govalidator

package
Version: v0.0.0-...-d88c8b5 Latest Latest
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Published: Feb 9, 2021 License: Apache-2.0 Imports: 23 Imported by: 0

Documentation

Overview

Package govalidator is package of validators and sanitizers for strings, structs and collections.

Index

Constants

View Source
const (
	Email          string = "" /* 1208-byte string literal not displayed */
	CreditCard     string = "" /* 151-byte string literal not displayed */
	ISBN10         string = "^(?:[0-9]{9}X|[0-9]{10})$"
	ISBN13         string = "^(?:[0-9]{13})$"
	UUID3          string = "^[0-9a-f]{8}-[0-9a-f]{4}-3[0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}$"
	UUID4          string = "^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$"
	UUID5          string = "^[0-9a-f]{8}-[0-9a-f]{4}-5[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$"
	UUID           string = "^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$"
	Alpha          string = "^[a-zA-Z]+$"
	Alphanumeric   string = "^[a-zA-Z0-9]+$"
	Numeric        string = "^[0-9]+$"
	Int            string = "^(?:[-+]?(?:0|[1-9][0-9]*))$"
	Float          string = "^(?:[-+]?(?:[0-9]+))?(?:\\.[0-9]*)?(?:[eE][\\+\\-]?(?:[0-9]+))?$"
	Hexadecimal    string = "^[0-9a-fA-F]+$"
	Hexcolor       string = "^#?([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$"
	RGBcolor       string = "" /* 157-byte string literal not displayed */
	ASCII          string = "^[\x00-\x7F]+$"
	Multibyte      string = "[^\x00-\x7F]"
	FullWidth      string = "[^\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]"
	HalfWidth      string = "[\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]"
	Base64         string = "^(?:[A-Za-z0-9+\\/]{4})*(?:[A-Za-z0-9+\\/]{2}==|[A-Za-z0-9+\\/]{3}=|[A-Za-z0-9+\\/]{4})$"
	PrintableASCII string = "^[\x20-\x7E]+$"
	DataURI        string = "^data:.+\\/(.+);base64$"
	Latitude       string = "^[-+]?([1-8]?\\d(\\.\\d+)?|90(\\.0+)?)$"
	Longitude      string = "^[-+]?(180(\\.0+)?|((1[0-7]\\d)|([1-9]?\\d))(\\.\\d+)?)$"
	DNSName        string = `^([a-zA-Z0-9_]{1}[a-zA-Z0-9_-]{0,62}){1}(\.[a-zA-Z0-9_]{1}[a-zA-Z0-9_-]{0,62})*[\._]?$`
	IP             string = `` /* 659-byte string literal not displayed */
	URLSchema      string = `((ftp|tcp|udp|wss?|https?):\/\/)`
	URLUsername    string = `(\S+(:\S*)?@)`
	URLPath        string = `((\/|\?|#)[^\s]*)`
	URLPort        string = `(:(\d{1,5}))`
	URLIP          string = `([1-9]\d?|1\d\d|2[01]\d|22[0-3])(\.(1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.([0-9]\d?|1\d\d|2[0-4]\d|25[0-4]))`
	URLSubdomain   string = `((www\.)|([a-zA-Z0-9]+([-_\.]?[a-zA-Z0-9])*[a-zA-Z0-9]\.[a-zA-Z0-9]+))`
	URL            string = `^` + URLSchema + `?` + URLUsername + `?` + `((` + URLIP + `|(\[` + IP + `\])|(([a-zA-Z0-9]([a-zA-Z0-9-_]+)?[a-zA-Z0-9]([-\.][a-zA-Z0-9]+)*)|(` + URLSubdomain + `?))?(([a-zA-Z\x{00a1}-\x{ffff}0-9]+-?-?)*[a-zA-Z\x{00a1}-\x{ffff}0-9]+)(?:\.([a-zA-Z\x{00a1}-\x{ffff}]{1,}))?))\.?` + URLPort + `?` + URLPath + `?$`
	SSN            string = `^\d{3}[- ]?\d{2}[- ]?\d{4}$`
	WinPath        string = `^[a-zA-Z]:\\(?:[^\\/:*?"<>|\r\n]+\\)*[^\\/:*?"<>|\r\n]*$`
	UnixPath       string = `^(/[^/\x00]*)+/?$`
	Semver         string = "" /* 183-byte string literal not displayed */

