InlineKeyboardPagination::__construct() - Code Metrics - Inspection of "Add custom callback_data format." - php-telegram-bot/inline-keyboard-pagination - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — develop ( 9c7ec6...e33a39 )

by Armando

created 2017-09-07 12:09 UTC

InlineKeyboardPagination::__construct() A

↳ Parent: InlineKeyboardPagination

Complexity

Conditions	1
Paths	1

Size

Total Lines	7
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	7
c	0
b	0
f	0
rs	9.4285
cc	1
eloc	5
nc	1
nop	4

<?php

namespace TelegramBot\InlineKeyboardPagination;

use TelegramBot\InlineKeyboardPagination\Exceptions\InlineKeyboardPaginationException;

/**
 * Class InlineKeyboardPagination
 *
 * @package TelegramBot\InlineKeyboardPagination
 */
class InlineKeyboardPagination implements InlineKeyboardPaginator
{
    /**
     * @var integer
     */
    private $items_per_page;

    /**
     * @var integer
     */
    private $max_buttons = 5;

    /**
     * @var bool
     */
    private $force_button_count = false;

    /**
     * @var integer
     */
    private $selected_page;

    /**
     * @var array
     */
    private $items;

    /**
     * @var string
     */
    private $command;

    /**
     * @var string
     */
    private $callback_data_format = 'command={COMMAND}&oldPage={OLD_PAGE}&newPage={NEW_PAGE}';

    /**
     * @var array
     */
    private $labels = [
        'default'  => '%d',
        'first'    => '« %d',
        'previous' => '‹ %d',
        'current'  => '· %d ·',
        'next'     => '%d ›',
        'last'     => '%d »',
    ];

    /**
     * @inheritdoc
     * @throws InlineKeyboardPaginationException
     */
    public function setMaxButtons(int $max_buttons = 5, bool $force_button_count = false): InlineKeyboardPagination
    {
        if ($max_buttons < 5 || $max_buttons > 8) {
            throw new InlineKeyboardPaginationException('Invalid max buttons, must be between 5 and 8.');
        }
        $this->max_buttons        = $max_buttons;
        $this->force_button_count = $force_button_count;

        return $this;
    }

    /**
     * Get the current callback format.
     *
     * @return string
     */
    public function getCallbackDataFormat(): string
    {
        return $this->callback_data_format;
    }

    /**
     * Set the callback_data format.
     *
     * @param string $callback_data_format
     *
     * @return InlineKeyboardPagination
     */
    public function setCallbackDataFormat(string $callback_data_format): InlineKeyboardPagination
    {
        $this->callback_data_format = $callback_data_format;

        return $this;
    }

    /**
     * Return list of keyboard button labels.
     *
     * @return array
     */
    public function getLabels(): array
    {
        return $this->labels;
    }

    /**
     * Set the keyboard button labels.
     *
     * @param array $labels
     *
     * @return InlineKeyboardPagination
     */
    public function setLabels($labels): InlineKeyboardPagination
    {
        $this->labels = $labels;

        return $this;
    }

    /**
     * @inheritdoc
     */
    public function setCommand(string $command = 'pagination'): InlineKeyboardPagination
    {
        $this->command = $command;

        return $this;
    }

    /**
     * @inheritdoc
     * @throws InlineKeyboardPaginationException
     */
    public function setSelectedPage(int $selected_page): InlineKeyboardPagination
    {
        $number_of_pages = $this->getNumberOfPages();
        if ($selected_page < 1 || $selected_page > $number_of_pages) {
            throw new InlineKeyboardPaginationException('Invalid selected page, must be between 1 and ' . $number_of_pages);
        }
        $this->selected_page = $selected_page;

        return $this;
    }

    /**
     * @return int
     */
    public function getItemsPerPage(): int
    {
        return $this->items_per_page;
    }

