1 | <?php |
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2 | |||
3 | declare(strict_types=1); |
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4 | |||
5 | namespace Koriym\AppStateDiagram; |
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6 | |||
7 | use Koriym\AppStateDiagram\Exception\DescriptorIsNotArrayException; |
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8 | use Koriym\AppStateDiagram\Exception\InvalidDescriptorException; |
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9 | use Koriym\AppStateDiagram\Exception\InvalidTypeException; |
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10 | use stdClass; |
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11 | |||
12 | use function assert; |
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13 | use function in_array; |
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14 | use function is_array; |
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15 | use function is_string; |
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16 | use function json_encode; |
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17 | use function ksort; |
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18 | use function property_exists; |
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19 | |||
20 | final class CreateDescriptor |
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21 | { |
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22 | private const VALID_TYPES = ['semantic', 'safe', 'unsafe', 'idempotent']; |
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23 | |||
24 | /** |
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25 | * @param array<string, stdClass> $descriptorsArray |
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26 | * |
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27 | * @return array<string, AbstractDescriptor> |
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28 | */ |
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29 | public function __invoke(array $descriptorsArray, ?stdClass $parentDescriptor = null): array |
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30 | { |
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31 | $descriptors = []; |
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32 | foreach ($descriptorsArray as $descriptor) { |
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33 | /** @var array<string, AbstractDescriptor> $descriptors */ |
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34 | $descriptors = $this->scan($descriptor, $descriptors, $parentDescriptor); |
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35 | } |
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36 | |||
37 | ksort($descriptors); |
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38 | |||
39 | return $descriptors; |
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40 | } |
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41 | |||
42 | /** |
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43 | * @param array<string, AbstractDescriptor> $descriptors |
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44 | * |
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45 | * @return array<AbstractDescriptor> |
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46 | */ |
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47 | private function scan(stdClass $descriptor, array $descriptors, ?stdClass $parentDescriptor): array |
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48 | { |
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49 | $this->defaultSemantic($descriptor); |
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50 | $this->validateDescriptor($descriptor); |
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51 | |||
52 | if (isset($descriptor->id) && is_string($descriptor->id) && $descriptor->type === 'semantic') { |
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53 | $descriptors[$descriptor->id] = new SemanticDescriptor($descriptor, $parentDescriptor); |
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54 | } |
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55 | |||
56 | $isTransDescriptor = isset($descriptor->type) && in_array($descriptor->type, ['safe', 'unsafe', 'idempotent'], true); |
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57 | if ($isTransDescriptor) { |
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58 | $parent = $parentDescriptor ?? new NullDescriptor(); |
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59 | assert(is_string($descriptor->id)); |
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60 | |||
61 | $descriptors[$descriptor->id] = new TransDescriptor($descriptor, new SemanticDescriptor($parent)); |
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62 | } |
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63 | |||
64 | if (property_exists($descriptor, 'descriptor')) { |
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65 | $descriptors = $this->scanInlineDescriptor($descriptor, $descriptors); |
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66 | } |
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67 | |||
68 | return $descriptors; |
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69 | } |
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70 | |||
71 | private function defaultSemantic(stdClass $descriptor): void |
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72 | { |
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73 | if (isset($descriptor->id) && ! isset($descriptor->type)) { |
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74 | $descriptor->type = 'semantic'; |
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75 | } |
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76 | } |
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77 | |||
78 | /** |
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79 | * @param array<AbstractDescriptor> $descriptors |
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80 | * |
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81 | * @return array<array-key, AbstractDescriptor> |
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82 | */ |
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83 | private function scanInlineDescriptor(stdClass $descriptor, array $descriptors): array |
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84 | { |
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85 | if (! is_array($descriptor->descriptor)) { |
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86 | $msg = is_string($descriptor->descriptor) ? $descriptor->descriptor : json_encode($descriptor); |
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87 | |||
88 | throw new DescriptorIsNotArrayException((string) $msg); |
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89 | } |
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90 | |||
91 | /** @psalm-suppress MixedArgumentTypeCoercion */ |
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92 | $inLineSemantics = ($this)($descriptor->descriptor, $descriptor); |
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93 | /** @psalm-suppress MixedArgumentTypeCoercion */ |
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94 | if ($inLineSemantics !== []) { |
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95 | $descriptors = $this->addInlineSemantics($descriptors, $inLineSemantics); |
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96 | } |
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97 | |||
98 | return $descriptors; |
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99 | } |
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100 | |||
101 | /** |
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102 | * @param array<string, AbstractDescriptor> $descriptors |
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103 | * @param array<string, AbstractDescriptor> $inLineSemantics |
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104 | * |
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105 | * @return array<string, AbstractDescriptor> |
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106 | */ |
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107 | private function addInlineSemantics(array $descriptors, array $inLineSemantics): array |
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108 | { |
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109 | foreach ($inLineSemantics as $inLineSemantic) { |
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110 | if ($inLineSemantic instanceof SemanticDescriptor) { |
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111 | $descriptors[$inLineSemantic->id] = $inLineSemantic; |
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112 | } |
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113 | } |
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114 | |||
115 | return $descriptors; |
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116 | } |
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117 | |||
118 | private function validateDescriptor(stdClass $descriptor): void |
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119 | { |
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120 | $hasNoId = ! isset($descriptor->href) && ! isset($descriptor->id); |
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121 | if ($hasNoId) { |
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122 | throw new InvalidDescriptorException((string) json_encode($descriptor)); |
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123 | } |
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124 | |||
125 | if (isset($descriptor->type) && ! in_array($descriptor->type, self::VALID_TYPES)) { |
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126 | throw new InvalidTypeException((string) $descriptor->type); |
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127 | } |
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128 | } |
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129 | } |
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130 |