transaction: add CSV deserialization
It is unfortunate that both [1] and [2] conspire to make this code way worse than it could otherwise be with a saner (de)serialization format. We both need to introduce `TransactionRecord` due to tagged enums not being powerful enough in CSV, and make its `amount` field optional to deal with the varying number of fields for each kind of transaction. [1]: https://github.com/BurntSushi/rust-csv/issues/211 [2]: https://github.com/BurntSushi/rust-csv/issues/172
This commit is contained in:
parent
c7e64692e6
commit
ffd6a20a30
|
|
@ -2,6 +2,133 @@
|
|||
# It is not intended for manual editing.
|
||||
version = 3
|
||||
|
||||
[[package]]
|
||||
name = "android_system_properties"
|
||||
version = "0.1.4"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d7ed72e1635e121ca3e79420540282af22da58be50de153d36f81ddc6b83aa9e"
|
||||
dependencies = [
|
||||
"libc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "autocfg"
|
||||
version = "1.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
|
||||
|
||||
[[package]]
|
||||
name = "base64"
|
||||
version = "0.13.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
|
||||
|
||||
[[package]]
|
||||
name = "bstr"
|
||||
version = "0.2.17"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ba3569f383e8f1598449f1a423e72e99569137b47740b1da11ef19af3d5c3223"
|
||||
dependencies = [
|
||||
"lazy_static",
|
||||
"memchr",
|
||||
"regex-automata",
|
||||
"serde",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "bumpalo"
|
||||
version = "3.11.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c1ad822118d20d2c234f427000d5acc36eabe1e29a348c89b63dd60b13f28e5d"
|
||||
|
||||
[[package]]
|
||||
name = "cfg-if"
|
||||
version = "1.0.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
|
||||
|
||||
[[package]]
|
||||
name = "chrono"
|
||||
version = "0.4.22"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "bfd4d1b31faaa3a89d7934dbded3111da0d2ef28e3ebccdb4f0179f5929d1ef1"
|
||||
dependencies = [
|
||||
"iana-time-zone",
|
||||
"num-integer",
|
||||
"num-traits",
|
||||
"serde",
|
||||
"winapi",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "core-foundation-sys"
|
||||
version = "0.8.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"
|
||||
|
||||
[[package]]
|
||||
name = "csv"
|
||||
version = "1.1.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "22813a6dc45b335f9bade10bf7271dc477e81113e89eb251a0bc2a8a81c536e1"
|
||||
dependencies = [
|
||||
"bstr",
|
||||
"csv-core",
|
||||
"itoa 0.4.8",
|
||||
"ryu",
|
||||
"serde",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "csv-core"
|
||||
version = "0.1.10"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2b2466559f260f48ad25fe6317b3c8dac77b5bdb5763ac7d9d6103530663bc90"
|
||||
dependencies = [
|
||||
"memchr",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "darling"
|
||||
version = "0.14.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "4529658bdda7fd6769b8614be250cdcfc3aeb0ee72fe66f9e41e5e5eb73eac02"
|
||||
dependencies = [
|
||||
"darling_core",
|
||||
"darling_macro",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "darling_core"
|
||||
version = "0.14.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "649c91bc01e8b1eac09fb91e8dbc7d517684ca6be8ebc75bb9cafc894f9fdb6f"
|
||||
dependencies = [
|
||||
"fnv",
|
||||
"ident_case",
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"strsim",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "darling_macro"
|
||||
version = "0.14.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ddfc69c5bfcbd2fc09a0f38451d2daf0e372e367986a83906d1b0dbc88134fb5"
|
||||
dependencies = [
|
||||
"darling_core",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "fnv"
|
||||
version = "1.0.7"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
|
||||
|
||||
[[package]]
|
||||
name = "fpdec"
|
||||
version = "0.5.4"
|
||||
|
|
@ -28,6 +155,130 @@ dependencies = [
|
|||
"quote",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "hashbrown"
|
||||
version = "0.12.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
