mirror of
https://github.com/sosedoff/pgweb.git
synced 2024-12-17 13:52:32 +03:00
253 lines
6.8 KiB
Go
253 lines
6.8 KiB
Go
package validator
|
|
|
|
import (
|
|
"reflect"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
const (
|
|
blank = ""
|
|
namespaceSeparator = "."
|
|
leftBracket = "["
|
|
rightBracket = "]"
|
|
restrictedTagChars = ".[],|=+()`~!@#$%^&*\\\"/?<>{}"
|
|
restrictedAliasErr = "Alias '%s' either contains restricted characters or is the same as a restricted tag needed for normal operation"
|
|
restrictedTagErr = "Tag '%s' either contains restricted characters or is the same as a restricted tag needed for normal operation"
|
|
)
|
|
|
|
var (
|
|
restrictedTags = map[string]struct{}{
|
|
diveTag: {},
|
|
existsTag: {},
|
|
structOnlyTag: {},
|
|
omitempty: {},
|
|
skipValidationTag: {},
|
|
utf8HexComma: {},
|
|
utf8Pipe: {},
|
|
noStructLevelTag: {},
|
|
}
|
|
)
|
|
|
|
// ExtractType gets the actual underlying type of field value.
|
|
// It will dive into pointers, customTypes and return you the
|
|
// underlying value and it's kind.
|
|
// it is exposed for use within you Custom Functions
|
|
func (v *Validate) ExtractType(current reflect.Value) (reflect.Value, reflect.Kind) {
|
|
|
|
val, k, _ := v.extractTypeInternal(current, false)
|
|
return val, k
|
|
}
|
|
|
|
// only exists to not break backward compatibility, needed to return the third param for a bug fix internally
|
|
func (v *Validate) extractTypeInternal(current reflect.Value, nullable bool) (reflect.Value, reflect.Kind, bool) {
|
|
|
|
switch current.Kind() {
|
|
case reflect.Ptr:
|
|
|
|
nullable = true
|
|
|
|
if current.IsNil() {
|
|
return current, reflect.Ptr, nullable
|
|
}
|
|
|
|
return v.extractTypeInternal(current.Elem(), nullable)
|
|
|
|
case reflect.Interface:
|
|
|
|
nullable = true
|
|
|
|
if current.IsNil() {
|
|
return current, reflect.Interface, nullable
|
|
}
|
|
|
|
return v.extractTypeInternal(current.Elem(), nullable)
|
|
|
|
case reflect.Invalid:
|
|
return current, reflect.Invalid, nullable
|
|
|
|
default:
|
|
|
|
if v.hasCustomFuncs {
|
|
|
|
if fn, ok := v.customTypeFuncs[current.Type()]; ok {
|
|
return v.extractTypeInternal(reflect.ValueOf(fn(current)), nullable)
|
|
}
|
|
}
|
|
|
|
return current, current.Kind(), nullable
|
|
}
|
|
}
|
|
|
|
// GetStructFieldOK traverses a struct to retrieve a specific field denoted by the provided namespace and
|
|
// returns the field, field kind and whether is was successful in retrieving the field at all.
|
|
// NOTE: when not successful ok will be false, this can happen when a nested struct is nil and so the field
|
|
// could not be retrieved because it didn't exist.
