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use super::Interpreter;
use crate::{
config::cfg::EnumRepresentation,
error::E,
interpreter::Offset,
nature::{Composite, Nature, Natures, Referred},
};
use std::{
fs::File,
io::{BufWriter, Write},
ops::Deref,
};
impl Interpreter for Referred {
fn declaration(
&self,
natures: &Natures,
buf: &mut BufWriter<File>,
offset: Offset,
) -> Result<(), E> {
match self {
Referred::Enum(name, _context, variants, repres) => {
let flat = Referred::is_flat_varians(variants)?;
if flat {
buf.write_all(format!("{offset}export enum {name} {{\n",).as_bytes())?;
for variant in variants.iter() {
variant.declaration(natures, buf, offset.inc())?;
buf.write_all(",\n".as_bytes())?;
}
buf.write_all(format!("{offset}}}\n",).as_bytes())?;
} else {
match repres {
EnumRepresentation::Flat => {
buf.write_all(
format!("{offset}export interface {name} {{\n",).as_bytes(),
)?;
for variant in variants.iter() {
variant.declaration(natures, buf, offset.inc())?;
buf.write_all(";\n".as_bytes())?;
}
buf.write_all(format!("{offset}}}\n",).as_bytes())?;
}
EnumRepresentation::Union | EnumRepresentation::DiscriminatedUnion => {
buf.write_all(format!("{offset}export type {name} =\n",).as_bytes())?;
for (n, variant) in variants.iter().enumerate() {
variant.declaration(natures, buf, offset.inc())?;
buf.write_all(
if n == variants.len() - 1 { "" } else { " |\n" }.as_bytes(),
)?;
}
buf.write_all(format!("{offset};\n",).as_bytes())?;
}
}
}
}
Referred::EnumVariant(name, _context, fields, flat, repres) => {
let named = fields
.iter()
.any(|f| matches!(f, Nature::Referred(Referred::Field(..))));
if fields.is_empty() {
if *flat {
buf.write_all(format!("{offset}{name}").as_bytes())?;
} else {
match repres {
EnumRepresentation::Flat => {
buf.write_all(format!("{offset}{name}?: null").as_bytes())?;
}
EnumRepresentation::Union => {
buf.write_all(format!("{offset}{{ {name}: null }}").as_bytes())?;
}
EnumRepresentation::DiscriminatedUnion => {
buf.write_all(format!("{offset}\"{name}\"").as_bytes())?;
}
}
}
} else if fields.len() == 1 {
match repres {
EnumRepresentation::Flat => {
buf.write_all(format!("{offset}{name}?: ").as_bytes())?;
}
EnumRepresentation::Union | EnumRepresentation::DiscriminatedUnion => {
buf.write_all(
format!(
"{offset}{{{}{name}: ",
if named {
format!("\n{}", offset.inc())
} else {
" ".to_owned()
}
)
.as_bytes(),
)?;
}
}
if named {
buf.write_all("{\n".as_bytes())?;
}
fields
.first()
.ok_or(E::Parsing(String::from(
"Expecting single field for Variant",
)))?
.reference(
natures,
buf,
match repres {
EnumRepresentation::Flat => offset.inc(),
EnumRepresentation::Union
| EnumRepresentation::DiscriminatedUnion => offset.inc().inc(),
},
)?;
if named {
buf.write_all(
format!(
"\n{}}}",
match repres {
EnumRepresentation::Flat => offset.clone(),
EnumRepresentation::Union
| EnumRepresentation::DiscriminatedUnion => {
offset.inc()
}
}
)
.as_bytes(),
)?;
}
match repres {
EnumRepresentation::Flat => {}
EnumRepresentation::Union | EnumRepresentation::DiscriminatedUnion => {
buf.write_all(
if named {
format!("\n{offset}}}",)
} else {
" }".to_owned()
}
.as_bytes(),
)?;
}
}
} else {
match repres {
EnumRepresentation::Flat => {
buf.write_all(
format!("{offset}{name}?: {}", if named { "{\n" } else { "[" })
.as_bytes(),
)?;
}
EnumRepresentation::Union | EnumRepresentation::DiscriminatedUnion => {
buf.write_all(
format!(
"{offset}{{{}{name}: {}",
if named {
format!("\n{}", offset.inc())
} else {
" ".to_owned()
},
if named { "{\n" } else { "[" }
)
.as_bytes(),
)?;
}
}
for (i, field) in fields.iter().enumerate() {
field.reference(
natures,
buf,
match repres {
EnumRepresentation::Flat => offset.inc(),
EnumRepresentation::Union
| EnumRepresentation::DiscriminatedUnion => offset.inc().inc(),
},
)?;
if i < fields.len() - 1 {
buf.write_all(if named { ";\n" } else { "," }.as_bytes())?;
}
}
buf.write_all(
if named {
format!(
"\n{}}}",
match repres {
EnumRepresentation::Flat => offset.clone(),
EnumRepresentation::Union
| EnumRepresentation::DiscriminatedUnion => {
offset.inc()
}
}
)
} else {
"]".to_owned()
}
.as_bytes(),
)?;
match repres {
EnumRepresentation::Flat => {}
EnumRepresentation::Union | EnumRepresentation::DiscriminatedUnion => {
buf.write_all(
if named {
format!("\n{offset}}}",)
} else {
" }".to_owned()
}
.as_bytes(),
)?;
}
}
}
}
Referred::Field(name, context, ..) => {
buf.write_all(format!("{}: ", context.rename_field(name)?).as_bytes())?
