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v/vlib/x/json2/json2.v
2020-11-25 13:09:40 +02:00

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2.9 KiB
V

// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module json2
pub interface Serializable {
from_json(f Any)
to_json() string
}
// Decodes a JSON string into an `Any` type. Returns an option.
pub fn raw_decode(src string) ?Any {
mut p := new_parser(src, true)
return p.decode()
}
// Same with `raw_decode`, but skips the type conversion for certain types when decoding a certain value.
pub fn fast_raw_decode(src string) ?Any {
mut p := new_parser(src, false)
return p.decode()
}
// A generic function that decodes a JSON string into the target type.
//
// TODO: decode must return an optional generics
pub fn decode<T>(src string) T {
res := raw_decode(src) or {
panic(err)
}
mut typ := T{}
typ.from_json(res)
return typ
}
// TODO: decode must return an optional generics
// pub fn decode2<T>(src string) ?T {
// res := raw_decode(src)?
// match typeof(T) {
// 'string' {
// return res.str()
// }
// 'int' {
// return res.int()
// }
// 'f64' {
// return res.f64()
// }
// else {
// mut typ := T{}
// typ.from_json(res)
// return typ
// }
// }
// }
// A generic function that encodes a type into a JSON string.
pub fn encode<T>(typ T) string {
// if typeof(typ) in ['string', 'int', 'f64'] {
// return Any(typ).str()
// }
return typ.to_json()
}
// A simple function that returns `Null` struct. For use on constructing an `Any` object.
pub fn null() Null {
return Null{}
}
// Use `Any` as a map.
pub fn (f Any) as_map() map[string]Any {
if f is map[string]Any {
return f
} else if f is []Any {
mut mp := map[string]Any
for i, fi in f {
mp['$i'] = fi
}
return mp
}
return { '0': f }
}
// Use `Any` as an integer.
pub fn (f Any) int() int {
match f {
int { return f }
i64 { return int(f) }
f64 { return f.str().int() }
f32 { return f.str().int() }
bool { return int(f) }
else { return 0 }
}
}
// Use `Any` as a 64-bit integer.
pub fn (f Any) i64() i64 {
match f {
int { return f }
i64 { return int(f) }
f64 { return f.str().i64() }
f32 { return f.str().i64() }
bool { return int(f) }
else { return 0 }
}
}
// Use `Any` as a 32-bit float.
pub fn (f Any) f32() f32 {
match f {
int { return f }
i64 { return f.str().f32() }
f64 { return f.str().f32() }
f32 { return f }
else { return 0.0 }
}
}
// Use `Any` as a float.
pub fn (f Any) f64() f64 {
match f {
int { return f }
i64 { return f }
f64 { return f }
f32 { return f.str().f64() }
else { return 0.0 }
}
}
// Use `Any` as an array.
pub fn (f Any) arr() []Any {
if f is []Any {
return f
} else if f is map[string]Any {
mut arr := []Any{}
for _, v in f {
arr << v
}
return arr
}
return [f]
}
// Use `Any` as a bool
pub fn (f Any) bool() bool {
match f {
bool { return f }
string { return f.bool() }
else { return false }
}
}