PHPTemplate::offsetExists() - Code Metrics - Ayesh/PHPTemplate - Measure and Improve Code Quality continuously with Scrutinizer

PHPTemplate::offsetExists() A
last analyzed 2020-01-01 00:38 UTC

↳ Parent: PHPTemplate

Complexity

Conditions	1
Paths	1

Size

Total Lines	2
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Importance

Changes	4
Bugs	0	Features	0

Metric	Value
cc	1
eloc	1
c	4
b	0
f	0
nc	1
nop	1
dl	0
loc	2
rs	10

<?php

namespace Ayesh\PHPTemplate;

use Ayesh\PHPTemplate\Exception\BadMethodCallException;
use Ayesh\PHPTemplate\Exception\TemplateError;
use Ayesh\PHPTemplate\Exception\TemplateNotFound;

final class PHPTemplate implements \ArrayAccess {

  /**
   * @var array Raw user-provided variables.
   */
  private $vars;

  /**
   * @var string Template file path.
   */
  private $template_file;

  /**
   * @var array Allowed url protocols.
   */
  private const ALLOWED_URL_PROTOCOLS = [
    'http',
    'https',
    'ftp'
  ];

  public function __construct(string $template_file = null, array $vars = []) {
    $this->template_file = $template_file;
    $this->set($vars);
  }

  /**
   * Set view data. This overwrites existing variables.
   *
   * @param array $vars The view data
   * @return void
   */
  public function set(array $vars = []): void {
    $this->vars = $vars;
  }

  /**
   * Render template.
   *
   * @param array|null $vars The view data. If not provided, variables set in a
   *  provious set() call or the constructor will be used.
   * @return string Rendered template.
   * @throws \Throwable
   */
  public function render(array $vars = null): string {
    if (empty($this->template_file)) {
      throw new BadMethodCallException('Calls to render() method is illegal when a template path is not set.');
    }
    if (!file_exists($this->template_file)) {
      throw new TemplateNotFound(sprintf('Template %s could not be loaded.', $this->template_file));
    }

    if (null !== $vars) {
      $this->set($vars);
    }

    return trim(self::renderTemplate($this->template_file, $this));
  }

  /**
   * Render template.
   *
   * @param string $path The path to the template file.
   * @param PHPTemplate $v The PHPTemplate instance
   * @return string The rendered content
   * @throws \Throwable
   */
  private static function renderTemplate(string $path, PHPTemplate $v): string {
    ob_start();
    try {
      /** @noinspection PhpIncludeInspection */
      include $path;
    } catch (\Throwable $exception) {
      ob_end_clean();
      throw $exception;
    }

    return ob_get_clean();
  }

  /**
   * Get view data by key name WITHOUT applying any sanitization filters. Use
   *  array access pattern (e.g $v['var']) to benefit from automatic string
   *  sanitization functions.
   *
   * @param string $key The key of the user-provided to variable to fetch.
   * @return mixed|null The raw value, or null if not set.
   */
  public function get(string $key) {
    return $this->vars[$key] ?? NULL;
  }

  /**
   * Check whether an offset exists.
   *
   * @param string $offset An offset to check for
   * @return bool Returns true if the offset exists and is not null. False otherwise.
   */
  public function offsetExists($offset): bool {
    return isset($this->vars[$offset]);
  }

  /**
   * Retrieve an offset from the variables, with sanitization filters applied.
   *
   * When retrieving variables, the first character is matched against a list
   * of sanitization techniques provided by this library.
   *
   * If the variable starts with a colon (":"), it will be sanitized to be used
   *  as a URL, with all dangerous protocol neatralized.
   *
   * The exclaimation character marks the variable must be returned as-is. This
   *  will still make sure it's a string, but it wil not strip any dangerous
   *  HTML and other characters. This is useful if you want to run different
   *  sanitizations functionson the raw variable and want the lubrary to stay
   *  away.
   *
   * If the variable has no special character prefix, it will be sanitized with
   *  HTML, as in no HTML will be intepreted by the browser.
   *
   * @param string $offset The offset to retrieve.
   * @return mixed Returns the value at specified offset, with the sanitization
   *   filters applied based on the way their were asked.
   */
  public function offsetGet($offset) {
    $first_char = $offset[0];

    switch ($first_char) {
      case ':':
        return $this->url($this->getVar(substr($offset, 1)));

      case '!':
        return $this->getVar(substr($offset, 1));
      default:
        return $this->escape($this->getVar($offset));
    }
  }