|
|
func (v *Validate) GetStructFieldOK(current reflect.Value, namespace string) (reflect.Value, reflect.Kind, bool) {
|
|
|
|
current, kind := v.ExtractType(current)
|
|
|
|
if kind == reflect.Invalid {
|
|
return current, kind, false
|
|
}
|
|
|
|
if namespace == blank {
|
|
return current, kind, true
|
|
}
|
|
|
|
switch kind {
|
|
|
|
case reflect.Ptr, reflect.Interface:
|
|
|
|
return current, kind, false
|
|
|
|
case reflect.Struct:
|
|
|
|
typ := current.Type()
|
|
fld := namespace
|
|
ns := namespace
|
|
|
|
if typ != timeType && typ != timePtrType {
|
|
|
|
idx := strings.Index(namespace, namespaceSeparator)
|
|
|
|
if idx != -1 {
|
|
fld = namespace[:idx]
|
|
ns = namespace[idx+1:]
|
|
} else {
|
|
ns = blank
|
|
}
|
|
|
|
bracketIdx := strings.Index(fld, leftBracket)
|
|
if bracketIdx != -1 {
|
|
fld = fld[:bracketIdx]
|
|
|
|
ns = namespace[bracketIdx:]
|
|
}
|
|
|
|
current = current.FieldByName(fld)
|
|
|
|
return v.GetStructFieldOK(current, ns)
|
|
}
|
|
|
|
case reflect.Array, reflect.Slice:
|
|
idx := strings.Index(namespace, leftBracket)
|
|
idx2 := strings.Index(namespace, rightBracket)
|
|
|
|
arrIdx, _ := strconv.Atoi(namespace[idx+1 : idx2])
|
|
|
|
if arrIdx >= current.Len() {
|
|
return current, kind, false
|
|
}
|
|
|
|
startIdx := idx2 + 1
|
|
|
|
if startIdx < len(namespace) {
|
|
if namespace[startIdx:startIdx+1] == namespaceSeparator {
|
|
startIdx++
|
|
}
|
|
}
|
|
|
|
return v.GetStructFieldOK(current.Index(arrIdx), namespace[startIdx:])
|
|
|
|
case reflect.Map:
|
|
idx := strings.Index(namespace, leftBracket) + 1
|
|
idx2 := strings.Index(namespace, rightBracket)
|
|
|
|
endIdx := idx2
|
|
|
|
if endIdx+1 < len(namespace) {
|
|
if namespace[endIdx+1:endIdx+2] == namespaceSeparator {
|
|
endIdx++
|
|
}
|
|
}
|
|
|
|
key := namespace[idx:idx2]
|
|
|
|
switch current.Type().Key().Kind() {
|
|
case reflect.Int:
|
|
i, _ := strconv.Atoi(key)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(i)), namespace[endIdx+1:])
|
|
case reflect.Int8:
|
|
i, _ := strconv.ParseInt(key, 10, 8)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(int8(i))), namespace[endIdx+1:])
|
|
case reflect.Int16:
|
|
i, _ := strconv.ParseInt(key, 10, 16)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(int16(i))), namespace[endIdx+1:])
|
|
case reflect.Int32:
|
|
i, _ := strconv.ParseInt(key, 10, 32)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(int32(i))), namespace[endIdx+1:])
|
|
case reflect.Int64:
|
|
i, _ := strconv.ParseInt(key, 10, 64)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(i)), namespace[endIdx+1:])
|
|
case reflect.Uint:
|
|
i, _ := strconv.ParseUint(key, 10, 0)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(uint(i))), namespace[endIdx+1:])
|
|
case reflect.Uint8:
|
|
i, _ := strconv.ParseUint(key, 10, 8)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(uint8(i))), namespace[endIdx+1:])
|
|
case reflect.Uint16:
|
|
i, _ := strconv.ParseUint(key, 10, 16)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(uint16(i))), namespace[endIdx+1:])
|
|
case reflect.Uint32:
|
|
i, _ := strconv.ParseUint(key, 10, 32)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(uint32(i))), namespace[endIdx+1:])
|
|
case reflect.Uint64:
|
|
i, _ := strconv.ParseUint(key, 10, 64)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(i)), namespace[endIdx+1:])
|
|
case reflect.Float32:
|
|
f, _ := strconv.ParseFloat(key, 32)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(float32(f))), namespace[endIdx+1:])
|
|
case reflect.Float64:
|
|
f, _ := strconv.ParseFloat(key, 64)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(f)), namespace[endIdx+1:])
|
|
case reflect.Bool:
|
|
b, _ := strconv.ParseBool(key)
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(b)), namespace[endIdx+1:])
|
|
|
|
// reflect.Type = string
|
|
default:
|
|
return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(key)), namespace[endIdx+1:])
|
|
}
|
|
}
|
|
|
|
// if got here there was more namespace, cannot go any deeper
|
|
panic("Invalid field namespace")
|
|
}
|
|
|
|
// asInt returns the parameter as a int64
|
|
// or panics if it can't convert
|
|
func asInt(param string) int64 {
|
|
|
|
i, err := strconv.ParseInt(param, 0, 64)
|
|
panicIf(err)
|
|
|
|
return i
|
|
}
|
|
|
|
// asUint returns the parameter as a uint64
|
|
// or panics if it can't convert
|
|
func asUint(param string) uint64 {
|
|
|
|
i, err := strconv.ParseUint(param, 0, 64)
|
|
panicIf(err)
|
|
|
|
return i
|
|
}
|
|
|
|
// asFloat returns the parameter as a float64
|
|
// or panics if it can't convert
|
|
func asFloat(param string) float64 {
|
|
|
|
i, err := strconv.ParseFloat(param, 64)
|
|
panicIf(err)
|
|
|
|
return i
|
|
}
|
|
|
|
func panicIf(err error) {
|
|
if err != nil {
|
|
panic(err.Error())
|
|
}
|
|
}
|