ConsoleIO::setOutputLevel() - Code Metrics - Inspection of "V2" - ekowabaka/clearice - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#2)

by James Ekow Abaka

created 2017-09-23 02:20 UTC

ConsoleIO::setOutputLevel() A

↳ Parent: ConsoleIO

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	3
CRAP Score	1

Importance

Changes

Metric	Value
dl	0
loc	4
ccs	3
cts	3
cp	1
rs	10
c	0
b	0
f	0
cc	1
eloc	2
nc	1
nop	1
crap	1

<?php

/*
 * ClearIce CLI Argument Parser
 * Copyright (c) 2012-2015 James Ekow Abaka Ainooson
 * 
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
 * 
 * @author James Ainooson <[email protected]>
 * @copyright Copyright 2012-2014 James Ekow Abaka Ainooson
 * @license MIT
 */

namespace clearice;

/**
 * The ClearIce class forms the entry for the entire library. 
 * All operations of the library are done through this class. Being static, 
 * the class contains sigleton objects with which it performs all its operations.
 */
class ConsoleIO
{

    /**
     * Least output level.
     * At this level clearice is expected to be mute. Nothing would be outputted
     * to any of the streams.
     * @var int
     */
    const OUTPUT_LEVEL_0 = 0;

    /**
     * Output level 1
     * @var int
     */
    const OUTPUT_LEVEL_1 = 1;

    /**
     * Output level 2
     * @var int
     */
    const OUTPUT_LEVEL_2 = 2;

    /**
     * Output level 3.
     * At this level clearice is expected not to filter any output. Everything
     * that is sent to ClearIce would be outputted to the streams.
     * @var int
     */
    const OUTPUT_LEVEL_3 = 3;

    /**
     * The default output level of the ClearIce library.
     * @var int
     */
    private $defaultOutputLevel = self::OUTPUT_LEVEL_1;

    /**
     * An array to hold the output level stack.
     * @var array
     */
    private $outputLevelStack = array();

    /**
     * An array of the three streams used primarily for I/O. These are the
     * standard output stream, the standard input stream and the error stream.
     * Being an associative array, this property presents the three streams
     * through its output, input and error keys.
     * 
     * @var array
     */
    private $streams = array();

    /**
     * The URLs of the various streams used for I/O. This variable stores these
     * URLs under the input, output and error streams respectively. 
     * 
     * @see ClearIce::$streams
     * @var array
     */
    private $streamUrls = array(
        'input' => 'php://stdin',
        'output' => 'php://stdout',
        'error' => 'php://stderr'
    );

    /**
     * A function for getting answers to questions from users interractively.
     * This function takes the question and an optional array of parameters. 
     * The question is a regular string and the array provides extra information
     * about the question being asked.
     * 
     * The array takes the following parameters
     * 
     * **answers**  
     * An array of posible answers to the question. Once this array is available
     * the user would be expected to provide an answer which is specifically in
     * the list. Any other answer would be rejected. The library would print
     * out all the possible answers so the user is aware of which answers
     * are valid.
     * 
     * **default**  
     * A default answer which should be used in case the user does not supply an
     * answer. The library would make the user aware of this default by placing
     * it in square brackets after the question.
     * 
     * **required**  
     * If this flag is set, the user would be required to provide an answer. A
     * blank answer would be rejected.
     * 
     * @param string $question The question you want to ask
     * @param array  $params   An array of options that this function takes.
     * @return string The response provided by the user to the prompt.
     */
    public function getResponse($question, $params = array())
    {
        $prompt = $question;
        
        $answers = $params['answers'] ?? [];
        $default = $params['default'] ?? '';
        $required = $params['required'] ?? false;
        
        if (count($answers ?? []) > 0) {
            $prompt .= " (" . implode("/", $answers) . ")";
        }

        $this->output($prompt . " [{$default}]: ");
        $response = str_replace(array("\n", "\r"), array("", ""), $this->input());

        if ($response == "" && $required === true && $default == '') {
            $this->error("A value is required.\n");
            return $this->getResponse($question, $params);
        } else if ($response == "" && $required === true && $default != '') {
            return $default;
        } else if ($response == "") {
            return $default;
        } else {
            if (count($answers) == 0) {
                return $response;
            }
            foreach ($answers as $answer) {
                if (strtolower($answer) == strtolower($response)) {
                    return strtolower($answer);
                }
            }
            $this->error("Please provide a valid answer.\n");
            return $this->getResponse($question, $params);
        }
    }

