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by Alexander

created 2020-06-01 20:54 UTC

Aliases::getAll() A

↳ Parent: Aliases

Complexity

Conditions	2
Paths	2

Size

Total Lines	7
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	2

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	2
eloc	4
c	1
b	0
f	0
nc	2
nop	0
dl	0
loc	7
ccs	5
cts	5
cp	1
crap	2
rs	10

<?php

namespace Yiisoft\Aliases;

final class Aliases
{
    private array $aliases = [];

    /**
     * @param array $config
     * @throws \InvalidArgumentException if $path is an invalid alias.
     * @see set()
     * @see get()
     */
    public function __construct(array $config = [])
    {
        foreach ($config as $alias => $path) {
            $this->set($alias, $path);
        }
    }

    /**
     * Magic setter to enable simple aliases configuration.
     * @param string $name
     * @param string $value
     */
    public function __set(string $name, string $value): void
    {
        $this->set($name, $value);
    }

    /**
     * Registers a path alias.
     *
     * A path alias is a short name representing a long path (a file path, a URL, etc.)
     * For example, we use '@yii' as the alias of the path to the Yii framework directory.
     *
     * A path alias must start with the character '@' so that it can be easily differentiated
     * from non-alias paths.
     *
     * Note that this method does not check if the given path exists or not. All it does is
     * to associate the alias with the path.
     *
     * Any trailing '/' and '\' characters in the given path will be trimmed.
     *
     * See the [guide article on aliases](guide:concept-aliases) for more information.
     *
     * @param string $alias the alias name (e.g. "@yii"). It must start with a '@' character.
     * It may contain the forward slash '/' which serves as boundary character when performing
     * alias translation by [[get()]].
     * @param string $path the path corresponding to the alias. If this is null, the alias will
     * be removed. Trailing '/' and '\' characters will be trimmed. This can be
     *
     * - a directory or a file path (e.g. `/tmp`, `/tmp/main.txt`)
     * - a URL (e.g. `http://www.yiiframework.com`)
     * - a path alias (e.g. `@yii/base`). In this case, the path alias will be converted into the
     *   actual path first by calling [[get()]].
     *
     * @throws \InvalidArgumentException if $path is an invalid alias.
     * @see get()
     */
    public function set(string $alias, ?string $path): void
    {
        if (!$this->isAlias($alias)) {
            $alias = '@' . $alias;
        }
        $pos = strpos($alias, '/');
        $root = $pos === false ? $alias : substr($alias, 0, $pos);
        if ($path !== null) {
            if (!array_key_exists($root, $this->aliases)) {
                if ($pos === false) {
                    $this->aliases[$root] = $path;
                } else {
                    $this->aliases[$root] = [$alias => $path];
                }
            } elseif (\is_string($this->aliases[$root])) {
                if ($pos === false) {
                    $this->aliases[$root] = $path;
                } else {
                    $this->aliases[$root] = [
                        $alias => $path,
                        $root => $this->aliases[$root],
                    ];
                }
            } else {
                $this->aliases[$root][$alias] = $path;
                krsort($this->aliases[$root]);
            }
        } elseif (!array_key_exists($root, $this->aliases)) {
            if (\is_array($this->aliases[$root])) {
                unset($this->aliases[$root][$alias]);
            } elseif ($pos === false) {
                unset($this->aliases[$root]);
            }
        }
    }

    /**
     * Translates a path alias into an actual path.
     *
     * The translation is done according to the following procedure:
     *
     * 1. If the given alias does not start with '@', it is returned back without change;
     * 2. Otherwise, look for the longest registered alias that matches the beginning part
     *    of the given alias. If it exists, replace the matching part of the given alias with
     *    the corresponding registered path.
     * 3. Throw an exception or return false, depending on the `$throwException` parameter.
     *
     * For example, by default '@yii' is registered as the alias to the Yii framework directory,
     * say '/path/to/yii'. The alias '@yii/web' would then be translated into '/path/to/yii/web'.
     *
     * If you have registered two aliases '@foo' and '@foo/bar'. Then translating '@foo/bar/config'
     * would replace the part '@foo/bar' (instead of '@foo') with the corresponding registered path.
     * This is because the longest alias takes precedence.
     *
     * However, if the alias to be translated is '@foo/barbar/config', then '@foo' will be replaced
     * instead of '@foo/bar', because '/' serves as the boundary character.
     *
     * Note, this method does not check if the returned path exists or not.
     *
     * See the [guide article on aliases](guide:concept-aliases) for more information.
     *
     * @param string $alias the alias to be translated.
     * @return string the path corresponding to the alias.
     * @throws \InvalidArgumentException if the root alias is not previously registered.
     * @see setAlias()
     */
    public function get(string $alias): string
    {
        if (!$this->isAlias($alias)) {
            return $alias;
        }

