|
| 1 | +package pb |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "reflect" |
| 6 | + |
| 7 | + types "github.com/gogo/protobuf/types" |
| 8 | +) |
| 9 | + |
| 10 | +// ToStruct converts a map[string]interface{} to a types.Struct |
| 11 | +func ToStruct(v map[string]interface{}) *types.Struct { |
| 12 | + size := len(v) |
| 13 | + if size == 0 { |
| 14 | + return nil |
| 15 | + } |
| 16 | + |
| 17 | + fields := make(map[string]*types.Value, size) |
| 18 | + for k, v := range v { |
| 19 | + fields[k] = ToValue(v) |
| 20 | + } |
| 21 | + |
| 22 | + return &types.Struct{ |
| 23 | + Fields: fields, |
| 24 | + } |
| 25 | +} |
| 26 | + |
| 27 | +func newBoolValue(v bool) *types.Value { |
| 28 | + return &types.Value{ |
| 29 | + Kind: &types.Value_BoolValue{ |
| 30 | + BoolValue: v, |
| 31 | + }, |
| 32 | + } |
| 33 | +} |
| 34 | + |
| 35 | +func newNumberValue(v float64) *types.Value { |
| 36 | + return &types.Value{ |
| 37 | + Kind: &types.Value_NumberValue{ |
| 38 | + NumberValue: v, |
| 39 | + }, |
| 40 | + } |
| 41 | +} |
| 42 | + |
| 43 | +// ToValue converts an interface{} to a types.Value |
| 44 | +func ToValue(v interface{}) *types.Value { |
| 45 | + switch v := v.(type) { |
| 46 | + case nil: |
| 47 | + return nil |
| 48 | + case bool: |
| 49 | + return newBoolValue(v) |
| 50 | + case int: |
| 51 | + return newNumberValue(float64(v)) |
| 52 | + case int8: |
| 53 | + return newNumberValue(float64(v)) |
| 54 | + case int32: |
| 55 | + return newNumberValue(float64(v)) |
| 56 | + case int64: |
| 57 | + return newNumberValue(float64(v)) |
| 58 | + case uint: |
| 59 | + return newNumberValue(float64(v)) |
| 60 | + case uint8: |
| 61 | + return newNumberValue(float64(v)) |
| 62 | + case uint32: |
| 63 | + return newNumberValue(float64(v)) |
| 64 | + case uint64: |
| 65 | + return newNumberValue(float64(v)) |
| 66 | + case float32: |
| 67 | + return newNumberValue(float64(v)) |
| 68 | + case float64: |
| 69 | + return newNumberValue(float64(v)) |
| 70 | + case string: |
| 71 | + return &types.Value{ |
| 72 | + Kind: &types.Value_StringValue{ |
| 73 | + StringValue: v, |
| 74 | + }, |
| 75 | + } |
| 76 | + default: |
| 77 | + return toValue(reflect.ValueOf(v)) |
| 78 | + } |
| 79 | +} |
| 80 | + |
| 81 | +func toValue(v reflect.Value) *types.Value { |
| 82 | + switch v.Kind() { |
| 83 | + case reflect.Bool: |
| 84 | + return newBoolValue(v.Bool()) |
| 85 | + case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: |
| 86 | + return newNumberValue(float64(v.Int())) |
| 87 | + case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: |
| 88 | + return newNumberValue(float64(v.Uint())) |
| 89 | + case reflect.Float32, reflect.Float64: |
| 90 | + return newNumberValue(v.Float()) |
| 91 | + case reflect.Ptr: |
| 92 | + if v.IsNil() { |
| 93 | + return nil |
| 94 | + } |
| 95 | + return toValue(reflect.Indirect(v)) |
| 96 | + case reflect.Array, reflect.Slice: |
| 97 | + size := v.Len() |
| 98 | + if size == 0 { |
| 99 | + return nil |
| 100 | + } |
| 101 | + values := make([]*types.Value, size) |
| 102 | + for i := 0; i < size; i++ { |
| 103 | + values[i] = toValue(v.Index(i)) |
| 104 | + } |
| 105 | + return &types.Value{ |
| 106 | + Kind: &types.Value_ListValue{ |
| 107 | + ListValue: &types.ListValue{ |
| 108 | + Values: values, |
| 109 | + }, |
| 110 | + }, |
| 111 | + } |
| 112 | + case reflect.Struct: |
| 113 | + t := v.Type() |
| 114 | + size := v.NumField() |
| 115 | + if size == 0 { |
| 116 | + return nil |
| 117 | + } |
| 118 | + fields := make(map[string]*types.Value, size) |
| 119 | + for i := 0; i < size; i++ { |
| 120 | + name := t.Field(i).Name |
| 121 | + if len(name) > 0 { |
| 122 | + fields[name] = toValue(v.Field(i)) |
| 123 | + } |
| 124 | + } |
| 125 | + if len(fields) == 0 { |
| 126 | + return nil |
| 127 | + } |
| 128 | + return &types.Value{ |
| 129 | + Kind: &types.Value_StructValue{ |
| 130 | + StructValue: &types.Struct{ |
| 131 | + Fields: fields, |
| 132 | + }, |
| 133 | + }, |
| 134 | + } |
| 135 | + case reflect.Map: |
| 136 | + keys := v.MapKeys() |
| 137 | + if len(keys) == 0 { |
| 138 | + return nil |
| 139 | + } |
| 140 | + fields := make(map[string]*types.Value, len(keys)) |
| 141 | + for _, k := range keys { |
| 142 | + if k.Kind() == reflect.String { |
| 143 | + fields[k.String()] = toValue(v.MapIndex(k)) |
| 144 | + } |
| 145 | + } |
| 146 | + if len(fields) == 0 { |
| 147 | + return nil |
| 148 | + } |
| 149 | + return &types.Value{ |
| 150 | + Kind: &types.Value_StructValue{ |
| 151 | + StructValue: &types.Struct{ |
| 152 | + Fields: fields, |
| 153 | + }, |
| 154 | + }, |
| 155 | + } |
| 156 | + default: |
| 157 | + return &types.Value{ |
| 158 | + Kind: &types.Value_StringValue{ |
| 159 | + StringValue: fmt.Sprint(v), |
| 160 | + }, |
| 161 | + } |
| 162 | + } |
| 163 | +} |
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