|
||||
|
||||
[[package]]
|
||||
name = "hex"
|
||||
version = "0.4.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
|
||||
|
||||
[[package]]
|
||||
name = "iana-time-zone"
|
||||
version = "0.1.46"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ad2bfd338099682614d3ee3fe0cd72e0b6a41ca6a87f6a74a3bd593c91650501"
|
||||
dependencies = [
|
||||
"android_system_properties",
|
||||
"core-foundation-sys",
|
||||
"js-sys",
|
||||
"wasm-bindgen",
|
||||
"winapi",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "ident_case"
|
||||
version = "1.0.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
|
||||
|
||||
[[package]]
|
||||
name = "indexmap"
|
||||
version = "1.9.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "10a35a97730320ffe8e2d410b5d3b69279b98d2c14bdb8b70ea89ecf7888d41e"
|
||||
dependencies = [
|
||||
"autocfg",
|
||||
"hashbrown",
|
||||
"serde",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "itoa"
|
||||
version = "0.4.8"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "b71991ff56294aa922b450139ee08b3bfc70982c6b2c7562771375cf73542dd4"
|
||||
|
||||
[[package]]
|
||||
name = "itoa"
|
||||
version = "1.0.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "6c8af84674fe1f223a982c933a0ee1086ac4d4052aa0fb8060c12c6ad838e754"
|
||||
|
||||
[[package]]
|
||||
name = "js-sys"
|
||||
version = "0.3.59"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "258451ab10b34f8af53416d1fdab72c22e805f0c92a1136d59470ec0b11138b2"
|
||||
dependencies = [
|
||||
"wasm-bindgen",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "lazy_static"
|
||||
version = "1.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
|
||||
|
||||
[[package]]
|
||||
name = "libc"
|
||||
version = "0.2.132"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8371e4e5341c3a96db127eb2465ac681ced4c433e01dd0e938adbef26ba93ba5"
|
||||
|
||||
[[package]]
|
||||
name = "log"
|
||||
version = "0.4.17"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
|
||||
dependencies = [
|
||||
"cfg-if",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "memchr"
|
||||
version = "2.5.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
|
||||
|
||||
[[package]]
|
||||
name = "num-integer"
|
||||
version = "0.1.45"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "225d3389fb3509a24c93f5c29eb6bde2586b98d9f016636dff58d7c6f7569cd9"
|
||||
dependencies = [
|
||||
"autocfg",
|
||||
"num-traits",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "num-traits"
|
||||
version = "0.2.15"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
|
||||
dependencies = [
|
||||
"autocfg",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "num_threads"
|
||||
version = "0.1.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2819ce041d2ee131036f4fc9d6ae7ae125a3a40e97ba64d04fe799ad9dabbb44"
|
||||
dependencies = [
|
||||
"libc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "once_cell"
|
||||
version = "1.13.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "074864da206b4973b84eb91683020dbefd6a8c3f0f38e054d93954e891935e4e"
|
||||
|
||||
[[package]]
|
||||
name = "proc-macro2"
|
||||
version = "1.0.43"
|
||||
|
|
@ -41,7 +292,10 @@ dependencies = [
|
|||
name = "processor"
|
||||
version = "0.1.0"
|
||||
dependencies = [
|
||||
"csv",
|
||||
"fpdec",
|
||||
"serde",
|
||||
"serde_with",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
|
|
@ -53,8 +307,184 @@ dependencies = [
|
|||
"proc-macro2",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "regex-automata"
|
||||
version = "0.1.10"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
|
||||
|
||||
[[package]]
|
||||
name = "ryu"
|
||||
version = "1.0.11"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
|
||||
|
||||
[[package]]
|
||||
name = "serde"
|
||||
version = "1.0.144"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0f747710de3dcd43b88c9168773254e809d8ddbdf9653b84e2554ab219f17860"
|
||||
dependencies = [
|
||||
"serde_derive",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "serde_derive"
|
||||
