item: Implement undo command

Brand new feature! Now you can easily undo your last action using "vento
-u". While not a fully-fledged history, if you messed something up
during your last action, you can now easily undo it! Thank you
@Ephera@lemmy.ml for the suggestion!
(https://slrpnk.net/post/103331/comment/24020)

src/bin/drop.rs

@@ -30,11 +30,11 @@ fn main() -> Result<()> {
         if args[1].contains("--slot=") {
             // Checks if the user has provided the long argument "--slot="
             match args.len() {
-                4 => item::drop(&args[2], &args[1].as_str().replace("--slot=", ""), Path::new(&args[4]).to_path_buf())?,
+                4 => item::drop(&args[2], &args[1].as_str().replace("--slot=", ""), Path::new(&args[4]).to_path_buf(), true)?,
                 3 => item::drop(&args[2], &args[1].as_str().replace("--slot=", ""), match env::current_dir() {
                     Ok(dir) => dir,
                     Err(_) => bail!("{}", "Vento was unable to detect your current directory. Have you configured your environment correctly?".red())
-                })?,
+                }, true)?,
                 2 => bail!("{}", "You need to specify a file".red()),
                 _ => bail!("{}", "Too many arguments".red()),
             };
@@ -42,21 +42,21 @@ fn main() -> Result<()> {
             match args[1].as_str() {
                 "--help" | "-h" => help::drop()?,
                 "-s" => match args.len() {
-                    5 => item::drop(&args[3], &args[2], Path::new(&args[4]).to_path_buf())?,
+                    5 => item::drop(&args[3], &args[2], Path::new(&args[4]).to_path_buf(), true)?,
                     4 => item::drop(&args[3], &args[2], match env::current_dir() {
                         Ok(dir) => dir,
                         Err(_) => bail!("{}", "Vento was unable to detect your current directory. Have you configured your environment correctly?".red())
-                    })?,
+                    }, true)?,
                     3 => bail!("{}", "You need to specify a file".red()),
                     2 => bail!("{}", "You need to specify a slot".red()),
                     _ => bail!("{}", "Too many arguments".red()),
                 },
                 _ => match args.len() {
-                    3 => item::drop(&args[1], &String::from("active"), Path::new(&args[2]).to_path_buf())?,
+                    3 => item::drop(&args[1], &String::from("active"), Path::new(&args[2]).to_path_buf(), true)?,
                     2 => item::drop(&args[1], &String::from("active"), match env::current_dir() {
                         Ok(dir) => dir,
                         Err(_) => bail!("{}", "Vento was unable to detect your current directory. Have you configured your environment correctly?".red())
-                    })?,
+                    }, true)?,
                     _ => bail!("{}", "Too many arguments".red()),
                 },
             }

src/bin/take.rs

@@ -29,7 +29,7 @@ fn main() -> Result<()> {
         if args[1].contains("--slot=") {
             // Checks if the user has provided the long argument "--slot="
             match args.len() {
-                3 => item::take(&args[2], &args[1].replace("--slot=", ""))?,
+                3 => item::take(&args[2], &args[1].replace("--slot=", ""), true)?,
                 2 => bail!("{}", "You need to specify a file".red()),
                 _ => bail!("{}", "Too many arguments".red()),
             };
@@ -37,13 +37,13 @@ fn main() -> Result<()> {
             match args[1].as_str() {
                 "--help" | "-h" => help::take()?,
                 "-s" => match args.len() {
-                    4 => item::take(&args[3], &args[2])?,
+                    4 => item::take(&args[3], &args[2], true)?,
                     3 => bail!("{}", "You need to specify a file".red()),
                     2 => bail!("{}", "You need to specify a slot".red()),
                     _ => bail!("{}", "Too many arguments".red()),
                 },
                 _ => match args.len() {
-                    2 => item::take(&args[1], &String::from("active"))?,
+                    2 => item::take(&args[1], &String::from("active"), true)?,
                     _ => bail!("{}", "Too many arguments".red()),
                 },
             }

src/bin/vento.rs

@@ -20,7 +20,7 @@
 use anyhow::{bail, Result};
 use colored::Colorize;
 use std::env;
-use vento::{help, inv};
+use vento::{help, inv, item};
 
 fn main() -> Result<()> {
     // Handles args in Vento
@@ -39,6 +39,7 @@ fn main() -> Result<()> {
                 "-h" | "--help" => help::vento()?,
                 "-i" | "--init" => inv::init()?,
                 "-c" | "--switch" => inv::switch()?,
+                "-u" | "--undo" => item::undo()?,
                 "-s" => match args.len() {
                     4 => inv::list(&args[2], &args[3])?,
                     3 => inv::list(&args[2], "")?,

src/common.rs

@@ -33,6 +33,7 @@ pub struct Settings {
 pub struct HistoryData {
     pub path: PathBuf,
     pub file: String,
+    pub slot: String,
     pub action: Action,
 }
 
