59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
|
package funcmap
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"html/template"
|
||
|
|
"reflect"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"github.com/Masterminds/sprig"
|
||
|
|
"github.com/labstack/gommon/random"
|
||
|
|
)
|
||
|
|
|
||
|
|
// CacheKey stores a random string used as a cache key for static files
|
||
|
|
var CacheKey = random.String(10)
|
||
|
|
|
||
|
|
func GetFuncMap() template.FuncMap {
|
||
|
|
// See http://masterminds.github.io/sprig/ for available funcs
|
||
|
|
funcMap := sprig.FuncMap()
|
||
|
|
|
||
|
|
// Provide a list of custom functions
|
||
|
|
f := template.FuncMap{
|
||
|
|
"hasField": HasField,
|
||
|
|
"file": File,
|
||
|
|
"link": Link,
|
||
|
|
}
|
||
|
|
|
||
|
|
for k, v := range f {
|
||
|
|
funcMap[k] = v
|
||
|
|
}
|
||
|
|
|
||
|
|
return funcMap
|
||
|
|
}
|
||
|
|
|
||
|
|
// HasField checks if an interface contains a given field
|
||
|
|
func HasField(v interface{}, name string) bool {
|
||
|
|
rv := reflect.ValueOf(v)
|
||
|
|
if rv.Kind() == reflect.Ptr {
|
||
|
|
rv = rv.Elem()
|
||
|
|
}
|
||
|
|
if rv.Kind() != reflect.Struct {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
return rv.FieldByName(name).IsValid()
|
||
|
|
}
|
||
|
|
|
||
|
|
// File appends a cache key to a given filepath so it can remain cached until the app is restarted
|
||
|
|
func File(filepath string) string {
|
||
|
|
return fmt.Sprintf("%s?v=%s", filepath, CacheKey)
|
||
|
|
}
|
||
|
|
|
||
|
|
func Link(url, text, currentPath string, classes ...string) template.HTML {
|
||
|
|
if currentPath == url {
|
||
|
|
classes = append(classes, "active")
|
||
|
|
}
|
||
|
|
|
||
|
|
html := fmt.Sprintf(`<a class="%s" href="%s">%s</a>`, strings.Join(classes, " "), url, text)
|
||
|
|
return template.HTML(html)
|
||
|
|
}
|