version = "1.0.144"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "94ed3a816fb1d101812f83e789f888322c34e291f894f19590dc310963e87a00"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "serde_json"
|
||||
version = "1.0.85"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e55a28e3aaef9d5ce0506d0a14dbba8054ddc7e499ef522dd8b26859ec9d4a44"
|
||||
dependencies = [
|
||||
"itoa 1.0.3",
|
||||
"ryu",
|
||||
"serde",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "serde_with"
|
||||
version = "2.0.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "89df7a26519371a3cce44fbb914c2819c84d9b897890987fa3ab096491cc0ea8"
|
||||
dependencies = [
|
||||
"base64",
|
||||
"chrono",
|
||||
"hex",
|
||||
"indexmap",
|
||||
"serde",
|
||||
"serde_json",
|
||||
"serde_with_macros",
|
||||
"time",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "serde_with_macros"
|
||||
version = "2.0.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "de337f322382fcdfbb21a014f7c224ee041a23785651db67b9827403178f698f"
|
||||
dependencies = [
|
||||
"darling",
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "strsim"
|
||||
version = "0.10.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "1.0.99"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"unicode-ident",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "time"
|
||||
version = "0.3.13"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "db76ff9fa4b1458b3c7f077f3ff9887394058460d21e634355b273aaf11eea45"
|
||||
dependencies = [
|
||||
"itoa 1.0.3",
|
||||
"libc",
|
||||
"num_threads",
|
||||
"serde",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "unicode-ident"
|
||||
version = "1.0.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen"
|
||||
version = "0.2.82"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "fc7652e3f6c4706c8d9cd54832c4a4ccb9b5336e2c3bd154d5cccfbf1c1f5f7d"
|
||||
dependencies = [
|
||||
"cfg-if",
|
||||
"wasm-bindgen-macro",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-backend"
|
||||
version = "0.2.82"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "662cd44805586bd52971b9586b1df85cdbbd9112e4ef4d8f41559c334dc6ac3f"
|
||||
dependencies = [
|
||||
"bumpalo",
|
||||
"log",
|
||||
"once_cell",
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
"wasm-bindgen-shared",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-macro"
|
||||
version = "0.2.82"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "b260f13d3012071dfb1512849c033b1925038373aea48ced3012c09df952c602"
|
||||
dependencies = [
|
||||
"quote",
|
||||
"wasm-bindgen-macro-support",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-macro-support"
|
||||
version = "0.2.82"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5be8e654bdd9b79216c2929ab90721aa82faf65c48cdf08bdc4e7f51357b80da"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
"wasm-bindgen-backend",
|
||||
"wasm-bindgen-shared",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-shared"
|
||||
version = "0.2.82"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "6598dd0bd3c7d51095ff6531a5b23e02acdc81804e30d8f07afb77b7215a140a"
|
||||
|
||||
[[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"
|
||||
|
|
|
|||
|
|
@ -6,4 +6,7 @@ edition = "2021"
|
|||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
csv = "1.1"
|
||||
fpdec = "0.5"
|
||||
serde = { version = "1.0", features = ["derive"] }
|
||||
serde_with = "2.0"
|
||||
|
|
|
|||
19
src/core.rs
19
src/core.rs
|
|
@ -1,16 +1,27 @@
|
|||
//! Core types used in the processing of payments.
|
||||
|
||||
use serde::{Deserialize, Serialize};
|
||||
use serde_with::{serde_as, DisplayFromStr};
|
||||
|
||||
/// Clients are anonymous, identified by globally unique ids. "16-bit ought to be enough for
|
||||
/// anyone".
|
||||
#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
|
||||
#[derive(
|
||||
Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash, Deserialize, Serialize,
|
||||
)]
|
||||
#[serde(transparent)]
|
||||
pub struct ClientId(pub u16);
|
||||
|
||||
/// Transactions are identified by a globally unique id. 32 bit is sufficient for our puposes.
