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package json
import (
"fmt"
"github.com/mongodb/mongo-tools/common/util"
"reflect"
)
// Transition functions for recognizing Date.
// Adapted from encoding/json/scanner.go.
// stateDa is the state after reading `Da`.
func stateDa(s *scanner, c int) int {
if c == 't' {
s.step = stateDat
return scanContinue
}
return s.error(c, "in literal Date (expecting 't')")
}
// stateDat is the state after reading `Dat`.
func stateDat(s *scanner, c int) int {
if c == 'e' {
s.step = stateConstructor
return scanContinue
}
return s.error(c, "in literal Date (expecting 'e')")
}
// Decodes a Date literal stored in the underlying byte data into v.
func (d *decodeState) storeDate(v reflect.Value) {
op := d.scanWhile(scanSkipSpace)
if op != scanBeginCtor {
d.error(fmt.Errorf("expected beginning of constructor"))
}
args, err := d.ctor("Date", []reflect.Type{dateType})
if err != nil {
d.error(err)
}
switch kind := v.Kind(); kind {
case reflect.Interface:
v.Set(args[0])
default:
d.error(fmt.Errorf("cannot store %v value into %v type", dateType, kind))
}
}
// Returns a Date literal from the underlying byte data.
func (d *decodeState) getDate() interface{} {
op := d.scanWhile(scanSkipSpace)
if op != scanBeginCtor {
d.error(fmt.Errorf("expected beginning of constructor"))
}
// Prevent d.convertNumber() from parsing the argument as a float64.
useNumber := d.useNumber
d.useNumber = true
args := d.ctorInterface()
if err := ctorNumArgsMismatch("Date", 1, len(args)); err != nil {
d.error(err)
}
arg0num, isNumber := args[0].(Number)
if !isNumber {
// validate the date format of the string
_, err := util.FormatDate(args[0].(string))
if err != nil {
d.error(fmt.Errorf("unexpected ISODate format"))
}
d.useNumber = useNumber
return ISODate(args[0].(string))
}
arg0, err := arg0num.Int64()
if err != nil {
d.error(fmt.Errorf("expected int64 for first argument of Date constructor"))
}
d.useNumber = useNumber
return Date(arg0)
}
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