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| 1 | +const FUNCTION_PLACEHOLDER = 'function(){}'; |
| 2 | +const UNDEFINED_PLACEHOLDER = '[undefined]'; |
| 3 | +const CIRCULAR_PLACEHOLDER = '[circular]'; |
| 4 | +const NON_SERIALIZABLE_PLACEHOLDER = '[unserializable]'; |
| 5 | + |
| 6 | +const toStringTag = (value: unknown) => |
| 7 | + Object.prototype.toString.call(value).slice(8, -1); |
| 8 | + |
| 9 | +const isPlainObject = (value: unknown): value is Record<string, unknown> => { |
| 10 | + if (!value || typeof value !== 'object') { |
| 11 | + return false; |
| 12 | + } |
| 13 | + |
| 14 | + const proto = Object.getPrototypeOf(value); |
| 15 | + return proto === Object.prototype || proto === null; |
| 16 | +}; |
| 17 | + |
| 18 | +const sanitizeValue = ( |
| 19 | + value: unknown, |
| 20 | + seen: WeakMap<object, unknown>, |
| 21 | +): unknown => { |
| 22 | + if ( |
| 23 | + value === null || |
| 24 | + typeof value === 'string' || |
| 25 | + typeof value === 'number' |
| 26 | + ) { |
| 27 | + return Number.isNaN(value) ? '[NaN]' : value; |
| 28 | + } |
| 29 | + |
| 30 | + if (typeof value === 'boolean') { |
| 31 | + return value; |
| 32 | + } |
| 33 | + |
| 34 | + if (typeof value === 'function') { |
| 35 | + return FUNCTION_PLACEHOLDER; |
| 36 | + } |
| 37 | + |
| 38 | + if (typeof value === 'undefined') { |
| 39 | + return UNDEFINED_PLACEHOLDER; |
| 40 | + } |
| 41 | + |
| 42 | + if (typeof value === 'bigint' || typeof value === 'symbol') { |
| 43 | + return String(value); |
| 44 | + } |
| 45 | + |
| 46 | + if (!(value instanceof Object)) { |
| 47 | + return NON_SERIALIZABLE_PLACEHOLDER; |
| 48 | + } |
| 49 | + |
| 50 | + if (seen.has(value)) { |
| 51 | + return CIRCULAR_PLACEHOLDER; |
| 52 | + } |
| 53 | + |
| 54 | + if (Array.isArray(value)) { |
| 55 | + const next: unknown[] = []; |
| 56 | + seen.set(value, next); |
| 57 | + value.forEach((item, index) => { |
| 58 | + next[index] = sanitizeValue(item, seen); |
| 59 | + }); |
| 60 | + return next; |
| 61 | + } |
| 62 | + |
| 63 | + if (value instanceof Date) { |
| 64 | + return value.toISOString(); |
| 65 | + } |
| 66 | + |
| 67 | + if (value instanceof RegExp) { |
| 68 | + return value.toString(); |
| 69 | + } |
| 70 | + |
| 71 | + if (value instanceof Error) { |
| 72 | + const next = { |
| 73 | + name: value.name, |
| 74 | + message: value.message, |
| 75 | + stack: value.stack || '', |
| 76 | + }; |
| 77 | + seen.set(value, next); |
| 78 | + return next; |
| 79 | + } |
| 80 | + |
| 81 | + if (value instanceof Map) { |
| 82 | + const next: unknown[] = []; |
| 83 | + seen.set(value, next); |
| 84 | + next.push( |
| 85 | + ...Array.from(value.entries()).map(([key, item]) => [ |
| 86 | + sanitizeValue(key, seen), |
| 87 | + sanitizeValue(item, seen), |
| 88 | + ]), |
| 89 | + ); |
| 90 | + return next; |
| 91 | + } |
| 92 | + |
| 93 | + if (value instanceof Set) { |
| 94 | + const next: unknown[] = []; |
| 95 | + seen.set(value, next); |
| 96 | + next.push( |
| 97 | + ...Array.from(value.values()).map((item) => sanitizeValue(item, seen)), |
| 98 | + ); |
| 99 | + return next; |
| 100 | + } |
| 101 | + |
| 102 | + if (ArrayBuffer.isView(value)) { |
| 103 | + return Array.from(new Uint8Array(value.buffer)); |
| 104 | + } |
| 105 | + |
| 106 | + if (value instanceof ArrayBuffer) { |
| 107 | + return Array.from(new Uint8Array(value)); |
| 108 | + } |
| 109 | + |
| 110 | + if (typeof Node !== 'undefined' && value instanceof Node) { |
| 111 | + return `[${toStringTag(value)}]`; |
| 112 | + } |
| 113 | + |
| 114 | + if (typeof Window !== 'undefined' && value instanceof Window) { |
| 115 | + return '[Window]'; |
| 116 | + } |
| 117 | + |
| 118 | + if (typeof Document !== 'undefined' && value instanceof Document) { |
| 119 | + return '[Document]'; |
| 120 | + } |
| 121 | + |
| 122 | + const next: Record<string, unknown> = {}; |
| 123 | + seen.set(value, next); |
| 124 | + |
| 125 | + const entries = isPlainObject(value) |
| 126 | + ? Object.keys(value).map((key) => { |
| 127 | + try { |
| 128 | + return [key, value[key]] as const; |
| 129 | + } catch (_error) { |
| 130 | + return [key, NON_SERIALIZABLE_PLACEHOLDER] as const; |
| 131 | + } |
| 132 | + }) |
| 133 | + : Reflect.ownKeys(value).map((key) => { |
| 134 | + try { |
| 135 | + return [ |
| 136 | + String(key), |
| 137 | + (value as Record<PropertyKey, unknown>)[key], |
| 138 | + ] as const; |
| 139 | + } catch (_error) { |
| 140 | + return [String(key), NON_SERIALIZABLE_PLACEHOLDER] as const; |
| 141 | + } |
| 142 | + }); |
| 143 | + |
| 144 | + entries.forEach(([key, item]) => { |
| 145 | + try { |
| 146 | + next[key] = sanitizeValue(item, seen); |
| 147 | + } catch (_error) { |
| 148 | + next[key] = NON_SERIALIZABLE_PLACEHOLDER; |
| 149 | + } |
| 150 | + }); |
| 151 | + |
| 152 | + return next; |
| 153 | +}; |
| 154 | + |
| 155 | +export const sanitizePostMessagePayload = <T>(payload: T): T => { |
| 156 | + return sanitizeValue(payload, new WeakMap<object, unknown>()) as T; |
| 157 | +}; |
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