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use syn::Type;
#[derive(Debug)]
pub struct TypescriptType {
pub typescript_type: String,
pub is_optional: bool,
}
impl TypescriptType {
pub fn new(typescript_type: String, is_optional: bool) -> Self {
Self {
typescript_type,
is_optional
}
}
}
impl From<String> for TypescriptType {
fn from(typescript_type: String) -> TypescriptType {
TypescriptType {
typescript_type,
is_optional: false,
}
}
}
fn convert_generic(generic_type: &syn::GenericArgument) -> TypescriptType {
match generic_type {
syn::GenericArgument::Type(rust_type) => convert_primitive(rust_type),
_ => "unknown".to_string().into(),
}
}
pub fn convert_primitive(rust_primitive: &Type) -> TypescriptType {
match rust_primitive {
Type::Reference(path) => convert_primitive(&path.elem),
Type::Path(path) => {
let segment = path.path.segments.last().unwrap();
let tokens = &segment.ident;
let arguments = &segment.arguments;
let parsed_type = tokens.to_string();
match parsed_type.as_str() {
"u8" => "number".to_string().into(),
"u16" => "number".to_string().into(),
"i64" => "number".to_string().into(),
"u64" => "number".to_string().into(),
"u128" => "number".to_string().into(),
"i8" => "number".to_string().into(),
"i16" => "number".to_string().into(),
"i32" => "number".to_string().into(),
"u32" => "number".to_string().into(),
"i128" => "number".to_string().into(),
"isize" => "number".to_string().into(),
"usize" => "number".to_string().into(),
"f32" => "number".to_string().into(),
"f64" => "number".to_string().into(),
"bool" => "boolean".to_string().into(),
"char" => "string".to_string().into(),
"str" => "string".to_string().into(),
"String" => "string".to_string().into(),
"NaiveDateTime" => "Date".to_string().into(),
"DateTime" => "Date".to_string().into(),
"Path" => TypescriptType {
is_optional: false,
typescript_type: match arguments {
syn::PathArguments::Parenthesized(parenthesized_argument) => {
format!("{:?}", parenthesized_argument)
}
syn::PathArguments::AngleBracketed(anglebracketed_argument) => {
convert_generic(anglebracketed_argument.args.first().unwrap()).typescript_type
}
_ => "unknown".to_string(),
},
},
"Json" => TypescriptType {
is_optional: false,
typescript_type: match arguments {
syn::PathArguments::Parenthesized(parenthesized_argument) => {
format!("{:?}", parenthesized_argument)
}
syn::PathArguments::AngleBracketed(anglebracketed_argument) => {
convert_generic(anglebracketed_argument.args.first().unwrap()).typescript_type
}
_ => "unknown".to_string(),
},
},
"Option" => TypescriptType {
is_optional: true,
typescript_type: match arguments {
syn::PathArguments::Parenthesized(parenthesized_argument) => {
format!("{:?}", parenthesized_argument)
}
syn::PathArguments::AngleBracketed(anglebracketed_argument) => {
convert_generic(anglebracketed_argument.args.first().unwrap()).typescript_type
}
_ => "unknown".to_string(),
},
},
"Vec" => match arguments {
syn::PathArguments::Parenthesized(parenthesized_argument) => {
format!("{:?}", parenthesized_argument)
}
syn::PathArguments::AngleBracketed(anglebracketed_argument) => format!(
"Array<{}>",
match convert_generic(anglebracketed_argument.args.first().unwrap()) {
TypescriptType {
is_optional: true,
typescript_type,
} => format!("{} | undefined", typescript_type),
TypescriptType {
is_optional: false,
typescript_type,
} => typescript_type,
}
),
_ => "unknown".to_string(),
}
.into(),
"HashMap" => match arguments {
syn::PathArguments::Parenthesized(parenthesized_argument) => {
format!("{:?}", parenthesized_argument)
}
syn::PathArguments::AngleBracketed(anglebracketed_argument) => format!(
"Record<{}>",
anglebracketed_argument
.args
.iter()
.map(|arg| match convert_generic(arg) {
TypescriptType {
is_optional: true,
typescript_type,
} => format!("{} | undefined", typescript_type),
TypescriptType {
is_optional: false,
typescript_type,
} => typescript_type,
})
.collect::<Vec<String>>()
.join(", ")
),
_ => "any".to_string(),
}
.into(),
_ => parsed_type.to_string().into(),
}
}
_ => "any".to_string().into(),
}
}