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Merge pull request #12 from bulletmys/keyboard-improvements
Keyboard improvements
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| package botgolang | ||
|
|
||
| import ( | ||
| "fmt" | ||
| ) | ||
|
|
||
| // Keyboard represents an inline keyboard markup | ||
| // Call the NewKeyboard() func to get a keyboard instance | ||
| type Keyboard struct { | ||
| Rows [][]Button | ||
| } | ||
|
|
||
| // NewKeyboard returns a new keyboard instance | ||
| func NewKeyboard() Keyboard { | ||
| return Keyboard{ | ||
| Rows: make([][]Button, 0), | ||
| } | ||
| } | ||
|
|
||
| // AddRows adds a row to the keyboard | ||
| func (k *Keyboard) AddRow(row ...Button) { | ||
| k.Rows = append(k.Rows, row) | ||
| } | ||
|
|
||
| // AddButton adds a button to the end of the row | ||
| func (k *Keyboard) AddButton(rowIndex int, button Button) error { | ||
| if ok := k.checkRow(rowIndex); !ok { | ||
| return fmt.Errorf("no such row: %d", rowIndex) | ||
| } | ||
|
|
||
| k.Rows[rowIndex] = append(k.Rows[rowIndex], button) | ||
| return nil | ||
| } | ||
|
|
||
| // DeleteRow removes the row from the keyboard | ||
| func (k *Keyboard) DeleteRow(index int) error { | ||
| if ok := k.checkRow(index); !ok { | ||
| return fmt.Errorf("no such row: %d", index) | ||
| } | ||
|
|
||
| k.Rows = append(k.Rows[:index], k.Rows[index+1:]...) | ||
| return nil | ||
| } | ||
|
|
||
| // DeleteButton removes the button from the row. | ||
| // Note - at least one button should remain in a row, | ||
| // if you want to delete all buttons, use the DeleteRow function | ||
| func (k *Keyboard) DeleteButton(rowIndex, buttonIndex int) error { | ||
| if ok := k.checkButton(rowIndex, buttonIndex); !ok { | ||
| return fmt.Errorf("no button at index %d or row %d", buttonIndex, rowIndex) | ||
| } | ||
|
|
||
| if k.RowSize(rowIndex) < 2 { | ||
| return fmt.Errorf("can't delete button: at least one should remain in a row") | ||
| } | ||
|
|
||
| row := &k.Rows[rowIndex] | ||
| *row = append((*row)[:buttonIndex], (*row)[buttonIndex+1:]...) | ||
| return nil | ||
| } | ||
|
|
||
| // ChangeButton changes the button to a new one at the specified position | ||
| func (k *Keyboard) ChangeButton(rowIndex, buttonIndex int, newButton Button) error { | ||
| if ok := k.checkButton(rowIndex, buttonIndex); !ok { | ||
| return fmt.Errorf("no button at index %d or row %d", buttonIndex, rowIndex) | ||
| } | ||
|
|
||
| k.Rows[rowIndex][buttonIndex] = newButton | ||
| return nil | ||
| } | ||
|
|
||
| // SwapRows swaps two rows in keyboard | ||
| func (k *Keyboard) SwapRows(first, second int) error { | ||
| if ok := k.checkRow(first); !ok { | ||
| return fmt.Errorf("no such index (first): %d", first) | ||
| } | ||
| if ok := k.checkRow(second); !ok { | ||
| return fmt.Errorf("no such index (second): %d", second) | ||
| } | ||
|
|
||
| k.Rows[first], k.Rows[second] = k.Rows[second], k.Rows[first] | ||
| return nil | ||
| } | ||
|
|
||
| // RowsCount returns the number of rows | ||
| func (k *Keyboard) RowsCount() int { | ||
| return len(k.Rows) | ||
| } | ||
|
|
||
| // RowSize returns the number of buttons in a row. | ||
| // If there is no such row, then returns -1 | ||
| func (k *Keyboard) RowSize(row int) int { | ||
| if ok := k.checkRow(row); !ok { | ||
| return -1 | ||
| } | ||
| return len(k.Rows[row]) | ||
| } | ||
|
|
||
| // GetKeyboard returns an array of button rows | ||
| func (k *Keyboard) GetKeyboard() [][]Button { | ||
| return k.Rows | ||
| } | ||
|
|
||
| // checkRow checks that the index of row doesnt go beyond the bounds of the array | ||
| func (k *Keyboard) checkRow(i int) bool { | ||
| return i >= 0 && i < len(k.Rows) | ||
| } | ||
|
|
||
| // checkButton checks that the button and row indexes doesnt go beyond the bounds of the array | ||
| func (k *Keyboard) checkButton(row, button int) bool { | ||
| return k.checkRow(row) && button >= 0 && button < len(k.Rows[row]) | ||
| } |
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