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use super::javascript::{ident, is_tuple};
use crate::parser::typing::TypeEnv;
use crate::pretty::*;
use crate::types::{Field, Function, Label, Type};
use pretty::RcDoc;
fn pp_ty<'a>(env: &'a TypeEnv, ty: &'a Type, is_ref: bool) -> RcDoc<'a> {
use Type::*;
match *ty {
Null => str("null"),
Bool => str("boolean"),
Nat => str("bigint"),
Int => str("bigint"),
Nat8 => str("number"),
Nat16 => str("number"),
Nat32 => str("number"),
Nat64 => str("bigint"),
Int8 => str("number"),
Int16 => str("number"),
Int32 => str("number"),
Int64 => str("bigint"),
Float32 => str("number"),
Float64 => str("number"),
Text => str("string"),
Reserved => str("any"),
Empty => str("never"),
Var(ref id) => {
if is_ref {
let ty = env.rec_find_type(id).unwrap();
if matches!(ty, Service(_) | Func(_)) {
pp_ty(env, ty, false)
} else {
ident(id)
}
} else {
ident(id)
}
}
Principal => str("Principal"),
Opt(ref t) => str("[] | ").append(enclose("[", pp_ty(env, t, is_ref), "]")),
Vec(ref t) => str("Array").append(enclose("<", pp_ty(env, t, is_ref), ">")),
Record(ref fs) => {
if is_tuple(ty) {
let tuple = concat(fs.iter().map(|f| pp_ty(env, &f.ty, is_ref)), ",");
enclose("[", tuple, "]")
} else {
let fields = concat(fs.iter().map(|f| pp_field(env, f, is_ref)), ",");
enclose_space("{", fields, "}")
}
}
Variant(ref fs) => strict_concat(
fs.iter()
.map(|f| enclose_space("{", pp_field(env, f, is_ref), "}")),
" |",
)
.nest(INDENT_SPACE),
Func(_) => str("[Principal, string]"),
Service(_) => str("Principal"),
Class(_, _) => unreachable!(),
Knot(_) | Unknown => unreachable!(),
}
}
fn pp_label(id: &Label) -> RcDoc {
match id {
Label::Named(str) => quote_ident(str),
Label::Id(n) | Label::Unnamed(n) => str("_")
.append(RcDoc::as_string(n))
.append("_")
.append(RcDoc::space()),
}
}
fn pp_field<'a>(env: &'a TypeEnv, field: &'a Field, is_ref: bool) -> RcDoc<'a> {
pp_label(&field.id)
.append(kwd(":"))
.append(pp_ty(env, &field.ty, is_ref))
}
fn pp_function<'a>(env: &'a TypeEnv, func: &'a Function) -> RcDoc<'a> {
let args = func
.args
.iter()
.enumerate()
.map(|(i, ty)| RcDoc::text(format!("arg_{}: ", i)).append(pp_ty(env, ty, true)));
let args = enclose("(", concat(args, ","), ")");
let rets = str("Promise").append(enclose(
"<",
match func.rets.len() {
0 => str("undefined"),
1 => pp_ty(env, &func.rets[0], true),
_ => enclose(
"[",
concat(func.rets.iter().map(|ty| pp_ty(env, ty, true)), ","),
"]",
),
},
">",
));
args.append(" => ").append(rets).nest(INDENT_SPACE)
}
fn pp_service<'a>(env: &'a TypeEnv, serv: &'a [(String, Type)]) -> RcDoc<'a> {
let doc = concat(
serv.iter().map(|(id, func)| {
let func = match func {
Type::Func(ref func) => pp_function(env, func),
_ => pp_ty(env, func, false),
};
quote_ident(id).append(kwd(":")).append(func)
}),
",",
);
enclose_space("{", doc, "}")
}
fn pp_defs<'a>(env: &'a TypeEnv, def_list: &'a [&'a str]) -> RcDoc<'a> {
lines(def_list.iter().map(|id| {
let ty = env.find_type(id).unwrap();
let export = match ty {
Type::Record(_) if !ty.is_tuple() => kwd("export interface")
.append(ident(id))
.append(" ")
.append(pp_ty(env, ty, false)),
Type::Service(ref serv) => kwd("export interface")
.append(ident(id))
.append(" ")
.append(pp_service(env, serv)),
Type::Func(ref func) => kwd("export type")
.append(ident(id))
.append(" = ")
.append(pp_function(env, func))
.append(";"),
_ => kwd("export type")
.append(ident(id))
.append(" = ")
.append(pp_ty(env, ty, false))
.append(";"),
};
export
}))
}
fn pp_actor<'a>(env: &'a TypeEnv, ty: &'a Type) -> RcDoc<'a> {
match ty {
Type::Service(ref serv) => kwd("export interface _SERVICE").append(pp_service(env, serv)),
Type::Var(id) => kwd("export interface _SERVICE extends")
.append(str(id))
.append(str(" {}")),
Type::Class(_, t) => pp_actor(env, t),
_ => unreachable!(),
}
}
pub fn compile(env: &TypeEnv, actor: &Option<Type>) -> String {
let header = r#"import type { Principal } from '@dfinity/principal';"#;
let def_list: Vec<_> = env.0.iter().map(|pair| pair.0.as_ref()).collect();
let defs = pp_defs(env, &def_list);
let actor = match actor {
None => RcDoc::nil(),
Some(actor) => pp_actor(env, actor),
};
let doc = RcDoc::text(header)
.append(RcDoc::line())
.append(defs)
.append(actor);
doc.pretty(LINE_WIDTH).to_string()
}
