Failed Conditions
Push — complex_graph ( acfdbf...ffa5e4 )
by Donald
04:25 queued 01:50
created

Key::splitPossessions()   A

Complexity

Conditions 2
Paths 2

Size

Total Lines 3
Code Lines 1

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
eloc 1
c 0
b 0
f 0
dl 0
loc 3
rs 10
cc 2
nc 2
nop 1
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<?php namespace Chekote\NounStore;
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use InvalidArgumentException;
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class Key
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{
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    use Singleton;
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    const ORDINAL_ST = 'st';
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    const ORDINAL_ND = 'nd';
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    const ORDINAL_RD = 'rd';
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    const ORDINAL_TH = 'th';
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    protected static $ordinals = [
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        0 => self::ORDINAL_TH,
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        1 => self::ORDINAL_ST,
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        2 => self::ORDINAL_ND,
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        3 => self::ORDINAL_RD,
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        4 => self::ORDINAL_TH,
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        5 => self::ORDINAL_TH,
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        6 => self::ORDINAL_TH,
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        7 => self::ORDINAL_TH,
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        8 => self::ORDINAL_TH,
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        9 => self::ORDINAL_TH,
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    ];
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    /**
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     * Builds a key from it's separate key and index values.
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     *
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     * @example buildKey("Item", null): "Item"
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     * @example buildKey("Item", 0): "1st Item"
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     * @example buildKey("Item", 1): "2nd Item"
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     * @example buildKey("Item", 2): "3rd Item"
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     *
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     * @param  string                   $key   The key to check.
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     * @param  int|null                 $index The index (zero indexed) value for the key. If not specified, the method
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     *                                         will not add an index notation to the key.
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     * @throws InvalidArgumentException if $index is less than -1. Note: It should really be zero or higher, but this
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     *                                        method does not assert that. The error is bubbling up from getOrdinal()
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     * @return string                   the key with the index, or just the key if index is null.
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     */
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    public function build($key, $index)
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    {
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        if ($index === null) {
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            return $key;
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        }
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        $nth = $index + 1;
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        return $nth . $this->getOrdinal($nth) . ' ' . $key;
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    }
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    /**
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     * Provides the ordinal notation for the specified nth number.
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     *
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     * @param  int                      $nth the number to determine the ordinal for
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     * @throws InvalidArgumentException if $nth is not a positive number.
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     * @return string                   the ordinal
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     */
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    public function getOrdinal($nth)
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    {
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        if ($nth < 0) {
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            throw new InvalidArgumentException('$nth must be a positive number');
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        }
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        return $nth > 9 && $nth < 20 ? self::ORDINAL_TH : self::$ordinals[substr($nth, -1)];
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    }
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    /**
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     * Parses a key into dot-notation.
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     *
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     * @example parseKey("Item"): "Item"
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     * @example parseKey("1st Item"): "Item.0"
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     * @example parseKey("2nd Item"): "Item.1"
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     * @example parseKey("3rd Item"): "Item.2"
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     *
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     * @param  string                   $key the key to parse.
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     * @throws InvalidArgumentException if the key syntax is invalid.
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     * @return string                   the dot-notation string.
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     */
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    public function parse($key)
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    {
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        if (!preg_match("/^(([1-9][0-9]*)(?:st|nd|rd|th) )?([^']+)$/", $key, $matches)) {
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            throw new InvalidArgumentException('Key syntax is invalid');
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        }
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        // @todo use null coalescing operator when upgrading to PHP 7
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        $index = isset($matches[2]) && $matches[2] !== '' ? $matches[2] - 1 : null;
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        $key = $matches[3];
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        return $index !== null ? "$key.$index" : $key;
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    }
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    /**
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     * Splits a possessive key into its separate nouns.
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     *
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     * @example splitPossessions("Customer's Car"): ['Customer', 'Car']
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     * @example splitPossessions("8th Customer's Car"): ['8th Customer', 'Car']
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     * @example splitPossessions("Customer's 2nd Car"): ['Customer', '2nd Car']
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     * @example splitPossessions("7th Customer's 4th Car"): ['7th Customer', '4th Car']
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     * @example splitPossessions("7th Customer's 4th Car's 2nd Wheel"): ['7th Customer', '4th Car', '2nd Wheel']
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     *
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     * @param  string   $key the possessive key to parse
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     * @return string[] an array of nouns
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     */
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    protected function splitPossessions($key)
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    {
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        return ($nouns = preg_split('/' . self::POSSESSION . '/', $key)) ? $nouns : [];
0 ignored issues
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Bug introduced by
The constant Chekote\NounStore\Key::POSSESSION was not found. Maybe you did not declare it correctly or list all dependencies?
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Bug Best Practice introduced by
The expression return $nouns = preg_spl...key) ? $nouns : array() returns an array which contains values of type array which are incompatible with the documented value type string.
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    }
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}
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