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<?php

/**
 * Hoa
 *
 *
 * @license
 *
 * New BSD License
 *
 * Copyright © 2007-2017, Hoa community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Hoa nor the names of its contributors may be
 *       used to endorse or promote products derived from this software without
 *       specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

namespace Psy\Readline\Hoa;

/**
 * Class \Hoa\Console\Tput.
 *
 * Query terminfo database.
 * Resources:
 *     • http://man.cx/terminfo(5),
 *     • http://pubs.opengroup.org/onlinepubs/7908799/xcurses/terminfo.html,
 */
class ConsoleTput
{
    /**
     * Booleans.
     */
    protected static $_booleans = [
        'auto_left_margin',
        'auto_right_margin',
        'no_esc_ctlc',
        'ceol_standout_glitch',
        'eat_newline_glitch',
        'erase_overstrike',
        'generic_type',
        'hard_copy',
        'meta_key', // originally has_meta_key
        'status_line', // originally has_status_line
        'insert_null_glitch',
        'memory_above',
        'memory_below',
        'move_insert_mode',
        'move_standout_mode',
        'over_strike',
        'status_line_esc_ok',
        'dest_tabs_magic_smso',
        'tilde_glitch',
        'transparent_underline',
        'xon_xoff',
        'needs_xon_xoff',
        'prtr_silent',
        'hard_cursor',
        'non_rev_rmcup',
        'no_pad_char',
        'non_dest_scroll_region',
        'can_change',
        'back_color_erase',
        'hue_lightness_saturation',
        'col_addr_glitch',
        'cr_cancels_micro_mode',
        'print_wheel', // originally has_print_wheel
        'row_addr_glitch',
        'semi_auto_right_margin',
        'cpi_changes_res',
        'lpi_changes_res',
        // #ifdef __INTERNAL_CAPS_VISIBLE
        'backspaces_with_bs',
        'crt_no_scrolling',
        'no_correctly_working_cr',
        'gnu_meta_key', // originally gnu_has_meta_key
        'linefeed_is_newline',
        'hardware_tabs', // originally has_hardware_tabs
        'return_does_clr_eol',
    ];

    /**
     * Numbers.
     */
    protected static $_numbers = [
        'columns',
        'init_tabs',
        'lines',
        'lines_of_memory',
        'magic_cookie_glitch',
        'padding_baud_rate',
        'virtual_terminal',
        'width_status_line',
        'num_labels',
        'label_height',
        'label_width',
        'max_attributes',
        'maximum_windows',
        'max_colors',
        'max_pairs',
        'no_color_video',
        'buffer_capacity',
        'dot_vert_spacing',
        'dot_horz_spacing',
        'max_micro_address',
        'max_micro_jump',
        'micro_col_size',
        'micro_line_size',
        'number_of_pins',
        'output_res_char',
        'output_res_line',
        'output_res_horz_inch',
        'output_res_vert_inch',
        'print_rate',
        'wide_char_size',
        'buttons',
        'bit_image_entwining',
        'bit_image_type',
        // #ifdef __INTERNAL_CAPS_VISIBLE
        'magic_cookie_glitch_ul',
        'carriage_return_delay',
        'new_line_delay',
        'backspace_delay',
        'horizontal_tab_delay',
        'number_of_function_keys',
    ];

