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| 1 | +package faker |
| 2 | + |
| 3 | +import ( |
| 4 | + "github.com/dop251/goja" |
| 5 | + "strconv" |
| 6 | +) |
| 7 | + |
| 8 | +type TrackObject[T any] interface { |
| 9 | + convert(v goja.Value) T |
| 10 | +} |
| 11 | + |
| 12 | +type JsArrayAccessor[T any] interface { |
| 13 | + Len() int |
| 14 | + Get(i int) T |
| 15 | + Set(i int, item T) |
| 16 | + Splice(start int, deleteCount int, items []T) |
| 17 | +} |
| 18 | + |
| 19 | +type TrackArray[T any] struct { |
| 20 | + array JsArrayAccessor[T] |
| 21 | + vm *goja.Runtime |
| 22 | + converter converter[T] |
| 23 | +} |
| 24 | + |
| 25 | +func newJsArray[T any](array JsArrayAccessor[T], vm *goja.Runtime, converter converter[T]) goja.Value { |
| 26 | + nodes := &TrackArray[T]{ |
| 27 | + array: array, |
| 28 | + converter: converter, |
| 29 | + vm: vm, |
| 30 | + } |
| 31 | + |
| 32 | + obj := vm.NewDynamicObject(nodes) |
| 33 | + |
| 34 | + arrayProto := vm.Get("Array").ToObject(vm).Get("prototype").ToObject(vm) |
| 35 | + err := obj.SetPrototype(arrayProto) |
| 36 | + if err != nil { |
| 37 | + panic(err) |
| 38 | + } |
| 39 | + |
| 40 | + return obj |
| 41 | +} |
| 42 | + |
| 43 | +func (a *TrackArray[T]) Get(key string) goja.Value { |
| 44 | + switch key { |
| 45 | + case "length": |
| 46 | + return a.vm.ToValue(a.array.Len()) |
| 47 | + case "push": |
| 48 | + return a.vm.ToValue(func(call goja.FunctionCall) goja.Value { |
| 49 | + arg1 := call.Argument(0) |
| 50 | + item := a.converter(arg1) |
| 51 | + a.array.Splice(a.array.Len(), 0, []T{item}) |
| 52 | + return goja.Undefined() |
| 53 | + }) |
| 54 | + case "pop": |
| 55 | + return a.vm.ToValue(func(call goja.FunctionCall) goja.Value { |
| 56 | + if a.array.Len() > 0 { |
| 57 | + a.array.Splice(a.array.Len()-1, 1, nil) |
| 58 | + } |
| 59 | + |
| 60 | + return goja.Undefined() |
| 61 | + }) |
| 62 | + case "shift": |
| 63 | + return a.vm.ToValue(func(call goja.FunctionCall) goja.Value { |
| 64 | + if a.array.Len() > 0 { |
| 65 | + a.array.Splice(0, 1, nil) |
| 66 | + } |
| 67 | + return goja.Undefined() |
| 68 | + }) |
| 69 | + case "unshift": |
| 70 | + return a.vm.ToValue(func(call goja.FunctionCall) goja.Value { |
| 71 | + values := call.Arguments[0:] |
| 72 | + items := make([]T, 0, len(values)) |
| 73 | + for _, v := range values { |
| 74 | + items = append(items, a.converter(v)) |
| 75 | + } |
| 76 | + a.array.Splice(0, 0, items) |
| 77 | + return goja.Undefined() |
| 78 | + }) |
| 79 | + case "splice": |
| 80 | + return a.vm.ToValue(func(call goja.FunctionCall) goja.Value { |
| 81 | + start := call.Argument(0).ToInteger() |
| 82 | + deleteCount := call.Argument(1).ToInteger() |
| 83 | + values := call.Arguments[2:] |
| 84 | + items := make([]T, 0, len(values)) |
| 85 | + for _, v := range values { |
| 86 | + items = append(items, a.converter(v)) |
| 87 | + } |
| 88 | + |
| 89 | + a.array.Splice(int(start), int(deleteCount), items) |
| 90 | + return goja.Undefined() |
| 91 | + }) |
| 92 | + } |
| 93 | + |
| 94 | + if i, err := strconv.Atoi(key); err == nil && i >= 0 && i < a.array.Len() { |
| 95 | + return a.vm.ToValue(a.array.Get(i)) |
| 96 | + } |
| 97 | + |
| 98 | + return nil |
| 99 | +} |
| 100 | + |
| 101 | +func (a *TrackArray[T]) Set(key string, val goja.Value) bool { |
| 102 | + if i, err := strconv.Atoi(key); err == nil && i >= 0 { |
| 103 | + a.array.Set(i, a.converter(val)) |
| 104 | + |
| 105 | + return true |
| 106 | + } |
| 107 | + return false |
| 108 | +} |
| 109 | + |
| 110 | +func (a *TrackArray[T]) Has(key string) bool { |
| 111 | + if key == "length" { |
| 112 | + return true |
| 113 | + } |
| 114 | + if i, err := strconv.Atoi(key); err == nil { |
| 115 | + return i >= 0 && i < a.array.Len() |
| 116 | + } |
| 117 | + return false |
| 118 | +} |
| 119 | + |
| 120 | +func (a *TrackArray[T]) Delete(key string) bool { |
| 121 | + if i, err := strconv.Atoi(key); err == nil && i >= 0 && i < a.array.Len() { |
| 122 | + var zero T |
| 123 | + a.array.Set(i, zero) |
| 124 | + return true |
| 125 | + } |
| 126 | + return false |
| 127 | +} |
| 128 | + |
| 129 | +func (a *TrackArray[T]) Keys() []string { |
| 130 | + keys := make([]string, a.array.Len()) |
| 131 | + for i := 0; i < a.array.Len(); i++ { |
| 132 | + keys[i] = strconv.Itoa(i) |
| 133 | + } |
| 134 | + keys = append(keys, "length") |
| 135 | + return keys |
| 136 | +} |
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