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| 1 | +import Foundation |
| 2 | + |
| 3 | +public enum Condition: String, Codable { |
| 4 | + case equal = "equal" |
| 5 | + case notEqual = "notEqual" |
| 6 | + case greaterThan = "greaterThan" |
| 7 | + case greaterThanEqual = "greaterThanEqual" |
| 8 | + case lessThan = "lessThan" |
| 9 | + case lessThanEqual = "lessThanEqual" |
| 10 | + case contains = "contains" |
| 11 | + case isNull = "isNull" |
| 12 | + case isNotNull = "isNotNull" |
| 13 | +} |
| 14 | + |
| 15 | +enum OperatorValue: Codable { |
| 16 | + case string(String) |
| 17 | + case int(Int) |
| 18 | + case double(Double) |
| 19 | + case bool(Bool) |
| 20 | + case array([OperatorValue]) |
| 21 | + case null |
| 22 | + |
| 23 | + init(from decoder: Decoder) throws { |
| 24 | + let container = try decoder.singleValueContainer() |
| 25 | + |
| 26 | + if container.decodeNil() { |
| 27 | + self = .null |
| 28 | + } else if let stringValue = try? container.decode(String.self) { |
| 29 | + self = .string(stringValue) |
| 30 | + } else if let intValue = try? container.decode(Int.self) { |
| 31 | + self = .int(intValue) |
| 32 | + } else if let doubleValue = try? container.decode(Double.self) { |
| 33 | + self = .double(doubleValue) |
| 34 | + } else if let boolValue = try? container.decode(Bool.self) { |
| 35 | + self = .bool(boolValue) |
| 36 | + } else if let arrayValue = try? container.decode([OperatorValue].self) { |
| 37 | + self = .array(arrayValue) |
| 38 | + } else { |
| 39 | + throw DecodingError.dataCorruptedError( |
| 40 | + in: container, |
| 41 | + debugDescription: "OperatorValue cannot be decoded" |
| 42 | + ) |
| 43 | + } |
| 44 | + } |
| 45 | + |
| 46 | + func encode(to encoder: Encoder) throws { |
| 47 | + var container = encoder.singleValueContainer() |
| 48 | + switch self { |
| 49 | + case .string(let value): |
| 50 | + try container.encode(value) |
| 51 | + case .int(let value): |
| 52 | + try container.encode(value) |
| 53 | + case .double(let value): |
| 54 | + try container.encode(value) |
| 55 | + case .bool(let value): |
| 56 | + try container.encode(value) |
| 57 | + case .array(let value): |
| 58 | + try container.encode(value) |
| 59 | + case .null: |
| 60 | + try container.encodeNil() |
| 61 | + } |
| 62 | + } |
| 63 | +} |
| 64 | + |
| 65 | +public struct Operator : Codable, CustomStringConvertible { |
| 66 | + var method: String |
| 67 | + var values: [OperatorValue]? |
| 68 | + |
| 69 | + init(method: String, values: Any? = nil) { |
| 70 | + self.method = method |
| 71 | + self.values = Operator.convertToOperatorValueArray(values) |
| 72 | + } |
| 73 | + |
| 74 | + public init(from decoder: Decoder) throws { |
| 75 | + let container = try decoder.container(keyedBy: CodingKeys.self) |
| 76 | + |
| 77 | + self.method = try container.decode(String.self, forKey: .method) |
| 78 | + self.values = try container.decodeIfPresent([OperatorValue].self, forKey: .values) |
| 79 | + } |
| 80 | + |
| 81 | + private static func convertToOperatorValueArray(_ values: Any?) -> [OperatorValue]? { |
| 82 | + // Handle nil |
| 83 | + if values == nil { |
| 84 | + return nil |
| 85 | + } |
| 86 | + |
| 87 | + // Handle NSNull as [.null] |
| 88 | + if values is NSNull { |
| 89 | + return [.null] |
| 90 | + } |
| 91 | + |
| 92 | + switch values { |
| 93 | + case let valueArray as [OperatorValue]: |
| 94 | + return valueArray |
| 95 | + case let stringArray as [String]: |
| 96 | + return stringArray.map { .string($0) } |
| 97 | + case let intArray as [Int]: |
| 98 | + return intArray.map { .int($0) } |
| 99 | + case let doubleArray as [Double]: |
| 100 | + return doubleArray.map { .double($0) } |
| 101 | + case let boolArray as [Bool]: |
| 102 | + return boolArray.map { .bool($0) } |
| 103 | + case let stringValue as String: |
| 104 | + return [.string(stringValue)] |
| 105 | + case let intValue as Int: |
| 106 | + return [.int(intValue)] |
| 107 | + case let doubleValue as Double: |
