item: Store last action

This is part of a user-suggested feature made by @Ephera@lemmy.ml over
on Lemmy (https://slrpnk.net/post/103331/comment/24020). It stores the
last action so it can later be undone by the user. Maybe if I feel
generous I might store a longer history in an SQLite database, but for
now a simple text file will do. The command for undoing will follow.

src/common.rs

@@ -20,6 +20,8 @@
 use anyhow::{bail, Result};
 use colored::Colorize;
 use config::Config;
+use std::fs::File;
+use std::io::Write;
 use std::path::{Path, PathBuf};
 
 pub struct Settings {
@@ -28,6 +30,17 @@ pub struct Settings {
     pub inactive_dir: PathBuf,
 }
 
+pub struct HistoryData {
+    pub path: PathBuf,
+    pub file: String,
+    pub action: Action,
+}
+
+pub enum Action {
+    Take,
+    Drop,
+}
+
 pub fn env_config() -> Result<Settings> {
     // Configures the directories for Vento
     let home = match dirs::home_dir() {
@@ -85,3 +98,24 @@ fn dir_config() -> Result<String> {
 
     Ok(result)
 }
+
+pub fn history(data: HistoryData) -> Result<()> {
+    let mut last_path = env_config()?.vento_dir;
+    last_path.push("last");
+    let mut last_file = File::create(last_path)?;
+
+    write!(
+        &mut last_file,
+        "{}
+{}
+{}",
+        data.path.to_str().unwrap(),
+        data.file,
+        match data.action {
+            Action::Take => "take",
+            Action::Drop => "drop",
+        }
+    )?;
+
+    Ok(())
+}

src/item.rs

@@ -79,6 +79,12 @@ pub fn take(file: &String, slot: &str) -> Result<()> {
         bail!("{}", "No such file or directory.".red());
     }
 
+    common::history(common::HistoryData {
+        path: sourcelocation.clone(),
+        file: String::from(filename),
+        action: common::Action::Take,
+    })?;
+
     println!(
         "✅ {} {} {} ",
         "Took".green(),
@@ -147,6 +153,12 @@ pub fn drop(file: &String, slot: &str, dest: PathBuf) -> Result<()> {
 
     destpath.pop();
 
+    common::history(common::HistoryData {
+        path: destpath.clone(),
+        file: String::from(file),
+        action: common::Action::Drop,
+    })?;
+
     println!(
         "✅ {} {} {} ",
         "Dropped".green(),