)

Basic regular expressions for validating strings

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const (
	// Unknown is unresolved OS type
	Unknown = iota
	// Win is Windows type
	Win
	// Unix is *nix OS types
	Unix
)

Used by IsFilePath func

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const RF3339WithoutZone = "2006-01-02T15:04:05"

Variables

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var CustomTypeTagMap = &customTypeTagMap{validators: make(map[string]CustomTypeValidator)}

CustomTypeTagMap is a map of functions that can be used as tags for ValidateStruct function. Use this to validate compound or custom types that need to be handled as a whole, e.g. `type UUID [16]byte` (this would be handled as an array of bytes).

Escape replace <, >, & and " with HTML entities.

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var ISO3166List = []ISO3166Entry{}/* 249 elements not displayed */

ISO3166List based on https://www.iso.org/obp/ui/#search/code/ Code Type "Officially Assigned Codes"

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var ISO4217List = []string{}/* 178 elements not displayed */

ISO4217List is the list of ISO currency codes

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var ISO693List = []ISO693Entry{}/* 184 elements not displayed */

ISO693List based on http://data.okfn.org/data/core/language-codes/r/language-codes-3b2.json

View Source
var ParamTagMap = map[string]ParamValidator{
	"length":       ByteLength,
	"range":        Range,
	"runelength":   RuneLength,
	"stringlength": StringLength,
	"matches":      StringMatches,
	"in":           isInRaw,
	"rsapub":       IsRsaPub,
}

ParamTagMap is a map of functions accept variants parameters

View Source
var ParamTagRegexMap = map[string]*regexp.Regexp{
	"range":        regexp.MustCompile("^range\\((\\d+)\\|(\\d+)\\)$"),
	"length":       regexp.MustCompile("^length\\((\\d+)\\|(\\d+)\\)$"),
	"runelength":   regexp.MustCompile("^runelength\\((\\d+)\\|(\\d+)\\)$"),
	"stringlength": regexp.MustCompile("^stringlength\\((\\d+)\\|(\\d+)\\)$"),
	"in":           regexp.MustCompile(`^in\((.*)\)`),
	"matches":      regexp.MustCompile(`^matches\((.+)\)$`),
	"rsapub":       regexp.MustCompile("^rsapub\\((\\d+)\\)$"),
}

ParamTagRegexMap maps param tags to their respective regexes.

View Source
var TagMap = map[string]Validator{
	"email":              IsEmail,
	"url":                IsURL,
	"dialstring":         IsDialString,
	"requrl":             IsRequestURL,
	"requri":             IsRequestURI,
	"alpha":              IsAlpha,
	"utfletter":          IsUTFLetter,
	"alphanum":           IsAlphanumeric,
	"utfletternum":       IsUTFLetterNumeric,
	"numeric":            IsNumeric,
	"utfnumeric":         IsUTFNumeric,
	"utfdigit":           IsUTFDigit,
	"hexadecimal":        IsHexadecimal,
	"hexcolor":           IsHexcolor,
	"rgbcolor":           IsRGBcolor,
	"lowercase":          IsLowerCase,
	"uppercase":          IsUpperCase,
	"int":                IsInt,
	"float":              IsFloat,
	"null":               IsNull,
	"uuid":               IsUUID,
	"uuidv3":             IsUUIDv3,
	"uuidv4":             IsUUIDv4,
	"uuidv5":             IsUUIDv5,
	"creditcard":         IsCreditCard,
	"isbn10":             IsISBN10,
	"isbn13":             IsISBN13,
	"json":               IsJSON,
	"multibyte":          IsMultibyte,
	"ascii":              IsASCII,
	"printableascii":     IsPrintableASCII,
	"fullwidth":          IsFullWidth,
	"halfwidth":          IsHalfWidth,
	"variablewidth":      IsVariableWidth,
	"base64":             IsBase64,
	"datauri":            IsDataURI,
	"ip":                 IsIP,
	"port":               IsPort,
	"ipv4":               IsIPv4,
	"ipv6":               IsIPv6,
	"dns":                IsDNSName,
	"host":               IsHost,
	"mac":                IsMAC,
	"latitude":           IsLatitude,
	"longitude":          IsLongitude,
	"ssn":                IsSSN,
	"semver":             IsSemver,
	"rfc3339":            IsRFC3339,
	"rfc3339WithoutZone": IsRFC3339WithoutZone,
	"ISO3166Alpha2":      IsISO3166Alpha2,
	"ISO3166Alpha3":      IsISO3166Alpha3,
	"ISO4217":            IsISO4217,
}

