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validator_string_p.go
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validator_string_p.go
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package valgo
import (
"regexp"
)
// The String pointer validator type that keeps its validator context.
type ValidatorStringP[T ~string] struct {
context *ValidatorContext
}
// Receives a string pointer to validate.
//
// The value also can be a custom boolean type such as `type Status *string;`
//
// Optionally, the function can receive a name and title, in that order,
// to be used in the error messages. A `value_%N`` pattern is used as a name in
// error messages if a name and title are not supplied; for example: value_0.
// When the name is provided but not the title, then the name is humanized to be
// used as the title as well; for example the name `phone_number` will be
// humanized as `Phone Number`
func StringP[T ~string](value *T, nameAndTitle ...string) *ValidatorStringP[T] {
return &ValidatorStringP[T]{context: NewContext(value, nameAndTitle...)}
}
// Return the context of the validator. The context is useful to create a custom
// validator by extending this validator.
func (validator *ValidatorStringP[T]) Context() *ValidatorContext {
return validator.context
}
// Invert the logical value associated to the next validator function.
// For example:
//
// // It will return false because Not() inverts the boolean value associated with the Blank() function
// status := ""
// Is(v.StringP(&status).Not().Blank()).Valid()
func (validator *ValidatorStringP[T]) Not() *ValidatorStringP[T] {
validator.context.Not()
return validator
}
// Validate if the value of a string pointer is equal to a another value.
// For example:
//
// status := "running"
// Is(v.StringP(&status).Equal("running"))
func (validator *ValidatorStringP[T]) EqualTo(value T, template ...string) *ValidatorStringP[T] {
validator.context.AddWithValue(
func() bool {
return validator.context.Value().(*T) != nil && isStringEqualTo(*(validator.context.Value().(*T)), value)
},
ErrorKeyEqualTo, value, template...)
return validator
}
// Validate if a string value is greater than another. This function internally
// uses the golang `>` operator.
// For example:
//
// section := "bb"
// Is(v.StringP(§ion).GreaterThan("ba"))
func (validator *ValidatorStringP[T]) GreaterThan(value T, template ...string) *ValidatorStringP[T] {
validator.context.AddWithValue(
func() bool {
return validator.context.Value().(*T) != nil && isStringGreaterThan(*(validator.context.Value().(*T)), value)
},
ErrorKeyGreaterThan, value, template...)
return validator
}
// Validate if a string value is greater than or equal to another. This function
// internally uses the golang `>=` operator.
// For example:
//
// section := "bc"
// Is(v.StringP(§ion).GreaterOrEqualTo("bc"))
func (validator *ValidatorStringP[T]) GreaterOrEqualTo(value T, template ...string) *ValidatorStringP[T] {
validator.context.AddWithValue(
func() bool {
return validator.context.Value().(*T) != nil && isStringGreaterOrEqualTo(*(validator.context.Value().(*T)), value)
},
ErrorKeyGreaterOrEqualTo, value, template...)
return validator
}
// Validate if a string value is less than another. This function internally
// uses the golang `<` operator.
// For example:
//
// section := "bb"
// Is(v.StringP(§ion).LessThan("bc"))
func (validator *ValidatorStringP[T]) LessThan(value T, template ...string) *ValidatorStringP[T] {
validator.context.AddWithValue(
func() bool {
return validator.context.Value().(*T) != nil && isStringLessThan(*(validator.context.Value().(*T)), value)
},
ErrorKeyLessThan, value, template...)
return validator
}
// Validate if a string value is less or equal to another. This function
// internally uses the golang `<=` operator to compare two strings.
// For example:
//
// section := "bc"
// Is(v.StringP(§ion).LessOrEqualTo("bc"))
func (validator *ValidatorStringP[T]) LessOrEqualTo(value T, template ...string) *ValidatorStringP[T] {
validator.context.AddWithValue(
func() bool {
return validator.context.Value().(*T) != nil && isStringLessOrEqualTo(*(validator.context.Value().(*T)), value)
},
ErrorKeyLessOrEqualTo, value, template...)
return validator
}
// Validate if a string value is empty. Empty will be false if the length
// of the string is greater than zero, even if the string has only spaces.
// For checking if the string has only spaces, uses the function `Blank()`
// instead.
// For example:
//
// status := ""
// Is(v.StringP(&status).Empty()) // Will be true
// status = " "
// Is(v.StringP(&status).Empty()) // Will be false
func (validator *ValidatorStringP[T]) Empty(template ...string) *ValidatorStringP[T] {
validator.context.Add(
func() bool {
return validator.context.Value().(*T) != nil && isStringEmpty(*(validator.context.Value().(*T)))
},
ErrorKeyEmpty, template...)
return validator
}
// Validate if a string value is empty or nil. Empty will be false if the length
// of the string is greater than zero, even if the string has only spaces.
// For checking if the string has only spaces, uses the function `BlankOrNil()`
// instead.
// For example:
//
// status := ""
// Is(v.StringP(&status).EmptyOrNil()) // Will be true
// status = " "
// Is(v.StringP(&status).EmptyOrNil()) // Will be false
// var _status *string
// Is(v.StringP(_status).EmptyOrNil()) // Will be true
func (validator *ValidatorStringP[T]) EmptyOrNil(template ...string) *ValidatorStringP[T] {
validator.context.Add(
func() bool {
return validator.context.Value().(*T) == nil || isStringEmpty(*(validator.context.Value().(*T)))
},
ErrorKeyEmpty, template...)
return validator
}
// Validate if a string value is blank. Blank will be true if the length
// of the string is zero or if the string only has spaces.
