resolve item_id

src/main.rs

@@ -171,27 +171,15 @@ impl MPS {
         Ok(())
     }
 
+    /// Show item. Id must exists
     fn show(&mut self, id: &String) -> io::Result<()> {
         self.login()?;
         let st = self.storage.as_ref().unwrap();
-        if !st.contains(id) {
-            return Err(io::Error::new(
-                io::ErrorKind::InvalidInput,
-                format!("Can`t find id: {}", id)
-            ));
-        }
         let item = st.get(id);
         editor::open_to_show(&item.content)?;
         Ok(())
     }
 
-    fn show_by_number(&mut self, number: u32) -> io::Result<()> {
-        self.login()?;
-        let st = self.storage.as_ref().unwrap();
-        let id = st.get_id_by_number(number)?;
-        self.show(&id)
-    }
-
     fn add(&mut self, id: &String) -> io::Result<()> {
         self.login()?;
         let st = self.storage.as_mut().unwrap();
@@ -212,6 +200,7 @@ impl MPS {
         Ok(())
     }
 
+    /// Edit item, id need not to exist
     fn edit(&mut self, id: &String) -> io::Result<()> {
         self.login()?;
         let st = self.storage.as_mut().unwrap();
@@ -233,36 +222,47 @@ impl MPS {
         Ok(())
     }
 
-    fn edit_by_number(&mut self, number: u32) -> io::Result<()> {
-        self.login()?;
-        let st = self.storage.as_mut().unwrap();
-        let id = st.get_id_by_number(number)?;
-        self.edit(&id)
-    }
-
+    // Delete item by id, is must exist
     fn delete(&mut self, id: &String) -> io::Result<()> {
         self.login()?;
         let st = self.storage.as_mut().unwrap();
-        if !st.contains(id) {
-            return Err(io::Error::new(
-                io::ErrorKind::InvalidInput,
-                "No such item"
-            ));
-        }
         st.remove(id);
         st.dump()?;
         Ok(())
     }
 
-    fn delete_by_number(&mut self, number: u32) -> io::Result<()> {
+    /// Resolve id by ItemArgs.
+    /// # Arguments
+    /// * `args` - arguments to parse
+    /// * `check` - check that id existing
+    fn item_id_by_item_id_args(&mut self, args: &ItemIdArgs, check: bool) -> io::Result<String> {
         self.login()?;
         let st = self.storage.as_mut().unwrap();
-        let id = st.get_id_by_number(number)?;
-        self.delete(&id)
+        let mut item_id: String = "NOT_INITIALIZED".to_string();
+        if let Some(id) = &args.id {
+            item_id = id.clone();
+            if check && !st.contains(&id) {
+                return Err(io::Error::new(
+                    io::ErrorKind::InvalidInput,
+                    format!("No such item {}", id)
+                ));
+            }
+        }
+        if let Some(number) = &args.number {
+            item_id = st.get_id_by_number(*number)?;
+            // we can guarantee that id exists because we take it by id
+        }
+        if args.id.is_none() && args.number.is_none() {
+             return Err(io::Error::new(
+                io::ErrorKind::InvalidInput,
+                format!("Bag arguments")
+            ));
+        }
+        Ok(item_id.clone())
     }
-
 }
 
+
 fn run_command() -> io::Result<()> {
     let cli = Cli::parse();
     match &cli.command {
@@ -273,36 +273,24 @@ fn run_command() -> io::Result<()> {
             let mut mps = MPS::new();
             mps.list()?;
         }
-        Some(Commands::Show(item)) => {
+        Some(Commands::Show(args)) => {
             let mut mps = MPS::new();
-            if let Some(id) = &item.id {
-                mps.show(id)?;
-            }
-            if let Some(number) = &item.number {
-                mps.show_by_number(*number)?;
-            }
+            let id = mps.item_id_by_item_id_args(args, true)?;
+            mps.show(&id)?;
         }
         Some(Commands::Add { id }) => {
             let mut mps = MPS::new();
             mps.add(id)?;
         }
-        Some(Commands::Edit(item)) => {
+        Some(Commands::Edit(args)) => {
             let mut mps = MPS::new();
-            if let Some(id) = &item.id {
-                mps.edit(id)?;
-            }
-            if let Some(number) = &item.number {
-                mps.edit_by_number(*number)?;
-            }
+            let id = mps.item_id_by_item_id_args(args, false)?;
+            mps.edit(&id)?;
         }
-        Some(Commands::Delete(item)) => {
+        Some(Commands::Delete(args)) => {
             let mut mps = MPS::new();
-            if let Some(id) = &item.id {
-                mps.delete(id)?
-            }
-            if let Some(number) = &item.number {
-                mps.delete_by_number(*number)?;
-            }
+            let id = mps.item_id_by_item_id_args(args, true)?;
+            mps.delete(&id)?;
         }
         None => {
             match Storage::check_installed() {