    /**
     * @param int $items_per_page
     *
     * @return InlineKeyboardPagination
     * @throws InlineKeyboardPaginationException
     */
    public function setItemsPerPage($items_per_page): InlineKeyboardPagination
    {
        if ($items_per_page <= 0) {
            throw new InlineKeyboardPaginationException('Invalid number of items per page, must be at least 1');
        }
        $this->items_per_page = $items_per_page;

        return $this;
    }

    /**
     * @param array $items
     *
     * @return InlineKeyboardPagination
     * @throws InlineKeyboardPaginationException
     */
    public function setItems(array $items): InlineKeyboardPagination
    {
        if (empty($items)) {
            throw new InlineKeyboardPaginationException('Items list empty.');
        }
        $this->items = $items;

        return $this;
    }

    /**
     * Calculate and return the number of pages.
     *
     * @return int
     */
    public function getNumberOfPages(): int
    {
        return (int) ceil(count($this->items) / $this->items_per_page);
    }

    /**
     * TelegramBotPagination constructor.
     *
     * @inheritdoc
     * @throws InlineKeyboardPaginationException
     */
    public function __construct(array $items, string $command = 'pagination', int $selected_page = 1, int $items_per_page = 5)
    {
        $this->setCommand($command);
        $this->setItemsPerPage($items_per_page);
        $this->setItems($items);
        $this->setSelectedPage($selected_page);
    }

    /**
     * @inheritdoc
     * @throws InlineKeyboardPaginationException
     */
    public function getPagination(int $selected_page = null): array
    {
        if ($selected_page !== null) {
            $this->setSelectedPage($selected_page);
        }

        return [
            'items'    => $this->getPreparedItems(),
            'keyboard' => $this->generateKeyboard(),
        ];
    }

    /**
     * Generate the keyboard with the correctly labelled buttons.
     *
     * @return array
     */
    protected function generateKeyboard(): array
    {
        $buttons         = [];
        $number_of_pages = $this->getNumberOfPages();

        if ($number_of_pages > $this->max_buttons) {
            $buttons[1] = $this->generateButton(1);

            $range = $this->generateRange();
            for ($i = $range['from']; $i < $range['to']; $i++) {
                $buttons[$i] = $this->generateButton($i);
            }

            $buttons[$number_of_pages] = $this->generateButton($number_of_pages);
        } else {
            for ($i = 1; $i <= $number_of_pages; $i++) {
                $buttons[$i] = $this->generateButton($i);
            }
        }

        // Set the correct labels.
        foreach ($buttons as $page => &$button) {
            $in_first_block = $this->selected_page <= 3 && $page <= 3;
            $in_last_block  = $this->selected_page >= $number_of_pages - 2 && $page >= $number_of_pages - 2;

            $label_key = 'next';
            if ($page === $this->selected_page) {
                $label_key = 'current';
            } elseif ($in_first_block || $in_last_block) {
                $label_key = 'default';
            } elseif ($page === 1) {
                $label_key = 'first';
            } elseif ($page === $number_of_pages) {
                $label_key = 'last';
            } elseif ($page < $this->selected_page) {
                $label_key = 'previous';
            }

            $label = $this->labels[$label_key] ?? '';

            if ($label === '') {
                $button = null;
                continue;
            }

            $button['text'] = sprintf($label, $page);
        }

        return array_values(array_filter($buttons));
    }

    /**
     * Get the range of intermediate buttons for the keyboard.
     *
     * @return array
     */
    protected function generateRange(): array
    {
        $number_of_intermediate_buttons = $this->max_buttons - 2;
        $number_of_pages                = $this->getNumberOfPages();

        if ($this->selected_page === 1) {
            $from = 2;
            $to   = $this->max_buttons;
        } elseif ($this->selected_page === $number_of_pages) {
            $from = $number_of_pages - $number_of_intermediate_buttons;
            $to   = $number_of_pages;
        } else {
            if ($this->selected_page < 3) {
                $from = $this->selected_page;
                $to   = $this->selected_page + $number_of_intermediate_buttons;
            } elseif (($number_of_pages - $this->selected_page) < 3) {
                $from = $number_of_pages - $number_of_intermediate_buttons;
                $to   = $number_of_pages;
            } else {
                // @todo: Find a nicer solution for page 3
                if ($this->force_button_count) {
                    $from = $this->selected_page - floor($number_of_intermediate_buttons / 2);
                    $to   = $this->selected_page + ceil($number_of_intermediate_buttons / 2) + ($this->selected_page === 3 && $this->max_buttons > 5);
                } else {
                    $from = $this->selected_page - 1;
                    $to   = $this->selected_page + ($this->selected_page === 3 ? $number_of_intermediate_buttons - 1 : 2);
                }
            }
        }