    /**
     * Strings.
     */
    protected static $_strings = [
        'back_tab',
        'bell',
        'carriage_return',
        'change_scroll_region',
        'clear_all_tabs',
        'clear_screen',
        'clr_eol',
        'clr_eos',
        'column_address',
        'command_character',
        'cursor_address',
        'cursor_down',
        'cursor_home',
        'cursor_invisible',
        'cursor_left',
        'cursor_mem_address',
        'cursor_normal',
        'cursor_right',
        'cursor_to_ll',
        'cursor_up',
        'cursor_visible',
        'delete_character',
        'delete_line',
        'dis_status_line',
        'down_half_line',
        'enter_alt_charset_mode',
        'enter_blink_mode',
        'enter_bold_mode',
        'enter_ca_mode',
        'enter_delete_mode',
        'enter_dim_mode',
        'enter_insert_mode',
        'enter_secure_mode',
        'enter_protected_mode',
        'enter_reverse_mode',
        'enter_standout_mode',
        'enter_underline_mode',
        'erase_chars',
        'exit_alt_charset_mode',
        'exit_attribute_mode',
        'exit_ca_mode',
        'exit_delete_mode',
        'exit_insert_mode',
        'exit_standout_mode',
        'exit_underline_mode',
        'flash_screen',
        'form_feed',
        'from_status_line',
        'init_1string',
        'init_2string',
        'init_3string',
        'init_file',
        'insert_character',
        'insert_line',
        'insert_padding',
        'key_backspace',
        'key_catab',
        'key_clear',
        'key_ctab',
        'key_dc',
        'key_dl',
        'key_down',
        'key_eic',
        'key_eol',
        'key_eos',
        'key_f0',
        'key_f1',
        'key_f10',
        'key_f2',
        'key_f3',
        'key_f4',
        'key_f5',
        'key_f6',
        'key_f7',
        'key_f8',
        'key_f9',
        'key_home',
        'key_ic',
        'key_il',
        'key_left',
        'key_ll',
        'key_npage',
        'key_ppage',
        'key_right',
        'key_sf',
        'key_sr',
        'key_stab',
        'key_up',
        'keypad_local',
        'keypad_xmit',
        'lab_f0',
        'lab_f1',
        'lab_f10',
        'lab_f2',
        'lab_f3',
        'lab_f4',
        'lab_f5',
        'lab_f6',
        'lab_f7',
        'lab_f8',
        'lab_f9',
        'meta_off',
        'meta_on',
        'newline',
        'pad_char',
        'parm_dch',
        'parm_delete_line',
        'parm_down_cursor',
        'parm_ich',
        'parm_index',
        'parm_insert_line',
        'parm_left_cursor',
        'parm_right_cursor',
        'parm_rindex',
        'parm_up_cursor',
        'pkey_key',
        'pkey_local',
        'pkey_xmit',
        'print_screen',
        'prtr_off',
        'prtr_on',
        'repeat_char',
        'reset_1string',
        'reset_2string',
        'reset_3string',
        'reset_file',
        'restore_cursor',
        'row_address',
        'save_cursor',
        'scroll_forward',
        'scroll_reverse',
        'set_attributes',
        'set_tab',
        'set_window',
        'tab',
        'to_status_line',
        'underline_char',
        'up_half_line',
        'init_prog',
        'key_a1',
        'key_a3',
        'key_b2',
        'key_c1',
        'key_c3',
        'prtr_non',
        'char_padding',
        'acs_chars',
        'plab_norm',
        'key_btab',
        'enter_xon_mode',
        'exit_xon_mode',
        'enter_am_mode',
        'exit_am_mode',
        'xon_character',
        'xoff_character',
        'ena_acs',
        'label_on',
        'label_off',
        'key_beg',
        'key_cancel',
        'key_close',
        'key_command',
        'key_copy',
        'key_create',
        'key_end',
        'key_enter',
        'key_exit',
        'key_find',
        'key_help',
        'key_mark',
        'key_message',
        'key_move',
        'key_next',
        'key_open',
        'key_options',
        'key_previous',
        'key_print',
        'key_redo',
        'key_reference',
        'key_refresh',
        'key_replace',
        'key_restart',
        'key_resume',
        'key_save',
        'key_suspend',
        'key_undo',
        'key_sbeg',
        'key_scancel',
        'key_scommand',
        'key_scopy',
        'key_screate',
        'key_sdc',
        'key_sdl',
        'key_select',
        'key_send',
        'key_seol',
        'key_sexit',
        'key_sfind',
        'key_shelp',
        'key_shome',
        'key_sic',
        'key_sleft',
        'key_smessage',
        'key_smove',
        'key_snext',
        'key_soptions',
        'key_sprevious',
        'key_sprint',
        'key_sredo',
        'key_sreplace',
        'key_sright',
        'key_srsume',
        'key_ssave',
        'key_ssuspend',