    /**
     * Set the URL of any of the streams used by ClearIce.
     * ClearIce maintains three different streams for its I/O operations. The
     * `output` stream is used for output, the `error` stream is used for errors 
     * and the `input` stream is used for input. The `output` and `error` streams
     * are represented by the standard output and standard error streams 
     * respectively. The `input` stream on the other hand is represented by the 
     * standard input stream by default. 
     * 
     * Streams could be any valid PHP stream URL.
     * Example to write all output to a file you could set.
     * 
     * ````php
     * <?php
     * ClearIce::setStreamUrl('output', '/path/to/file');
     * ClearIce::setStreamUrl('error', '/path/to/file');
     * ````
     * 
     * Once a new URL is set, any old streams are closed and the new one is 
     * opened in its place immediately the stream is accessed.
     * 
     * @param string $type The type of stream to set a URL for. The value of this 
     *                     could either be 'error', 'input' or 'output'.
     * 
     * @param string $url  The URL of the stream. Based on the type of stream
     *                     being requested, the right kind of permissions must
     *                     be set. For instance 
     */
    public function setStreamUrl($type, $url)
    {
        $this->streamUrls[$type] = $url;
        unset($this->streams[$type]);
    }

    /**
     * Write a string to the output stream. 
     * If an output stream is not defined this method writes to the standard 
     * output (the console) by default.
     * 
     * @param string $string
     */
    public function output($string, $outputLevel = self::OUTPUT_LEVEL_1, $stream = 'output')
    {
        if ($outputLevel <= $this->defaultOutputLevel) {
            fputs($this->getStream($stream), $string);
        }
    }

    /**
     * Write a string to the error stream. 
     * If an error stream is not defined this method writes to the standard 
     * error (the console) by default.
     * 
     * @param string $string
     */
    public function error($string, $outputLevel = self::OUTPUT_LEVEL_1)
    {
        $this->output($string, $outputLevel, 'error');
    }

    /**
     * Set the output level of the ClearIce output streams (including the error)
     * stream. 
     * 
     * @param int $outputLevel
     */
    public function setOutputLevel($outputLevel)
    {
        $this->defaultOutputLevel = $outputLevel;
    }

    /**
     * Returns the current output level of the CliearIce library.
     * @return int
     */
    public function getOutputLevel()
    {
        return $this->defaultOutputLevel;
    }

    /**
     * Push an output level unto the output level stack.
     * The output level pushed becomes the new output level with which ClearIce
     * would work. The previous level pushed would be automatically restored
     * when the ClearIce::popOutputLevel() method is called. Using the output
     * level stack gives you a convenient way to change the output level 
     * temporarily without having to keep a record of the previous output level.
     * 
     * @param int $outputLevel
     */
    public function pushOutputLevel($outputLevel)
    {
        $this->outputLevelStack[] = $this->getOutputLevel();
        $this->setOutputLevel($outputLevel);
    }

    /**
     * Pop the last output level which was pushed unto the output level stack.
     * This restores the previous output level which was active before the last
     * call to the ClearIce::pushOutputLevel() method. Using the output
     * level stack gives you a convenient way to change the output level 
     * temporarily without having to keep a record of the previous output level.
     * 
     */
    public function popOutputLevel()
    {
        $this->setOutputLevel(array_pop($this->outputLevelStack));
    }

    /**
     * Resets the output level stack.
     * This method clears all items off the output level stack leaving only the
     * current output level.
     */
    public function resetOutputLevel()
    {
        if (count($this->outputLevelStack) > 0) {
            $this->setOutputLevel(reset($this->outputLevelStack));
            $this->outputLevelStack = array();
        }
    }

    /**
     * Reads a line of string from the input stream. 
     * If an input stream is not defined this method reads an input from the 
     * standard input (usually a keyboard) by default.
     * 
     * @todo look into using readline for this in cases where it's available
     * @return string
     */
    public function input()
    {
        return fgets($this->getStream('input'));
    }

    /**
     * Returns a stream resource for a given stream type. 
     * If the stream has not been opened this method opens the stream before 
     * returning the asociated resource. This ensures that there is only one 
     * resource handle to any stream at any given time.
     * 
     * @param string $type
     * @return resource
     */
    private function getStream($type)
    {
        if (!isset($this->streams[$type])) {
            $this->streams[$type] = fopen($this->streamUrls[$type], $type == 'input' ? 'r' : 'w');
        }
        return $this->streams[$type];
    }

