Refactor IP parsing to use appendIfNotExcluded for exclusion validation and error handling

parser/text.go

@@ -146,7 +146,11 @@ func (p *textParser) Parse(body io.Reader, validator IPValidator, limit uint) (I
 			continue
 		}
 
-		ips = append(ips, ip)
+		var err error
+		ips, err = appendIfNotExcluded(ip, ips, validator)
+		if err != nil {
+			return nil, err
+		}
 		if limit > 0 && uint(len(ips)) >= limit {
 			break
 		}
@@ -186,9 +190,15 @@ func (p *textParser) ParseIPsByVersion(body io.Reader, validator IPValidator, li
 		}
 
 		if ipVersion == IPVersion4 {
-			ipV4 = append(ipV4, ip)
+			ipV4, err = appendIfNotExcluded(ip, ipV4, validator)
+			if err != nil {
+				return nil, nil, err
+			}
 		} else if ipVersion == IPVersion6 {
-			ipV6 = append(ipV6, ip)
+			ipV6, err = appendIfNotExcluded(ip, ipV6, validator)
+			if err != nil {
+				return nil, nil, err
+			}
 		} else {
 			continue
 		}