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|
package args
import (
"strconv"
"strings"
)
const (
portLowest = 1
portHighest = 65536
)
// HasSingleFlagArgument checks whether selected flag was used once and has requested argument.
func HasSingleFlagArgument(flag string, argument string, params []string) bool {
found := filterFlags(params, flag)
if len(found) != 1 {
return false
}
_, value := splitKV(found[0], "=")
if value != argument {
return false
}
return true
}
// HasFlagArgumentIncluded checks whether selected flag includes requested argument.
func HasFlagArgumentIncluded(flag string, argument string, params []string) bool {
found := filterFlags(params, flag)
if len(found) != 1 {
return false
}
_, values := splitKV(found[0], "=")
for _, v := range strings.Split(values, ",") {
if v == argument {
return true
}
}
return false
}
// HasSingleFlagNonemptyArgument checks whether selected flag was used once and has non-empty argument.
func HasSingleFlagNonemptyArgument(flag string, params []string) bool {
found := filterFlags(params, flag)
if len(found) != 1 {
return false
}
_, value := splitKV(found[0], "=")
if value == "" {
return false
}
return true
}
// HasSingleFlagValidPort checks whether selected flag has valid port as an argument in given command.
func HasSingleFlagValidPort(flag string, params []string) bool {
found := filterFlags(params, flag)
if len(found) != 1 {
return false
}
_, value := splitKV(found[0], "=")
port, err := strconv.Atoi(value) // what about empty parameter?
if err != nil {
return false
}
if port < portLowest || port > portHighest {
return false
}
return true
}
// HasSingleFlagValidTimeout checks whether selected flag has valid timeout as an argument in given command.
func HasSingleFlagValidTimeout(flag string, min int, max int, params []string) bool {
found := filterFlags(params, flag)
if len(found) != 1 {
return false
}
_, value := splitKV(found[0], "=")
timeout, err := strconv.Atoi(value) // what about empty parameter?
if err != nil {
return false
}
if timeout < min || timeout > max {
return false
}
return true
}
// HasSingleFlagRecommendedNumericArgument checks whether selected flag was used once and has
// an argument that is greater or equal than the recommended value for given command.
func HasSingleFlagRecommendedNumericArgument(flag string, recommendation int, params []string) bool {
found := filterFlags(params, flag)
if len(found) != 1 {
return false
}
_, value := splitKV(found[0], "=")
arg, err := strconv.Atoi(value) // what about empty parameter?
if err != nil {
return false
}
if arg < recommendation {
return false
}
return true
}
// filterFlags returns all occurrences of selected flag.
func filterFlags(strs []string, flag string) []string {
var filtered []string
for _, str := range strs {
if strings.HasPrefix(str, flag) {
filtered = append(filtered, str)
}
}
return filtered
}
// splitKV splits key and value (after first occurrence of separator).
func splitKV(s, sep string) (string, string) {
ret := strings.SplitN(s, sep, 2)
return ret[0], ret[1]
}
|