TagMap is a map of functions, that can be used as tags for ValidateStruct function.

Functions

func Abs

func Abs(value float64) float64

Abs returns absolute value of number

func BlackList

func BlackList(str, chars string) string

BlackList remove characters that appear in the blacklist.

func ByteLength

func ByteLength(str string, params ...string) bool

ByteLength check string's length

func CamelCaseToUnderscore

func CamelCaseToUnderscore(str string) string

CamelCaseToUnderscore converts from camel case form to underscore separated form. Ex.: MyFunc => my_func

func Contains

func Contains(str, substring string) bool

Contains check if the string contains the substring.

func Count

func Count(array []interface{}, iterator ConditionIterator) int

Count iterates over the slice and apply ConditionIterator to every item. Returns count of items that meets ConditionIterator.

func Each

func Each(array []interface{}, iterator Iterator)

Each iterates over the slice and apply Iterator to every item

func ErrorByField

func ErrorByField(e error, field string) string

ErrorByField returns error for specified field of the struct validated by ValidateStruct or empty string if there are no errors or this field doesn't exists or doesn't have any errors.

func ErrorsByField

func ErrorsByField(e error) map[string]string

ErrorsByField returns map of errors of the struct validated by ValidateStruct or empty map if there are no errors.

func Filter

func Filter(array []interface{}, iterator ConditionIterator) []interface{}

Filter iterates over the slice and apply ConditionIterator to every item. Returns new slice.

func Find

func Find(array []interface{}, iterator ConditionIterator) interface{}

Find iterates over the slice and apply ConditionIterator to every item. Returns first item that meet ConditionIterator or nil otherwise.

func GetLine

func GetLine(s string, index int) (string, error)

GetLine return specified line of multiline string

func GetLines

func GetLines(s string) []string

GetLines split string by "\n" and return array of lines

func HasLowerCase

func HasLowerCase(str string) bool

HasLowerCase check if the string contains at least 1 lowercase. Empty string is valid.

func HasUpperCase

func HasUpperCase(str string) bool

HasUpperCase check if the string contians as least 1 uppercase. Empty string is valid.

func HasWhitespace

func HasWhitespace(str string) bool

HasWhitespace checks if the string contains any whitespace

func HasWhitespaceOnly

func HasWhitespaceOnly(str string) bool

HasWhitespaceOnly checks the string only contains whitespace

func InRange

func InRange(value interface{}, left interface{}, right interface{}) bool

InRange returns true if value lies between left and right border, generic type to handle int, float32 or float64, all types must the same type

func InRangeFloat32

func InRangeFloat32(value, left, right float32) bool

InRange returns true if value lies between left and right border

func InRangeFloat64

func InRangeFloat64(value, left, right float64) bool

InRange returns true if value lies between left and right border

func InRangeInt

func InRangeInt(value, left, right interface{}) bool

InRange returns true if value lies between left and right border

func IsASCII

func IsASCII(str string) bool

IsASCII check if the string contains ASCII chars only. Empty string is valid.

func IsAlpha

func IsAlpha(str string) bool

IsAlpha check if the string contains only letters (a-zA-Z). Empty string is valid.

func IsAlphanumeric

func IsAlphanumeric(str string) bool

IsAlphanumeric check if the string contains only letters and numbers. Empty string is valid.

func IsBase64

func IsBase64(str string) bool

IsBase64 check if a string is base64 encoded.

func IsByteLength

func IsByteLength(str string, min, max int) bool

IsByteLength check if the string's length (in bytes) falls in a range.

