feat: Init read_data func

src/commands.rs

@@ -1,5 +1,5 @@
-use clap::Parser;
 use crate::data::DataTable;
+use clap::Parser;
 
 /// set_income subcommand
 pub fn set_income() {
@@ -31,6 +31,21 @@ fn write_data(data: DataTable, path: String) {
     }
 }
 
+fn read_data(path: String) -> DataTable {
+    let string = match std::fs::read_to_string(path) {
+        Ok(s) => s,
+        Err(err) => {
+            panic!("Failed to read data from file: {}", err);
+        }
+    };
+    match toml::from_str(&string) {
+        Ok(data) => data,
+        Err(err) => {
+            panic!("Failed to parse data from file: {}", err);
+        }
+    }
+}
+
 /// SET_INCOME constant
 const SET_INCOME: &str = "set-income";