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package transformers
import (
"image"
"imageboard/config"
"imageboard/models"
"imageboard/utils/format"
"imageboard/utils/validators"
"strings"
)
func TransformImageToVariant(img image.Image, variant config.ImageSizeType) (models.ImageSize, image.Image, error) {
variantSizeMap := map[config.ImageSizeType]int{
config.ImageSizeTypeIcon: 64,
config.ImageSizeTypeThumbnail: 256,
config.ImageSizeTypeSmall: 512,
config.ImageSizeTypeMedium: 1024,
config.ImageSizeTypeLarge: 2048,
config.ImageSizeTypeOriginal: 0, // Original size, no resizing
}
maxWidth := variantSizeMap[variant]
if maxWidth > 0 {
img = ResizeImage(img, maxWidth)
}
fileSize := format.GetImageFileSize(img)
return models.ImageSize{
SizeType: variant,
Width: img.Bounds().Dx(),
Height: img.Bounds().Dy(),
FileSize: fileSize,
}, img, nil
}
func ResizeImage(img image.Image, maxWidth int) image.Image {
if maxWidth <= 0 || img.Bounds().Dx() <= maxWidth {
return img
}
ratio := float64(maxWidth) / float64(img.Bounds().Dx())
newWidth := int(float64(img.Bounds().Dx()) * ratio)
newHeight := int(float64(img.Bounds().Dy()) * ratio)
newImg := image.NewRGBA(image.Rect(0, 0, newWidth, newHeight))
for y := 0; y < newHeight; y++ {
for x := 0; x < newWidth; x++ {
srcX := int(float64(x) / ratio)
srcY := int(float64(y) / ratio)
if srcX < img.Bounds().Dx() && srcY < img.Bounds().Dy() {
newImg.Set(x, y, img.At(srcX, srcY))
}
}
}
return newImg
}
func CreateUniqueFileName(sourceURLOrOriginalName, imageFormat string) string {
fileName := sourceURLOrOriginalName
if validators.IsValidURL(sourceURLOrOriginalName) {
parts := strings.Split(sourceURLOrOriginalName, "/")
fileName = parts[len(parts)-1]
}
currentTime := format.GetCurrentTimeAsTimestamp()
fileNameWithoutExtension := format.RemoveExtension(fileName)
fileName = GenerateTokenFromString(fileNameWithoutExtension + "_" + format.Int64ToString(currentTime))
if len(fileName) > 32 {
mid := len(fileName) / 2
fileName = fileName[mid-16 : mid+16]
}
return fileName + "." + imageFormat
}
func ConvertStringRatingToType(rating string) (config.Rating, error) {
switch rating {
case "safe":
return config.RatingSafe, nil
case "questionable":
return config.RatingQuestionable, nil
case "sensitive":
return config.RatingSensitive, nil
case "explicit":
return config.RatingExplicit, nil
default:
return config.RatingSafe, nil
}
}
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