}


1		<?php
2
3		/*
4		* ClearIce CLI Argument Parser
5		* Copyright (c) 2012-2015 James Ekow Abaka Ainooson
6		*
7		* Permission is hereby granted, free of charge, to any person obtaining
8		* a copy of this software and associated documentation files (the
9		* "Software"), to deal in the Software without restriction, including
10		* without limitation the rights to use, copy, modify, merge, publish,
11		* distribute, sublicense, and/or sell copies of the Software, and to
12		* permit persons to whom the Software is furnished to do so, subject to
13		* the following conditions:
14		*
15		* The above copyright notice and this permission notice shall be
16		* included in all copies or substantial portions of the Software.
17		*
18		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19		* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20		* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21		* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22		* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23		* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24		* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25		*
26		* @author James Ainooson <[email protected]>
27		* @copyright Copyright 2012-2014 James Ekow Abaka Ainooson
28		* @license MIT
29		*/
30
31		namespace clearice;
32
33		/**
34		* The ClearIce class forms the entry for the entire library.
35		* All operations of the library are done through this class. Being static,
36		* the class contains sigleton objects with which it performs all its operations.
37		*/
38		class ConsoleIO
39		{
40
41		/**
42		* Least output level.
43		* At this level clearice is expected to be mute. Nothing would be outputted
44		* to any of the streams.
45		* @var int
46		*/
47		const OUTPUT_LEVEL_0 = 0;
48
49		/**
50		* Output level 1
51		* @var int
52		*/
53		const OUTPUT_LEVEL_1 = 1;
54
55		/**
56		* Output level 2
57		* @var int
58		*/
59		const OUTPUT_LEVEL_2 = 2;
60
61		/**
62		* Output level 3.
63		* At this level clearice is expected not to filter any output. Everything
64		* that is sent to ClearIce would be outputted to the streams.
65		* @var int
66		*/
67		const OUTPUT_LEVEL_3 = 3;
68
69		/**
70		* The default output level of the ClearIce library.
71		* @var int
72		*/
73		private $defaultOutputLevel = self::OUTPUT_LEVEL_1;
74
75		/**
76		* An array to hold the output level stack.
77		* @var array
78		*/
79		private $outputLevelStack = array();
80
81		/**
82		* An array of the three streams used primarily for I/O. These are the
83		* standard output stream, the standard input stream and the error stream.
84		* Being an associative array, this property presents the three streams
85		* through its output, input and error keys.
86		*
87		* @var array
88		*/
89		private $streams = array();
90
91		/**
92		* The URLs of the various streams used for I/O. This variable stores these
93		* URLs under the input, output and error streams respectively.
94		*
95		* @see ClearIce::$streams
96		* @var array
97		*/
98		private $streamUrls = array(
99		'input' => 'php://stdin',
100		'output' => 'php://stdout',
101		'error' => 'php://stderr'
102		);
103
104		/**
105		* A function for getting answers to questions from users interractively.
106		* This function takes the question and an optional array of parameters.
107		* The question is a regular string and the array provides extra information
108		* about the question being asked.
109		*
110		* The array takes the following parameters
111		*
112		* answers
113		* An array of posible answers to the question. Once this array is available
114		* the user would be expected to provide an answer which is specifically in
115		* the list. Any other answer would be rejected. The library would print
116		* out all the possible answers so the user is aware of which answers
117		* are valid.
118		*
119		* default
120		* A default answer which should be used in case the user does not supply an
121		* answer. The library would make the user aware of this default by placing
122		* it in square brackets after the question.
123		*
124		* required
125		* If this flag is set, the user would be required to provide an answer. A
126		* blank answer would be rejected.
127		*
128		* @param string $question The question you want to ask
129		* @param array $params An array of options that this function takes.
130		* @return string The response provided by the user to the prompt.
131		*/
132	9	public function getResponse($question, $params = array())
133		{
134	9	$prompt = $question;
135
136	9	$answers = $params['answers'] ?? [];
137	9	$default = $params['default'] ?? '';
138	9	$required = $params['required'] ?? false;
139
140	9	if (count($answers ?? []) > 0) {
141	4	$prompt .= " (" . implode("/", $answers) . ")";
142		}
143
144	9	$this->output($prompt . " [{$default}]: ");
145	9	$response = str_replace(array("\n", "\r"), array("", ""), $this->input());
146
147	9	if ($response == "" && $required === true && $default == '') {
148	1	$this->error("A value is required.\n");
149	1	return $this->getResponse($question, $params);
150	9	} else if ($response == "" && $required === true && $default != '') {
151	1	return $default;
152	8	} else if ($response == "") {
153	3	return $default;
154		} else {
155	6	if (count($answers) == 0) {
156	4	return $response;
157		}
158	3	foreach ($answers as $answer) {
159	3	if (strtolower($answer) == strtolower($response)) {
160	3	return strtolower($answer);
161		}
162		}