| 108 | + return [.double(doubleValue)] |
| 109 | + case let boolValue as Bool: |
| 110 | + return [.bool(boolValue)] |
| 111 | + case let anyArray as [Any]: |
| 112 | + // Preserve empty arrays as empty OperatorValue arrays |
| 113 | + if anyArray.isEmpty { |
| 114 | + return [] |
| 115 | + } |
| 116 | + |
| 117 | + // Map all items, converting nil/unknown to .null |
| 118 | + let nestedValues = anyArray.map { item -> OperatorValue in |
| 119 | + if item is NSNull { |
| 120 | + return .null |
| 121 | + } else if let stringValue = item as? String { |
| 122 | + return .string(stringValue) |
| 123 | + } else if let intValue = item as? Int { |
| 124 | + return .int(intValue) |
| 125 | + } else if let doubleValue = item as? Double { |
| 126 | + return .double(doubleValue) |
| 127 | + } else if let boolValue = item as? Bool { |
| 128 | + return .bool(boolValue) |
| 129 | + } else if let nestedArray = item as? [Any] { |
| 130 | + let converted = convertToOperatorValueArray(nestedArray) ?? [] |
| 131 | + return .array(converted) |
| 132 | + } else { |
| 133 | + // Unknown/unsupported types become .null |
| 134 | + return .null |
| 135 | + } |
| 136 | + } |
| 137 | + return nestedValues |
| 138 | + default: |
| 139 | + // Unknown types become [.null] |
| 140 | + return [.null] |
| 141 | + } |
| 142 | + } |
| 143 | + |
| 144 | + enum CodingKeys: String, CodingKey { |
| 145 | + case method |
| 146 | + case values |
| 147 | + } |
| 148 | + |
| 149 | + public func encode(to encoder: Encoder) throws { |
| 150 | + var container = encoder.container(keyedBy: CodingKeys.self) |
| 151 | + try container.encode(method, forKey: .method) |
| 152 | + |
| 153 | + if (values != nil) { |
| 154 | + try container.encode(values, forKey: .values) |
| 155 | + } |
| 156 | + } |
| 157 | + |
| 158 | + public var description: String { |
| 159 | + guard let data = try? JSONEncoder().encode(self) else { |
| 160 | + return "" |
| 161 | + } |
| 162 | + |
| 163 | + return String(data: data, encoding: .utf8) ?? "" |
| 164 | + } |
| 165 | + |
| 166 | + public static func increment(_ value: Double = 1, max: Double? = nil) -> String { |
| 167 | + if value.isNaN || value.isInfinite { |
| 168 | + fatalError("Value cannot be NaN or Infinity") |
| 169 | + } |
| 170 | + if let max = max, max.isNaN || max.isInfinite { |
| 171 | + fatalError("Max cannot be NaN or Infinity") |
| 172 | + } |
| 173 | + var values: [Any] = [value] |
| 174 | + if let max = max { |
| 175 | + values.append(max) |
| 176 | + } |
| 177 | + return Operator(method: "increment", values: values).description |
| 178 | + } |
| 179 | + |
| 180 | + public static func decrement(_ value: Double = 1, min: Double? = nil) -> String { |
| 181 | + if value.isNaN || value.isInfinite { |
| 182 | + fatalError("Value cannot be NaN or Infinity") |
| 183 | + } |
| 184 | + if let min = min, min.isNaN || min.isInfinite { |
| 185 | + fatalError("Min cannot be NaN or Infinity") |
| 186 | + } |
| 187 | + var values: [Any] = [value] |
| 188 | + if let min = min { |
| 189 | + values.append(min) |
| 190 | + } |
| 191 | + return Operator(method: "decrement", values: values).description |
| 192 | + } |
| 193 | + |
| 194 | + public static func multiply(_ factor: Double, max: Double? = nil) -> String { |
| 195 | + if factor.isNaN || factor.isInfinite { |
| 196 | + fatalError("Factor cannot be NaN or Infinity") |
| 197 | + } |
| 198 | + if let max = max, max.isNaN || max.isInfinite { |
| 199 | + fatalError("Max cannot be NaN or Infinity") |
| 200 | + } |
| 201 | + var values: [Any] = [factor] |
| 202 | + if let max = max { |
| 203 | + values.append(max) |
| 204 | + } |
| 205 | + return Operator(method: "multiply", values: values).description |
| 206 | + } |
| 207 | + |
| 208 | + public static func divide(_ divisor: Double, min: Double? = nil) -> String { |
| 209 | + if divisor.isNaN || divisor.isInfinite { |
| 210 | + fatalError("Divisor cannot be NaN or Infinity") |
| 211 | + } |
| 212 | + if let min = min, min.isNaN || min.isInfinite { |
