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| 1 | <?php |
| 2 | |
| 3 | /*! |
| 4 | * ISC License |
| 5 | * |
| 6 | * Copyright (c) 2018-2021, Andrea Giammarchi, @WebReflection |
| 7 | * |
| 8 | * Permission to use, copy, modify, and/or distribute this software for any |
| 9 | * purpose with or without fee is hereby granted, provided that the above |
| 10 | * copyright notice and this permission notice appear in all copies. |
| 11 | * |
| 12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH |
| 13 | * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY |
| 14 | * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, |
| 15 | * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM |
| 16 | * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE |
| 17 | * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 18 | * PERFORMANCE OF THIS SOFTWARE. |
| 19 | */ |
| 20 | |
| 21 | class FlattedString { |
| 22 | public $value = ''; |
| 23 | public function __construct($value) { |
| 24 | $this->value = $value; |
| 25 | } |
| 26 | } |
| 27 | |
| 28 | class Flatted { |
| 29 | |
| 30 | // public utilities |
| 31 | public static function parse($json, $assoc = false, $depth = 512, $options = 0) { |
| 32 | $input = array_map( |
| 33 | 'Flatted::asString', |
| 34 | array_map( |
| 35 | 'Flatted::wrap', |
| 36 | json_decode($json, $assoc, $depth, $options) |
| 37 | ) |
| 38 | ); |
| 39 | $value = &$input[0]; |
| 40 | $set = array(); |
| 41 | $set[] = &$value; |
| 42 | if (is_array($value)) |
| 43 | return Flatted::loop(false, array_keys($value), $input, $set, $value); |
| 44 | if (is_object($value)) |
| 45 | return Flatted::loop(true, Flatted::keys($value), $input, $set, $value); |
| 46 | return $value; |
| 47 | } |
| 48 | |
| 49 | public static function stringify($value, $options = 0, $depth = 512) { |
| 50 | $known = new stdClass; |
| 51 | $known->key = array(); |
| 52 | $known->value = array(); |
| 53 | $input = array(); |
| 54 | $output = array(); |
| 55 | $i = intval(Flatted::index($known, $input, $value)); |
| 56 | while ($i < count($input)) { |
| 57 | $output[$i] = Flatted::transform($known, $input, $input[$i]); |
| 58 | $i++; |
| 59 | } |
| 60 | return json_encode($output, $options, $depth); |
| 61 | } |
| 62 | |
| 63 | // private helpers |
| 64 | private static function asString($value) { |
| 65 | return $value instanceof FlattedString ? $value->value : $value; |
| 66 | } |
| 67 | |
| 68 | private static function index(&$known, &$input, &$value) { |
| 69 | $input[] = &$value; |
| 70 | $index = strval(count($input) - 1); |
| 71 | $known->key[] = &$value; |
| 72 | $known->value[] = &$index; |
| 73 | return $index; |
| 74 | } |
| 75 | |
| 76 | private static function keys(&$value) { |
| 77 | $obj = new ReflectionObject($value); |
| 78 | $props = $obj->getProperties(); |
| 79 | $keys = array(); |
| 80 | foreach ($props as $prop) |
| 81 | $keys[] = $prop->getName(); |
| 82 | return $keys; |
| 83 | } |
| 84 | |
| 85 | private static function loop($obj, $keys, &$input, &$set, &$output) { |
| 86 | foreach ($keys as $key) { |
| 87 | $value = $obj ? $output->$key : $output[$key]; |
| 88 | if ($value instanceof FlattedString) |
| 89 | Flatted::ref($obj, $key, $input[$value->value], $input, $set, $output); |
| 90 | } |
| 91 | return $output; |
| 92 | } |
| 93 | |
| 94 | private static function relate(&$known, &$input, &$value) { |
| 95 | if (is_string($value) || is_array($value) || is_object($value)) { |
| 96 | $key = array_search($value, $known->key, true); |
| 97 | if ($key !== false) |
| 98 | return $known->value[$key]; |
| 99 | return Flatted::index($known, $input, $value); |
| 100 | } |
| 101 | return $value; |
| 102 | } |
| 103 | |
| 104 | private static function ref($obj, &$key, &$value, &$input, &$set, &$output) { |
| 105 | if (is_array($value) && !in_array($value, $set, true)) { |
| 106 | $set[] = $value; |
| 107 | $value = Flatted::loop(false, array_keys($value), $input, $set, $value); |
| 108 | } |
| 109 | elseif (is_object($value) && !in_array($value, $set, true)) { |
| 110 | $set[] = $value; |
| 111 | $value = Flatted::loop(true, Flatted::keys($value), $input, $set, $value); |
| 112 | } |
| 113 | if ($obj) { |
| 114 | $output->$key = &$value; |
| 115 | } |
| 116 | else { |
| 117 | $output[$key] = &$value; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | private static function transform(&$known, &$input, &$value) { |
| 122 | if (is_array($value)) { |
| 123 | return array_map( |
| 124 | function ($value) use(&$known, &$input) { |
| 125 | return Flatted::relate($known, $input, $value); |
| 126 | }, |
| 127 | $value |
| 128 | ); |
| 129 | } |
| 130 | if (is_object($value)) { |
| 131 | $object = new stdClass; |
| 132 | $keys = Flatted::keys($value); |
| 133 | foreach ($keys as $key) |
| 134 | $object->$key = Flatted::relate($known, $input, $value->$key); |
| 135 | return $object; |
| 136 | } |
| 137 | return $value; |
| 138 | } |
| 139 | |
| 140 | private static function wrap($value) { |
| 141 | if (is_string($value)) { |
| 142 | return new FlattedString($value); |
| 143 | } |
| 144 | if (is_array($value)) { |
| 145 | return array_map('Flatted::wrap', $value); |
| 146 | } |
| 147 | if (is_object($value)) { |
| 148 | $keys = Flatted::keys($value); |
| 149 | foreach ($keys as $key) { |
| 150 | $value->$key = self::wrap($value->$key); |
| 151 | } |
| 152 | } |
| 153 | return $value; |
| 154 | } |
| 155 | } |
| 156 | ?> |