/
go.go
221 lines (175 loc) Β· 4.12 KB
/
go.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
package provider
import (
"fmt"
"reflect"
"github.com/evcc-io/evcc/provider/golang"
"github.com/evcc-io/evcc/util"
"github.com/traefik/yaegi/interp"
)
// Go implements Go request provider
type Go struct {
vm *interp.Interpreter
script string
in []inputTransformation
out []outputTransformation
}
func init() {
registry.Add("go", NewGoProviderFromConfig)
}
// NewGoProviderFromConfig creates a Go provider
func NewGoProviderFromConfig(other map[string]interface{}) (Provider, error) {
var cc struct {
VM string
Script string
In []transformationConfig
Out []transformationConfig
}
if err := util.DecodeOther(other, &cc); err != nil {
return nil, err
}
vm, err := golang.RegisteredVM(cc.VM, "")
if err != nil {
return nil, err
}
in, err := configureInputs(cc.In)
if err != nil {
return nil, err
}
out, err := configureOutputs(cc.Out)
if err != nil {
return nil, err
}
p := &Go{
vm: vm,
script: cc.Script,
in: in,
out: out,
}
return p, nil
}
var _ FloatProvider = (*Go)(nil)
// FloatGetter parses float from request
func (p *Go) FloatGetter() (func() (float64, error), error) {
return func() (float64, error) {
v, err := p.handleGetter()
if err != nil {
return 0, err
}
vv, ok := v.(float64)
if !ok {
return 0, fmt.Errorf("not a float: %v", v)
}
return vv, nil
}, nil
}
var _ IntProvider = (*Go)(nil)
// IntGetter parses int64 from request
func (p *Go) IntGetter() (func() (int64, error), error) {
return func() (int64, error) {
v, err := p.handleGetter()
if err != nil {
return 0, err
}
vv, ok := v.(int64)
if !ok {
return 0, fmt.Errorf("not a int: %v", v)
}
return vv, nil
}, nil
}
var _ StringProvider = (*Go)(nil)
// StringGetter parses string from request
func (p *Go) StringGetter() (func() (string, error), error) {
return func() (string, error) {
v, err := p.handleGetter()
if err != nil {
return "", err
}
vv, ok := v.(string)
if !ok {
return "", fmt.Errorf("not a string: %v", v)
}
return vv, nil
}, nil
}
var _ BoolProvider = (*Go)(nil)
// BoolGetter parses bool from request
func (p *Go) BoolGetter() (func() (bool, error), error) {
return func() (bool, error) {
v, err := p.handleGetter()
if err != nil {
return false, err
}
vv, ok := v.(bool)
if !ok {
return false, fmt.Errorf("not a bool: %v", v)
}
return vv, nil
}, nil
}
func (p *Go) handleGetter() (any, error) {
if err := transformInputs(p.in, p.setParam); err != nil {
return nil, err
}
return p.evaluate()
}
func (p *Go) handleSetter(param string, val any) error {
if err := p.setParam(param, val); err != nil {
return err
}
vv, err := p.evaluate()
if err != nil {
return err
}
return transformOutputs(p.out, vv)
}
func (p *Go) evaluate() (res any, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("panic: %v", r)
}
}()
v, err := p.vm.Eval(p.script)
if err != nil {
return nil, err
}
if (v.Kind() == reflect.Pointer || v.Kind() == reflect.Interface) && v.IsNil() {
return nil, nil
}
return normalizeValue(v.Interface())
}
func (p *Go) setParam(param string, val any) error {
if str, ok := val.(string); ok {
val = "\"" + str + "\""
}
_, err := p.vm.Eval(fmt.Sprintf("%s := %v;", param, val))
return err
}
var _ SetIntProvider = (*Go)(nil)
// IntSetter sends int request
func (p *Go) IntSetter(param string) (func(int64) error, error) {
return func(val int64) error {
return p.handleSetter(param, val)
}, nil
}
var _ SetFloatProvider = (*Go)(nil)
// FloatSetter sends float request
func (p *Go) FloatSetter(param string) (func(float64) error, error) {
return func(val float64) error {
return p.handleSetter(param, val)
}, nil
}
var _ SetStringProvider = (*Go)(nil)
// StringSetter sends string request
func (p *Go) StringSetter(param string) (func(string) error, error) {
return func(val string) error {
return p.handleSetter(param, val)
}, nil
}
var _ SetBoolProvider = (*Go)(nil)
// BoolSetter sends bool request
func (p *Go) BoolSetter(param string) (func(bool) error, error) {
return func(val bool) error {
return p.handleSetter(param, val)
}, nil
}