|
||||
#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
|
||||
#[derive(
|
||||
Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash, Deserialize, Serialize,
|
||||
)]
|
||||
#[serde(transparent)]
|
||||
pub struct TxId(pub u32);
|
||||
|
||||
/// Amounts are represented as exact decimals, up to four places past the decimal.
|
||||
/// For ease of implementation, make use of [fpdec::Decimal] instead of implementing a custom
|
||||
/// fixed-point number.
|
||||
#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord)]
|
||||
pub struct TxAmount(pub fpdec::Decimal);
|
||||
#[serde_as]
|
||||
#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Deserialize, Serialize)]
|
||||
#[serde(transparent)]
|
||||
pub struct TxAmount(#[serde_as(as = "DisplayFromStr")] pub fpdec::Decimal);
|
||||
|
|
|
|||
|
|
@ -1,8 +1,11 @@
|
|||
//! Define all supported transactions.
|
||||
use crate::core::{ClientId, TxAmount, TxId};
|
||||
|
||||
use serde::Deserialize;
|
||||
|
||||
/// A generic [Transaction].
|
||||
#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
|
||||
#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Deserialize)]
|
||||
#[serde(try_from = "TransactionRecord")]
|
||||
pub enum Transaction {
|
||||
Deposit(Deposit),
|
||||
Withdrawal(Withdrawal),
|
||||
|
|
@ -11,6 +14,61 @@ pub enum Transaction {
|
|||
Chargeback(Chargeback),
|
||||
}
|
||||
|
||||
impl Transaction {
|
||||
/// Build a [csv::ReaderBuilder] configured to read a CSV formatted [Transaction] stream.
|
||||
pub fn configured_csv_reader_builder() -> csv::ReaderBuilder {
|
||||
let mut builder = csv::ReaderBuilder::new();
|
||||
builder
|
||||
// Expect header input
|
||||
.has_headers(true)
|
||||
// Allow whitespace
|
||||
.trim(csv::Trim::All)
|
||||
// Allow trailing fields to be omitted
|
||||
.flexible(true);
|
||||
builder
|
||||
}
|
||||
}
|
||||
|
||||
// A type used to deserialize [Transaction] from an input CSV stream.
|
||||
#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Deserialize)]
|
||||
struct TransactionRecord<'a> {
|
||||
#[serde(rename = "type")]
|
||||
type_: &'a str,
|
||||
client: ClientId,
|
||||
tx: TxId,
|
||||
amount: Option<TxAmount>,
|
||||
}
|
||||
|
||||
impl TryFrom<TransactionRecord<'_>> for Transaction {
|
||||
// FIXME: use an actual error type.
|
||||
type Error = String;
|
||||
|
||||
fn try_from(value: TransactionRecord<'_>) -> Result<Self, Self::Error> {
|
||||
let TransactionRecord {
|
||||
type_,
|
||||
client,
|
||||
tx,
|
||||
amount,
|
||||
} = value;
|
||||
|
||||
let transaction = match type_ {
|
||||
"deposit" => {
|
||||
let amount = amount.ok_or("Missing amount for transaction")?;
|
||||
Transaction::Deposit(Deposit { client, tx, amount })
|
||||
}
|
||||
"withdrawal" => {
|
||||
let amount = amount.ok_or("Missing amount for transaction")?;
|
||||
Transaction::Withdrawal(Withdrawal { client, tx, amount })
|
||||
}
|
||||
"dispute" => Transaction::Dispute(Dispute { client, tx }),
|
||||
"resolve" => Transaction::Resolve(Resolve { client, tx }),
|
||||
"chargeback" => Transaction::Chargeback(Chargeback { client, tx }),
|
||||
_ => return Err(format!("Unkown transaction type '{}'", type_)),
|
||||
};
|
||||
Ok(transaction)
|
||||
}
|
||||
}
|
||||
|
||||
/// Deposit funds into an account, i.e: increase its balance by the amount given.
