added buzzer

src/id_store.rs

@@ -1,67 +1,77 @@
-use std::collections::HashMap;
-
-#[derive(PartialEq, Eq)]
-struct TellyID (String);
-
-struct AttendanceDay {
-    date: String,
-    ids: Vec<TellyID>,
-}
-
-struct IDStore {
-    days: HashMap<String,AttendanceDay>
-}
-
-impl IDStore {
-    fn new() -> Self {
-        IDStore{
-            days: HashMap::new(),
-        }
-    }
-
-    fn add_id(&mut self, id: TellyID){
-        let day = self.get_current_day();
-
-        day.add_id(id);
-
-        self.clean_map();
-    }
-
-    fn get_current_day(&mut self) -> &mut AttendanceDay {
-        let current_day = get_day_str();
-
-        if self.days.contains_key(&current_day) {
-            return self.days.get_mut(&current_day).unwrap();
-        }
-
-        self.days.insert(current_day.clone(), AttendanceDay::new(&current_day.clone()));
-
-        self.days.get_mut(&current_day.clone()).unwrap()
-    }
-
-    fn clean_map(&mut self){
-       todo!()
-    }
-}
-
-impl AttendanceDay {
-    fn new(day: &str) -> Self{
-        Self{
-            date: day.to_owned(),
-            ids: Vec::new(),
-        }
-    }
-
-    fn add_id(&mut self, id: TellyID){
-        if self.ids.contains(&id) {
-            return
-        } 
-
-        self.ids.push(id);
-    }
-}
-
-fn get_day_str() -> String {
-    let now = chrono::offset::Local::now();
-    now.format("%Y-%m-%d").to_string()
-}
+use std::{collections::HashMap, error::Error, fs::{self, read_to_string}, result};
+use serde::{Deserialize, Serialize};
+
+#[derive(PartialEq, Eq)]
+#[derive(Deserialize, Serialize)]
+struct TellyID (String);
+
+#[derive(Deserialize, Serialize)]
+struct AttendanceDay {
+    date: String,
+    ids: Vec<TellyID>,
+}
+
+#[derive(Deserialize, Serialize)]
+struct IDStore {
+    days: HashMap<String,AttendanceDay>
+}
+
+impl IDStore {
+    
+    fn new() -> Self {
+        IDStore{
+            days: HashMap::new(),
+        }
+    }
+
+    fn new_from_json(filepath:&str) -> Result<Self, Box<dyn Error>>{
+        let readed_string = fs::read_to_string(filepath)?;
+        Ok(serde_json::from_str(&readed_string)?)
+    }
+
+    fn add_id(&mut self, id: TellyID){
+        let day = self.get_current_day();
+
+        day.add_id(id);
+    
+    }
+
+    fn get_current_day(&mut self) -> &mut AttendanceDay {
+        let current_day = get_day_str();
+
+        if self.days.contains_key(&current_day) {
+            return self.days.get_mut(&current_day).unwrap();
+        }
+
+        self.days.insert(current_day.clone(), AttendanceDay::new(&current_day.clone()));
+
+        self.days.get_mut(&current_day.clone()).unwrap()
+    }
+
+    fn export_jason(&self, filepath:&str) -> Result <(), Box<dyn Error>> {
+
+        // Serialize it to a JSON string and safe it in filepath file
+        Ok(fs::write("attendence_list.json", serde_json::to_string(&self)?)?)
+    }
+}
+
+impl AttendanceDay {
+    fn new(day: &str) -> Self{
+        Self{
+            date: day.to_owned(),
+            ids: Vec::new(),
+        }
+    }
+
+    fn add_id(&mut self, id: TellyID){
+        if self.ids.contains(&id) {
+            return
+        } 
+        self.ids.push(id);
+    }
+}
+
+fn get_day_str() -> String {
+    let now = chrono::offset::Local::now();
+    now.format("%Y-%m-%d").to_string()
+}