diff --git a/src/main.rs b/src/main.rs
index 93ac7c0..c76ddf6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,28 @@
+use std::unimplemented;
+
+use clap::{Args, Parser, Subcommand};
+
+#[derive(Parser)]
+#[command(author, version, about, long_about = None)]
+#[command(propagate_version = true)]
+struct Cli {
+    #[command(subcommand)]
+    command: Commands,
+}
+
+#[derive(Subcommand)]
+enum Commands {
+    Download(MapList),
+    Scan,
+    Replace,
+    Upload,
+}
+
+#[derive(Args)]
+struct MapList {
+    maps: Vec<u64>,
+}
+
 fn class_is_a(class: &str, superclass: &str) -> bool {
     if class==superclass {
         return true
@@ -11,6 +36,19 @@ fn class_is_a(class: &str, superclass: &str) -> bool {
     return false
 }
 
+//download
+    //download list of maps to maps/unprocessed
+//scan (scripts)
+    //iter maps/unprocessed
+    //passing moves to maps/verified
+    //failing moves to maps/purgatory
+//replace (edits & deletions)
+    //iter maps/purgatory
+    //replace scripts and put in maps/unprocessed
+//upload
+    //iter maps/verified
+    //interactively print DisplayName/Creator and ask for target upload ids
+
 fn get_scripts(dom:rbx_dom_weak::WeakDom) -> Vec<rbx_dom_weak::Instance>{
     let mut scripts = std::vec::Vec::<rbx_dom_weak::Instance>::new();
 
@@ -23,19 +61,33 @@ fn get_scripts(dom:rbx_dom_weak::WeakDom) -> Vec<rbx_dom_weak::Instance>{
     scripts
 }
 
-fn main() -> Result<(), Box<dyn std::error::Error>> {
-    // Using buffered I/O is recommended with rbx_binary
-    let input = std::io::BufReader::new(std::fs::File::open("map.rbxm")?);
-
-    let dom = rbx_binary::from_reader(input)?;
-
+fn download(map_list: Vec<u64>) -> Result<(), Box<dyn std::error::Error>>{
+    unimplemented!()
+}
+fn scan() -> Result<(), Box<dyn std::error::Error>>{
+    let mut id = 0u32;
+    match std::fs::read_to_string("id"){
+        Ok(id_file)=>id=id_file.parse::<u32>()?,
+        Err(e) => match e.kind() {
+            std::io::ErrorKind::NotFound => println!("id file does not exist: starting from 0"),//continue on, implicitly take on id=0, write the id file at the end
+            _ => return Err(e)?,
+        }
+    }
     //Construct allowed scripts
-    let mut allowed = std::collections::HashSet::<String>::new();
-    for entry in std::fs::read_dir("allowed")? {
-        allowed.insert(std::fs::read_to_string(entry?.path())?);
+    let mut allowed_set = std::collections::HashSet::<String>::new();
+    for entry in std::fs::read_dir("scripts/allowed")? {
+        allowed_set.insert(std::fs::read_to_string(entry?.path())?);
+    }
+    let mut blocked = std::collections::HashSet::<String>::new();
+    for entry in std::fs::read_dir("scripts/blocked")? {
+        blocked.insert(std::fs::read_to_string(entry?.path())?);
     }
 
+    for entry in std::fs::read_dir("maps/unprocessed")? {
+        let file_thing=entry?;
+        let input = std::io::BufReader::new(std::fs::File::open(file_thing.path())?);
 
+        let dom = rbx_binary::from_reader(input)?;
 
         let scripts = get_scripts(dom);
 