  /**
   * Assign a value to the specified offset.
   *
   * @param string $offset The offset to assign the value to
   * @param mixed $value The value to set
   * @return void
   */
  public function offsetSet($offset, $value): void {
    $this->vars[$offset] = $value;
  }

  /**
   * Unset an offset.
   *
   * @param string $offset The offset to unset.
   * @return void
   */
  public function offsetUnset($offset): void {
    unset($this->vars[$offset]);
  }

  private function getVar(string $offset): string {
    if (isset($this->vars[$offset]) && \is_scalar($this->vars[$offset]) && !\is_bool($this->vars[$offset])) {
      return $this->vars[$offset];
    }
    return '';
  }

  /**
   * Html encoding.
   *
   * Escapes the provided literal string to make sure it does not contain
   * anything that would be interpreted as HTML. You can also use this escape
   * method inside HTML attributes as it would also convert single and double
   * quotes to HTML entities.
   *
   * @param string $input The value to encode
   * @return string The html encoded value
   */
  public function escape(string $input): string {
    return \htmlspecialchars($input, \ENT_QUOTES | \ENT_SUBSTITUTE, 'UTF-8');
  }

  /**
   * URL encoding.
   *
   * Sanitizes the provided URL making sure it only contains relative paths,
   * or URIs whose protocol http://, https://, or ftp://. Any other protocols
   * such as javascript: will be removed.
   *
   * @param string $uri The url
   * @return string The url encoded string
   */
  public function url(string $uri): string {
    $allowed_protocols = array_flip(static::ALLOWED_URL_PROTOCOLS);

    // Iteratively remove any invalid protocol found.
    // Borrowed from Drupal.
    do {
      $before = $uri;
      $colon_position = strpos($uri, ':');
      if ($colon_position > 0) {

        // We found a colon, possibly a protocol. Verify.
        $protocol = substr($uri, 0, $colon_position);

        // If a colon is preceded by a slash, question mark or hash, it cannot
        // possibly be part of the URL scheme. This must be a relative URL, which
        // inherits the (safe) protocol of the base document.
        if (preg_match('![/?#]!', $protocol)) {
          break;
        }

        // Check if this is a disallowed protocol. Per RFC2616, section 3.2.3
        // (URI Comparison) scheme comparison must be case-insensitive.
        if (!isset($allowed_protocols[strtolower($protocol)])) {
          $uri = substr($uri, $colon_position + 1);
        }
      }
    } while ($before !== $uri);
    return $this->escape($uri);
  }

  /**
   * Expands the provided array into HTML attributes.
   *
   * @param array $attributes The attributes
   *
   * @return string
   */
  public function attributes(array $attributes): string {
    foreach ($attributes as $attribute => &$data) {
      $data = implode(' ', (array) $data);
      $data = $attribute . '="' . $this->escape($data) . '"';
    }

    return $attributes ? ' ' . implode(' ', $attributes) : '';
  }

  /**
   * This is a shortcut to throw an exception of type TemplateError that the
   * parent caller can catch. You will probably never need to use this method,
   * but this is an easy way to throw an error if your template cannot proceed
   * and you want to terminate and report it to the parent callers.
   *
   * @param string $error_message The error nessage
   * @param int $error_code The error code
   *
   * @throws TemplateError
   */
  public function error(string $error_message, int $error_code = 0): void {
    throw new TemplateError($error_message, $error_code);
  }

  /**
   * Cast to string. Always returns a blank string.
   *
   * @return string Blank string
   */
  public function __toString(): string {
    return '';
  }

  /**
   * Silently discard all attempts to set object properties.
   *
   * @param mixed $name The name
   * @param mixed $value The value
   * @return void
   */
  public function __set($name, $value): void {
  }

  /**
   * Silently fail all attempts to inspect any object properties.
   *
   * @param mixed $name The name
   * @return bool Status
   */
  public function __isset($name) {
    return false;
  }

  /**
   * Return an empty string when attempted to fetch object properties. This is
   * to discourage bypassing the ArrayAccess pattern.
   *
   * @param mixed $name The name
   * @return string Blank string
   */
  public function __get($name) {
    return '';
  }
}