func IsCIDR

func IsCIDR(str string) bool

IsCIDR check if the string is an valid CIDR notiation (IPV4 & IPV6)

func IsCreditCard

func IsCreditCard(str string) bool

IsCreditCard check if the string is a credit card.

func IsDNSName

func IsDNSName(str string) bool

IsDNSName will validate the given string as a DNS name

func IsDataURI

func IsDataURI(str string) bool

IsDataURI checks if a string is base64 encoded data URI such as an image

func IsDialString

func IsDialString(str string) bool

IsDialString validates the given string for usage with the various Dial() functions

func IsDivisibleBy

func IsDivisibleBy(str, num string) bool

IsDivisibleBy check if the string is a number that's divisible by another. If second argument is not valid integer or zero, it's return false. Otherwise, if first argument is not valid integer or zero, it's return true (Invalid string converts to zero).

func IsEmail

func IsEmail(str string) bool

IsEmail check if the string is an email.

func IsExistingEmail

func IsExistingEmail(email string) bool

IsExistingEmail check if the string is an email of existing domain

func IsFilePath

func IsFilePath(str string) (bool, int)

IsFilePath check is a string is Win or Unix file path and returns it's type.

func IsFloat

func IsFloat(str string) bool

IsFloat check if the string is a float.

func IsFullWidth

func IsFullWidth(str string) bool

IsFullWidth check if the string contains any full-width chars. Empty string is valid.

func IsHalfWidth

func IsHalfWidth(str string) bool

IsHalfWidth check if the string contains any half-width chars. Empty string is valid.

func IsHash

func IsHash(str string, algorithm string) bool

IsHash checks if a string is a hash of type algorithm. Algorithm is one of ['md4', 'md5', 'sha1', 'sha256', 'sha384', 'sha512', 'ripemd128', 'ripemd160', 'tiger128', 'tiger160', 'tiger192', 'crc32', 'crc32b']

func IsHexadecimal

func IsHexadecimal(str string) bool

IsHexadecimal check if the string is a hexadecimal number.

func IsHexcolor

func IsHexcolor(str string) bool

IsHexcolor check if the string is a hexadecimal color.

func IsHost

func IsHost(str string) bool

IsHost checks if the string is a valid IP (both v4 and v6) or a valid DNS name

func IsIP

func IsIP(str string) bool

IsIP checks if a string is either IP version 4 or 6.

func IsIPv4

func IsIPv4(str string) bool

IsIPv4 check if the string is an IP version 4.

func IsIPv6

func IsIPv6(str string) bool

IsIPv6 check if the string is an IP version 6.

func IsISBN

func IsISBN(str string, version int) bool

IsISBN check if the string is an ISBN (version 10 or 13). If version value is not equal to 10 or 13, it will be check both variants.

func IsISBN10

func IsISBN10(str string) bool

IsISBN10 check if the string is an ISBN version 10.

func IsISBN13

func IsISBN13(str string) bool

IsISBN13 check if the string is an ISBN version 13.

func IsISO3166Alpha2

func IsISO3166Alpha2(str string) bool

IsISO3166Alpha2 checks if a string is valid two-letter country code

func IsISO3166Alpha3

func IsISO3166Alpha3(str string) bool

IsISO3166Alpha3 checks if a string is valid three-letter country code

func IsISO4217

func IsISO4217(str string) bool

IsISO4217 check if string is valid ISO currency code

func IsISO693Alpha2

func IsISO693Alpha2(str string) bool

IsISO693Alpha2 checks if a string is valid two-letter language code

func IsISO693Alpha3b

func IsISO693Alpha3b(str string) bool

IsISO693Alpha3b checks if a string is valid three-letter language code

func IsIn

func IsIn(str string, params ...string) bool

IsIn check if string str is a member of the set of strings params

func IsInt

func IsInt(str string) bool

IsInt check if the string is an integer. Empty string is valid.

func IsJSON

func IsJSON(str string) bool

IsJSON check if the string is valid JSON (note: uses json.Unmarshal).

func IsLatitude

func IsLatitude(str string) bool

IsLatitude check if a string is valid latitude.

func IsLongitude

func IsLongitude(str string) bool

IsLongitude check if a string is valid longitude.

