avatar

Documentation

Index

• Constants
• func HashAvatar(uniqueID int64, data []byte) string
• func Prepare(data []byte) (*image.Image, error)
• func RandomImage(data []byte) (image.Image, error)
• func RandomImageSize(size int, data []byte) (image.Image, error)

Constants

const AvatarSize = 290

AvatarSize returns avatar's size

Functions

func HashAvatar

func HashAvatar(uniqueID int64, data []byte) string

HashAvatar will generate a unique string, which ensures that when there's a different unique ID while the data is the same, it will generate a different output. It will generate the output according to: HEX(HASH(uniqueID || - || data)) The hash being used is SHA256. The sole purpose of the unique ID is to generate a distinct hash Such that two unique IDs with the same data will have a different hash output. The "-" byte is important to ensure that data cannot be modified such that the first byte is a number, which could lead to a "collision" with the hash of another unique ID.

func Prepare

func Prepare(data []byte) (*image.Image, error)

Prepare accepts a byte slice as input, validates it contains an image of an acceptable format, and crops and resizes it appropriately.

func RandomImage

func RandomImage(data []byte) (image.Image, error)

RandomImage generates and returns a random avatar image unique to input data in default size (height and width).

func RandomImageSize

func RandomImageSize(size int, data []byte) (image.Image, error)

RandomImageSize generates and returns a random avatar image unique to input data in custom size (height and width).