import x.json2 enum JobTitle { manager executive worker } struct Employee { pub mut: name string age int salary f32 title JobTitle } fn (e Employee) to_json() string { mut mp := map[string]json2.Any{} mp['name'] = json2.Any(e.name) mp['age'] = json2.Any(e.age) mp['salary'] = json2.Any(e.salary) mp['title'] = json2.Any(int(e.title)) /* $for field in Employee.fields { d := e.$(field.name) $if field.typ is JobTitle { mp[field.name] = json.encode(d) } $else { mp[field.name] = d } } */ return mp.str() } fn (mut e Employee) from_json(any json2.Any) { mp := any.as_map() e.name = mp['name'] or { json2.Any('') }.str() e.age = mp['age'] or { json2.Any(0) }.int() e.salary = mp['salary'] or { json2.Any(0) }.f32() e.title = unsafe { JobTitle(mp['title'] or { json2.Any(0) }.int()) } } fn test_simple() { x := Employee{'Peter', 28, 95000.5, .worker} s := json2.encode(x) eprintln('Employee x: $s') assert s == '{"name":"Peter","age":28,"salary":95000.5,"title":2}' y := json2.decode(s) or { println(err) assert false return } eprintln('Employee y: $y') assert y.name == 'Peter' assert y.age == 28 assert y.salary == 95000.5 assert y.title == .worker } fn test_fast_raw_decode() { s := '{"name":"Peter","age":28,"salary":95000.5,"title":2}' o := json2.fast_raw_decode(s) or { assert false json2.Any(json2.null) } str := o.str() assert str == '{"name":"Peter","age":"28","salary":"95000.5","title":"2"}' } fn test_character_unescape() { message := r'{ "newline": "new\nline", "tab": "\ttab", "backslash": "back\\slash", "quotes": "\"quotes\"", "slash":"\/dev\/null" }' mut obj := json2.raw_decode(message) or { println(err) assert false return } lines := obj.as_map() eprintln('$lines') assert lines['newline'] or { 0 }.str() == 'new\nline' assert lines['tab'] or { 0 }.str() == '\ttab' assert lines['backslash'] or { 0 }.str() == 'back\\slash' assert lines['quotes'] or { 0 }.str() == '"quotes"' assert lines['slash'] or { 0 }.str() == '/dev/null' } struct User2 { pub mut: age int nums []int } fn (mut u User2) from_json(an json2.Any) { mp := an.as_map() mut js_field_name := '' $for field in User.fields { js_field_name = field.name for attr in field.attrs { if attr.starts_with('json:') { js_field_name = attr.all_after('json:').trim_left(' ') break } } match field.name { 'age' { u.age = mp[js_field_name] or { 0 }.int() } 'nums' { u.nums = mp[js_field_name] or { 0 }.arr().map(it.int()) } else {} } } } // User struct needs to be `pub mut` for now in order to access and manipulate values struct User { pub mut: age int nums []int last_name string [json: lastName] is_registered bool [json: IsRegistered] typ int [json: 'type'] pets string [json: 'pet_animals'; raw] } fn (mut u User) from_json(an json2.Any) { mp := an.as_map() mut js_field_name := '' $for field in User.fields { // FIXME: C error when initializing js_field_name inside comptime for js_field_name = field.name for attr in field.attrs { if attr.starts_with('json:') { js_field_name = attr.all_after('json:').trim_left(' ') break } } match field.name { 'age' { u.age = mp[js_field_name] or { 0 }.int() } 'nums' { u.nums = mp[js_field_name] or { 0 }.arr().map(it.int()) } 'last_name' { u.last_name = mp[js_field_name] or { 0 }.str() } 'is_registered' { u.is_registered = mp[js_field_name] or { 0 }.bool() } 'typ' { u.typ = mp[js_field_name] or { 0 }.int() } 'pets' { u.pets = mp[js_field_name] or { 0 }.str() } else {} } } } fn (u User) to_json() string { // TODO: derive from field mut mp := { 'age': json2.Any(u.age) } mp['nums'] = u.nums.map(json2.Any(it)) mp['lastName'] = json2.Any(u.last_name) mp['IsRegistered'] = json2.Any(u.is_registered) mp['type'] = json2.Any(u.typ) mp['pet_animals'] = json2.Any(u.pets) return mp.str() } fn test_parse_user() { s := '{"age": 10, "nums": [1,2,3], "type": 1, "lastName": "Johnson", "IsRegistered": true, "pet_animals": {"name": "Bob", "animal": "Dog"}}' u2 := json2.decode(s) or { println(err) assert false return } println(u2) u := json2.decode(s) or { println(err) assert false return } assert u.age == 10 assert u.last_name == 'Johnson' assert u.is_registered == true assert u.nums.len == 3 assert u.nums[0] == 1 assert u.nums[1] == 2 assert u.nums[2] == 3 assert u.typ == 1 assert u.pets == '{"name":"Bob","animal":"Dog"}' } fn test_encode_user() { usr := User{ age: 10 nums: [1, 2, 3] last_name: 'Johnson' is_registered: true typ: 0 pets: 'foo' } expected := '{"age":10,"nums":[1,2,3],"lastName":"Johnson","IsRegistered":true,"type":0,"pet_animals":"foo"}' out := json2.encode(usr) assert