func IsLowerCase

func IsLowerCase(str string) bool

IsLowerCase check if the string is lowercase. Empty string is valid.

func IsMAC

func IsMAC(str string) bool

IsMAC check if a string is valid MAC address. Possible MAC formats: 01:23:45:67:89:ab 01:23:45:67:89:ab:cd:ef 01-23-45-67-89-ab 01-23-45-67-89-ab-cd-ef 0123.4567.89ab 0123.4567.89ab.cdef

func IsMongoID

func IsMongoID(str string) bool

IsMongoID check if the string is a valid hex-encoded representation of a MongoDB ObjectId.

func IsMultibyte

func IsMultibyte(str string) bool

IsMultibyte check if the string contains one or more multibyte chars. Empty string is valid.

func IsNatural

func IsNatural(value float64) bool

IsNatural returns true if value is natural number (positive and whole)

func IsNegative

func IsNegative(value float64) bool

IsNegative returns true if value < 0

func IsNonNegative

func IsNonNegative(value float64) bool

IsNonNegative returns true if value >= 0

func IsNonPositive

func IsNonPositive(value float64) bool

IsNonPositive returns true if value <= 0

func IsNull

func IsNull(str string) bool

IsNull check if the string is null.

func IsNumeric

func IsNumeric(str string) bool

IsNumeric check if the string contains only numbers. Empty string is valid.

func IsPort

func IsPort(str string) bool

IsPort checks if a string represents a valid port

func IsPositive

func IsPositive(value float64) bool

IsPositive returns true if value > 0

func IsPrintableASCII

func IsPrintableASCII(str string) bool

IsPrintableASCII check if the string contains printable ASCII chars only. Empty string is valid.

func IsRFC3339

func IsRFC3339(str string) bool

IsRFC3339 check if string is valid timestamp value according to RFC3339

func IsRFC3339WithoutZone

func IsRFC3339WithoutZone(str string) bool

IsRFC3339WithoutZone check if string is valid timestamp value according to RFC3339 which excludes the timezone.

func IsRGBcolor

func IsRGBcolor(str string) bool

IsRGBcolor check if the string is a valid RGB color in form rgb(RRR, GGG, BBB).

func IsRequestURI

func IsRequestURI(rawurl string) bool

IsRequestURI check if the string rawurl, assuming it was received in an HTTP request, is an absolute URI or an absolute path.

func IsRequestURL

func IsRequestURL(rawurl string) bool

IsRequestURL check if the string rawurl, assuming it was received in an HTTP request, is a valid URL confirm to RFC 3986

func IsRsaPub

func IsRsaPub(str string, params ...string) bool

IsRsaPub check whether string is valid RSA key Alias for IsRsaPublicKey

func IsRsaPublicKey

func IsRsaPublicKey(str string, keylen int) bool

IsRsaPublicKey check if a string is valid public key with provided length

func IsSSN

func IsSSN(str string) bool

IsSSN will validate the given string as a U.S. Social Security Number

func IsSemver

func IsSemver(str string) bool

IsSemver check if string is valid semantic version

func IsTime

func IsTime(str string, format string) bool

IsTime check if string is valid according to given format

func IsURL

func IsURL(str string) bool

IsURL check if the string is an URL.

func IsUTFDigit

func IsUTFDigit(str string) bool

IsUTFDigit check if the string contains only unicode radix-10 decimal digits. Empty string is valid.

func IsUTFLetter

func IsUTFLetter(str string) bool

IsUTFLetter check if the string contains only unicode letter characters. Similar to IsAlpha but for all languages. Empty string is valid.

func IsUTFLetterNumeric

func IsUTFLetterNumeric(str string) bool

IsUTFLetterNumeric check if the string contains only unicode letters and numbers. Empty string is valid.

func IsUTFNumeric

func IsUTFNumeric(str string) bool

IsUTFNumeric check if the string contains only unicode numbers of any kind. Numbers can be 0-9 but also Fractions ¾,Roman Ⅸ and Hangzhou 〩. Empty string is valid.

func IsUUID

func IsUUID(str string) bool

IsUUID check if the string is a UUID (version 3, 4 or 5).