        'key_sundo',
        'req_for_input',
        'key_f11',
        'key_f12',
        'key_f13',
        'key_f14',
        'key_f15',
        'key_f16',
        'key_f17',
        'key_f18',
        'key_f19',
        'key_f20',
        'key_f21',
        'key_f22',
        'key_f23',
        'key_f24',
        'key_f25',
        'key_f26',
        'key_f27',
        'key_f28',
        'key_f29',
        'key_f30',
        'key_f31',
        'key_f32',
        'key_f33',
        'key_f34',
        'key_f35',
        'key_f36',
        'key_f37',
        'key_f38',
        'key_f39',
        'key_f40',
        'key_f41',
        'key_f42',
        'key_f43',
        'key_f44',
        'key_f45',
        'key_f46',
        'key_f47',
        'key_f48',
        'key_f49',
        'key_f50',
        'key_f51',
        'key_f52',
        'key_f53',
        'key_f54',
        'key_f55',
        'key_f56',
        'key_f57',
        'key_f58',
        'key_f59',
        'key_f60',
        'key_f61',
        'key_f62',
        'key_f63',
        'clr_bol',
        'clear_margins',
        'set_left_margin',
        'set_right_margin',
        'label_format',
        'set_clock',
        'display_clock',
        'remove_clock',
        'create_window',
        'goto_window',
        'hangup',
        'dial_phone',
        'quick_dial',
        'tone',
        'pulse',
        'flash_hook',
        'fixed_pause',
        'wait_tone',
        'user0',
        'user1',
        'user2',
        'user3',
        'user4',
        'user5',
        'user6',
        'user7',
        'user8',
        'user9',
        'orig_pair',
        'orig_colors',
        'initialize_color',
        'initialize_pair',
        'set_color_pair',
        'set_foreground',
        'set_background',
        'change_char_pitch',
        'change_line_pitch',
        'change_res_horz',
        'change_res_vert',
        'define_char',
        'enter_doublewide_mode',
        'enter_draft_quality',
        'enter_italics_mode',
        'enter_leftward_mode',
        'enter_micro_mode',
        'enter_near_letter_quality',
        'enter_normal_quality',
        'enter_shadow_mode',
        'enter_subscript_mode',
        'enter_superscript_mode',
        'enter_upward_mode',
        'exit_doublewide_mode',
        'exit_italics_mode',
        'exit_leftward_mode',
        'exit_micro_mode',
        'exit_shadow_mode',
        'exit_subscript_mode',
        'exit_superscript_mode',
        'exit_upward_mode',
        'micro_column_address',
        'micro_down',
        'micro_left',
        'micro_right',
        'micro_row_address',
        'micro_up',
        'order_of_pins',
        'parm_down_micro',
        'parm_left_micro',
        'parm_right_micro',
        'parm_up_micro',
        'select_char_set',
        'set_bottom_margin',
        'set_bottom_margin_parm',
        'set_left_margin_parm',
        'set_right_margin_parm',
        'set_top_margin',
        'set_top_margin_parm',
        'start_bit_image',
        'start_char_set_def',
        'stop_bit_image',
        'stop_char_set_def',
        'subscript_characters',
        'superscript_characters',
        'these_cause_cr',
        'zero_motion',
        'char_set_names',
        'key_mouse',
        'mouse_info',
        'req_mouse_pos',
        'get_mouse',
        'set_a_foreground',
        'set_a_background',
        'pkey_plab',
        'device_type',
        'code_set_init',
        'set0_des_seq',
        'set1_des_seq',
        'set2_des_seq',
        'set3_des_seq',
        'set_lr_margin',
        'set_tb_margin',
        'bit_image_repeat',
        'bit_image_newline',
        'bit_image_carriage_return',
        'color_names',
        'define_bit_image_region',
        'end_bit_image_region',
        'set_color_band',
        'set_page_length',
        'display_pc_char',
        'enter_pc_charset_mode',
        'exit_pc_charset_mode',
        'enter_scancode_mode',
        'exit_scancode_mode',
        'pc_term_options',
        'scancode_escape',
        'alt_scancode_esc',
        'enter_horizontal_hl_mode',
        'enter_left_hl_mode',
        'enter_low_hl_mode',
        'enter_right_hl_mode',
        'enter_top_hl_mode',
        'enter_vertical_hl_mode',
        'set_a_attributes',
        'set_pglen_inch',
        // #ifdef __INTERNAL_CAPS_VISIBLE
        'termcap_init2',
        'termcap_reset',
        'linefeed_if_not_lf',
        'backspace_if_not_bs',
        'other_non_function_keys',
        'arrow_key_map',
        'acs_ulcorner',
        'acs_llcorner',
        'acs_urcorner',
        'acs_lrcorner',
        'acs_ltee',
        'acs_rtee',
        'acs_btee',
        'acs_ttee',
        'acs_hline',
        'acs_vline',
        'acs_plus',
        'memory_lock',
        'memory_unlock',
        'box_chars_1',
    ];

