Extract Roll & Exposure to a separate file

src/main.rs

@@ -2,12 +2,12 @@
 
 mod new_roll;
 mod roll_view;
+mod roll;
 
 use eframe::egui;
-use egui_datepicker::{Local, NaiveDate};
 use new_roll::NewRollWindow;
+use roll::Roll;
 use roll_view::RollViewWindow;
-use serde::{Deserialize, Serialize};
 
 fn main() -> Result<(), eframe::Error> {
     env_logger::init(); // Log to stderr (if you run with `RUST_LOG=debug`).
@@ -22,62 +22,6 @@ fn main() -> Result<(), eframe::Error> {
     )
 }
 
-#[derive(Debug, Serialize, Deserialize, Clone)]
-pub struct Exposure {
-    num: u8,
-    #[serde(default)]
-    printed: bool,
-    #[serde(default)]
-    damaged: bool,
-    #[serde(default)]
-    paper: Option<String>,
-}
-
-#[derive(Debug, Serialize, Deserialize, Clone)]
-pub struct Roll {
-    id: String,
-    name: String,
-    #[serde(default)]
-    desc: String,
-    date: NaiveDate,
-    exposures: Vec<Exposure>,
-}
-
-impl Roll {
-    fn new(id: String, name: String, desc: String, date: NaiveDate, num_exposures: u8) -> Self {
-        let mut exposures = Vec::new();
-        for num in 1..=num_exposures {
-            exposures.push(Exposure {
-                num,
-                printed: false,
-                damaged: false,
-                paper: None,
-            })
-        }
-        Self {
-            id,
-            name,
-            desc,
-            date,
-            exposures,
-        }
-    }
-
-    pub fn short_str(&self) -> String {
-        format!(
-            "{}{} on {}, {} exp",
-            self.id,
-            if self.name.is_empty() {
-                String::new()
-            } else {
-                format!(" - {}", self.name)
-            },
-            self.date.format("%m/%d/%Y"),
-            self.exposures.len()
-        )
-    }
-}
-
 pub struct AppState {
     pub rolls: Vec<Roll>,
 }

src/new_roll.rs

@@ -5,7 +5,7 @@ use eframe::{
 };
 use egui_datepicker::DatePicker;
 
-use crate::{AppState, Roll};
+use crate::{AppState, roll::Roll};
 
 pub struct NewRollWindow {
     id: String,