Initial import of just-about-working version

src/lib.rs

@@ -0,0 +1,43 @@
+mod transaction;
+pub use transaction::Transaction;
+pub mod ynab;
+use csv::ReaderBuilder;
+use std::io::Read;
+
+enum BankFormat {
+    Bulder,
+}
+
+impl BankFormat {
+    fn from_str(format: &str) -> Result<BankFormat, String> {
+        match format {
+            "bulder" => Ok(BankFormat::Bulder),
+            _ => Err(format!("Bank '{}' not found", format)),
+        }
+    }
+
+    fn reader<R: Read>(&self, input: R) -> csv::Reader<R> {
+        match self {
+            BankFormat::Bulder => ReaderBuilder::new()
+                .has_headers(true)
+                .delimiter(b';')
+                .from_reader(input),
+        }
+    }
+
+    fn transform(&self, record: &csv::StringRecord) -> Result<Transaction, String> {
+        match self {
+            BankFormat::Bulder => Transaction::from_fields(&record[0], &record[9], &record[1]),
+        }
+    }
+}
+
+pub fn read_transactions<R: Read>(input: R, format: &str) -> Result<Vec<Transaction>, String> {
+    let format = BankFormat::from_str(format).unwrap();
+    format
+        .reader(input)
+        .records()
+        .map(|r| r.map_err(|e| format!("parse error: {}", e)))
+        .map(|r| r.and_then(|r| format.transform(&r)))
+        .collect::<Result<Vec<_>, _>>()
+}