rework but everything is dyn

Cargo.lock

@@ -168,6 +168,8 @@ name = "filesystem"
 version = "0.1.0"
 dependencies = [
  "mlua",
+ "thiserror",
+ "walkdir",
  "zip",
 ]
 
@@ -349,6 +351,15 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "serde"
 version = "1.0.188"
@@ -408,6 +419,26 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "thiserror"
+version = "1.0.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d6d7a740b8a666a7e828dd00da9c0dc290dff53154ea77ac109281de90589b7"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49922ecae66cc8a249b77e68d1d0623c1b2c514f0060c27cdc68bd62a1219d35"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "time"
 version = "0.3.28"
@@ -443,6 +474,47 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
+[[package]]
+name = "walkdir"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d71d857dc86794ca4c280d616f7da00d2dbfd8cd788846559a6813e6aa4b54ee"
+dependencies = [
+ "same-file",
+ "winapi-util",
+]
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
 [[package]]
 name = "zip"
 version = "0.6.6"

lua/fs.example.lua

@@ -1 +1,7 @@
 local fs = require("filesystem")
+
+local root = fs.directory(".")
+
+for entry in root do
+    print(entry)
+end

lua_modules/filesystem/Cargo.toml

@@ -7,5 +7,7 @@ edition = "2021"
 crate-type = ["cdylib"]
 
 [dependencies]
+thiserror = "1.0.48"
 mlua = { workspace = true }
 zip = "0.6"
+walkdir = "2.4.0"

lua_modules/filesystem/src/driver_filesystem/directory_source.rs

@@ -0,0 +1,40 @@
+use crate::driver_filesystem::filesystem_resource::FilesystemResourceLocation;
+use crate::resource::{DynResource, DynResourceLocation, Resource, ResourceLocation};
+use crate::source::ResourceSource;
+use std::io::Sink;
+use std::path::PathBuf;
+use walkdir::WalkDir;
+
+pub struct DirectorySource {
+    location: String,
+    iter: walkdir::IntoIter,
+}
+impl DirectorySource {
+    pub fn open_dir(location: String) -> Self {
+        let iter = WalkDir::new(location.clone()).into_iter();
+        DirectorySource { location, iter }
+    }
+}
+
+impl ResourceSource for DirectorySource {
+    fn location(&self) -> DynResourceLocation {
+        Box::new(FilesystemResourceLocation::from(PathBuf::from(
+            self.location.clone(),
+        )))
+    }
+}
+
+impl Iterator for DirectorySource {
+    type Item = DynResourceLocation;
+    fn next(&mut self) -> Option<Self::Item> {
+        use crate::resource::ResourceLocation;
+        self.iter
+            .next()
+            .map(|entry| entry.unwrap())
+            .map(|entry| entry.path().to_path_buf())
+            .map(|entry| {
+                let loc = FilesystemResourceLocation::from(entry);
+                Box::new(loc) as Box<dyn ResourceLocation>
+            })
+    }
+}

lua_modules/filesystem/src/driver_filesystem/filesystem_resource.rs

@@ -0,0 +1,18 @@
+use crate::resource::ResourceLocation;
+use std::path::PathBuf;
+
+pub struct FilesystemResourceLocation {
+    path: PathBuf,
+}
+
+impl ResourceLocation for FilesystemResourceLocation {
+    fn location(&self) -> String {
+        self.path.display().to_string()
+    }
+}
+
+impl From<PathBuf> for FilesystemResourceLocation {
+    fn from(path: PathBuf) -> Self {
+        FilesystemResourceLocation { path }
+    }
+}

lua_modules/filesystem/src/driver_filesystem/mod.rs

@@ -0,0 +1,2 @@
+pub mod directory_source;
+pub mod filesystem_resource;

lua_modules/filesystem/src/error.rs

@@ -0,0 +1,16 @@
+use mlua::prelude::{LuaError, LuaResult};
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum FsError {
+    #[error("fs error happened: {msg}")]
+    GenericError { msg: String },
+}
+
+pub type Res<T = ()> = Result<T, FsError>;
+
+impl From<FsError> for LuaError {
+    fn from(fs_error: FsError) -> Self {
+        LuaError::RuntimeError(fs_error.to_string())
+    }
+}

lua_modules/filesystem/src/lib.rs

@@ -1,7 +1,24 @@
+mod driver_filesystem;
+mod driver_zip_archive;
+mod error;
+mod lua_bindings;
+mod operations;
+mod resource;
+mod sink;
+mod source;
+
+use crate::source::DynResourceSource;
+use driver_filesystem::directory_source::DirectorySource;
 use mlua::prelude::*;
 
+fn directory(lua: &Lua, path: String) -> LuaResult<DynResourceSource> {
+    let source = DirectorySource::open_dir(path);
+    Ok(Box::new(source))
+}
+
 #[mlua::lua_module]
 fn filesystem(lua: &Lua) -> LuaResult<LuaTable> {
     let exports = lua.create_table()?;
+    exports.set("directory", lua.create_function(directory)?)?;
     Ok(exports)
 }

lua_modules/filesystem/src/lua_bindings/mod.rs

@@ -0,0 +1,11 @@
+use crate::resource::DynResourceLocation;
+use mlua::{MetaMethod, UserData, UserDataFields, UserDataMethods};
+
+mod resource_bindings;
+mod source_bindings;
+
+impl UserData for DynResourceLocation {
+    fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
+        methods.add_meta_method_mut(MetaMethod::ToString, |lua, this, _: ()| Ok(this.location()));
+    }
+}

lua_modules/filesystem/src/lua_bindings/source_bindings.rs

@@ -0,0 +1,8 @@
+use crate::source::DynResourceSource;
+use mlua::{MetaMethod, UserData, UserDataMethods};
+
+impl UserData for DynResourceSource {
+    fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
+        methods.add_meta_method_mut(MetaMethod::Call, |lua, this, _: ()| Ok(this.next()));
+    }
+}

lua_modules/filesystem/src/operations/mod.rs

@@ -0,0 +1 @@
+mod operation_copy;

lua_modules/filesystem/src/operations/operation_copy.rs

@@ -0,0 +1,4 @@
+use crate::sink::DynResourceSink;
+use crate::source::DynResourceSource;
+
+pub fn copy_operation(from: DynResourceSource, to: DynResourceSink) {}

lua_modules/filesystem/src/resource/mod.rs

@@ -0,0 +1,17 @@
+use crate::sink::ResourceSink;
+use crate::source::ResourceSource;
+
+/// Points to a resource. Think of it as a path.
+pub trait ResourceLocation {
+    fn location(&self) -> String;
+}
+/// A concrete resource. Think of as a directory or a file
+pub trait Resource {}
+// A resource ready to be read. Think of it as a open file for reading
+pub trait ResourceInputStream: std::io::Read {}
+// A resource ready to be written. Think of it as a open file for reading
+pub trait ResourceOutputStream: std::io::Write {}
+pub type DynResource = Box<dyn Resource>;
+pub type DynResourceLocation = Box<dyn ResourceLocation>;
+pub type DynResourceInputStream = Box<dyn ResourceInputStream>;
+pub type DynResourceOutputStream = Box<dyn ResourceOutputStream>;

lua_modules/filesystem/src/sink/mod.rs

@@ -0,0 +1,4 @@
+use crate::resource::Resource;
+
+pub trait ResourceSink {}
+pub type DynResourceSink = Box<dyn ResourceSink>;

lua_modules/filesystem/src/source/mod.rs

@@ -0,0 +1,5 @@
+use crate::resource::{DynResource, DynResourceLocation};
+pub trait ResourceSource: Iterator<Item = DynResourceLocation> {
+    fn location(&self) -> DynResourceLocation;
+}
+pub type DynResourceSource = Box<dyn ResourceSource<Item = DynResourceLocation>>;