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comparators.go
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comparators.go
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package AlgoeDB
import (
"errors"
"regexp"
)
func MoreThan(value float64) QueryFunc {
return func(target interface{}) bool {
number, err := getNumber(target)
if err != nil {
return false
}
return number > value
}
}
func MoreThanOrEqual(value float64) QueryFunc {
return func(target interface{}) bool {
number, err := getNumber(target)
if err != nil {
return false
}
return number >= value
}
}
func LessThan(value float64) QueryFunc {
return func(target interface{}) bool {
number, err := getNumber(target)
if err != nil {
return false
}
return number < value
}
}
func LessThanOrEqual(value float64) QueryFunc {
return func(target interface{}) bool {
number, err := getNumber(target)
if err != nil {
return false
}
return number <= value
}
}
func Between(lowValue float64, highValue float64) QueryFunc {
return func(target interface{}) bool {
number, err := getNumber(target)
if err != nil {
return false
}
return number < highValue && number > lowValue
}
}
func BetweenOrEqual(lowValue float64, highValue float64) QueryFunc {
return func(target interface{}) bool {
number, err := getNumber(target)
if err != nil {
return false
}
return number <= highValue && number >= lowValue
}
}
func Exists() QueryFunc {
return func(target interface{}) bool {
return target != nil
}
}
func Matches(pattern string) QueryFunc {
return func(target interface{}) bool {
switch x := target.(type) {
case string:
ok, _ := regexp.MatchString(pattern, x)
if ok {
return true
}
return false
default:
return false
}
}
}
func SliceContainsString(item string) QueryFunc {
return func(target interface{}) bool {
switch x := target.(type) {
case []string:
for _, value := range x {
if item == value {
return true
}
}
return false
default:
return false
}
}
}
func And(queryValues ...QueryFunc) QueryFunc {
return func(target interface{}) bool {
for _, queryValue := range queryValues {
if !matchValues(queryValue, target) {
return false
}
}
return true
}
}
func Or(queryValues ...QueryFunc) QueryFunc {
return func(target interface{}) bool {
for _, queryValue := range queryValues {
if matchValues(queryValue, target) {
return true
}
}
return false
}
}
func Not(queryValue QueryFunc) QueryFunc {
return func(target interface{}) bool {
return !matchValues(queryValue, target)
}
}
func getNumber(value interface{}) (float64, error) {
switch x := value.(type) {
case uint8:
return float64(x), nil
case int8:
return float64(x), nil
case uint16:
return float64(x), nil
case int16:
return float64(x), nil
case uint32:
return float64(x), nil
case int32:
return float64(x), nil
case uint64:
return float64(x), nil
case int64:
return float64(x), nil
case int:
return float64(x), nil
case float32:
return float64(x), nil
case float64:
return float64(x), nil
default:
return 0, errors.New("could not convert number")
}
}