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// SPDX-License-Identifier: GPL-3.0-or-later
package matcher
import (
"strings"
)
type (
simplePatternTerm struct {
matcher Matcher
positive bool
}
// simplePatternsMatcher patterns.
simplePatternsMatcher []simplePatternTerm
)
// NewSimplePatternsMatcher creates new simple patterns. It returns error in case one of patterns has bad syntax.
func NewSimplePatternsMatcher(expr string) (Matcher, error) {
var ps simplePatternsMatcher
for _, pattern := range strings.Fields(expr) {
if err := ps.add(pattern); err != nil {
return nil, err
}
}
if len(ps) == 0 {
return FALSE(), nil
}
return ps, nil
}
func (m *simplePatternsMatcher) add(term string) error {
p := simplePatternTerm{}
if term[0] == '!' {
p.positive = false
term = term[1:]
} else {
p.positive = true
}
matcher, err := NewGlobMatcher(term)
if err != nil {
return err
}
p.matcher = matcher
*m = append(*m, p)
return nil
}
func (m simplePatternsMatcher) Match(b []byte) bool {
return m.MatchString(string(b))
}
// MatchString matches.
func (m simplePatternsMatcher) MatchString(line string) bool {
for _, p := range m {
if p.matcher.MatchString(line) {
return p.positive
}
}
return false
}
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