func IsUUIDv3

func IsUUIDv3(str string) bool

IsUUIDv3 check if the string is a UUID version 3.

func IsUUIDv4

func IsUUIDv4(str string) bool

IsUUIDv4 check if the string is a UUID version 4.

func IsUUIDv5

func IsUUIDv5(str string) bool

IsUUIDv5 check if the string is a UUID version 5.

func IsUpperCase

func IsUpperCase(str string) bool

IsUpperCase check if the string is uppercase. Empty string is valid.

func IsVariableWidth

func IsVariableWidth(str string) bool

IsVariableWidth check if the string contains a mixture of full and half-width chars. Empty string is valid.

func IsWhole

func IsWhole(value float64) bool

IsWhole returns true if value is whole number

func LeftTrim

func LeftTrim(str, chars string) string

LeftTrim trim characters from the left-side of the input. If second argument is empty, it's will be remove leading spaces.

func Map

func Map(array []interface{}, iterator ResultIterator) []interface{}

Map iterates over the slice and apply ResultIterator to every item. Returns new slice as a result.

func Matches

func Matches(str, pattern string) bool

Matches check if string matches the pattern (pattern is regular expression) In case of error return false

func NormalizeEmail

func NormalizeEmail(str string) (string, error)

NormalizeEmail canonicalize an email address. The local part of the email address is lowercased for all domains; the hostname is always lowercased and the local part of the email address is always lowercased for hosts that are known to be case-insensitive (currently only GMail). Normalization follows special rules for known providers: currently, GMail addresses have dots removed in the local part and are stripped of tags (e.g. some.one+tag@gmail.com becomes someone@gmail.com) and all @googlemail.com addresses are normalized to @gmail.com.

func PadBoth

func PadBoth(str string, padStr string, padLen int) string

PadBoth pad sides of string if size of string is less then indicated pad length

func PadLeft

func PadLeft(str string, padStr string, padLen int) string

PadLeft pad left side of string if size of string is less then indicated pad length

func PadRight

func PadRight(str string, padStr string, padLen int) string

PadRight pad right side of string if size of string is less then indicated pad length

func PrependPathToErrors

func PrependPathToErrors(err error, path string) error

func Range

func Range(str string, params ...string) bool

Range check string's length

func RemoveTags

func RemoveTags(s string) string

RemoveTags remove all tags from HTML string

func ReplacePattern

func ReplacePattern(str, pattern, replace string) string

ReplacePattern replace regular expression pattern in string

func Reverse

func Reverse(s string) string

Reverse return reversed string

func RightTrim

func RightTrim(str, chars string) string

RightTrim trim characters from the right-side of the input. If second argument is empty, it's will be remove spaces.

func RuneLength

func RuneLength(str string, params ...string) bool

RuneLength check string's length Alias for StringLength

func SafeFileName

func SafeFileName(str string) string

SafeFileName return safe string that can be used in file names

func SetFieldsRequiredByDefault

func SetFieldsRequiredByDefault(value bool)

SetFieldsRequiredByDefault causes validation to fail when struct fields do not include validations or are not explicitly marked as exempt (using `valid:"-"` or `valid:"email,optional"`). This struct definition will fail govalidator.ValidateStruct() (and the field values do not matter):

type exampleStruct struct {
    Name  string ``
    Email string `valid:"email"`

This, however, will only fail when Email is empty or an invalid email address:

type exampleStruct2 struct {
    Name  string `valid:"-"`
    Email string `valid:"email"`

Lastly, this will only fail when Email is an invalid email address but not when it's empty:

type exampleStruct2 struct {
    Name  string `valid:"-"`
    Email string `valid:"email,optional"`

func SetNilPtrAllowedByRequired

func SetNilPtrAllowedByRequired(value bool)

SetNilPtrAllowedByRequired causes validation to pass for nil ptrs when a field is set to required. The validation will still reject ptr fields in their zero value state. Example with this enabled:

type exampleStruct struct {
    Name  *string `valid:"required"`

With `Name` set to "", this will be considered invalid input and will cause a validation error. With `Name` set to nil, this will be considered valid by validation. By default this is disabled.