        return compact('from', 'to');
    }

    /**
     * Generate the button for the passed page.
     *
     * @param int $page
     *
     * @return array
     */
    protected function generateButton(int $page): array
    {
        return [
            'text'          => (string) $page,
            'callback_data' => $this->generateCallbackData($page),
        ];
    }

    /**
     * Generate the callback data for the passed page.
     *
     * @param int $page
     *
     * @return string
     */
    protected function generateCallbackData(int $page): string
    {
        return str_replace(
            ['{COMMAND}', '{OLD_PAGE}', '{NEW_PAGE}'],
            [$this->command, $this->selected_page, $page],
            $this->callback_data_format
        );
    }

    /**
     * Get the prepared items for the selected page.
     *
     * @return array
     */
    protected function getPreparedItems(): array
    {
        return array_slice($this->items, $this->getOffset(), $this->items_per_page);
    }

    /**
     * @return int
     */
    protected function getOffset(): int
    {
        return $this->items_per_page * ($this->selected_page - 1);
    }

    /**
     * Get the parameters from the callback query.
     *
     * @param string $data
     *
     * @return array
     */
    public static function getParametersFromCallbackData($data): array
    {
        parse_str($data, $params);

        return $params;
    }
}


1			<?php
2
3			namespace TelegramBot\InlineKeyboardPagination;
4
5			use TelegramBot\InlineKeyboardPagination\Exceptions\InlineKeyboardPaginationException;
6
7			/**
8			* Class InlineKeyboardPagination
9			*
10			* @package TelegramBot\InlineKeyboardPagination
11			*/
12			class InlineKeyboardPagination implements InlineKeyboardPaginator
13			{
14			/**
15			* @var integer
16			*/
17			private $items_per_page;
18
19			/**
20			* @var integer
21			*/
22			private $max_buttons = 5;
23
24			/**
25			* @var bool
26			*/
27			private $force_button_count = false;
28
29			/**
30			* @var integer
31			*/
32			private $selected_page;
33
34			/**
35			* @var array
36			*/
37			private $items;
38
39			/**
40			* @var string
41			*/
42			private $command;
43
44			/**
45			* @var string
46			*/
47			private $callback_data_format = 'command={COMMAND}&oldPage={OLD_PAGE}&newPage={NEW_PAGE}';
48
49			/**
50			* @var array
51			*/
52			private $labels = [
53			'default' => '%d',
54			'first' => '« %d',
55			'previous' => '‹ %d',
56			'current' => '· %d ·',
57			'next' => '%d ›',
58			'last' => '%d »',
59			];
60
61			/**
62			* @inheritdoc
63			* @throws InlineKeyboardPaginationException
64			*/
65			public function setMaxButtons(int $max_buttons = 5, bool $force_button_count = false): InlineKeyboardPagination
66			{
67			if ($max_buttons < 5 \|\| $max_buttons > 8) {
68			throw new InlineKeyboardPaginationException('Invalid max buttons, must be between 5 and 8.');
69			}
70			$this->max_buttons = $max_buttons;
71			$this->force_button_count = $force_button_count;
72
73			return $this;
74			}
75
76			/**
77			* Get the current callback format.
78			*
79			* @return string
80			*/
81			public function getCallbackDataFormat(): string
82			{
83			return $this->callback_data_format;
84			}
85
86			/**
87			* Set the callback_data format.
88			*
89			* @param string $callback_data_format
90			*
91			* @return InlineKeyboardPagination
92			*/
93			public function setCallbackDataFormat(string $callback_data_format): InlineKeyboardPagination
94			{
95			$this->callback_data_format = $callback_data_format;
96
97			return $this;
98			}
99
100			/**
101			* Return list of keyboard button labels.
102			*
103			* @return array
104			*/
105			public function getLabels(): array
106			{
107			return $this->labels;
108			}
109
110			/**
111			* Set the keyboard button labels.
112			*
