package commands import ( "errors" "strings" "github.com/google/shlex" "git.sr.ht/~sircmpwn/aerc/widgets" ) type Command interface { Aliases() []string Execute(*widgets.Aerc, []string) error Complete(*widgets.Aerc, []string) []string } type Commands map[string]Command func NewCommands() *Commands { cmds := Commands(make(map[string]Command)) return &cmds } func (cmds *Commands) dict() map[string]Command { return map[string]Command(*cmds) } func (cmds *Commands) Names() []string { names := make([]string, 0) for k := range cmds.dict() { names = append(names, k) } return names } func (cmds *Commands) Register(cmd Command) { // TODO enforce unique aliases, until then, duplicate each if len(cmd.Aliases()) < 1 { return } for _, alias := range cmd.Aliases() { cmds.dict()[alias] = cmd } } type NoSuchCommand string func (err NoSuchCommand) Error() string { return "Unknown command " + string(err) } type CommandSource interface { Commands() *Commands } func (cmds *Commands) ExecuteCommand(aerc *widgets.Aerc, cmd string) error { args, err := shlex.Split(cmd) if err != nil { return err } if len(args) == 0 { return errors.New("Expected a command.") } if cmd, ok := cmds.dict()[args[0]]; ok { return cmd.Execute(aerc, args) } return NoSuchCommand(args[0]) } func (cmds *Commands) GetCompletions(aerc *widgets.Aerc, cmd string) []string { args, err := shlex.Split(cmd) if err != nil { return nil } if len(args) == 0 { return nil } if len(args) > 1 { if cmd, ok := cmds.dict()[args[0]]; ok { completions := cmd.Complete(aerc, args[1:]) if completions != nil && len(completions) == 0 { return nil } options := make([]string, 0) for _, option := range completions { options = append(options, args[0]+" "+option) } return options } return nil } names := cmds.Names() options := make([]string, 0) for _, name := range names { if strings.HasPrefix(name, args[0]) { options = append(options, name) } } if len(options) > 0 { return options } return nil }