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// Eko: A terminal-native social media platform
// Copyright (C) 2025 Kyren223
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package choicepopup
import (
"strings"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
"github.com/kyren223/eko/pkg/assert"
)
type Model struct {
Width int
Height int
Cycle bool
content string
choices []string
index int
leftCount int
SelectedStyle lipgloss.Style
UnselectedStyle lipgloss.Style
ChoicesStyle lipgloss.Style
Style lipgloss.Style
}
func New(width, height int) Model {
return Model{
Width: width,
Height: height,
}
}
func (m Model) Init() tea.Cmd {
return nil
}
func (m Model) View() string {
var leftChoices []string
var rightChoices []string
for i, choice := range m.choices {
if i == m.index {
choice = m.SelectedStyle.Render(choice)
} else {
choice = m.UnselectedStyle.Render(choice)
}
if i < m.leftCount {
leftChoices = append(leftChoices, choice)
} else {
rightChoices = append(rightChoices, choice)
}
}
left := lipgloss.JoinHorizontal(lipgloss.Center, leftChoices...)
right := lipgloss.JoinHorizontal(lipgloss.Center, rightChoices...)
leftWidth := lipgloss.Width(left)
rightWidth := lipgloss.Width(right)
paddingSize := m.Width - leftWidth - rightWidth
assert.Assert(paddingSize >= 0, "there should be enough space for all choices", "remaining", paddingSize)
padding := lipgloss.NewStyle().
Background(m.Style.GetBackground()).
Render(strings.Repeat(" ", paddingSize))
choices := lipgloss.JoinHorizontal(lipgloss.Center, left, padding, right)
styledChoices := m.ChoicesStyle.MaxWidth(m.Width).MaxHeight(m.Height).Render(choices)
maxContentHeight := m.Height - lipgloss.Height(styledChoices)
content := lipgloss.NewStyle().MaxWidth(m.Width).MaxHeight(maxContentHeight).
Render(m.content)
popup := lipgloss.JoinVertical(lipgloss.Left, content, styledChoices)
return m.Style.Render(popup)
}
func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
return m, nil
}
func (m *Model) SetContent(content string) {
m.content = content
}
func (m *Model) SetChoices(leftChoices, rightChoices []string) {
assert.Assert(len(leftChoices)+len(rightChoices) != 0, "choices must have at least 1 element")
m.index = 0
m.leftCount = len(leftChoices)
m.choices = nil
m.choices = append(m.choices, leftChoices...)
m.choices = append(m.choices, rightChoices...)
}
func (m *Model) ScrollLeft() {
if m.index == 0 {
if m.Cycle {
m.index = len(m.choices) - 1
}
return
}
m.index--
}
func (m *Model) ScrollRight() {
if m.index == len(m.choices)-1 {
if m.Cycle {
m.index = 0
}
return
}
m.index++
}
func (m Model) Select() (index int, choice string) {
return m.index, m.choices[m.index]
}
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