}
Referred::Func(name, context, func) => {
if let Nature::Composite(Composite::Func(_, args, out, asyncness, constructor)) =
func.deref()
{
if *constructor {
return Ok(());
}
let renamed = context.rename_method(name)?;
buf.write_all(
format!("{offset}export declare function {renamed}(",).as_bytes(),
)?;
for (i, ty) in args.iter().enumerate() {
ty.declaration(natures, buf, Offset::new())?;
if i < args.len() - 1 {
buf.write_all(", ".as_bytes())?;
}
}
buf.write_all("): ".as_bytes())?;
if *asyncness {
buf.write_all("Promise<".as_bytes())?;
}
if let Some(out) = out {
out.reference(natures, buf, offset.clone())?;
} else {
buf.write_all("void".as_bytes())?;
}
if *asyncness {
buf.write_all(">".as_bytes())?;
}
buf.write_all(";\n".as_bytes())?;
} else {
return Err(E::Parsing(format!("Cannot find body of function {name}")));
}
}
Referred::FuncArg(name, _context, nature, binding) => {
buf.write_all(format!("{name}: ").as_bytes())?;
if let Some(ref_name) = binding {
buf.write_all(ref_name.as_bytes())?;
} else {
nature.reference(natures, buf, offset.clone())?;
}
}
Referred::Struct(name, context, fields) => {
buf.write_all(
format!(
"{offset}{} {name} {{\n",
if context.as_class() {
"export declare class"
} else {
"export interface"
},
)
.as_bytes(),
)?;
for field in fields {
if field.is_field_ignored() {
continue;
}
field.reference(natures, buf, offset.inc())?;
buf.write_all(";\n".as_bytes())?;
}
buf.write_all(format!("{offset}}}\n",).as_bytes())?;
}
Referred::TupleStruct(name, _context, field) => {
buf.write_all(format!("{offset}export type {name} = ").as_bytes())?;
if let Some(field) = field {
field.reference(natures, buf, Offset::new())?;
} else {
buf.write_all("undefined".as_bytes())?;
}
buf.write_all(";\n".as_bytes())?;
}
Referred::Constant(name, _context, _ty, value) => {
buf.write_all(format!("{offset}export const {name} = {value};\n").as_bytes())?;
}
Referred::Ref(ref_name, ..) => {
return Err(E::Parsing(format!("Reference {ref_name} can be declared")));
}
Referred::Generic(alias, ..) => {
return Err(E::Parsing(format!(
"Generic type cannot be rendered out of context; type alias = {alias}"
)))
}
}
Ok(())
}
fn reference(
&self,
natures: &Natures,
buf: &mut BufWriter<File>,
offset: Offset,
) -> Result<(), E> {
match self {
Referred::Enum(name, ..) => buf.write_all(name.as_bytes())?,
Referred::EnumVariant(name, ..) => {
buf.write_all(format!("{offset}{name}: ").as_bytes())?
}
Referred::Field(name, context, nature, ..) => {
if let Nature::Composite(Composite::Func(_, _, _, _, constructor)) = nature.deref()
{
if *constructor {
buf.write_all(format!("{offset}constructor").as_bytes())?;
} else {
buf.write_all(
format!("{offset}{}", context.rename_method(name)?).as_bytes(),
)?;
}
nature.reference(natures, buf, offset)?;
} else {
buf.write_all(format!("{offset}{}: ", context.rename_field(name)?).as_bytes())?;
if let Nature::Referred(Referred::Ref(ref_name, _)) = nature.deref() {
if let Some(generic) = context.get_generic(ref_name) {
generic.reference(natures, buf, offset)?;
return Ok(());
}
}
nature.reference(natures, buf, offset)?;
}
}
Referred::Func(name, ..) => buf.write_all(name.as_bytes())?,
Referred::FuncArg(name, ..) => {
return Err(E::Parsing(format!(
"Function argument {name} can be refered"
)));
}
Referred::Struct(name, ..) => buf.write_all(name.as_bytes())?,
Referred::TupleStruct(name, ..) => buf.write_all(name.as_bytes())?,
Referred::Ref(ref_name, context) => {
if let Some(context) = context {
if let Some(nature) = context.get_generic(ref_name) {
nature.reference(natures, buf, offset)?;
return Ok(());
}
}
buf.write_all(ref_name.as_bytes())?;
}
Referred::Constant(name, ..) => {
return Err(E::Parsing(format!("Constant {name} can be refered")));
}
Referred::Generic(alias, _) => {
return Err(E::Parsing(format!(
"Generic type cannot be rendered out of context; type alias = {alias}"
)))
}
}
Ok(())
}
}