71 lines
1.3 KiB
Go
71 lines
1.3 KiB
Go
package command
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
const (
|
|
FlagTitle = "title"
|
|
FlagOn = "on"
|
|
FlagAt = "at"
|
|
FlagFor = "for"
|
|
FlagRecStart = "rec-start"
|
|
FlagRecPeriod = "rec-period"
|
|
FlagRecCount = "rec-count"
|
|
)
|
|
|
|
type Command interface {
|
|
Execute([]string, map[string]string) error
|
|
}
|
|
|
|
type CLI struct {
|
|
Commands []Command
|
|
}
|
|
|
|
func (cli *CLI) Run(args []string) error {
|
|
main, flags, err := ParseFlags(args)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, c := range cli.Commands {
|
|
err := c.Execute(main, flags)
|
|
switch {
|
|
case errors.Is(err, ErrWrongCommand):
|
|
continue
|
|
case err != nil:
|
|
return err
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
|
|
return fmt.Errorf("could not find matching command")
|
|
}
|
|
|
|
func ParseFlags(args []string) ([]string, map[string]string, error) {
|
|
flags := make(map[string]string)
|
|
main := make([]string, 0)
|
|
var inMain bool
|
|
for i := 0; i < len(args); i++ {
|
|
if strings.HasPrefix(args[i], "-") {
|
|
inMain = false
|
|
if i+1 >= len(args) {
|
|
return nil, nil, fmt.Errorf("flag wihout value")
|
|
}
|
|
flags[strings.TrimPrefix(args[i], "-")] = args[i+1]
|
|
i++
|
|
continue
|
|
}
|
|
|
|
if !inMain && len(main) > 0 {
|
|
return nil, nil, fmt.Errorf("two mains")
|
|
}
|
|
inMain = true
|
|
main = append(main, args[i])
|
|
}
|
|
|
|
return main, flags, nil
|
|
}
|