1 files changed, 80 insertions, 0 deletions

diff --git a/src/commands/list.rs b/src/commands/list.rs
new file mode 100644
index 0000000..6c260ce
--- /dev/null
+++ b/src/commands/list.rs
@@ -0,0 +1,80 @@
+use std::io::{Error, ErrorKind};
+
+use crate::{db::{insert_list, remove_list, change_list, get_lists, get_current_list}, Modloader, config::Cfg, input::Input};
+
+pub fn list(config: Cfg, args: Option<Vec<String>>) -> Result<(), Box<dyn std::error::Error>> {
+
+    if args.is_none() {
+        let lists = get_lists(config.clone())?;
+        let current_list = get_current_list(config)?;
+        println!("Your lists:\n{}\n-----\nCurrently selected list: \"{}\"", lists.join(",\n"), current_list);
+        return Ok(());
+    }
+
+    let arguments = Input::from(args.unwrap().join(" "))?;
+
+    if arguments.args.is_none() { return Err(Box::new(Error::new(ErrorKind::InvalidInput, "TOO_FEW_ARGUMENTS"))); };
+
+    match arguments.command.as_str() {
+        "add" => {
+            add(config, arguments.args.unwrap())
+        },
+        "change" => {
+            change(config, arguments.args.unwrap())
+        },
+        "remove" => {
+            remove(config, arguments.args.unwrap())
+        },
+        _ => Err(Box::new(Error::new(ErrorKind::InvalidInput, "UNKNOWN_SUBCOMMAND")))
+    }
+}
+
+fn add(config: Cfg, args: Vec<String>) -> Result<(), Box<dyn std::error::Error>> {
+    match args.len() {
+        1 | 2 => Err(Box::new(Error::new(ErrorKind::InvalidInput, "TOO_FEW_ARGUMENTS"))),
+        3 => {
+            let id = String::from(&args[0]);
+            let mc_version = String::from(&args[1]);
+            let mod_loader = match args[2].as_str() {
+                "forge" => Modloader::Forge,
+                "fabric" => Modloader::Fabric,
+                _ => return Err(Box::new(Error::new(ErrorKind::InvalidInput, "UNKNOWN_MODLOADER")))
+            };
+            match insert_list(config, id, mc_version, mod_loader) {
+                Err(err) => { Err(Box::new(err)) },
+                Ok(()) => Ok(()),
+            }
+        },
+        5.. => Err(Box::new(Error::new(ErrorKind::InvalidInput, "TOO_MANY_ARGUMENTS"))),
+        _ => panic!("list arguments should never be zero or lower"),
+    }
+}
+
+fn change(config: Cfg, args: Vec<String>) -> Result<(), Box<dyn std::error::Error>> {
+    let lists = get_lists(config.clone())?;
+    match args.len() {
+        1 => {
+            let list = String::from(&args[0]);
+            if !lists.contains(&list) { return Err(Box::new(Error::new(ErrorKind::NotFound, "LIST_DOESNT_EXIST"))); };
+            match change_list(config, list) {
+                Err(err) => { Err(Box::new(err)) },
+                Ok(()) => Ok(()),
+            }
+        },
+        2.. => Err(Box::new(Error::new(ErrorKind::InvalidInput, "TOO_MANY_ARGUMENTS"))),
+        _ => panic!("list arguments should never be zero or lower"),
+    }
+}
+
+fn remove(config: Cfg, args: Vec<String>) -> Result<(), Box<dyn std::error::Error>> {
+    match args.len() {
+        1 => {
+            match remove_list(config, String::from(&args[0])) {
+                Err(err) => { Err(Box::new(err)) },
+                Ok(()) => Ok(()),
+            }
+        },
+        2.. => Err(Box::new(Error::new(ErrorKind::InvalidInput, "TOO_MANY_ARGUMENTS"))),
+        _ => panic!("list arguments should never be zero or lower"),
+    }
+}