        $result = $this->findAlias($alias);

        if (\is_array($result)) {
            $parts = $this->findAlias($result['path']);
            if ($parts === null) {
                return $result['path'];
            }

            return $this->get($parts['path']);
        }

        throw new \InvalidArgumentException("Invalid path alias: $alias");
    }

    /**
     * Returns the root alias part of a given alias.
     * A root alias is an alias that has been registered via [[setAlias()]] previously.
     * If a given alias matches multiple root aliases, the longest one will be returned.
     * @param string $alias the alias
     * @return string the root alias, or null if no root alias is found
     */
    public function getRoot(string $alias): ?string
    {
        $result = $this->findAlias($alias);
        if (\is_array($result)) {
            $result = $result['root'];
        }

        return $result;
    }

    private function findAlias(string $alias): ?array
    {
        $pos = strpos($alias, '/');
        $root = $pos === false ? $alias : substr($alias, 0, $pos);

        if (array_key_exists($root, $this->aliases)) {
            if (\is_string($this->aliases[$root])) {
                return [
                    'root' => $root,
                    'path' => $pos === false
                        ? $this->aliases[$root]
                        : $this->aliases[$root] . substr($alias, $pos)
                ];
            }

            foreach ($this->aliases[$root] as $name => $path) {
                if (strpos($alias . '/', $name . '/') === 0) {
                    return [
                        'root' => $name,
                        'path' => $path . substr($alias, strlen($name))
                    ];
                }
            }
        }

        return null;
    }

    /**
     * Returns all path aliases translated into an actual paths.
     * @return array Actual paths indexed by alias name.
     */
    public function getAll(): array
    {
        $result = [];
        foreach ($this->aliases as $name => $path) {
            $result[$name] = $this->get($path);
        }
        return $result;
    }

    private function isAlias(string $alias): bool
    {
        return !strncmp($alias, '@', 1);
    }
}