    /**
     * Computed informations.
     */
    protected $_informations = [];

    /**
     * Set stream and parse.
     */
    public function __construct($terminfo = null)
    {
        if (null === $terminfo) {
            $terminfo = static::getTerminfo();
        }

        $this->parse($terminfo);

        return;
    }

    /**
     * Parse.
     */
    protected function parse(string $terminfo): array
    {
        if (!\file_exists($terminfo)) {
            throw new ConsoleException('Terminfo file %s does not exist.', 0, $terminfo);
        }

        $data = \file_get_contents($terminfo);
        $length = \strlen($data);
        $out = ['file' => $terminfo];

        $headers = [
            'data_size'         => $length,
            'header_size'       => 12,
            'magic_number'      => (\ord($data[1]) << 8) | \ord($data[0]),
            'names_size'        => (\ord($data[3]) << 8) | \ord($data[2]),
            'bool_count'        => (\ord($data[5]) << 8) | \ord($data[4]),
            'number_count'      => (\ord($data[7]) << 8) | \ord($data[6]),
            'string_count'      => (\ord($data[9]) << 8) | \ord($data[8]),
            'string_table_size' => (\ord($data[11]) << 8) | \ord($data[10]),
        ];
        $out['headers'] = $headers;

        // Names.
        $i = $headers['header_size'];
        $nameAndDescription = \explode('|', \substr($data, $i, $headers['names_size'] - 1));
        $out['name'] = $nameAndDescription[0];
        $out['description'] = $nameAndDescription[1];

        // Booleans.
        $i += $headers['names_size'];
        $booleans = [];
        $booleanNames = &static::$_booleans;

        for (
            $e = 0, $max = $i + $headers['bool_count'];
            $i < $max;
            ++$e, ++$i
        ) {
            $booleans[$booleanNames[$e]] = 1 === \ord($data[$i]);
        }

        $out['booleans'] = $booleans;

        // Numbers.
        if (1 === ($i % 2)) {
            ++$i;
        }

        $numbers = [];
        $numberNames = &static::$_numbers;

        for (
            $e = 0, $max = $i + $headers['number_count'] * 2;
            $i < $max;
            ++$e, $i += 2
        ) {
            $name = $numberNames[$e];
            $data_i0 = \ord($data[$i]);
            $data_i1 = \ord($data[$i + 1]);

            if ($data_i1 === 255 && $data_i0 === 255) {
                $numbers[$name] = -1;
            } else {
                $numbers[$name] = ($data_i1 << 8) | $data_i0;
            }
        }

        $out['numbers'] = $numbers;

        // Strings.
        $strings = [];
        $stringNames = &static::$_strings;
        $ii = $i + $headers['string_count'] * 2;

        for (
            $e = 0, $max = $ii;
            $i < $max;
            ++$e, $i += 2
        ) {
            $name = $stringNames[$e];
            $data_i0 = \ord($data[$i]);
            $data_i1 = \ord($data[$i + 1]);

            if ($data_i1 === 255 && $data_i0 === 255) {
                continue;
            }

