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constraint.go
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constraint.go
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package sqlite
import (
"fmt"
"strconv"
"strings"
)
var (
IsNotInteger = fmt.Errorf("is not inetger")
IsSignedIntegerError = fmt.Errorf("is not signed integer")
IsNotString = fmt.Errorf("is not string")
IsNotBoolError = fmt.Errorf("is not bool")
HasNoPrimaryKeyError = fmt.Errorf("has no primary key")
NotEmptyError = fmt.Errorf("not empty")
VarCharTooLongError = fmt.Errorf("varchar too long")
OptionLimitError = fmt.Errorf("option limit error")
DuplicateKeyError = fmt.Errorf("duplicate key")
HasNotColumnError = fmt.Errorf("has no such column")
TableError = fmt.Errorf("has no such table")
SyntaxError = fmt.Errorf("syntax error")
)
func Compose(fns ...func(data string) error) func(data string) error {
return func(data string) error {
for _, fn := range fns {
if err := fn(data); err != nil {
return err
}
}
return nil
}
}
func NotEmpty(data string) error {
if data == `""` {
return NotEmptyError
}
return nil
}
func IsInteger(data string) error {
_, err := strconv.Atoi(data)
if err != nil {
return IsNotInteger
}
return nil
}
func IsSignedInteger(data string) error {
d, err := strconv.Atoi(data)
if err != nil {
return IsNotInteger
}
if d < 0 {
return IsSignedIntegerError
}
return nil
}
func IsString(data string) error {
if !strings.HasPrefix(data, "\"") {
return IsNotString
}
if !strings.HasSuffix(data, "\"") {
return IsNotString
}
return nil
}
func IsBool(data string) error {
d := strings.ToUpper(data)
if d != "TRUE" && d != "FALSE" {
return IsNotBoolError
}
return nil
}
func VarcharTooLong(data string, maxLen int) error {
data = TrimQuotes(data)
d := []rune(data)
if len(d) > maxLen {
return VarCharTooLongError
}
return nil
}
func OptionLimit[T int | string](data T, options []T) error {
for _, option := range options {
if data == option {
return nil
}
}
return OptionLimitError
}