src/cli/add.rs

@@ -16,14 +16,14 @@ pub fn execute(repo: impl Repository, args: Args) {
 
     match res {
         Ok(task) => {
-            println!("Task was added successfully");
+            println!("The task was added successfully");
             println!("  {}", task.name);
             if let Some(link) = task.link {
                 println!("  link: {}", link);
             }
         }
         Err(err) => {
-            eprintln!("Cannot insert data: {}", err);
+            eprintln!("Cannot insert a new task: {}", err);
         }
     }
 

src/cli/edit.rs

@@ -1,7 +1,7 @@
 use std::io::Write;
-use std::path::PathBuf;
 
-use crate::{CurrentTaskInfo, Task};
+use crate::repo::{self, Repository};
+use crate::CurrentTaskInfo;
 
 #[derive(clap::Args)]
 pub struct Args {
@@ -19,33 +19,32 @@ pub struct Args {
 pub struct Request {
     pub args: Args,
     pub current_task_info: Option<CurrentTaskInfo>,
-    pub tasks: Vec<Task>,
-    pub tasks_file_path: PathBuf,
 }
 
-pub fn execute(mut req: Request) {
+pub fn execute(repo: impl Repository, mut req: Request) {
     if req.current_task_info.is_some() {
         panic!("You can edit task only when you don't have an active task, yet");
     }
 
-    let idx = req.args.idx;
+    let args = req.args;
-    if idx == 0 || idx > req.tasks.len() {
-        panic!("invalid index");
-    }
 
-    let mut task = &mut req.tasks[idx - 1];
+    let res = repo.update_task(
-    if let Some(name) = req.args.name {
+        args.idx,
-        task.name = name;
+        repo::UpdateTaskData {
+            name: args.name,
+            link: args.no_link.then(|| None).or(args.link.map(Some)),
+        },
+    );
+    match res {
+        Ok(task) => {
+            println!("The task was changed successfully");
+            println!("  {}", task.name);
+            if let Some(link) = task.link {
+                println!("  link: {}", link);
+            }
+        }
+        Err(err) => {
+            eprintln!("Cannot update the task: {}", err);
         }
-    if let Some(link) = req.args.link {
-        task.link = Some(link);
-    } else if req.args.no_link {
-        task.link = None;
     }
-
-    let mut file = std::fs::File::create(&req.tasks_file_path).unwrap();
-    file.write_all(&serde_json::to_vec(&req.tasks).unwrap())
-        .unwrap();
-
-    println!("changed");
 }

src/domain.rs

@@ -1,3 +1,5 @@
+pub type TaskId = usize;
+
 pub struct Task {
     pub name: String,
     pub link: Option<String>,

src/main.rs

@@ -55,12 +55,13 @@ fn main() {
             cli::add::execute(repo, args);
         }
         cli::SubCommand::Edit(args) => {
-            cli::edit::execute(cli::edit::Request {
+            cli::edit::execute(
+                repo,
+                cli::edit::Request {
                     args,
                     current_task_info,
-                tasks,
+                },
-                tasks_file_path,
+            );
-            });
         }
         cli::SubCommand::Remove(args) => {
             cli::remove::execute(cli::remove::Request {

src/repo.rs

@@ -26,8 +26,19 @@ pub struct InsertTaskData {
     link: Option<String>,
 }
 
+pub struct UpdateTaskData {
+    name: Option<String>,
+    link: Option<Option<String>>,
+}
+
 pub trait Repository {
     fn get_tasks(&self) -> Result<Vec<domain::Task>, Error>;
 
+    fn update_task(
+        &self,
+        id: domain::TaskId,
+        update_data: UpdateTaskData,
+    ) -> Result<domain::Task, Error>;
+
     fn insert_task(&self, insert_data: InsertTaskData) -> Result<domain::Task, Error>;
 }

src/repo/fs.rs

@@ -2,7 +2,7 @@ use std::fs::File;
 use std::io::Write;
 
 use crate::domain;
-use crate::repo::{Error, InsertTaskData, Repository};
+use crate::repo::{Error, InsertTaskData, Repository, UpdateTaskData};
 
 use serde::{Deserialize, Serialize};
 use xdg::BaseDirectories;
@@ -41,6 +41,32 @@ impl Repository for FsRepo {
             .map(|tasks| tasks.into_iter().map(Task::into).collect())
     }
 
+    fn update_task(
+        &self,
+        id: domain::TaskId,
+        update_data: UpdateTaskData,
+    ) -> Result<domain::Task, Error> {
+        let mut tasks = self.get_tasks_impl()?;
+        if id == 0 || id > tasks.len() {
+            return Err(Error::NotFound);
+        }
+
+        let mut task = &mut tasks[id];
+        if let Some(name) = update_data.name {
+            task.name = name;
+        }
+
+        if let Some(link) = update_data.link {
+            task.link = link;
+        }
+
+        let new_task = task.clone();
+
+        self.save_tasks_impl(tasks)?;
+
+        Ok(new_task.into())
+    }
+
     fn insert_task(&self, insert_data: InsertTaskData) -> Result<domain::Task, Error> {
         let new_task = Task {
             name: insert_data.name,
@@ -50,13 +76,7 @@ impl Repository for FsRepo {
         let mut tasks = self.get_tasks_impl()?;
         tasks.push(new_task.clone());
 
-        let file_path = self
+        self.save_tasks_impl(tasks)?;
-            .xdg_dirs
-            .place_data_file(DATA_FILE)
-            .map_err(|_| Error::InsertData)?;
-        let mut file = File::create(&file_path).map_err(|_| Error::InsertData)?;
-        let new_data = serde_json::to_vec(&tasks).map_err(|_| Error::InvalidData)?;
-        file.write_all(&new_data).map_err(|_| Error::InsertData);
 
         Ok(new_task.into())
     }
@@ -69,4 +89,14 @@ impl FsRepo {
             .map_err(|_| Error::NotFound)
             .and_then(|file| serde_json::from_reader(file).map_err(|_| Error::InvalidData))
     }
+
+    fn save_tasks_impl(&self, tasks: Vec<Task>) -> Result<(), Error> {
+        let file_path = self
+            .xdg_dirs
+            .place_data_file(DATA_FILE)
+            .map_err(|_| Error::InsertData)?;
+        let mut file = File::create(&file_path).map_err(|_| Error::InsertData)?;
+        let new_data = serde_json::to_vec(&tasks).map_err(|_| Error::InvalidData)?;
+        file.write_all(&new_data).map_err(|_| Error::InsertData)
+    }
 }