|
||||
#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
|
||||
pub struct Deposit {
|
||||
|
|
@ -55,3 +113,117 @@ pub struct Chargeback {
|
|||
pub client: ClientId,
|
||||
pub tx: TxId,
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod test {
|
||||
use super::*;
|
||||
use fpdec::{Dec, Decimal};
|
||||
|
||||
fn parse_transaction(input: &str) -> Transaction {
|
||||
let rdr = Transaction::configured_csv_reader_builder().from_reader(input.as_bytes());
|
||||
rdr.into_deserialize().next().unwrap().unwrap()
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn deserialize_deposit() {
|
||||
let data = "type,client,tx,amount\ndeposit,1,2,3.0";
|
||||
assert_eq!(
|
||||
parse_transaction(data),
|
||||
Transaction::Deposit(Deposit {
|
||||
client: ClientId(1),
|
||||
tx: TxId(2),
|
||||
amount: TxAmount(Dec!(3.0))
|
||||
}),
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn deserialize_withdrawal() {
|
||||
let data = "type,client,tx,amount\nwithdrawal,1,2,3.0";
|
||||
assert_eq!(
|
||||
parse_transaction(data),
|
||||
Transaction::Withdrawal(Withdrawal {
|
||||
client: ClientId(1),
|
||||
tx: TxId(2),
|
||||
amount: TxAmount(Dec!(3.0))
|
||||
}),
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn deserialize_dispute() {
|
||||
let data = "type,client,tx,amount\ndispute,1,2";
|
||||
assert_eq!(
|
||||
parse_transaction(data),
|
||||
Transaction::Dispute(Dispute {
|
||||
client: ClientId(1),
|
||||
tx: TxId(2),
|
||||
}),
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn deserialize_resolve() {
|
||||
let data = "type,client,tx,amount\nresolve,1,2";
|
||||
assert_eq!(
|
||||
parse_transaction(data),
|
||||
Transaction::Resolve(Resolve {
|
||||
client: ClientId(1),
|
||||
tx: TxId(2),
|
||||
}),
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn deserialize_chargeback() {
|
||||
let data = "type,client,tx,amount\nchargeback,1,2";
|
||||
assert_eq!(
|
||||
parse_transaction(data),
|
||||
Transaction::Chargeback(Chargeback {
|
||||
client: ClientId(1),
|
||||
tx: TxId(2),
|
||||
}),
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn deserialize_transactions() {
|
||||
let data = concat!(
|
||||
"type,client,tx,amount\n",
|
||||
"deposit, 1, 2, 12.0000\n",
|
||||
"withdrawal , 3,4, 42.27 \n",
|
||||
"dispute, 5 , 6, \n",
|
||||
" resolve,7,8,\n",
|
||||
"chargeback,9,10",
|
||||
);
|
||||
let rdr = Transaction::configured_csv_reader_builder().from_reader(data.as_bytes());
|
||||
let transactions: Result<Vec<Transaction>, _> = rdr.into_deserialize().collect();
|
||||
assert_eq!(
|
||||
transactions.unwrap(),
|
||||
vec![
|
||||
Transaction::Deposit(Deposit {
|
||||
client: ClientId(1),
|
||||
tx: TxId(2),
|
||||
amount: TxAmount(Dec!(12.0000)),
|
||||
}),
|
||||
Transaction::Withdrawal(Withdrawal {
|
||||
client: ClientId(3),
|
||||
tx: TxId(4),
|
||||
amount: TxAmount(Dec!(42.27)),
|
||||
}),
|
||||
Transaction::Dispute(Dispute {
|
||||
client: ClientId(5),
|
||||
tx: TxId(6),
|
||||
}),
|
||||
Transaction::Resolve(Resolve {
|
||||
client: ClientId(7),
|
||||
tx: TxId(8),
|
||||
}),
|
||||
Transaction::Chargeback(Chargeback {
|
||||
client: ClientId(9),
|
||||
tx: TxId(10),
|
||||
}),
|
||||
]
|
||||
);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue