refactor: reorganize folder hierarchy

11 files changed, 747 insertions, 0 deletions

diff --git a/macros/Cargo.toml b/macros/Cargo.toml
new file mode 100644
index 0000000..74b4f91
--- /dev/null
+++ b/macros/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "syrette_macros"
+version = "0.1.0"
+license = "LGPL-2.1"
+authors = ["HampusM <hampus@hampusmat.com>"]
+description = "Macros for Syrette, the convenient dependency injection library"
+repository = "https://git.hampusmat.com/syrette"
+keywords = ["DI", "dependency-injection", "ioc", "inversion-of-control"]
+edition = "2021"
+
+[lib]
+proc_macro = true
+
+[dependencies]
+syn = { version = "1.0.96", features = ["full"] }
+quote = "1.0.18"
+proc-macro2 = "1.0.40"
+uuid = { version = "0.8", features = ["v4"] }
+
diff --git a/macros/src/declare_interface_args.rs b/macros/src/declare_interface_args.rs
new file mode 100644
index 0000000..b54f458
--- /dev/null
+++ b/macros/src/declare_interface_args.rs
@@ -0,0 +1,23 @@
+use syn::parse::{Parse, ParseStream, Result};
+use syn::{Path, Token, Type};
+
+pub struct DeclareInterfaceArgs
+{
+    pub implementation: Type,
+    pub interface: Path,
+}
+
+impl Parse for DeclareInterfaceArgs
+{
+    fn parse(input: ParseStream) -> Result<Self>
+    {
+        let implementation: Type = input.parse()?;
+
+        input.parse::<Token![->]>()?;
+
+        Ok(Self {
+            implementation,
+            interface: input.parse()?,
+        })
+    }
+}
diff --git a/macros/src/factory_type_alias.rs b/macros/src/factory_type_alias.rs
new file mode 100644
index 0000000..8ea7baa
--- /dev/null
+++ b/macros/src/factory_type_alias.rs
@@ -0,0 +1,84 @@
+use syn::parse::{Parse, ParseStream};
+use syn::{GenericArgument, ItemType, Path, Type, TypeParamBound, TypeTuple};
+
+pub struct FactoryTypeAlias
+{
+    pub type_alias: ItemType,
+    pub factory_interface: Path,
+    pub arg_types: TypeTuple,
+    pub return_type: Type,
+}
+
+impl Parse for FactoryTypeAlias
+{
+    #[allow(clippy::match_wildcard_for_single_variants)]
+    fn parse(input: ParseStream) -> syn::Result<Self>
+    {
+        let type_alias = match input.parse::<ItemType>() {
+            Ok(type_alias) => Ok(type_alias),
+            Err(_) => Err(input.error("Expected a type alias")),
+        }?;
+
+        let aliased_trait = match &type_alias.ty.as_ref() {
+            Type::TraitObject(alias_type) => Ok(alias_type),
+            &_ => Err(input.error("Expected the aliased type to be a trait")),
+        }?;
+
+        if aliased_trait.bounds.len() != 1 {
+            return Err(input.error("Expected the aliased trait to have a single bound."));
+        }
+
+        let bound_path = &match aliased_trait.bounds.first().unwrap() {
+            TypeParamBound::Trait(trait_bound) => Ok(trait_bound),
+            &_ => {
+                Err(input.error("Expected the bound of the aliased trait to be a trait"))
+            }
+        }?
+        .path;
+
+        if bound_path.segments.is_empty()
+            || bound_path.segments.last().unwrap().ident != "IFactory"
+        {
+            return Err(input
+                .error("Expected the bound of the aliased trait to be 'dyn IFactory'"));
+        }
+
+        let angle_bracketed_args = match &bound_path.segments.last().unwrap().arguments {
+            syn::PathArguments::AngleBracketed(angle_bracketed_args) => {
+                Ok(angle_bracketed_args)
+            }
+            &_ => {
+                Err(input.error("Expected angle bracketed arguments for 'dyn IFactory'"))
+            }
+        }?;
+
+        let arg_types = match &angle_bracketed_args.args[0] {
+            GenericArgument::Type(arg_types_type) => match arg_types_type {
+                Type::Tuple(arg_types) => Ok(arg_types),
+                &_ => Err(input.error(concat!(
+                    "Expected the first angle bracketed argument ",
+                    "of 'dyn IFactory' to be a type tuple"
+                ))),
+            },
+            &_ => Err(input.error(concat!(
+                "Expected the first angle bracketed argument ",
+                "of 'dyn IFactory' to be a type"
+            ))),
+        }?;
+
+        let return_type = match &angle_bracketed_args.args[1] {
+            GenericArgument::Type(arg_type) => Ok(arg_type),
+            &_ => Err(input.error(concat!(
+                "Expected the second angle bracketed argument ",
+                "of 'dyn IFactory' to be a type"
+            ))),
+        }?;
+
+        Ok(Self {
+            type_alias: type_alias.clone(),
+            factory_interface: bound_path.clone(),
+            arg_types: arg_types.clone(),
+            return_type: return_type.clone(),
+        })
+    }
+}
diff --git a/macros/src/injectable_impl.rs b/macros/src/injectable_impl.rs
new file mode 100644
index 0000000..3000253
--- /dev/null
+++ b/macros/src/injectable_impl.rs
@@ -0,0 +1,245 @@
+use quote::{quote, ToTokens};
+use syn::parse::{Parse, ParseStream};
+use syn::{
+    parse_str, punctuated::Punctuated, token::Comma, ExprMethodCall, FnArg,
+    GenericArgument, Ident, ImplItem, ImplItemMethod, ItemImpl, Path, PathArguments,
+    Type, TypePath,
+};
+
+const DI_CONTAINER_VAR_NAME: &str = "di_container";
+
+pub struct InjectableImpl
+{
+    pub dependency_types: Vec<Type>,
+    pub self_type: Type,
+    pub original_impl: ItemImpl,
+}
+
+impl Parse for InjectableImpl
+{
+    fn parse(input: ParseStream) -> syn::Result<Self>
+    {
+        match input.parse::<ItemImpl>() {
+            Ok(impl_parsed_input) => {
+                match Self::_get_dependency_types(&impl_parsed_input) {
+                    Ok(dependency_types) => Ok(Self {
+                        dependency_types,
+                        self_type: impl_parsed_input.self_ty.as_ref().clone(),
+                        original_impl: impl_parsed_input,
+                    }),
+                    Err(error_msg) => Err(input.error(error_msg)),
+                }
+            }
+            Err(_) => Err(input.error("Expected an impl")),
+        }
+    }
+}
+
+impl InjectableImpl
+{
+    pub fn expand(&self) -> proc_macro2::TokenStream
+    {
+        let original_impl = &self.original_impl;
+        let self_type = &self.self_type;
+
+        let di_container_var: Ident = parse_str(DI_CONTAINER_VAR_NAME).unwrap();
+
+        let get_dependencies = Self::_create_get_dependencies(&self.dependency_types);
+
+        quote! {
+            #original_impl
+
+            impl syrette::interfaces::injectable::Injectable for #self_type {
+                fn resolve(
+                    #di_container_var: &syrette::DIContainer
+                ) -> error_stack::Result<
+                    syrette::ptr::InterfacePtr<Self>,
+                    syrette::errors::injectable::ResolveError>
+                {
+                    use error_stack::ResultExt;
+
+                    return Ok(syrette::ptr::InterfacePtr::new(Self::new(
+                        #(#get_dependencies
+                            .change_context(syrette::errors::injectable::ResolveError)
+                            .attach_printable(
+                                format!(
+                                    "Unable to resolve a dependency of {}",
+                                    std::any::type_name::<#self_type>()
+                                )
+                            )?
+                        ),*
+                    )));
+                }
+            }
+        }
+    }
+
+    fn _create_get_dependencies(dependency_types: &[Type]) -> Vec<ExprMethodCall>
+    {
+        dependency_types
+            .iter()
+            .filter_map(|dep_type| match dep_type {
+                Type::TraitObject(dep_type_trait) => Some(
+                    parse_str(
+                        format!(
+                            "{}.get::<{}>()",
+                            DI_CONTAINER_VAR_NAME,
+                            dep_type_trait.to_token_stream()
+                        )
+                        .as_str(),
+                    )
+                    .unwrap(),
+                ),
+                Type::Path(dep_type_path) => {
+                    let dep_type_path_str = Self::_path_to_string(&dep_type_path.path);
+
+                    let get_method_name = if dep_type_path_str.ends_with("Factory") {
+                        "get_factory"
+                    } else {
+                        "get"
+                    };
+
+                    Some(
+                        parse_str(
+                            format!(
+                                "{}.{}::<{}>()",
+                                DI_CONTAINER_VAR_NAME, get_method_name, dep_type_path_str
+                            )
+                            .as_str(),
+                        )
+                        .unwrap(),
+                    )
+                }
+                &_ => None,
+            })
+            .collect()
+    }
+
+    fn _find_method_by_name<'impl_lt>(
+        item_impl: &'impl_lt ItemImpl,
+        method_name: &'static str,
+    ) -> Option<&'impl_lt ImplItemMethod>
+    {
+        let impl_items = &item_impl.items;
+
+        impl_items
+            .iter()
+            .filter_map(|impl_item| match impl_item {
+                ImplItem::Method(method_item) => Some(method_item),
+                &_ => None,
+            })
+            .find(|method_item| method_item.sig.ident == method_name)
+    }
+
+    #[allow(clippy::match_wildcard_for_single_variants)]
+    fn get_has_fn_args_self(fn_args: &Punctuated<FnArg, Comma>) -> bool
+    {
+        fn_args.iter().any(|arg| match arg {
+            FnArg::Receiver(_) => true,
+            &_ => false,
+        })
+    }
+
+    fn _get_fn_arg_type_paths(fn_args: &Punctuated<FnArg, Comma>) -> Vec<&TypePath>
+    {
+        fn_args
+            .iter()
+            .filter_map(|arg| match arg {
+                FnArg::Typed(typed_fn_arg) => match typed_fn_arg.ty.as_ref() {
+                    Type::Path(arg_type_path) => Some(arg_type_path),
+                    Type::Reference(ref_type_path) => match ref_type_path.elem.as_ref() {
+                        Type::Path(arg_type_path) => Some(arg_type_path),
+                        &_ => None,
+                    },
+                    &_ => None,
+                },
+                FnArg::Receiver(_receiver_fn_arg) => None,
+            })
+            .collect()
+    }
+
+    fn _path_to_string(path: &Path) -> String
+    {
+        path.segments
+            .pairs()
+            .fold(String::new(), |mut acc, segment_pair| {
+                let segment_ident = &segment_pair.value().ident;
+
+                acc.push_str(segment_ident.to_string().as_str());
+
+                let opt_colon_two = segment_pair.punct();
+
+                match opt_colon_two {
+                    Some(colon_two) => {
+                        acc.push_str(colon_two.to_token_stream().to_string().as_str());
+                    }
+                    None => {}
+                }
+
+                acc
+            })
+    }
+
+    fn _is_type_path_ptr(type_path: &TypePath) -> bool
+    {
+        let arg_type_path_string = Self::_path_to_string(&type_path.path);
+
+        arg_type_path_string == "InterfacePtr"
+            || arg_type_path_string == "ptr::InterfacePtr"
+            || arg_type_path_string == "syrrete::ptr::InterfacePtr"
+            || arg_type_path_string == "FactoryPtr"
+            || arg_type_path_string == "ptr::FactoryPtr"
+            || arg_type_path_string == "syrrete::ptr::FactoryPtr"
+    }
+
+    fn _get_dependency_types(item_impl: &ItemImpl) -> Result<Vec<Type>, &'static str>
+    {
+        let new_method_impl_item = match Self::_find_method_by_name(item_impl, "new") {
+            Some(method_item) => Ok(method_item),
+            None => Err("Missing a 'new' method"),
+        }?;
+
+        let new_method_args = &new_method_impl_item.sig.inputs;
+
+        if Self::get_has_fn_args_self(new_method_args) {
+            return Err("Unexpected self argument in 'new' method");
+        }
+
+        let new_method_arg_type_paths = Self::_get_fn_arg_type_paths(new_method_args);
+
+        if new_method_arg_type_paths
+            .iter()
+            .any(|arg_type_path| !Self::_is_type_path_ptr(arg_type_path))
+        {
+            return Err("All argument types in 'new' method must ptr types");
+        }
+
+        Ok(new_method_arg_type_paths
+            .iter()
+            .filter_map(|arg_type_path| {
+                // Assume the type path has a last segment.
+                let last_path_segment = arg_type_path.path.segments.last().unwrap();
+
+                match &last_path_segment.arguments {
+                    PathArguments::AngleBracketed(angle_bracketed_generic_args) => {
+                        let generic_args = &angle_bracketed_generic_args.args;
+
+                        let opt_first_generic_arg = generic_args.first();
+
+                        // Assume a first generic argument exists because InterfacePtr and
+                        // FactoryPtr requires one
+                        let first_generic_arg = opt_first_generic_arg.as_ref().unwrap();
+
+                        match first_generic_arg {
+                            GenericArgument::Type(first_generic_arg_type) => {
+                                Some(first_generic_arg_type.clone())
+                            }
+                            &_ => None,
+                        }
+                    }
+                    &_ => None,
+                }
+            })
+            .collect())
+    }
+}
diff --git a/macros/src/injectable_macro_args.rs b/macros/src/injectable_macro_args.rs
new file mode 100644
index 0000000..4ef4389
--- /dev/null
+++ b/macros/src/injectable_macro_args.rs
@@ -0,0 +1,17 @@
+use syn::parse::{Parse, ParseStream};
+use syn::TypePath;
+
+pub struct InjectableMacroArgs
+{
+    pub interface: TypePath,
+}
+
+impl Parse for InjectableMacroArgs
+{
+    fn parse(input: ParseStream) -> syn::Result<Self>
+    {
+        Ok(Self {
+            interface: input.parse()?,
+        })
+    }
+}
diff --git a/macros/src/lib.rs b/macros/src/lib.rs
new file mode 100644
index 0000000..ed1a509
--- /dev/null
+++ b/macros/src/lib.rs
@@ -0,0 +1,96 @@
+#![deny(clippy::all)]
+#![deny(clippy::pedantic)]
+
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{parse, parse_macro_input};
+
+mod declare_interface_args;
+mod factory_type_alias;
+mod injectable_impl;
+mod injectable_macro_args;
+mod libs;
+
+use declare_interface_args::DeclareInterfaceArgs;
+use factory_type_alias::FactoryTypeAlias;
+use injectable_impl::InjectableImpl;
+use injectable_macro_args::InjectableMacroArgs;
+use libs::intertrait_macros::gen_caster::generate_caster;
+
+/// Makes a struct injectable. Thereby usable with `DIContainer`.
+///
+/// # Arguments
+/// * A interface trait the struct implements.
+///
+/// # Panics
+/// If the attributed item is not a impl.
+#[proc_macro_attribute]
+pub fn injectable(args_stream: TokenStream, impl_stream: TokenStream) -> TokenStream
+{
+    let InjectableMacroArgs {
+        interface: interface_type_path,
+    } = parse_macro_input!(args_stream);
+
+    let injectable_impl: InjectableImpl = parse(impl_stream).unwrap();
+
+    let expanded_injectable_impl = injectable_impl.expand();
+
+    let self_type = &injectable_impl.self_type;
+
+    quote! {
+        #expanded_injectable_impl
+
+        syrette::declare_interface!(#self_type -> #interface_type_path);
+    }
+    .into()
+}
+
+/// Makes a type alias usable as a factory interface.
+///
+/// # Panics
+/// If the attributed item is not a type alias.
+#[proc_macro_attribute]
+pub fn factory(_: TokenStream, type_alias_stream: TokenStream) -> TokenStream
+{
+    let FactoryTypeAlias {
+        type_alias,
+        factory_interface,
+        arg_types,
+        return_type,
+    } = parse(type_alias_stream).unwrap();
+
+    quote! {
+        #type_alias
+
+        syrette::declare_interface!(
+            syrette::castable_factory::CastableFactory<
+                #arg_types,
+                #return_type
+            > -> #factory_interface
+        );
+
+        syrette::declare_interface!(
+            syrette::castable_factory::CastableFactory<
+                #arg_types,
+                #return_type
+            > -> syrette::castable_factory::AnyFactory
+        );
+    }
+    .into()
+}
+
+/// Declares the interface trait of a implementation.
+///
+/// # Arguments
+/// {Implementation} -> {Interface}
+///
+#[proc_macro]
+pub fn declare_interface(input: TokenStream) -> TokenStream
+{
+    let DeclareInterfaceArgs {
+        implementation,
+        interface,
+    } = parse_macro_input!(input);
+
+    generate_caster(&implementation, &interface).into()
+}
diff --git a/macros/src/libs/intertrait_macros/LICENSE-APACHE b/macros/src/libs/intertrait_macros/LICENSE-APACHE
new file mode 100644
index 0000000..d9a10c0
--- /dev/null
+++ b/macros/src/libs/intertrait_macros/LICENSE-APACHE
@@ -0,0 +1,176 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
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+      and distribution as defined by Sections 1 through 9 of this document.
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+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
diff --git a/macros/src/libs/intertrait_macros/LICENSE-MIT b/macros/src/libs/intertrait_macros/LICENSE-MIT
new file mode 100644
index 0000000..969d061
--- /dev/null
+++ b/macros/src/libs/intertrait_macros/LICENSE-MIT
@@ -0,0 +1,17 @@
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/macros/src/libs/intertrait_macros/gen_caster.rs b/macros/src/libs/intertrait_macros/gen_caster.rs
new file mode 100644
index 0000000..9126200
--- /dev/null
+++ b/macros/src/libs/intertrait_macros/gen_caster.rs
@@ -0,0 +1,55 @@
+/**
+ * Originally from Intertrait by CodeChain
+ *
+ * <https://github.com/CodeChain-io/intertrait>
+ * <https://crates.io/crates/intertrait/0.2.2>
+ *
+ * Licensed under either of
+ *
+ * Apache License, Version 2.0 (LICENSE-APACHE or <http://www.apache.org/licenses/LICENSE-2.0>)
+ * MIT license (LICENSE-MIT or <http://opensource.org/licenses/MIT>)
+
+ * at your option.
+*/
+use std::str::from_utf8_unchecked;
+
+use proc_macro2::TokenStream;
+use quote::format_ident;
+use quote::quote;
+use quote::ToTokens;
+use uuid::adapter::Simple;
+use uuid::Uuid;
+
+pub fn generate_caster(ty: &impl ToTokens, trait_: &impl ToTokens) -> TokenStream
+{
+    let mut fn_buf = [0u8; FN_BUF_LEN];
+
+    let fn_ident = format_ident!("{}", new_fn_name(&mut fn_buf));
+
+    let new_caster = quote! {
+        syrette::libs::intertrait::Caster::<dyn #trait_>::new(
+            |from| from.downcast::<#ty>().unwrap(),
+            |from| from.downcast::<#ty>().unwrap(),
+        )
+    };
+
+    quote! {
+        #[syrette::libs::linkme::distributed_slice(syrette::libs::intertrait::CASTERS)]
+        #[linkme(crate = syrette::libs::linkme)]
+        fn #fn_ident() -> (::std::any::TypeId, syrette::libs::intertrait::BoxedCaster) {
+            (::std::any::TypeId::of::<#ty>(), Box::new(#new_caster))
+        }
+    }
+}
+
+const FN_PREFIX: &[u8] = b"__";
+const FN_BUF_LEN: usize = FN_PREFIX.len() + Simple::LENGTH;
+
+fn new_fn_name(buf: &mut [u8]) -> &str
+{
+    buf[..FN_PREFIX.len()].copy_from_slice(FN_PREFIX);
+    Uuid::new_v4()
+        .to_simple()
+        .encode_lower(&mut buf[FN_PREFIX.len()..]);
+    unsafe { from_utf8_unchecked(&buf[..FN_BUF_LEN]) }
+}
diff --git a/macros/src/libs/intertrait_macros/mod.rs b/macros/src/libs/intertrait_macros/mod.rs
new file mode 100644
index 0000000..fa8c021
--- /dev/null
+++ b/macros/src/libs/intertrait_macros/mod.rs
@@ -0,0 +1,14 @@
+/**
+ * Originally from Intertrait by CodeChain
+ *
+ * <https://github.com/CodeChain-io/intertrait>
+ * <https://crates.io/crates/intertrait/0.2.2>
+ *
+ * Licensed under either of
+ *
+ * Apache License, Version 2.0 (LICENSE-APACHE or <http://www.apache.org/licenses/LICENSE-2.0>)
+ * MIT license (LICENSE-MIT or <http://opensource.org/licenses/MIT>)
+
+ * at your option.
+*/
+pub mod gen_caster;
diff --git a/macros/src/libs/mod.rs b/macros/src/libs/mod.rs
new file mode 100644
index 0000000..e4964de
--- /dev/null
+++ b/macros/src/libs/mod.rs
@@ -0,0 +1 @@
+pub mod intertrait_macros;