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uint64.go
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uint64.go
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package vl
import (
"fmt"
"strconv"
"strings"
"github.com/speedyhoon/frm"
"github.com/speedyhoon/utl"
)
// Uint64 validates inp as an unsigned 64-bit integer
func Uint64(f *frm.Field, inp ...string) {
if !parseUint64(f, inp...) {
return
}
value := f.Uint64()
if f.Min != nil && value < f.Min.(uint64) || f.Max != nil && value > f.Max.(uint64) {
f.Err = fmt.Sprintf("Must be between %v and %v.", f.Min, f.Max)
return
}
var step uint64
if f.Step == 0 {
step = 1
} else {
step = uint64(f.Step)
}
if value%step != 0 {
below := value - value%step
f.Err = fmt.Sprintf("Please enter a valid value. The two nearest values are %d and %d.", below, below+step)
return
}
}
// Uint64List validates inp as a slice of unsigned 64-bit integers
func Uint64List(f *frm.Field, inp ...string) {
if len(inp) < f.MinLen {
f.Err = fmt.Sprintf("Not enough items selected. At least %v item%s required.", f.MinLen, utl.Plural(len(inp), " is", "s are"))
return
}
var list []uint64
for _, str := range inp {
Uint(f, str)
if f.Err != "" {
return
}
value := f.Uint64()
//check if this value isn't already in the list
for _, num := range list {
if value == num {
f.Err = "Duplicate values found in the list."
return
}
}
list = append(list, value)
}
f.Value = list
}
// Uint64Req enforces an unsigned 64-bit integer to be required
func Uint64Req(f *frm.Field, inp ...string) {
f.Required = true
Uint64(f, inp...)
}
// Uint64Opt unsigned 64-bit integer option slice
func Uint64Opt(f *frm.Field, inp ...string) {
if !parseUint64(f, inp...) || len(f.Options) < 1 {
return
}
var ok bool
for _, option := range f.Options {
ok = f.Value == option.Value
if ok {
break
}
}
if !ok {
f.Err = "Please select from one of the options."
}
}
// parseUint64 returns false upon validation failure
func parseUint64(f *frm.Field, inp ...string) bool {
u, err := strconv.ParseUint(strings.TrimSpace(inp[0]), 10, 64)
if err != nil {
//Return error if input string failed to convert.
f.Err = err.Error()
return false
}
f.Value = u
return f.Required && f.Uint64() != 0
}