Item in collections

src/db.rs

@@ -4,7 +4,7 @@ use std::hash::{Hash, Hasher};
 use std::fs;
 use std::io::{self, Write, BufRead};
 use std::fmt;
-use std::cmp::PartialEq;
+use std::cmp::{PartialEq, Ordering};
 
 
 pub struct Item {
@@ -12,7 +12,6 @@ pub struct Item {
     pub content: String
 }
 
-
 impl Item {
     pub fn from(s: String) -> Item {
         Item { id: s, content: String::from("") }
@@ -41,37 +40,31 @@ impl fmt::Display for Item {
     }
 }
 
-pub fn test_items() {
+impl PartialOrd for Item {
-    let mut item1 = Item::from("item1".to_string());
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
-    item1.content = "some content".to_string();
+        self.id.partial_cmp(&other.id)
-    let mut item2 = Item::from("item1".to_string());
-    item2.content = "other content".to_string();
-
-    let mut hs = HashSet::<Item>::new();
-    hs.insert(item1);
-    hs.insert(item2);
-
-    for item in hs.iter() {
-        println!("item: {}", item)
     }
-
 }
 
+impl Ord for Item {
+    fn cmp(&self, other: &Self) -> Ordering {
+        self.id.cmp(&other.id)
+    }
+}
 
 pub struct DB {
-    pub items: HashSet::<String>
+    pub items: HashSet::<Item>
 }
 
-
 impl DB {
     pub fn new(path: &str) -> io::Result<DB> {
         let file = fs::File::open(path)?;
         let reader = io::BufReader::new(file);
-        let mut items = HashSet::<String>::new();
+        let mut items = HashSet::<Item>::new();
         for line in reader.lines() {
             match line {
-                Ok(content) => {
+                Ok(id) => {
-                    items.insert(content);
+                    items.insert(Item::from(id));
                 },
                 Err(e) => {
                     eprintln!("Error reading line, {}", e);
@@ -84,14 +77,19 @@ impl DB {
         Ok(result)
     }
 
+    pub fn contains(&self, id: &String) -> bool {
+        let item = Item::from(id.clone());
+        self.items.contains(&item)
+    }
+
     pub fn dump(&self, path: &str) -> io::Result<()> {
         let mut file = fs::OpenOptions::new()
             .write(true)
             .append(false)
             .open(path)?;
 
-        for id in self.items.iter() {
+        for item in self.items.iter() {
-            writeln!(file, "{}", id)?;
+            writeln!(file, "{}", item.id)?;
         }
 
         Ok(())

src/main.rs

@@ -1,7 +1,7 @@
 mod db;
 
 
-use db::DB;
+use db::{DB, Item};
 
 use clap::{Parser, Subcommand};
 
@@ -62,7 +62,7 @@ fn init() -> io::Result<()> {
 
 fn add(id: &String) -> io::Result<()> {
     let mut db = DB::new(STORAGE_PATH)?;
-    if db.items.contains(id) {
+    if db.contains(id) {
         // TODO: ask to edit existing in outer function which invoked this one
         return Err(io::Error::new(
             io::ErrorKind::InvalidInput,
@@ -70,7 +70,7 @@ fn add(id: &String) -> io::Result<()> {
         ))
     }
 
-    db.items.insert(id.clone());
+    db.items.insert(Item::from(id.clone()));
     db.dump(STORAGE_PATH)?;
     
     Ok(())
@@ -87,8 +87,6 @@ fn list() -> io:: Result<()> {
 }
 
 fn main() -> io::Result<()> {
-    db::test_items();
-    return Ok(());
     let cli = Cli::parse();
     match &cli.command {
         Some(Commands::Init) => {