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field_data.go
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/
field_data.go
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package framework
import (
"encoding/json"
"fmt"
"github.com/hashicorp/vault/helper/duration"
"github.com/mitchellh/mapstructure"
)
// FieldData is the structure passed to the callback to handle a path
// containing the populated parameters for fields. This should be used
// instead of the raw (*vault.Request).Data to access data in a type-safe
// way.
type FieldData struct {
Raw map[string]interface{}
Schema map[string]*FieldSchema
}
// Cycle through raw data and validate conversions in
// the schema, so we don't get an error/panic later when
// trying to get data out. Data not in the schema is not
// an error at this point, so we don't worry about it.
func (d *FieldData) Validate() error {
for field, value := range d.Raw {
schema, ok := d.Schema[field]
if !ok {
continue
}
switch schema.Type {
case TypeBool, TypeInt, TypeMap, TypeDurationSecond, TypeString:
_, _, err := d.getPrimitive(field, schema)
if err != nil {
return fmt.Errorf("Error converting input %v for field %s: %s", value, field, err)
}
default:
return fmt.Errorf("unknown field type %s for field %s",
schema.Type, field)
}
}
return nil
}
// Get gets the value for the given field. If the key is an invalid field,
// FieldData will panic. If you want a safer version of this method, use
// GetOk. If the field k is not set, the default value (if set) will be
// returned, otherwise the zero value will be returned.
func (d *FieldData) Get(k string) interface{} {
schema, ok := d.Schema[k]
if !ok {
panic(fmt.Sprintf("field %s not in the schema", k))
}
value, ok := d.GetOk(k)
if !ok {
value = schema.DefaultOrZero()
}
return value
}
// GetDefaultOrZero gets the default value set on the schema for the given
// field. If there is no default value set, the zero value of the type
// will be returned.
func (d *FieldData) GetDefaultOrZero(k string) interface{} {
schema, ok := d.Schema[k]
if !ok {
panic(fmt.Sprintf("field %s not in the schema", k))
}
return schema.DefaultOrZero()
}
// GetOk gets the value for the given field. The second return value
// will be false if the key is invalid or the key is not set at all.
func (d *FieldData) GetOk(k string) (interface{}, bool) {
schema, ok := d.Schema[k]
if !ok {
return nil, false
}
result, ok, err := d.GetOkErr(k)
if err != nil {
panic(fmt.Sprintf("error reading %s: %s", k, err))
}
if ok && result == nil {
result = schema.DefaultOrZero()
}
return result, ok
}
// GetOkErr is the most conservative of all the Get methods. It returns
// whether key is set or not, but also an error value. The error value is
// non-nil if the field doesn't exist or there was an error parsing the
// field value.
func (d *FieldData) GetOkErr(k string) (interface{}, bool, error) {
schema, ok := d.Schema[k]
if !ok {
return nil, false, fmt.Errorf("unknown field: %s", k)
}
switch schema.Type {
case TypeBool, TypeInt, TypeMap, TypeDurationSecond, TypeString:
return d.getPrimitive(k, schema)
default:
return nil, false,
fmt.Errorf("unknown field type %s for field %s", schema.Type, k)
}
}
func (d *FieldData) getPrimitive(
k string, schema *FieldSchema) (interface{}, bool, error) {
raw, ok := d.Raw[k]
if !ok {
return nil, false, nil
}
switch schema.Type {
case TypeBool:
var result bool
if err := mapstructure.WeakDecode(raw, &result); err != nil {
return nil, true, err
}
return result, true, nil
case TypeInt:
var result int
if err := mapstructure.WeakDecode(raw, &result); err != nil {
return nil, true, err
}
return result, true, nil
case TypeString:
var result string
if err := mapstructure.WeakDecode(raw, &result); err != nil {
return nil, true, err
}
return result, true, nil
case TypeMap:
var result map[string]interface{}
if err := mapstructure.WeakDecode(raw, &result); err != nil {
return nil, true, err
}
return result, true, nil
case TypeDurationSecond:
var result int
switch inp := raw.(type) {
case nil:
return nil, false, nil
case int:
result = inp
case float32:
result = int(inp)
case float64:
result = int(inp)
case string:
dur, err := duration.ParseDurationSecond(inp)
if err != nil {
return nil, true, err
}
result = int(dur.Seconds())
case json.Number:
valInt64, err := inp.Int64()
if err != nil {
return nil, true, err
}
result = int(valInt64)
default:
return nil, false, fmt.Errorf("invalid input '%v'", raw)
}
return result, true, nil
default:
panic(fmt.Sprintf("Unknown type: %s", schema.Type))
}
}