@@ -43,32 +95,103 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         let mut any_failed=false;
         for script in scripts.iter() {
             if let Some(rbx_dom_weak::types::Variant::String(s)) = script.properties.get("Source") {
-                if allowed.contains(s) {
+                if allowed_set.contains(s) {
                     println!("pass");
+                    continue;
                 }else{
                     println!("fail");
                     any_failed=true;
-                    std::fs::write(format!("blocked/{}.lua",i),s)?;
+                    if !blocked.contains(s) {
+                        blocked.insert(s.clone());//all fixed! just clone!
+                        std::fs::write(format!("scripts/blocked/{}.lua",id),s)?;
+                        id+=1;
+                    }
                 }
             }else{
                 println!("failed to get source");
                 any_failed=true;
             }
+        }
+        if any_failed {
+            println!("One or more scripts are not allowed.");
         }else{
-            println!("failed to deref script");
-            any_failed=true;
+            let mut dest=std::path::PathBuf::from("maps/processed");
+            dest.set_file_name(file_thing.file_name());
+            dest.set_extension("rbxl");//extension is always rbxl even if source file is extensionless
+            std::fs::rename(file_thing.path(), dest)?;
         }
     }
-    if any_failed {
-        println!("One or more scripts are not allowed.");
-        return Ok(())//everything is not ok but idk how to return an error LMAO
+    std::fs::write("id",id.to_string())?;
+    Ok(())
+}
+fn replace() -> Result<(), Box<dyn std::error::Error>>{
+    //Construct allowed scripts
+    let mut allowed_map = std::collections::HashMap::<u32,String>::new();
+    for entry in std::fs::read_dir("scripts/allowed")? {
+        let entry=entry?;
+        allowed_map.insert(entry.file_name().to_str().unwrap().parse::<u32>()?,std::fs::read_to_string(entry.path())?);
     }
-    println!("All scripts passed!");
+    let mut replace = std::collections::HashMap::<String,u32>::new();
+    for entry in std::fs::read_dir("scripts/replace")? {
+        let entry=entry?;
+        replace.insert(std::fs::read_to_string(entry.path())?,entry.file_name().to_str().unwrap().parse::<u32>()?);
+    }
+
+    for entry in std::fs::read_dir("maps/purgatory")? {
+        let file_thing=entry?;
+        let input = std::io::BufReader::new(std::fs::File::open(file_thing.path())?);
+
+        let dom = rbx_binary::from_reader(input)?;
+
+        let mut write_dom = rbx_dom_weak::WeakDom::new(rbx_dom_weak::InstanceBuilder::empty());
+        dom.clone_into_external(dom.root_ref(), &mut write_dom);
+
+        let scripts = get_scripts(dom);
+
+        //check scribb
+        let mut any_failed=false;
+        for script in scripts.iter() {
+            if let Some(rbx_dom_weak::types::Variant::String(source)) = script.properties.get("Source") {
+                if let (Some(replace_id),Some(replace_script))=(replace.get(source),write_dom.get_by_ref_mut(script.referent())) {
+                    println!("replace {}",replace_id);
+                    //replace the source
+                    if let Some(replace_source)=allowed_map.get(replace_id){
+                        replace_script.properties.insert("Source".to_string(), rbx_dom_weak::types::Variant::String(replace_source.clone()));
+                    }else{
+                        println!("failed to get replacement source {}",replace_id);
+                        any_failed=true;
+                    }
+                }
+            }
+        }
+        if any_failed {
+            println!("One or more scripts failed to replace.");
+        }else{
+            let mut dest=std::path::PathBuf::from("maps/unprocessed");
+            dest.set_file_name(file_thing.file_name());
+            dest.set_extension("rbxl");//extension is always rbxl even if source file is extensionless
+            let output = std::io::BufWriter::new(std::fs::File::open(dest)?);
+            rbx_binary::to_writer(output, &write_dom, &[write_dom.root_ref()])?;
+        }
+    }
+    Ok(())
+}
+fn upload() -> Result<(), Box<dyn std::error::Error>>{
     // std::process::Command::new("rbxcompiler")
     // .arg("--compile=false")
     // .arg("--group=6980477")
     // .arg("--asset=5692139100")
     // .arg("--input=map.rbxm")
     // .spawn()?;
-    Ok(())
+    unimplemented!()
+}
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let cli = Cli::parse();
+    match cli.command {
+        Commands::Download(map_list)=>download(map_list.maps),
+        Commands::Scan=>scan(),
+        Commands::Replace=>replace(),
+        Commands::Upload=>upload(),
+    }
 }