1 files changed, 64 insertions, 0 deletions
diff --git a/cli/src/transaction.rs b/cli/src/transaction.rs
new file mode 100644
index 0000000..117edfb
--- /dev/null
+++ b/cli/src/transaction.rs
@@ -0,0 +1,64 @@
+use chrono::naive::NaiveDate;
+use rust_decimal::Decimal;
+use serde::{Deserialize, Serialize};
+use std::convert::AsRef;
+use std::fs;
+use std::hash::{Hash, Hasher};
+use std::path::Path;
+use structopt::StructOpt;
+use twox_hash::XxHash64;
+
+pub(crate) type Account = String;
+pub(crate) type Category = String;
+
+#[derive(Debug)]
+#[derive(Hash)]
+#[derive(Deserialize, Serialize)]
+#[derive(StructOpt)]
+pub enum TransactionKind {
+    Expense,
+    Income,
+    //TODO Transfer,
+}
+
+impl std::str::FromStr for TransactionKind {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "expense" => Ok(TransactionKind::Expense),
+            "income" => Ok(TransactionKind::Income),
+            _ => Err(format!("Unknown transaction kind: {:?}", s)),
+        }
+    }
+}
+
+#[derive(Debug)]
+#[derive(Hash)]
+#[derive(Deserialize, Serialize)]
+pub struct Transaction {
+    pub description: String,
+    pub date: NaiveDate,
+    pub category: Category,
+    pub amount: Decimal,
+    pub kind: TransactionKind,
+    pub from: Account,
+    pub to: Account,
+}
+
+impl Transaction {
+    pub(crate) fn write<P: AsRef<Path>>(&self, p: &P) -> std::io::Result<()> {
+        fs::write(p, serde_json::to_string_pretty(self).unwrap()) //TODO control pretty or not
+    }
+
+    //TODO Result
+    pub(crate) fn open<P: AsRef<Path>>(p: &P) -> Option<Self> {
+        fs::read_to_string(p).ok().as_ref().and_then(|s| serde_json::from_str(s).ok())
+    }
+
+    pub fn id(&self) -> u64 {
+        let mut h = XxHash64::default();
+        self.hash(&mut h);
+        h.finish()
+    }
+}