/
truncatewords.go
59 lines (51 loc) · 1.22 KB
/
truncatewords.go
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package filters
import (
"github.com/get3w/get3w/engines/liquid/core"
)
var (
defaultTruncateWordsLimit = &core.StaticIntValue{15}
defaultTruncateWords = (&TruncateWordsFilter{defaultTruncateWordsLimit, defaultTruncateAppend}).Truncate
)
// Creates an truncatewords filter
func TruncateWordsFactory(parameters []core.Value) core.Filter {
switch len(parameters) {
case 0:
return defaultTruncateWords
case 1:
return (&TruncateWordsFilter{parameters[0], defaultTruncateAppend}).Truncate
default:
return (&TruncateWordsFilter{parameters[0], parameters[1]}).Truncate
}
}
type TruncateWordsFilter struct {
limit core.Value
append core.Value
}
func (t *TruncateWordsFilter) Truncate(input interface{}, data map[string]interface{}) interface{} {
length, ok := core.ToInt(t.limit.Resolve(data))
if ok == false {
return input
}
var value string
switch typed := input.(type) {
case string:
value = typed
default:
value = core.ToString(typed)
}
i := 2
found := 0
l := len(value)
for ; i < l; i++ {
if value[i] == ' ' && value[i-1] != ' ' && value[i-2] != ' ' {
found++
if found == length {
break
}
}
}
if i == l {
return input
}
return value[:i] + core.ToString(t.append.Resolve(data))
}