163	2	$this->error("Please provide a valid answer.\n");
164	2	return $this->getResponse($question, $params);
165		}
166		}
167
168		/**
169		* Set the URL of any of the streams used by ClearIce.
170		* ClearIce maintains three different streams for its I/O operations. The
171		* `output` stream is used for output, the `error` stream is used for errors
172		* and the `input` stream is used for input. The `output` and `error` streams
173		* are represented by the standard output and standard error streams
174		* respectively. The `input` stream on the other hand is represented by the
175		* standard input stream by default.
176		*
177		* Streams could be any valid PHP stream URL.
178		* Example to write all output to a file you could set.
179		*
180		* ````php
181		* <?php
182		* ClearIce::setStreamUrl('output', '/path/to/file');
183		* ClearIce::setStreamUrl('error', '/path/to/file');
184		* ````
185		*
186		* Once a new URL is set, any old streams are closed and the new one is
187		* opened in its place immediately the stream is accessed.
188		*
189		* @param string $type The type of stream to set a URL for. The value of this
190		* could either be 'error', 'input' or 'output'.
191		*
192		* @param string $url The URL of the stream. Based on the type of stream
193		* being requested, the right kind of permissions must
194		* be set. For instance
195		*/
196	19	public function setStreamUrl($type, $url)
197		{
198	19	$this->streamUrls[$type] = $url;
199	19	unset($this->streams[$type]);
200	19	}
201
202		/**
203		* Write a string to the output stream.
204		* If an output stream is not defined this method writes to the standard
205		* output (the console) by default.
206		*
207		* @param string $string
208		*/
209	17	public function output($string, $outputLevel = self::OUTPUT_LEVEL_1, $stream = 'output')
210		{
211	17	if ($outputLevel <= $this->defaultOutputLevel) {
212	17	fputs($this->getStream($stream), $string);
213		}
214	17	}
215
216		/**
217		* Write a string to the error stream.
218		* If an error stream is not defined this method writes to the standard
219		* error (the console) by default.
220		*
221		* @param string $string
222		*/
223	5	public function error($string, $outputLevel = self::OUTPUT_LEVEL_1)
224		{
225	5	$this->output($string, $outputLevel, 'error');
226	5	}
227
228		/**
229		* Set the output level of the ClearIce output streams (including the error)
230		* stream.
231		*
232		* @param int $outputLevel
233		*/
234	3	public function setOutputLevel($outputLevel)
235		{
236	3	$this->defaultOutputLevel = $outputLevel;
237	3	}
238
239		/**
240		* Returns the current output level of the CliearIce library.
241		* @return int
242		*/
243	2	public function getOutputLevel()
244		{
245	2	return $this->defaultOutputLevel;
246		}
247
248		/**
249		* Push an output level unto the output level stack.
250		* The output level pushed becomes the new output level with which ClearIce
251		* would work. The previous level pushed would be automatically restored
252		* when the ClearIce::popOutputLevel() method is called. Using the output
253		* level stack gives you a convenient way to change the output level
254		* temporarily without having to keep a record of the previous output level.
255		*
256		* @param int $outputLevel
257		*/
258	1	public function pushOutputLevel($outputLevel)
259		{
260	1	$this->outputLevelStack[] = $this->getOutputLevel();
261	1	$this->setOutputLevel($outputLevel);
262	1	}
263
264		/**
265		* Pop the last output level which was pushed unto the output level stack.
266		* This restores the previous output level which was active before the last
267		* call to the ClearIce::pushOutputLevel() method. Using the output
268		* level stack gives you a convenient way to change the output level
269		* temporarily without having to keep a record of the previous output level.
270		*
271		*/
272	1	public function popOutputLevel()
273		{
274	1	$this->setOutputLevel(array_pop($this->outputLevelStack));
275	1	}
276
277		/**
278		* Resets the output level stack.
279		* This method clears all items off the output level stack leaving only the
280		* current output level.
281		*/
282	1	public function resetOutputLevel()
283		{
284	1	if (count($this->outputLevelStack) > 0) {
285	1	$this->setOutputLevel(reset($this->outputLevelStack));
286	1	$this->outputLevelStack = array();
287		}
288	1	}
289
290		/**
291		* Reads a line of string from the input stream.
292		* If an input stream is not defined this method reads an input from the
293		* standard input (usually a keyboard) by default.
294		*
295		* @todo look into using readline for this in cases where it's available
296		* @return string
297		*/
298	9	public function input()
299		{
300	9	return fgets($this->getStream('input'));
301		}
302
303		/**
304		* Returns a stream resource for a given stream type.
305		* If the stream has not been opened this method opens the stream before
306		* returning the asociated resource. This ensures that there is only one
307		* resource handle to any stream at any given time.
308		*
309		* @param string $type
310		* @return resource
311		*/
312	17	private function getStream($type)
313		{
314	17	if (!isset($this->streams[$type])) {
315	17	$this->streams[$type] = fopen($this->streamUrls[$type], $type == 'input' ? 'r' : 'w');
316		}
317	17	return $this->streams[$type];
318		}
319
320		}
321

ekowabaka / clearice

Pull Request — master (#2)

ConsoleIO::setOutputLevel() A

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