1		<?php
2
3		namespace Yiisoft\Aliases;
4
5		final class Aliases
6		{
7		private array $aliases = [];
8
9		/**
10		* @param array $config
11		* @throws \InvalidArgumentException if $path is an invalid alias.
12		* @see set()
13		* @see get()
14		*/
15	7	public function __construct(array $config = [])
16		{
17	7	foreach ($config as $alias => $path) {
18	3	$this->set($alias, $path);
19		}
20	7	}
21
22		/**
23		* Magic setter to enable simple aliases configuration.
24		* @param string $name
25		* @param string $value
26		*/
27	1	public function __set(string $name, string $value): void
28		{
29	1	$this->set($name, $value);
30	1	}
31
32		/**
33		* Registers a path alias.
34		*
35		* A path alias is a short name representing a long path (a file path, a URL, etc.)
36		* For example, we use '@yii' as the alias of the path to the Yii framework directory.
37		*
38		* A path alias must start with the character '@' so that it can be easily differentiated
39		* from non-alias paths.
40		*
41		* Note that this method does not check if the given path exists or not. All it does is
42		* to associate the alias with the path.
43		*
44		* Any trailing '/' and '\' characters in the given path will be trimmed.
45		*
46		* See the [guide article on aliases](guide:concept-aliases) for more information.
47		*
48		* @param string $alias the alias name (e.g. "@yii"). It must start with a '@' character.
49		* It may contain the forward slash '/' which serves as boundary character when performing
50		* alias translation by [[get()]].
51		* @param string $path the path corresponding to the alias. If this is null, the alias will
52		* be removed. Trailing '/' and '\' characters will be trimmed. This can be
53		*
54		* - a directory or a file path (e.g. `/tmp`, `/tmp/main.txt`)
55		* - a URL (e.g. `http://www.yiiframework.com`)
56		* - a path alias (e.g. `@yii/base`). In this case, the path alias will be converted into the
57		* actual path first by calling [[get()]].
58		*
59		* @throws \InvalidArgumentException if $path is an invalid alias.
60		* @see get()
61		*/
62	7	public function set(string $alias, ?string $path): void
63		{
64	7	if (!$this->isAlias($alias)) {
65	2	$alias = '@' . $alias;
66		}
67	7	$pos = strpos($alias, '/');
68	7	$root = $pos === false ? $alias : substr($alias, 0, $pos);
69	7	if ($path !== null) {
70	7	if (!array_key_exists($root, $this->aliases)) {
71	7	if ($pos === false) {
72	6	$this->aliases[$root] = $path;
73		} else {
74	7	$this->aliases[$root] = [$alias => $path];
75		}
76	3	} elseif (\is_string($this->aliases[$root])) {
77	2	if ($pos === false) {
78		$this->aliases[$root] = $path;
79		} else {
80	2	$this->aliases[$root] = [
81	2	$alias => $path,
82	2	$root => $this->aliases[$root],
83		];
84		}
85		} else {
86	1	$this->aliases[$root][$alias] = $path;
87	7	krsort($this->aliases[$root]);
88		}
89	1	} elseif (!array_key_exists($root, $this->aliases)) {
90		if (\is_array($this->aliases[$root])) {
91		unset($this->aliases[$root][$alias]);
92		} elseif ($pos === false) {
93		unset($this->aliases[$root]);
94		}
95		}
96	7	}
97
98		/**
99		* Translates a path alias into an actual path.
100		*
101		* The translation is done according to the following procedure:
102		*
103		* 1. If the given alias does not start with '@', it is returned back without change;
104		* 2. Otherwise, look for the longest registered alias that matches the beginning part
105		* of the given alias. If it exists, replace the matching part of the given alias with
106		* the corresponding registered path.
107		* 3. Throw an exception or return false, depending on the `$throwException` parameter.
108		*
109		* For example, by default '@yii' is registered as the alias to the Yii framework directory,
110		* say '/path/to/yii'. The alias '@yii/web' would then be translated into '/path/to/yii/web'.
111		*
112		* If you have registered two aliases '@foo' and '@foo/bar'. Then translating '@foo/bar/config'
113		* would replace the part '@foo/bar' (instead of '@foo') with the corresponding registered path.
114		* This is because the longest alias takes precedence.
115		*
116		* However, if the alias to be translated is '@foo/barbar/config', then '@foo' will be replaced
117		* instead of '@foo/bar', because '/' serves as the boundary character.
118		*
119		* Note, this method does not check if the returned path exists or not.
120		*
121		* See the [guide article on aliases](guide:concept-aliases) for more information.
122		*
123		* @param string $alias the alias to be translated.
124		* @return string the path corresponding to the alias.
125		* @throws \InvalidArgumentException if the root alias is not previously registered.
126		* @see setAlias()
127		*/
128	6	public function get(string $alias): string
129		{
130	6	if (!$this->isAlias($alias)) {
131	4	return $alias;
132		}
133
134	6	$result = $this->findAlias($alias);
135
136	6	if (\is_array($result)) {
137	6	$parts = $this->findAlias($result['path']);
138	6	if ($parts === null) {
139	5	return $result['path'];
140		}
141
142	4	return $this->get($parts['path']);
143		}
144
145	2	throw new \InvalidArgumentException("Invalid path alias: $alias");
146		}
147
148		/**
149		* Returns the root alias part of a given alias.
150		* A root alias is an alias that has been registered via [[setAlias()]] previously.
151		* If a given alias matches multiple root aliases, the longest one will be returned.
152		* @param string $alias the alias
153		* @return string the root alias, or null if no root alias is found
154		*/
155	2	public function getRoot(string $alias): ?string
156		{
157	2	$result = $this->findAlias($alias);
158	2	if (\is_array($result)) {
159	2	$result = $result['root'];
160		}
161
162	2	return $result;
163		}
164
165	7	private function findAlias(string $alias): ?array
166		{
167	7	$pos = strpos($alias, '/');
168	7	$root = $pos === false ? $alias : substr($alias, 0, $pos);
169
170	7	if (array_key_exists($root, $this->aliases)) {
171	7	if (\is_string($this->aliases[$root])) {
172		return [
173	5	'root' => $root,
174		'path' => $pos === false
175	4	? $this->aliases[$root]
176	5	: $this->aliases[$root] . substr($alias, $pos)
177		];
178		}
179
180	3	foreach ($this->aliases[$root] as $name => $path) {
181	3	if (strpos($alias . '/', $name . '/') === 0) {
182		return [
183	3	'root' => $name,
184	3	'path' => $path . substr($alias, strlen($name))
185		];
186		}
187		}
188		}
189
190	5	return null;
191		}
192
193		/**
194		* Returns all path aliases translated into an actual paths.
195		* @return array Actual paths indexed by alias name.
196		*/
197	1	public function getAll(): array
198		{
199	1	$result = [];
200	1	foreach ($this->aliases as $name => $path) {
201	1	$result[$name] = $this->get($path);
202		}
203	1	return $result;
204		}
205
206	7	private function isAlias(string $alias): bool
207		{
208	7	return !strncmp($alias, '@', 1);
209		}
210		}
211

yiisoft / aliases

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