113			* @param array $labels
114			*
115			* @return InlineKeyboardPagination
116			*/
117			public function setLabels($labels): InlineKeyboardPagination
118			{
119			$this->labels = $labels;
120
121			return $this;
122			}
123
124			/**
125			* @inheritdoc
126			*/
127			public function setCommand(string $command = 'pagination'): InlineKeyboardPagination
128			{
129			$this->command = $command;
130
131			return $this;
132			}
133
134			/**
135			* @inheritdoc
136			* @throws InlineKeyboardPaginationException
137			*/
138			public function setSelectedPage(int $selected_page): InlineKeyboardPagination
139			{
140			$number_of_pages = $this->getNumberOfPages();
141			if ($selected_page < 1 \|\| $selected_page > $number_of_pages) {
142			throw new InlineKeyboardPaginationException('Invalid selected page, must be between 1 and ' . $number_of_pages);
143			}
144			$this->selected_page = $selected_page;
145
146			return $this;
147			}
148
149			/**
150			* @return int
151			*/
152			public function getItemsPerPage(): int
153			{
154			return $this->items_per_page;
155			}
156
157			/**
158			* @param int $items_per_page
159			*
160			* @return InlineKeyboardPagination
161			* @throws InlineKeyboardPaginationException
162			*/
163			public function setItemsPerPage($items_per_page): InlineKeyboardPagination
164			{
165			if ($items_per_page <= 0) {
166			throw new InlineKeyboardPaginationException('Invalid number of items per page, must be at least 1');
167			}
168			$this->items_per_page = $items_per_page;
169
170			return $this;
171			}
172
173			/**
174			* @param array $items
175			*
176			* @return InlineKeyboardPagination
177			* @throws InlineKeyboardPaginationException
178			*/
179			public function setItems(array $items): InlineKeyboardPagination
180			{
181			if (empty($items)) {
182			throw new InlineKeyboardPaginationException('Items list empty.');
183			}
184			$this->items = $items;
185
186			return $this;
187			}
188
189			/**
190			* Calculate and return the number of pages.
191			*
192			* @return int
193			*/
194			public function getNumberOfPages(): int
195			{
196			return (int) ceil(count($this->items) / $this->items_per_page);
197			}
198
199			/**
200			* TelegramBotPagination constructor.
201			*
202			* @inheritdoc
203			* @throws InlineKeyboardPaginationException
204			*/
205			public function __construct(array $items, string $command = 'pagination', int $selected_page = 1, int $items_per_page = 5)
206			{
207			$this->setCommand($command);
208			$this->setItemsPerPage($items_per_page);
209			$this->setItems($items);
210			$this->setSelectedPage($selected_page);
211			}
212
213			/**
214			* @inheritdoc
215			* @throws InlineKeyboardPaginationException
216			*/
217			public function getPagination(int $selected_page = null): array
218			{
219			if ($selected_page !== null) {
220			$this->setSelectedPage($selected_page);
221			}
222
223			return [
224			'items' => $this->getPreparedItems(),
225			'keyboard' => $this->generateKeyboard(),
226			];
227			}
228
229			/**
230			* Generate the keyboard with the correctly labelled buttons.
231			*
232			* @return array
233			*/
234			protected function generateKeyboard(): array
235			{
236			$buttons = [];
237			$number_of_pages = $this->getNumberOfPages();
238
239			if ($number_of_pages > $this->max_buttons) {
240			$buttons[1] = $this->generateButton(1);
241
242			$range = $this->generateRange();
243			for ($i = $range['from']; $i < $range['to']; $i++) {
244			$buttons[$i] = $this->generateButton($i);
245			}
246
247			$buttons[$number_of_pages] = $this->generateButton($number_of_pages);
248			} else {
249			for ($i = 1; $i <= $number_of_pages; $i++) {
250			$buttons[$i] = $this->generateButton($i);
251			}
252			}
253
254			// Set the correct labels.
255			foreach ($buttons as $page => &$button) {