1			<?php
2
3			namespace Ayesh\PHPTemplate;
4
5			use Ayesh\PHPTemplate\Exception\BadMethodCallException;
6			use Ayesh\PHPTemplate\Exception\TemplateError;
7			use Ayesh\PHPTemplate\Exception\TemplateNotFound;
8
9			final class PHPTemplate implements \ArrayAccess {
10
11			/**
12			* @var array Raw user-provided variables.
13			*/
14			private $vars;
15
16			/**
17			* @var string Template file path.
18			*/
19			private $template_file;
20
21			/**
22			* @var array Allowed url protocols.
23			*/
24			private const ALLOWED_URL_PROTOCOLS = [
25			'http',
26			'https',
27			'ftp'
28			];
29
30			public function __construct(string $template_file = null, array $vars = []) {
31			$this->template_file = $template_file;
32			$this->set($vars);
33			}
34
35			/**
36			* Set view data. This overwrites existing variables.
37			*
38			* @param array $vars The view data
39			* @return void
40			*/
41			public function set(array $vars = []): void {
42			$this->vars = $vars;
43			}
44
45			/**
46			* Render template.
47			*
48			* @param array\|null $vars The view data. If not provided, variables set in a
49			* provious set() call or the constructor will be used.
50			* @return string Rendered template.
51			* @throws \Throwable
52			*/
53			public function render(array $vars = null): string {
54			if (empty($this->template_file)) {
55			throw new BadMethodCallException('Calls to render() method is illegal when a template path is not set.');
56			}
57			if (!file_exists($this->template_file)) {
58			throw new TemplateNotFound(sprintf('Template %s could not be loaded.', $this->template_file));
59			}
60
61			if (null !== $vars) {
62			$this->set($vars);
63			}
64
65			return trim(self::renderTemplate($this->template_file, $this));
66			}
67
68			/**
69			* Render template.
70			*
71			* @param string $path The path to the template file.
72			* @param PHPTemplate $v The PHPTemplate instance
73			* @return string The rendered content
74			* @throws \Throwable
75			*/
76			private static function renderTemplate(string $path, PHPTemplate $v): string {
77			ob_start();
78			try {
79			/** @noinspection PhpIncludeInspection */
80			include $path;
81			} catch (\Throwable $exception) {
82			ob_end_clean();
83			throw $exception;
84			}
85
86			return ob_get_clean();
87			}
88
89			/**
90			* Get view data by key name WITHOUT applying any sanitization filters. Use
91			* array access pattern (e.g $v['var']) to benefit from automatic string
92			* sanitization functions.
93			*
94			* @param string $key The key of the user-provided to variable to fetch.
95			* @return mixed\|null The raw value, or null if not set.
96			*/
97			public function get(string $key) {
98			return $this->vars[$key] ?? NULL;
99			}
100
101			/**
102			* Check whether an offset exists.
103			*
104			* @param string $offset An offset to check for
105			* @return bool Returns true if the offset exists and is not null. False otherwise.
106			*/
107			public function offsetExists($offset): bool {
108			return isset($this->vars[$offset]);
109			}
110
111			/**
112			* Retrieve an offset from the variables, with sanitization filters applied.
113			*
114			* When retrieving variables, the first character is matched against a list
115			* of sanitization techniques provided by this library.
116			*
117			* If the variable starts with a colon (":"), it will be sanitized to be used
118			* as a URL, with all dangerous protocol neatralized.
119			*
120			* The exclaimation character marks the variable must be returned as-is. This
121			* will still make sure it's a string, but it wil not strip any dangerous
122			* HTML and other characters. This is useful if you want to run different
123			* sanitizations functionson the raw variable and want the lubrary to stay
124			* away.
125			*
126			* If the variable has no special character prefix, it will be sanitized with
127			* HTML, as in no HTML will be intepreted by the browser.
128			*
129			* @param string $offset The offset to retrieve.
130			* @return mixed Returns the value at specified offset, with the sanitization
131			* filters applied based on the way their were asked.
132			*/
133			public function offsetGet($offset) {
134			$first_char = $offset[0];
135
136			switch ($first_char) {
137			case ':':
138			return $this->url($this->getVar(substr($offset, 1)));
139
140			case '!':
141			return $this->getVar(substr($offset, 1));
142			default:
143			return $this->escape($this->getVar($offset));
144			}
145			}
146
147			/**
148			* Assign a value to the specified offset.
149			*
150			* @param string $offset The offset to assign the value to
151			* @param mixed $value The value to set
152			* @return void
153			*/
154			public function offsetSet($offset, $value): void {
155			$this->vars[$offset] = $value;
