Commit `ec5a5f9093`

ec5a5f9093810bc596131924ad0d80a20b53bc57

Verified · cmc

cmc <hello@cleberg.net> · 2026-09-25 23:15 UTC

Add format registry

Layout: unified · split

.gitignore added +4

go.mod added +3

		@@ -0,0 +1,3 @@
	1	module gitbay.org/cmc/gallery
	2
	3	go 1.27.1

internal/format/format.go added +61

		@@ -0,0 +1,61 @@
	1	// Package format describes the file types the gallery can show.
	2	package format
	3
	4	import (
	5	"io"
	6	"path/filepath"
	7	"strings"
	8	"time"
	9	)
	10
	11	type Kind int
	12
	13	const (
	14	KindImage Kind = iota
	15	)
	16
	17	// Meta holds display metadata. Width and Height are after EXIF orientation.
	18	type Meta struct {
	19	Width, Height int
	20	Taken time.Time
	21	Camera, Lens string
	22	Aperture string
	23	Shutter string
	24	ISO int
	25	}
	26
	27	type Format interface {
	28	Name() string
	29	Match(path string) bool
	30	Metadata(path string) (Meta, error)
	31	Resize(src string, width int, dst io.Writer) error
	32	Kind() Kind
	33	}
	34
	35	// Registry resolves a path to the first registered Format that matches it.
	36	type Registry struct {
	37	formats []Format
	38	}
	39
	40	func (r *Registry) Register(f Format) {
	41	r.formats = append(r.formats, f)
	42	}
	43
	44	func (r *Registry) Lookup(path string) Format {
	45	for _, f := range r.formats {
	46	if f.Match(path) {
	47	return f
	48	}
	49	}
	50	return nil
	51	}
	52
	53	func hasExt(path string, exts []string) bool {
	54	ext := strings.ToLower(filepath.Ext(path))
	55	for _, e := range exts {
	56	if ext == e {
	57	return true
	58	}
	59	}
	60	return false
	61	}

internal/format/format_test.go added +44

		@@ -0,0 +1,44 @@
	1	package format
	2
	3	import (
	4	"io"
	5	"path/filepath"
	6	"strings"
	7	"testing"
	8	)
	9
	10	type fake struct{ name, ext string }
	11
	12	func (f fake) Name() string { return f.name }
	13	func (f fake) Match(p string) bool { return strings.EqualFold(filepath.Ext(p), f.ext) }
	14	func (fake) Metadata(string) (Meta, error) { return Meta{}, nil }
	15	func (fake) Resize(string, int, io.Writer) error { return nil }
	16	func (fake) Kind() Kind { return KindImage }
	17
	18	func TestRegistryFirstMatchWins(t *testing.T) {
	19	var r Registry
	20	r.Register(fake{"a", ".jpg"})
	21	r.Register(fake{"b", ".jpg"})
	22	r.Register(fake{"c", ".png"})
	23
	24	if got := r.Lookup("x/IMG.JPG"); got == nil \|\| got.Name() != "a" {
	25	t.Fatalf("jpg: got %v, want a", got)
	26	}
	27	if got := r.Lookup("x.png"); got == nil \|\| got.Name() != "c" {
	28	t.Fatalf("png: got %v, want c", got)
	29	}
	30	if got := r.Lookup("notes.txt"); got != nil {
	31	t.Fatalf("txt: got %v, want nil", got)
	32	}
	33	}
	34
	35	func TestHasExt(t *testing.T) {
	36	exts := []string{".jpg", ".jpeg"}
	37	for p, want := range map[string]bool{
	38	"a.jpg": true, "a.JPEG": true, "a.png": false, "jpg": false, "a.jpg.txt": false,
	39	} {
	40	if got := hasExt(p, exts); got != want {
	41	t.Errorf("hasExt(%q) = %v, want %v", p, got, want)
	42	}
	43	}
	44	}

Commit ec5a5f9093