256			$in_first_block = $this->selected_page <= 3 && $page <= 3;
257			$in_last_block = $this->selected_page >= $number_of_pages - 2 && $page >= $number_of_pages - 2;
258
259			$label_key = 'next';
260			if ($page === $this->selected_page) {
261			$label_key = 'current';
262			} elseif ($in_first_block \|\| $in_last_block) {
263			$label_key = 'default';
264			} elseif ($page === 1) {
265			$label_key = 'first';
266			} elseif ($page === $number_of_pages) {
267			$label_key = 'last';
268			} elseif ($page < $this->selected_page) {
269			$label_key = 'previous';
270			}
271
272			$label = $this->labels[$label_key] ?? '';
273
274			if ($label === '') {
275			$button = null;
276			continue;
277			}
278
279			$button['text'] = sprintf($label, $page);
280			}
281
282			return array_values(array_filter($buttons));
283			}
284
285			/**
286			* Get the range of intermediate buttons for the keyboard.
287			*
288			* @return array
289			*/
290			protected function generateRange(): array
291			{
292			$number_of_intermediate_buttons = $this->max_buttons - 2;
293			$number_of_pages = $this->getNumberOfPages();
294
295			if ($this->selected_page === 1) {
296			$from = 2;
297			$to = $this->max_buttons;
298			} elseif ($this->selected_page === $number_of_pages) {
299			$from = $number_of_pages - $number_of_intermediate_buttons;
300			$to = $number_of_pages;
301			} else {
302			if ($this->selected_page < 3) {
303			$from = $this->selected_page;
304			$to = $this->selected_page + $number_of_intermediate_buttons;
305			} elseif (($number_of_pages - $this->selected_page) < 3) {
306			$from = $number_of_pages - $number_of_intermediate_buttons;
307			$to = $number_of_pages;
308			} else {
309			// @todo: Find a nicer solution for page 3
310			if ($this->force_button_count) {
311			$from = $this->selected_page - floor($number_of_intermediate_buttons / 2);
312			$to = $this->selected_page + ceil($number_of_intermediate_buttons / 2) + ($this->selected_page === 3 && $this->max_buttons > 5);
313			} else {
314			$from = $this->selected_page - 1;
315			$to = $this->selected_page + ($this->selected_page === 3 ? $number_of_intermediate_buttons - 1 : 2);
316			}
317			}
318			}
319
320			return compact('from', 'to');
321			}
322
323			/**
324			* Generate the button for the passed page.
325			*
326			* @param int $page
327			*
328			* @return array
329			*/
330			protected function generateButton(int $page): array
331			{
332			return [
333			'text' => (string) $page,
334			'callback_data' => $this->generateCallbackData($page),
335			];
336			}
337
338			/**
339			* Generate the callback data for the passed page.
340			*
341			* @param int $page
342			*
343			* @return string
344			*/
345			protected function generateCallbackData(int $page): string
346			{
347			return str_replace(
348			['{COMMAND}', '{OLD_PAGE}', '{NEW_PAGE}'],
349			[$this->command, $this->selected_page, $page],
350			$this->callback_data_format
351			);
352			}
353
354			/**
355			* Get the prepared items for the selected page.
356			*
357			* @return array
358			*/
359			protected function getPreparedItems(): array
360			{
361			return array_slice($this->items, $this->getOffset(), $this->items_per_page);
362			}
363
364			/**
365			* @return int
366			*/
367			protected function getOffset(): int
368			{
369			return $this->items_per_page * ($this->selected_page - 1);
370			}
371
372			/**
373			* Get the parameters from the callback query.
374			*
375			* @param string $data
376			*
377			* @return array
378			*/
379			public static function getParametersFromCallbackData($data): array
380			{
381			parse_str($data, $params);
382
383			return $params;
384			}
385			}
386

php-telegram-bot / inline-keyboard-pagination

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InlineKeyboardPagination::__construct() A

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