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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
}
|