func Sign

func Sign(value float64) float64

Sign returns signum of number: 1 in case of value > 0, -1 in case of value < 0, 0 otherwise

func StringLength

func StringLength(str string, params ...string) bool

StringLength check string's length (including multi byte strings)

func StringMatches

func StringMatches(s string, params ...string) bool

StringMatches checks if a string matches a given pattern.

func StripLow

func StripLow(str string, keepNewLines bool) string

StripLow remove characters with a numerical value < 32 and 127, mostly control characters. If keep_new_lines is true, newline characters are preserved (\n and \r, hex 0xA and 0xD).

func ToBoolean

func ToBoolean(str string) (bool, error)

ToBoolean convert the input string to a boolean.

func ToFloat

func ToFloat(str string) (float64, error)

ToFloat convert the input string to a float, or 0.0 if the input is not a float.

func ToInt

func ToInt(value interface{}) (res int64, err error)

ToInt convert the input string or any int type to an integer type 64, or 0 if the input is not an integer.

func ToJSON

func ToJSON(obj interface{}) (string, error)

ToJSON convert the input to a valid JSON string

func ToString

func ToString(obj interface{}) string

ToString convert the input to a string.

func Trim

func Trim(str, chars string) string

Trim trim characters from both sides of the input. If second argument is empty, it's will be remove spaces.

func Truncate

func Truncate(str string, length int, ending string) string

Truncate a string to the closest length without breaking words.

func TruncatingErrorf

func TruncatingErrorf(str string, args ...interface{}) error

TruncatingErrorf removes extra args from fmt.Errorf if not formatted in the str object

func UnderscoreToCamelCase

func UnderscoreToCamelCase(s string) string

UnderscoreToCamelCase converts from underscore separated form to camel case form. Ex.: my_func => MyFunc

func ValidateStruct

func ValidateStruct(s interface{}) (bool, error)

ValidateStruct use tags for fields. result will be equal to `false` if there are any errors.

func WhiteList

func WhiteList(str, chars string) string

WhiteList remove characters that do not appear in the whitelist.

Types

type ConditionIterator

type ConditionIterator func(interface{}, int) bool

ConditionIterator is the function that accepts element of slice/array and its index and returns boolean

type CustomTypeValidator

type CustomTypeValidator func(i interface{}, o interface{}) bool

CustomTypeValidator is a wrapper for validator functions that returns bool and accepts any type. The second parameter should be the context (in the case of validating a struct: the whole object being validated).

type Error

type Error struct {
	Name                     string
	Err                      error
	CustomErrorMessageExists bool

	// Validator indicates the name of the validator that failed
	Validator string
	Path      []string
}

Error encapsulates a name, an error and whether there's a custom error message or not.

func (Error) Error

func (e Error) Error() string

type Errors

type Errors []error

Errors is an array of multiple errors and conforms to the error interface.

func (Errors) Error

func (es Errors) Error() string

func (Errors) Errors

func (es Errors) Errors() []error

Errors returns itself.

type ISO3166Entry

type ISO3166Entry struct {
	EnglishShortName string
	FrenchShortName  string
	Alpha2Code       string
	Alpha3Code       string
	Numeric          string
}

ISO3166Entry stores country codes

type ISO693Entry

type ISO693Entry struct {
	Alpha3bCode string
	Alpha2Code  string
	English     string
}

ISO693Entry stores ISO language codes

type Iterator

type Iterator func(interface{}, int)

Iterator is the function that accepts element of slice/array and its index

type ParamValidator

type ParamValidator func(str string, params ...string) bool

ParamValidator is a wrapper for validator functions that accepts additional parameters.

type ResultIterator

type ResultIterator func(interface{}, int) interface{}

ResultIterator is the function that accepts element of slice/array and its index and returns any result

type UnsupportedTypeError

type UnsupportedTypeError struct {
	Type reflect.Type
}

UnsupportedTypeError is a wrapper for reflect.Type

func (*UnsupportedTypeError) Error

func (e *UnsupportedTypeError) Error() string

Error returns string equivalent for reflect.Type

type Validator

type Validator func(str string) bool

Validator is a wrapper for a validator function that returns bool and accepts string.

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