netkorp / spring-boot-telegram-framework

@Component

public class CommandManager {

    private final Map<String, Command> commands;

    private final Map<String, Command> freeCommands;

    private final Map<Long, MultistageCommand> activeCommand;

    private String closeCommand;

    private String doneCommand;

    private String helpCommand;

    @Autowired

    public CommandManager(List<Command> commands, PollingTelegramBot bot, @Value("${telegram.commands.free}") String freeCommands) {

        this.commands = new HashMap<>();

        this.freeCommands = new HashMap<>();

        this.activeCommand = new HashMap<>();

        commands.stream()

                .filter(item -> item.getClass().isAnnotationPresent(TelegramCommand.class))

                .forEach(command -> addCommand(command, bot, Arrays.asList(freeCommands.split(","))));

    }

    private void addCommand(Command command, PollingTelegramBot bot, List<String> freeCommandNames) {

        command.setBot(bot);

        command.setCommandManager(this);

        this.commands.put(getCommand(command), command);

        if (isFreeCommand(command, freeCommandNames)) {

            this.freeCommands.put(getCommand(command), command);

        }

        if (command instanceof CloseCommand) {

            closeCommand = getCommand(command);

        } else if (command instanceof DoneCommand) {

            doneCommand = getCommand(command);

        } else if (command instanceof HelpCommand) {

            helpCommand = getCommand(command);

        }

    }

    private boolean isFreeCommand(Command command, List<String> freeCommandNames) {

        return freeCommandNames.contains(getCommandName(command))

                || freeCommandNames.contains(getCommand(command))

                || command.getClass().getAnnotation(TelegramCommand.class).free();

    }

    @SuppressWarnings("WeakerAccess")

    public static String getCommandName(Command command) {

        return command.getClass().getAnnotation(TelegramCommand.class).name();

    }

    public static String getCommand(Command command) {

        String commandName = getCommandName(command);

        return commandName.startsWith("/") ? commandName : String.format("/%s", commandName);

    }

    /**

     * Returns the {@link Command} instance from a given getName.

     *

     * @param command The commands as {@link String}.

     * @return The {@link Command} instance.

     * @throws CommandNotFound If the given name is not related to any commands.

     */

    public Command getCommand(String command) throws CommandNotFound {

        if (!this.commands.containsKey(command)) {

            throw new CommandNotFound();

        }

        return this.commands.get(command);

    }

    public Command getFreeCommand(String command) throws CommandNotFound {

        if (!this.freeCommands.containsKey(command)) {

            throw new CommandNotFound();

        }

        return this.freeCommands.get(command);

    }

    public void setActiveCommand(final Long idChat, final MultistageCommand command) {

        this.activeCommand.put(idChat, command);

    }

    /**

     * Gets the active commands for a given user.

     *

     * @param idChat Chat id of the user.

     * @return The active commands.

     */

    public MultistageCommand getActiveCommand(Long idChat) throws CommandNotActive {

        if (!hasActiveCommand(idChat)) {

            throw new CommandNotActive();

        }

        return activeCommand.get(idChat);

    }

    /**

     * Removes the active commands.

     *

     * @param idChat Chat id of the user.

     */

    public void removeActiveCommand(Long idChat) {

        activeCommand.remove(idChat);

    }

    /**

     * Is there an active commands or not?

     *

     * @param idChat Chat id of the user.

     * @return If there is active commands or not.

     */

    public boolean hasActiveCommand(Long idChat) {

        return activeCommand.containsKey(idChat);

    }

    /**

     * Returns the {@link CloseCommand} if it exists.

     *

     * @return The {@link CloseCommand} instance.

     */

    public Optional<Command> getCloseCommand() {

        try {

            return Optional.ofNullable(getCommand(this.closeCommand));

        } catch (CommandNotFound commandNotFound) {

            return Optional.empty();

        }

    }

    /**

     * Returns the {@link DoneCommand} if it exists.

     *

     * @return The {@link DoneCommand} instance.

     */

    public Optional<Command> getDoneCommand() {

        try {

            return Optional.ofNullable(getCommand(this.doneCommand));

        } catch (CommandNotFound commandNotFound) {

            return Optional.empty();

        }

    }

    /**

     * Returns the {@link HelpCommand} if it exists.

     *

     * @return The {@link HelpCommand} instance.

     */

    public Optional<Command> getHelpCommand() {

        try {

            return Optional.ofNullable(getCommand(this.helpCommand));

        } catch (CommandNotFound commandNotFound) {

            return Optional.empty();

        }

    }

    /**

     * Returns a list with the available commands.

     *

     * @return Available commands.

     */

    public Collection<Command> getAvailableCommands() {

        return commands.values();

    }

    /**

     * Returns a list with the available free commands.

     *

     * @return Available free commands.

     */

    public Collection<Command> getAvailableFreeCommands() {

        return freeCommands.values();