@@ -108,9 +109,11 @@ pub fn history(data: HistoryData) -> Result<()> {
         &mut last_file,
         "{}
 {}
+{}
 {}",
         data.path.to_str().unwrap(),
         data.file,
+        data.slot,
         match data.action {
             Action::Take => "take",
             Action::Drop => "drop",

src/item.rs

@@ -24,7 +24,7 @@ use fs_extra::dir::{move_dir, CopyOptions};
 use std::fs;
 use std::path::{Path, PathBuf};
 
-pub fn take(file: &String, slot: &str) -> Result<()> {
+pub fn take(file: &String, slot: &str, message: bool) -> Result<()> {
     // Takes a file or directory
     let ventodir = &common::env_config()?.vento_dir;
 
@@ -58,7 +58,9 @@ pub fn take(file: &String, slot: &str) -> Result<()> {
     let mut sourcelocation: PathBuf = fs::canonicalize(&sourcepath)?;
     sourcelocation.pop();
     let filename = Path::new(&file).file_name().unwrap().to_str().unwrap();
-    let destpath: PathBuf = [&slotdir, &sourcepath].iter().collect();
+    let destpath: PathBuf = [&slotdir, &Path::new(&filename).to_path_buf()]
+        .iter()
+        .collect();
 
     if Path::exists(&destpath) {
         // Checks if there's a file with the same name in the inventory.
@@ -82,20 +84,23 @@ pub fn take(file: &String, slot: &str) -> Result<()> {
     common::history(common::HistoryData {
         path: sourcelocation.clone(),
         file: String::from(filename),
+        slot: String::from(slot),
         action: common::Action::Take,
     })?;
 
+    if message {
         println!(
             "✅ {} {} {} ",
             "Took".green(),
             &filename.bold(),
             format!("from {}", &sourcelocation.to_str().unwrap()).green()
         );
+    }
 
     Ok(())
 }
 
-pub fn drop(file: &String, slot: &str, dest: PathBuf) -> Result<()> {
+pub fn drop(file: &String, slot: &str, dest: PathBuf, message: bool) -> Result<()> {
     // Drops a file or directory
     let ventodir = &common::env_config()?.vento_dir;
 
@@ -156,15 +161,55 @@ pub fn drop(file: &String, slot: &str, dest: PathBuf) -> Result<()> {
     common::history(common::HistoryData {
         path: destpath.clone(),
         file: String::from(file),
+        slot: String::from(slot),
         action: common::Action::Drop,
     })?;
 
+    if message {
         println!(
             "✅ {} {} {} ",
             "Dropped".green(),
             &file.bold(),
             format!("into {}", &destpath.to_str().unwrap()).green()
         );
+    };
+
+    Ok(())
+}
+
+pub fn undo() -> Result<()> {
+    let lastpath: PathBuf = [
+        common::env_config()?.vento_dir,
+        Path::new("last").to_path_buf(),
+    ]
+    .iter()
+    .collect();
+
+    let lastfile = fs::read_to_string(lastpath)?;
+
+    let mut contents = vec![];
+
+    for line in lastfile.lines() {
+        contents.push(line);
+    }
+
+    if contents.len() != 4 {
+        bail!("Invalid history length".red());
+    }
+
+    match contents[3] {
+        "take" => {
+            let destpath = Path::new(contents[0]).to_path_buf();
+            drop(&String::from(contents[1]), contents[2], destpath, false)?;
+        }
+        "drop" => {
+            let path = vec![contents[0], contents[1]].join("/");
+            take(&path, contents[2], false)?;
+        }
+        _ => bail!("Illegal action".red()),
+    }
+
+    println!("✅ {}", "Last action undone".green(),);
 
     Ok(())
 }