out == expected } struct Color { pub mut: space string point string [raw] } fn (mut c Color) from_json(an json2.Any) { mp := an.as_map() $for field in Color.fields { match field.name { 'space' { c.space = mp[field.name] or { 0 }.str() } 'point' { c.point = mp[field.name] or { 0 }.str() } else {} } } } fn test_raw_json_field() { color := json2.decode('{"space": "YCbCr", "point": {"Y": 123}}') or { assert false Color{} } assert color.point == '{"Y":123}' assert color.space == 'YCbCr' } /* struct City { name string } struct Country { cities []City name string } fn test_struct_in_struct() { country := json.decode(Country, '{ "name": "UK", "cities": [{"name":"London"}, {"name":"Manchester"}]}') or { assert false exit(1) } assert country.name == 'UK' assert country.cities.len == 2 assert country.cities[0].name == 'London' assert country.cities[1].name == 'Manchester' println(country.cities) } */ fn test_encode_map() { expected := '{"one":1,"two":2,"three":3,"four":4}' numbers := { 'one': json2.Any(1) 'two': json2.Any(2) 'three': json2.Any(3) 'four': json2.Any(4) } out := numbers.str() assert out == expected } /* fn test_parse_map() { expected := { 'one': 1 'two': 2 'three': 3 'four': 4 } out := json.decode('{"one":1,"two":2,"three":3,"four":4}') or { assert false r := { '': 0 } r } println(out) assert out == expected } struct Data { countries []Country users map[string]User extra map[string]map[string]int } fn test_nested_type() { data_expected := '{"countries":[{"cities":[{"name":"London"},{"name":"Manchester"}],"name":"UK"},{"cities":[{"name":"Donlon"},{"name":"Termanches"}],"name":"KU"}],"users":{"Foo":{"age":10,"nums":[1,2,3],"lastName":"Johnson","IsRegistered":true,"type":0,"pet_animals":"little foo"},"Boo":{"age":20,"nums":[5,3,1],"lastName":"Smith","IsRegistered":false,"type":4,"pet_animals":"little boo"}},"extra":{"2":{"n1":2,"n2":4,"n3":8,"n4":16},"3":{"n1":3,"n2":9,"n3":27,"n4":81}}}' data := Data{ countries: [ Country{ name: 'UK' cities: [City{'London'}, City{'Manchester'}, ] }, Country{ name: 'KU' cities: [City{'Donlon'}, City{'Termanches'}, ] }, ] users: { 'Foo': User{ age: 10 nums: [1, 2, 3] last_name: 'Johnson' is_registered: true typ: 0 pets: 'little foo' }, 'Boo': User{ age: 20 nums: [5, 3, 1] last_name: 'Smith' is_registered: false typ: 4 pets: 'little boo' } }, extra: { '2': { 'n1': 2 'n2': 4 'n3': 8 'n4': 16 }, '3': { 'n1': 3 'n2': 9 'n3': 27 'n4': 81 }, } } out := json.encode(data) println(out) assert out == data_expected data2 := json.decode(Data, data_expected) or { assert false Data{} } assert data2.countries.len == data.countries.len for i in 0..1 { assert data2.countries[i].name == data.countries[i].name assert data2.countries[i].cities.len == data.countries[i].cities.len for j in 0..1 { assert data2.countries[i].cities[j].name == data.countries[i].cities[j].name } } for key, user in data.users { assert data2.users[key].age == user.age assert data2.users[key].nums == user.nums assert data2.users[key].last_name == user.last_name assert data2.users[key].is_registered == user.is_registered assert data2.users[key].typ == user.typ // assert data2.users[key].pets == user.pets // TODO FIX } for k, v in data.extra { for k2, v2 in v { assert data2.extra[k][k2] == v2 } } } fn test_errors() { invalid_array := fn () { data := '{"countries":[{"cities":[{"name":"London"},{"name":"Manchester"}],"name":"UK"},{"cities":{"name":"Donlon"},"name":"KU"}],"users":{"Foo":{"age":10,"nums":[1,2,3],"lastName":"Johnson","IsRegistered":true,"type":0,"pet_animals":"little foo"},"Boo":{"age":20,"nums":[5,3,1],"lastName":"Smith","IsRegistered":false,"type":4,"pet_animals":"little boo"}},"extra":{"2":{"n1":2,"n2":4,"n3":8,"n4":16},"3":{"n1":3,"n2":9,"n3":27,"n4":81}}}' json.decode(Data, data) or { println(err) assert err.starts_with('Json element is not an array:') return } assert false } invalid_object := fn() { data := '{"countries":[{"cities":[{"name":"London"},{"name":"Manchester"}],"name":"UK"},{"cities":[{"name":"Donlon"},{"name":"Termanches"}],"name":"KU"}],"users":[{"age":10,"nums":[1,2,3],"lastName":"Johnson","IsRegistered":true,"type":0,"pet_animals":"little foo"},{"age":20,"nums":[5,3,1],"lastName":"Smith","IsRegistered":false,"type":4,"pet_animals":"little boo"}],"extra":{"2":{"n1":2,"n2":4,"n3":8,"n4":16},"3":{"n1":3,"n2":9,"n3":27,"n4":81}}}' json.decode(Data, data) or { println(err) assert err.starts_with('Json element is not an object:') return } assert false } invalid_array() invalid_object() } */