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type 'a t = {
name : string;
schema : Schema.t;
encode : 'a -> string;
decode : string -> ('a, Error.t) result;
}
let decode_error ~name value =
Error
(Error.make ~location:Error.Route ~expected:name ~got:value
("expected " ^ name))
let string =
{
name = "string";
schema = Schema.string;
encode = Fun.id;
decode = (fun value -> Ok value);
}
let int =
{
name = "integer";
schema = Schema.integer;
encode = string_of_int;
decode =
(fun value ->
match int_of_string_opt value with
| Some value -> Ok value
| None -> decode_error ~name:"integer" value);
}
let bool =
{
name = "boolean";
schema = Schema.boolean;
encode = string_of_bool;
decode =
(function
| "true" -> Ok true
| "false" -> Ok false
| value -> decode_error ~name:"boolean" value);
}
let float =
{
name = "number";
schema = Schema.number;
encode = string_of_float;
decode =
(fun value ->
match float_of_string_opt value with
| Some value -> Ok value
| None -> decode_error ~name:"number" value);
}