/
Decoder.mo
168 lines (132 loc) · 4.45 KB
/
Decoder.mo
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import Array "mo:base/Array";
import Debug "mo:base/Debug";
import Result "mo:base/Result";
import Prelude "mo:base/Prelude";
import Encoder "mo:motoko_candid/Encoder";
import Decoder "mo:motoko_candid/Decoder";
import Arg "mo:motoko_candid/Arg";
import Value "mo:motoko_candid/Value";
import Type "mo:motoko_candid/Type";
import T "Types";
module {
type Arg = Arg.Arg;
type Type = Type.Type;
type Value = Value.Value;
type RecordFieldType = Type.RecordFieldType;
type RecordFieldValue = Value.RecordFieldValue;
type Candid = T.Candid;
type KeyValuePair = T.KeyValuePair;
public func decode(candid : Candid) : Blob {
let args = toArgs(candid);
Encoder.encode(args);
};
func toArgs(candid : Candid) : [Arg] {
let arg : Arg = {
_type = toArgType(candid);
value = toArgValue(candid);
};
[arg];
};
func toArgType(candid : Candid) : Type {
switch (candid) {
case (#Nat(_)) #nat;
case (#Nat8(_)) #nat8;
case (#Nat16(_)) #nat16;
case (#Nat32(_)) #nat32;
case (#Nat64(_)) #nat64;
case (#Int(_)) #int;
case (#Int8(_)) #int8;
case (#Int16(_)) #int16;
case (#Int32(_)) #int32;
case (#Int64(_)) #int64;
case (#Float(_)) #float64;
case (#Bool(_)) #bool;
case (#Principal(_)) #principal;
case (#Text(_)) #text;
case (#Null) #_null;
case (#Option(optType)) {
#opt(toArgType(optType));
};
case (#Array(arr)) {
#vector(toArgType(arr[0]));
};
case (#Record(records)) {
let newRecords = Array.map(
records,
func((key, val) : KeyValuePair) : RecordFieldType {
{
tag = #name(key);
_type = toArgType(val);
};
},
);
#record(newRecords);
};
// case (#Variant(variants)) {
// let newVariants = Array.map(
// variants,
// func((key, val) : KeyValuePair) : RecordFieldType {
// {
// tag = #name(key);
// _type = toArgType(val);
// };
// },
// );
// #Variant(newVariants);
// };
case (_) { Prelude.unreachable() };
};
};
func toArgValue(candid : Candid) : Value {
switch (candid) {
case (#Nat(n)) #nat(n);
case (#Nat8(n)) #nat8(n);
case (#Nat16(n)) #nat16(n);
case (#Nat32(n)) #nat32(n);
case (#Nat64(n)) #nat64(n);
case (#Int(n)) #int(n);
case (#Int8(n)) #int8(n);
case (#Int16(n)) #int16(n);
case (#Int32(n)) #int32(n);
case (#Int64(n)) #int64(n);
case (#Float(n)) #float64(n);
case (#Bool(b)) #bool(b);
case (#Principal(n)) #principal(#transparent(n));
case (#Text(n)) #text(n);
case (#Null) #_null;
case (#Option(optVal)) {
#opt(?toArgValue(optVal));
};
case (#Array(arr)) {
let transformedArr = Array.map(
arr,
func(elem : Candid) : Value {
toArgValue(elem);
},
);
#vector(transformedArr);
};
case (#Record(records)) {
let newRecords = Array.map(
records,
func((key, val) : KeyValuePair) : RecordFieldValue {
{
tag = #name(key);
value = toArgValue(val);
};
},
);
#record(newRecords);
};
// case (#Variant(variants)) {
// let (key, val) = variants[0];
// let res = {
// tag = #name(key);
// value = toArgValue(val);
// };
// #Variant(res);
// };
case (_) { Prelude.unreachable() };
};
};
};