// For example:
//
// status := ""
// Is(v.StringP(&status).Blank()) // Will be true
// status = " "
// Is(v.StringP(&status).Blank()) // Will be true
func (validator *ValidatorStringP[T]) Blank(template ...string) *ValidatorStringP[T] {
validator.context.Add(
func() bool {
return validator.context.Value().(*T) != nil && isStringBlank(*(validator.context.Value().(*T)))
},
ErrorKeyBlank, template...)
return validator
}
// Validate if a string value is blank or nil. Blank will be true if the length
// of the string is zero or if the string only has spaces.
// For example:
//
// status := ""
// Is(v.StringP(&status).BlankOrNil()) // Will be true
// status = " "
// Is(v.StringP(&status).BlankOrNil()) // Will be true
// var _status *string
// Is(v.StringP(_status).BlankOrNil()) // Will be true
func (validator *ValidatorStringP[T]) BlankOrNil(template ...string) *ValidatorStringP[T] {
validator.context.Add(
func() bool {
return validator.context.Value().(*T) == nil || isStringBlank(*(validator.context.Value().(*T)))
},
ErrorKeyBlank, template...)
return validator
}
// Validate if a string pointer pass a custom function.
// For example:
//
// status := ""
// Is(v.StringP(&status).Passing((v string) bool {
// return v == getNewStatus()
// })
func (validator *ValidatorStringP[T]) Passing(function func(v0 *T) bool, template ...string) *ValidatorStringP[T] {
validator.context.Add(
func() bool {
return function(validator.context.Value().(*T))
},
ErrorKeyPassing, template...)
return validator
}
// Validate if the value of a string pointer is present in a string slice.
// For example:
//
// status := "idle"
// validStatus := []string{"idle", "paused", "stopped"}
// Is(v.StringP(&status).InSlice(validStatus))
func (validator *ValidatorStringP[T]) InSlice(slice []T, template ...string) *ValidatorStringP[T] {
validator.context.AddWithValue(
func() bool {
return validator.context.Value().(*T) != nil && isStringInSlice(*(validator.context.Value().(*T)), slice)
},
ErrorKeyInSlice, validator.context.Value(), template...)
return validator
}
// Validate if the value of a string pointer match a regular expression.
// For example:
//
// status := "pre-approved"
// regex, _ := regexp.Compile("pre-.+")
// Is(v.StringP(&status).MatchingTo(regex))
func (validator *ValidatorStringP[T]) MatchingTo(regex *regexp.Regexp, template ...string) *ValidatorStringP[T] {
validator.context.AddWithParams(
func() bool {
return validator.context.Value().(*T) != nil && isStringMatchingTo(*(validator.context.Value().(*T)), regex)
},
ErrorKeyMatchingTo,
map[string]any{"title": validator.context.title, "regexp": regex},
template...)
return validator
}
// Validate if the maximum length of a string pointer's value.
// For example:
//
// slug := "myname"
// Is(v.StringP(&slug).MaxLength(6))
func (validator *ValidatorStringP[T]) MaxLength(length int, template ...string) *ValidatorStringP[T] {
validator.context.AddWithParams(
func() bool {
return validator.context.Value().(*T) != nil && isStringMaxLength(*(validator.context.Value().(*T)), length)
},
ErrorKeyMaxLength,
map[string]any{"title": validator.context.title, "length": length},
template...)
return validator
}
// Validate the minimum length of a string pointer's value
// For example:
//
// slug := "myname"
// Is(v.StringP(&slug).MinLength(6))
func (validator *ValidatorStringP[T]) MinLength(length int, template ...string) *ValidatorStringP[T] {
validator.context.AddWithParams(
func() bool {
return validator.context.Value().(*T) != nil && isStringMinLength(*(validator.context.Value().(*T)), length)
},
ErrorKeyMinLength,
map[string]any{"title": validator.context.title, "length": length},
template...)
return validator
}
// Validate the length of a string pointer's value.
// For example:
//
// slug := "myname"
// Is(v.StringP(&slug).OfLength(6))
func (validator *ValidatorStringP[T]) OfLength(length int, template ...string) *ValidatorStringP[T] {
validator.context.AddWithParams(
func() bool {
return validator.context.Value().(*T) != nil && isStringLength(*(validator.context.Value().(*T)), length)
},
ErrorKeyLength,
map[string]any{"title": validator.context.title, "length": length},
template...)
return validator
}
// Validate if the length of a string pointer's value is in a range (inclusive).
// For example:
//
// slug := "myname"
// Is(v.StringP(&slug).OfLengthBetween(2,6))
func (validator *ValidatorStringP[T]) OfLengthBetween(min int, max int, template ...string) *ValidatorStringP[T] {
validator.context.AddWithParams(
func() bool {
return validator.context.Value().(*T) != nil && isStringLengthBetween(*(validator.context.Value().(*T)), min, max)
},
ErrorKeyLengthBetween,
map[string]any{"title": validator.context.title, "min": min, "max": max},
template...)
return validator
}
// Validate if the value of a string is in a range (inclusive).
// For example:
//
// slug := "myname"
// Is(v.StringP(&slug).Between(2,6))
func (validator *ValidatorStringP[T]) Between(min T, max T, template ...string) *ValidatorStringP[T] {
validator.context.AddWithParams(
func() bool {
return validator.context.Value().(*T) != nil && isStringBetween(*(validator.context.Value().(*T)), min, max)
},
ErrorKeyBetween,
map[string]any{"title": validator.context.title, "min": min, "max": max},
template...)
return validator
}
// Validate if a string pointer is nil.
// For example:
//
// var status *string
// Is(v.StringP(status).Nil())
func (validator *ValidatorStringP[T]) Nil(template ...string) *ValidatorStringP[T] {
validator.context.Add(
func() bool {
return validator.context.Value().(*T) == nil
},
ErrorKeyNil, template...)
return validator
}