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filter.go
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filter.go
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package chlog
import (
"strings"
"github.com/gookit/goutil/strutil"
)
// ItemFilter interface
type ItemFilter interface {
// Handle filtering
Handle(li *LogItem) bool
}
// ItemFilterFunc define. return false to filter item.
// type LineFilterFunc func(line string) bool
type ItemFilterFunc func(li *LogItem) bool
// Handle filtering
func (f ItemFilterFunc) Handle(li *LogItem) bool {
return f(li)
}
// built in filters
const (
FilterMsgLen = "msg_len"
FilterWordsLen = "words_len"
FilterKeyword = "keyword"
FilterKeywords = "keywords"
)
// MsgLenFilter handler
func MsgLenFilter(minLen int) ItemFilterFunc {
return func(li *LogItem) bool {
return len(li.Msg) > minLen
}
}
// WordsLenFilter handler
func WordsLenFilter(minLen int) ItemFilterFunc {
return func(li *LogItem) bool {
return len(strutil.Split(li.Msg, " ")) > minLen
}
}
// KeywordFilter filter log item by keyword
func KeywordFilter(kw string, exclude bool) ItemFilterFunc {
return func(li *LogItem) bool {
has := strings.Contains(li.Msg, kw)
if exclude {
return !has
}
return has
}
}
// KeywordsFilter filter log item by keywords
func KeywordsFilter(kws []string, exclude bool) ItemFilterFunc {
return func(li *LogItem) bool {
for _, kw := range kws {
if strings.Contains(li.Msg, kw) {
return !exclude
}
}
return exclude
}
}