-
Notifications
You must be signed in to change notification settings - Fork 13
/
avatar.go
71 lines (64 loc) · 1.94 KB
/
avatar.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
package plugins
import (
"bytes"
"fmt"
"hash/crc32"
"strings"
"text/template"
"github.com/osteele/gojekyll/tags"
"github.com/osteele/liquid"
"github.com/osteele/liquid/render"
)
func init() {
register("jekyll-avatar", jekyllAvatarPlugin{})
}
type jekyllAvatarPlugin struct{ plugin }
func (p jekyllAvatarPlugin) ConfigureTemplateEngine(e *liquid.Engine) error {
e.RegisterTag("avatar", avatarTag)
return nil
}
var avatarTemplate = template.Must(template.New("avatar").Parse(strings.TrimSpace(`
<img class="avatar avatar-small" src="https://{{.Subdomain}}.githubusercontent.com/{{.User}}?v=3&s={{.Size}}" alt="{{.User}}" srcset="https://{{.Subdomain}}.githubusercontent.com/{{.User}}?v=3&s={{.Size}} 1x, https://{{.Subdomain}}.githubusercontent.com/{{.User}}?v=3&s=80 2x, https://{{.Subdomain}}.githubusercontent.com/{{.User}}?v=3&s=120 3x, https://{{.Subdomain}}.githubusercontent.com/{{.User}}?v=3&s=160 4x" width="{{.Size}}" height="{{.Size}}" data-proofer-ignore="true" />
`)))
func avatarTag(ctx render.Context) (string, error) {
var (
user string
size interface{} = 40
)
argsline, err := ctx.ExpandTagArg()
if err != nil {
return "", err
}
args, err := tags.ParseArgs(argsline)
if err != nil {
return "", err
}
if len(args.Args) > 0 {
user = args.Args[0]
}
options, err := args.EvalOptions(ctx)
if err != nil {
return "", err
}
for name, value := range options {
switch name {
case "user":
user = fmt.Sprint(value)
case "size":
size = value
default:
return "", fmt.Errorf("unknown avatar argument: %s", name)
}
}
if user == "" {
return "", fmt.Errorf("parse error in avatar tag parameters %s", argsline)
}
n := crc32.Checksum([]byte(fmt.Sprintf("%s:%d", user, size)), crc32.IEEETable) % 4
s := struct {
User, Subdomain string
Size interface{}
}{user, fmt.Sprintf("avatar%d", n), size}
buf := new(bytes.Buffer)
err = avatarTemplate.Execute(buf, s)
return buf.String(), err
}