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package account
import (
"errors"
"fmt"
"strconv"
"strings"
"git.sr.ht/~rjarry/aerc/app"
"git.sr.ht/~rjarry/aerc/lib/ui"
)
type NextPrevMsg struct{}
func init() {
register(NextPrevMsg{})
}
func (NextPrevMsg) Aliases() []string {
return []string{"next", "next-message", "prev", "prev-message"}
}
func (NextPrevMsg) Complete(args []string) []string {
return nil
}
func (NextPrevMsg) Execute(args []string) error {
n, pct, err := ParseNextPrevMessage(args)
if err != nil {
return err
}
acct := app.SelectedAccount()
if acct == nil {
return errors.New("No account selected")
}
return ExecuteNextPrevMessage(args, acct, pct, n)
}
func ParseNextPrevMessage(args []string) (int, bool, error) {
if len(args) > 2 {
return 0, false, nextPrevMessageUsage(args[0])
}
var (
n int = 1
err error
pct bool
)
if len(args) > 1 {
if strings.HasSuffix(args[1], "%") {
pct = true
args[1] = args[1][:len(args[1])-1]
}
n, err = strconv.Atoi(args[1])
if err != nil {
return 0, false, nextPrevMessageUsage(args[0])
}
}
return n, pct, nil
}
func ExecuteNextPrevMessage(args []string, acct *app.AccountView, pct bool, n int) error {
if pct {
n = int(float64(acct.Messages().Height()) * (float64(n) / 100.0))
}
if args[0] == "prev-message" || args[0] == "prev" {
store := acct.Store()
if store != nil {
store.NextPrev(-n)
ui.Invalidate()
}
} else {
store := acct.Store()
if store != nil {
store.NextPrev(n)
ui.Invalidate()
}
}
return nil
}
func nextPrevMessageUsage(cmd string) error {
return fmt.Errorf("Usage: %s [<n>[%%]]", cmd)
}
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