/
thumb.go
79 lines (61 loc) · 1.58 KB
/
thumb.go
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package main
import (
"errors"
"fmt"
"path"
"regexp"
"github.com/quirkey/magick"
)
type Thumb struct {
Path string
Dir string
Name string
Ext string
Geometry Geometry
MainPath string
}
var regexpFileSize = regexp.MustCompile(`([^/]+)\-([^\.]+)?.\w+$`)
func (thumb Thumb) MainFullPath() string {
return path.Join(PublicPath(), thumb.MainPath)
}
func (thumb Thumb) FullPath() string {
return path.Join(PublicPath(), thumb.Path)
}
func (thumb Thumb) Generate() (*magick.MagickImage, error) {
if g := thumb.Geometry.String(); !IsValidGeometry(g) {
return nil, ErrorGeometryNotAllowed{g}
}
sourcePath := thumb.MainFullPath()
log("Generating from %s", sourcePath)
image, err := magick.NewFromFile(sourcePath)
if err != nil {
return image, err
}
err = image.Resize(thumb.Geometry.String())
return image, err
}
func ParseThumbName(filePath string) (name string, geometry Geometry, err error) {
fileName := path.Base(filePath)
if matches := regexpFileSize.FindAllStringSubmatch(fileName, -1); len(matches) > 0 {
name = matches[0][1]
geometry, err = ParseGeometry(matches[0][2])
return
}
err = errors.New(fmt.Sprintf("Bad filename %s", filePath))
return
}
func ThumbFromPath(filePath string) (*Thumb, error) {
thumb := &Thumb{
Path: filePath,
}
name, geometry, err := ParseThumbName(filePath)
if err != nil {
return thumb, err
}
thumb.Geometry = geometry
thumb.Dir = path.Dir(filePath)
thumb.Name = name
thumb.Ext = path.Ext(filePath)
thumb.MainPath = path.Join(thumb.Dir, fmt.Sprintf("%s%s", thumb.Name, thumb.Ext))
return thumb, nil
}