156			}
157
158			/**
159			* Unset an offset.
160			*
161			* @param string $offset The offset to unset.
162			* @return void
163			*/
164			public function offsetUnset($offset): void {
165			unset($this->vars[$offset]);
166			}
167
168			private function getVar(string $offset): string {
169			if (isset($this->vars[$offset]) && \is_scalar($this->vars[$offset]) && !\is_bool($this->vars[$offset])) {
170			return $this->vars[$offset];
171			}
172			return '';
173			}
174
175			/**
176			* Html encoding.
177			*
178			* Escapes the provided literal string to make sure it does not contain
179			* anything that would be interpreted as HTML. You can also use this escape
180			* method inside HTML attributes as it would also convert single and double
181			* quotes to HTML entities.
182			*
183			* @param string $input The value to encode
184			* @return string The html encoded value
185			*/
186			public function escape(string $input): string {
187			return \htmlspecialchars($input, \ENT_QUOTES \| \ENT_SUBSTITUTE, 'UTF-8');
188			}
189
190			/**
191			* URL encoding.
192			*
193			* Sanitizes the provided URL making sure it only contains relative paths,
194			* or URIs whose protocol http://, https://, or ftp://. Any other protocols
195			* such as javascript: will be removed.
196			*
197			* @param string $uri The url
198			* @return string The url encoded string
199			*/
200			public function url(string $uri): string {
201			$allowed_protocols = array_flip(static::ALLOWED_URL_PROTOCOLS);
202
203			// Iteratively remove any invalid protocol found.
204			// Borrowed from Drupal.
205			do {
206			$before = $uri;
207			$colon_position = strpos($uri, ':');
208			if ($colon_position > 0) {
209
210			// We found a colon, possibly a protocol. Verify.
211			$protocol = substr($uri, 0, $colon_position);
212
213			// If a colon is preceded by a slash, question mark or hash, it cannot
214			// possibly be part of the URL scheme. This must be a relative URL, which
215			// inherits the (safe) protocol of the base document.
216			if (preg_match('![/?#]!', $protocol)) {
217			break;
218			}
219
220			// Check if this is a disallowed protocol. Per RFC2616, section 3.2.3
221			// (URI Comparison) scheme comparison must be case-insensitive.
222			if (!isset($allowed_protocols[strtolower($protocol)])) {
223			$uri = substr($uri, $colon_position + 1);
224			}
225			}
226			} while ($before !== $uri);
227			return $this->escape($uri);
228			}
229
230			/**
231			* Expands the provided array into HTML attributes.
232			*
233			* @param array $attributes The attributes
234			*
235			* @return string
236			*/
237			public function attributes(array $attributes): string {
238			foreach ($attributes as $attribute => &$data) {
239			$data = implode(' ', (array) $data);
240			$data = $attribute . '="' . $this->escape($data) . '"';
241			}
242
243			return $attributes ? ' ' . implode(' ', $attributes) : '';
244			}
245
246			/**
247			* This is a shortcut to throw an exception of type TemplateError that the
248			* parent caller can catch. You will probably never need to use this method,
249			* but this is an easy way to throw an error if your template cannot proceed
250			* and you want to terminate and report it to the parent callers.
251			*
252			* @param string $error_message The error nessage
253			* @param int $error_code The error code
254			*
255			* @throws TemplateError
256			*/
257			public function error(string $error_message, int $error_code = 0): void {
258			throw new TemplateError($error_message, $error_code);
259			}
260
261			/**
262			* Cast to string. Always returns a blank string.
263			*
264			* @return string Blank string
265			*/
266			public function __toString(): string {
267			return '';
268			}
269
270			/**
271			* Silently discard all attempts to set object properties.
272			*
273			* @param mixed $name The name
274			* @param mixed $value The value
275			* @return void
276			*/
277			public function __set($name, $value): void {
278			}
279
280			/**
281			* Silently fail all attempts to inspect any object properties.
282			*
283			* @param mixed $name The name
284			* @return bool Status
285			*/
286			public function __isset($name) {
287			return false;
288			}
289
290			/**
291			* Return an empty string when attempted to fetch object properties. This is
292			* to discourage bypassing the ArrayAccess pattern.
293			*
294			* @param mixed $name The name
295			* @return string Blank string
296			*/
297			public function __get($name) {
298			return '';
299			}
300			}
301

Ayesh / PHPTemplate

PHPTemplate::offsetExists() A last analyzed 2020-01-01 00:38 UTC

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PHPTemplate::offsetExists() A
last analyzed 2020-01-01 00:38 UTC