| 213 | + fatalError("Min cannot be NaN or Infinity") |
| 214 | + } |
| 215 | + if divisor == 0 { |
| 216 | + fatalError("Divisor cannot be zero") |
| 217 | + } |
| 218 | + var values: [Any] = [divisor] |
| 219 | + if let min = min { |
| 220 | + values.append(min) |
| 221 | + } |
| 222 | + return Operator(method: "divide", values: values).description |
| 223 | + } |
| 224 | + |
| 225 | + public static func modulo(_ divisor: Double) -> String { |
| 226 | + if divisor.isNaN || divisor.isInfinite { |
| 227 | + fatalError("Divisor cannot be NaN or Infinity") |
| 228 | + } |
| 229 | + if divisor == 0 { |
| 230 | + fatalError("Divisor cannot be zero") |
| 231 | + } |
| 232 | + return Operator(method: "modulo", values: [divisor]).description |
| 233 | + } |
| 234 | + |
| 235 | + public static func power(_ exponent: Double, max: Double? = nil) -> String { |
| 236 | + if exponent.isNaN || exponent.isInfinite { |
| 237 | + fatalError("Exponent cannot be NaN or Infinity") |
| 238 | + } |
| 239 | + if let max = max, max.isNaN || max.isInfinite { |
| 240 | + fatalError("Max cannot be NaN or Infinity") |
| 241 | + } |
| 242 | + var values: [Any] = [exponent] |
| 243 | + if let max = max { |
| 244 | + values.append(max) |
| 245 | + } |
| 246 | + return Operator(method: "power", values: values).description |
| 247 | + } |
| 248 | + |
| 249 | + public static func arrayAppend(_ values: [Any]) -> String { |
| 250 | + return Operator(method: "arrayAppend", values: values).description |
| 251 | + } |
| 252 | + |
| 253 | + public static func arrayPrepend(_ values: [Any]) -> String { |
| 254 | + return Operator(method: "arrayPrepend", values: values).description |
| 255 | + } |
| 256 | + |
| 257 | + public static func arrayInsert(_ index: Int, value: Any) -> String { |
| 258 | + return Operator(method: "arrayInsert", values: [index, value]).description |
| 259 | + } |
| 260 | + |
| 261 | + public static func arrayRemove(_ value: Any) -> String { |
| 262 | + return Operator(method: "arrayRemove", values: [value]).description |
| 263 | + } |
| 264 | + |
| 265 | + public static func arrayUnique() -> String { |
| 266 | + return Operator(method: "arrayUnique", values: []).description |
| 267 | + } |
| 268 | + |
| 269 | + public static func arrayIntersect(_ values: [Any]) -> String { |
| 270 | + return Operator(method: "arrayIntersect", values: values).description |
| 271 | + } |
| 272 | + |
| 273 | + public static func arrayDiff(_ values: [Any]) -> String { |
| 274 | + return Operator(method: "arrayDiff", values: values).description |
| 275 | + } |
| 276 | + |
| 277 | + public static func arrayFilter(_ condition: Condition, value: Any? = nil) -> String { |
| 278 | + let values: [Any] = [condition.rawValue, value ?? NSNull()] |
| 279 | + return Operator(method: "arrayFilter", values: values).description |
| 280 | + } |
| 281 | + |
| 282 | + public static func stringConcat(_ value: Any) -> String { |
| 283 | + return Operator(method: "stringConcat", values: [value]).description |
| 284 | + } |
| 285 | + |
| 286 | + public static func stringReplace(_ search: String, _ replace: String) -> String { |
| 287 | + return Operator(method: "stringReplace", values: [search, replace]).description |
| 288 | + } |
| 289 | + |
| 290 | + public static func toggle() -> String { |
| 291 | + return Operator(method: "toggle", values: []).description |
| 292 | + } |
| 293 | + |
| 294 | + public static func dateAddDays(_ days: Int) -> String { |
| 295 | + return Operator(method: "dateAddDays", values: [days]).description |
| 296 | + } |
| 297 | + |
| 298 | + public static func dateSubDays(_ days: Int) -> String { |
| 299 | + return Operator(method: "dateSubDays", values: [days]).description |
| 300 | + } |
| 301 | + |
| 302 | + public static func dateSetNow() -> String { |
| 303 | + return Operator(method: "dateSetNow", values: []).description |
| 304 | + } |
| 305 | +} |
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