|
//Depending on the infrastructure, a specific output format
|
||||||
|
//might be used to add monitoring/alerting
|
||||||
|
Err(e) => eprintln!("Error reading CSV: {}", e),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use super::*;
|
||||||
|
use tokio_stream::StreamExt;
|
||||||
|
use tokio_test::block_on;
|
||||||
|
use types::Transaction;
|
||||||
|
use types::TransactionType;
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn valid_csv_is_parsed() {
|
||||||
|
block_on(async {
|
||||||
|
let data = "\
|
||||||
|
type,client,tx,amount
|
||||||
|
deposit,1,1,1.0
|
||||||
|
deposit,2,2,2.0
|
||||||
|
deposit,1,3,2.0
|
||||||
|
withdrawal,1,4,1.5
|
||||||
|
withdrawal,2,5,3.0";
|
||||||
|
|
||||||
|
let expected = vec![Transaction {tx_type: TransactionType::Deposit, amount: 10000, client: 1, tx: 1}];
|
||||||
|
let txs = parse(data.as_bytes()).collect::<Vec<Transaction>>().await;
|
||||||
|
assert_eq!(expected, txs);
|
||||||
|
});
|
||||||
|
}
|
||||||
|
#[test]
|
||||||
|
fn valid_csv_with_whitespaces_is_parsed() {
|
||||||
|
block_on(async {
|
||||||
|
let data = "\
|
||||||
|
type, client, tx, amount
|
||||||
|
deposit, 1, 1, 1.0
|
||||||
|
deposit, 2, 2, 2.0
|
||||||
|
deposit, 1, 3, 2.0
|
||||||
|
withdrawal, 1, 4, 1.5
|
||||||
|
withdrawal, 2, 5, 3.0";
|
||||||
|
|
||||||
|
let txs = parse(data.as_bytes());
|
||||||
|
let result: Vec<Transaction> = txs.collect::<Vec<Transaction>>().await;
|
||||||
|
result.iter().for_each(|t| eprintln!("{:?}", t));
|
||||||
|
});
|
||||||
|
}
|
||||||
|
}
|
||||||
35
src/types/mod.rs
Normal file
35
src/types/mod.rs
Normal file
@ -0,0 +1,35 @@
|
|||||||
|
use serde::{Deserialize, Deserializer};
|
||||||
|
use serde::de;
|
||||||
|
|
||||||
|
#[derive(Eq, PartialEq, Debug, Deserialize)]
|
||||||
|
#[serde(rename_all = "lowercase")]
|
||||||
|
pub enum TransactionType {
|
||||||
|
Deposit,
|
||||||
|
Withdrawal,
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug, Deserialize, PartialEq)]
|
||||||
|
pub struct Transaction {
|
||||||
|
#[serde(rename = "type")]
|
||||||
|
pub tx_type: TransactionType,
|
||||||
|
pub client: usize,
|
||||||
|
pub tx: usize,
|
||||||
|
/// Amount of the smallest unit, e.g. 0.0001 as per the specification
|
||||||
|
#[serde(deserialize_with = "de_amount")]
|
||||||
|
pub amount: usize,
|
||||||
|
}
|
||||||
|
|
||||||
|
fn de_amount<'de, D>(deserializer: D) -> Result<usize, D::Error> where D: Deserializer<'de> {
|
||||||
|
//TODO validate for input such as `.100` so it doesn't give 100
|
||||||
|
let deserialized = String::deserialize(deserializer)?;
|
||||||
|
let mut splitted = deserialized.split('.');
|
||||||
|
let mut ret: usize = 0;
|
||||||
|
let mut factor = 4;
|
||||||
|
while let Some(s) = splitted.next() {
|
||||||
|
ret += s.parse::<usize>().map_err(de::Error::custom)? * 10usize.pow(factor);
|
||||||
|
if factor < 1 { break;}
|
||||||
|
factor -= 4;
|
||||||
|
};
|
||||||
|
|
||||||
|
Ok(ret)
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue
Block a user