1 | <?php |
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2 | |||
3 | //---------------------------------------------------------------------- |
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4 | // |
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5 | // Copyright (C) 2015-2021 Artem Rodygin |
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6 | // |
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7 | // You should have received a copy of the MIT License along with |
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8 | // this file. If not, see <http://opensource.org/licenses/MIT>. |
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9 | // |
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10 | //---------------------------------------------------------------------- |
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11 | |||
12 | namespace Dictionary; |
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13 | |||
14 | /** |
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15 | * Abstract static dictionary of key/value pairs. |
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16 | */ |
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17 | abstract class StaticDictionary implements StaticDictionaryInterface |
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18 | { |
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19 | // Fallback key of the default value to return on non-existing keys. |
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20 | public const FALLBACK = null; |
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21 | |||
22 | /** |
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23 | * @var array Dictionary values (to be overloaded). |
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24 | */ |
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25 | protected static array $dictionary = []; |
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26 | |||
27 | /** |
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28 | * {@inheritdoc} |
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29 | */ |
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30 | 1 | public static function all(): array |
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31 | { |
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32 | 1 | return static::dictionary(); |
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33 | } |
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34 | |||
35 | /** |
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36 | * {@inheritdoc} |
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37 | */ |
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38 | 1 | public static function get($key) |
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39 | { |
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40 | 1 | $dictionary = static::dictionary(); |
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41 | |||
42 | 1 | if (array_key_exists($key, $dictionary)) { |
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43 | 1 | return $dictionary[$key]; |
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44 | } |
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45 | |||
46 | 1 | return static::FALLBACK === null ? null : $dictionary[static::FALLBACK]; |
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47 | |||
48 | } |
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49 | |||
50 | /** |
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51 | * {@inheritdoc} |
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52 | */ |
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53 | 1 | public static function has($key): bool |
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54 | { |
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55 | 1 | return array_key_exists($key, static::dictionary()); |
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56 | } |
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57 | |||
58 | /** |
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59 | * {@inheritdoc} |
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60 | */ |
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61 | 1 | public static function find($value) |
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62 | { |
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63 | 1 | $key = array_search($value, static::dictionary(), true); |
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64 | |||
65 | 1 | return $key === false ? static::FALLBACK : $key; |
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66 | } |
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67 | |||
68 | /** |
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69 | * {@inheritdoc} |
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70 | */ |
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71 | 1 | public static function keys(): array |
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72 | { |
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73 | 1 | return array_keys(static::dictionary()); |
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74 | } |
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75 | |||
76 | /** |
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77 | * {@inheritdoc} |
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78 | */ |
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79 | 1 | public static function values(): array |
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80 | { |
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81 | 1 | return array_values(static::dictionary()); |
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82 | } |
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83 | |||
84 | /** |
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85 | * Returns dictionary. |
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86 | * |
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87 | * @return array |
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88 | */ |
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89 | 1 | protected static function dictionary(): array |
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90 | { |
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91 | 1 | return static::$dictionary; |
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92 | } |
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93 | } |
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94 |