            $a = ($data_i1 << 8) | $data_i0;
            $strings[$name] = $a;

            if (65534 === $a) {
                continue;
            }

            $b = $ii + $a;
            $c = $b;

            while ($c < $length && \ord($data[$c])) {
                $c++;
            }

            $value = \substr($data, $b, $c - $b);
            $strings[$name] = false !== $value ? $value : null;
        }

        $out['strings'] = $strings;

        return $this->_informations = $out;
    }

    /**
     * Get all informations.
     */
    public function getInformations(): array
    {
        return $this->_informations;
    }

    /**
     * Get a boolean value.
     */
    public function has(string $boolean): bool
    {
        if (!isset($this->_informations['booleans'][$boolean])) {
            return false;
        }

        return $this->_informations['booleans'][$boolean];
    }

    /**
     * Get a number value.
     */
    public function count(string $number): int
    {
        if (!isset($this->_informations['numbers'][$number])) {
            return 0;
        }

        return $this->_informations['numbers'][$number];
    }

    /**
     * Get a string value.
     */
    public function get(string $string)
    {
        if (!isset($this->_informations['strings'][$string])) {
            return null;
        }

        return $this->_informations['strings'][$string];
    }

    /**
     * Get current term profile.
     */
    public static function getTerm(): string
    {
        return
            isset($_SERVER['TERM']) && !empty($_SERVER['TERM'])
                ? $_SERVER['TERM']
                : (\defined('PHP_WINDOWS_VERSION_PLATFORM') ? 'windows-ansi' : 'xterm');
    }

    /**
     * Get pathname to the current terminfo.
     */
    public static function getTerminfo($term = null): string
    {
        $paths = [];

        if (isset($_SERVER['TERMINFO'])) {
            $paths[] = $_SERVER['TERMINFO'];
        }

        if (isset($_SERVER['HOME'])) {
            $paths[] = $_SERVER['HOME'].\DIRECTORY_SEPARATOR.'.terminfo';
        }

        if (isset($_SERVER['TERMINFO_DIRS'])) {
            foreach (\explode(':', $_SERVER['TERMINFO_DIRS']) as $path) {
                $paths[] = $path;
            }
        }

        $paths[] = '/usr/share/terminfo';
        $paths[] = '/usr/share/lib/terminfo';
        $paths[] = '/lib/terminfo';
        $paths[] = '/usr/lib/terminfo';
        $paths[] = '/usr/local/share/terminfo';
        $paths[] = '/usr/local/share/lib/terminfo';
        $paths[] = '/usr/local/lib/terminfo';
        $paths[] = '/usr/local/ncurses/lib/terminfo';
        $paths[] = 'hoa://Library/Terminfo';

        $term = $term ?: static::getTerm();
        $fileHexa = \dechex(\ord($term[0])).\DIRECTORY_SEPARATOR.$term;
        $fileAlpha = $term[0].\DIRECTORY_SEPARATOR.$term;
        $pathname = null;

        foreach ($paths as $path) {
            if (\file_exists($_ = $path.\DIRECTORY_SEPARATOR.$fileHexa) ||
                \file_exists($_ = $path.\DIRECTORY_SEPARATOR.$fileAlpha)) {
                $pathname = $_;

                break;
            }
        }

        if (null === $pathname && 'xterm' !== $term) {
            return static::getTerminfo('xterm');
        }

        return $pathname ?? '';
    }

    /**
     * Check whether all required terminfo capabilities are defined.
     */
    public static function isSupported(): bool
    {
        if (static::getTerminfo() === '') {
            return false;
        }

        $requiredVars = [
            'clear_screen',
            'clr_bol',
            'clr_eol',
            'clr_eos',
            'initialize_color',
            'parm_down_cursor',
            'parm_index',
            'parm_left_cursor',
            'parm_right_cursor',
            'parm_rindex',
            'parm_up_cursor',
            'user6',
            'user7',
        ];

        $tput = new self();

        foreach ($requiredVars as $var) {
            if ($tput->get($var) === null) {
                return false;
            }
        }

        return true;
    }
}