Added new codable for StringOrDouble (#17)

Author: christiancabarrocas

Sources/SageSwiftKit/CodableMacros.swift

@@ -20,6 +20,9 @@ public macro CustomCodable(nestedProperty: String? = nil) = #externalMacro(modul
 @attached(peer)
 public macro StringOrInt() = #externalMacro(module: "SageSwiftKitMacros", type: "StringOrInt")
 
+@attached(peer)
+public macro StringOrDouble() = #externalMacro(module: "SageSwiftKitMacros", type: "StringOrDouble")
+
 @attached(peer)
 public macro StringToDouble() = #externalMacro(module: "SageSwiftKitMacros", type: "StringToDouble")
 

Sources/SageSwiftKitClient/main.swift

@@ -22,6 +22,9 @@ struct PlayingObject {
 
     @StringOrInt
     var value: String?
+    
+    @StringOrDouble
+    var sum: String?
 
     @CustomURL
     var createdOn: URL?

Sources/SageSwiftKitMacros/CodableMacros/Builders/DecodeVariableBuild.swift

@@ -11,6 +11,7 @@ enum DecodingAttribute: Identifiable, Equatable {
     case date(AttributeSyntax)
     case url(AttributeSyntax)
     case stringOrInt(AttributeSyntax)
+    case stringOrDouble(AttributeSyntax)
     case stringToDouble(AttributeSyntax)
 
     var id: String {
@@ -23,6 +24,8 @@ enum DecodingAttribute: Identifiable, Equatable {
             return String(describing: CustomURL.self)
         case .stringOrInt:
             return String(describing: StringOrInt.self)
+        case .stringOrDouble:
+            return String(describing: StringOrDouble.self)
         case .stringToDouble:
             return String(describing: StringToDouble.self)
         }
@@ -38,6 +41,8 @@ enum DecodingAttribute: Identifiable, Equatable {
             return attributeSyntax
         case .stringOrInt(let attributeSyntax):
             return attributeSyntax
+        case .stringOrDouble(let attributeSyntax):
+            return attributeSyntax
         case .stringToDouble(let attributeSyntax):
             return attributeSyntax
         }
@@ -87,6 +92,10 @@ struct DecodeVariableBuild {
                 return .stringOrInt(variableAttribute)
             }
 
+            if variableAttribute.adapter.name == String(describing: StringOrDouble.self) {
+                return .stringOrDouble(variableAttribute)
+            }
+            
             if variableAttribute.adapter.name == String(describing: StringToDouble.self) {
                 return .stringToDouble(variableAttribute)
             }
@@ -112,6 +121,10 @@ struct DecodeVariableBuild {
             return buildStringOrInt(attribute: attribute)
         }
 
+        if let attribute = variableDecodingAttributes.getAttribute(macro: StringOrDouble.self)?.attribute {
+            return buildStringOrDouble(attribute: attribute)
+        }
+        
         if let attribute = variableDecodingAttributes.getAttribute(macro: StringToDouble.self)?.attribute {
             return buildStringToDouble(attribute: attribute)
         }
@@ -207,6 +220,41 @@ struct DecodeVariableBuild {
         return .init(otherBuilder: ifBuilder)
     }
 
+    func buildStringOrDouble(attribute: AttributeSyntax) -> CodeBlockItemSyntaxBuilder {
+        guard type == "String" else {
+            return buildBasicDecode()
+        }
+        
+        let conditionalName = "tmp"+varName.capitalized
+        
+        let ifBody: [CodeBlockItemSyntaxBuilder] = [
+            .init(code: "\(varName) = \(conditionalName)")
+        ]
+        
+        let elseIfBody: [CodeBlockItemSyntaxBuilder] = [
+            .init(code: "\(varName) = String(\(conditionalName))")
+        ]
+        
+        let elseBody: [CodeBlockItemSyntaxBuilder] = [
+            .init(code: "\(varName) = nil")
+        ]
+        
+        let elseIfBuilder = IfExprSyntaxBuilder(
+            condition: "if let \(conditionalName) = try? container.decode(Double.self, forKey: .\(varName))",
+            body: elseIfBody,
+            elseBody: elseBody
+        )
+        let elseIfCode = CodeBlockItemSyntaxBuilder.init(otherBuilder: elseIfBuilder)
+        
+        let ifBuilder = IfExprSyntaxBuilder(
+            condition: "if let \(conditionalName) = try? container.decode(String.self, forKey: .\(varName))",
+            body: ifBody,
+            elseBody: [elseIfCode]
+        )
+        
+        return .init(otherBuilder: ifBuilder)
+    }
+    
     func buildStringToDouble(attribute: AttributeSyntax) -> CodeBlockItemSyntaxBuilder {
 
         guard type == "Double" else {

Sources/SageSwiftKitMacros/CodableMacros/CobableMacros.swift

@@ -16,6 +16,7 @@ struct CobableMacros: CompilerPlugin {
         CustomDate.self,
         CustomURL.self,
         StringOrInt.self,
+        StringOrDouble.self,
         StringToDouble.self
     ]
 }

Sources/SageSwiftKitMacros/CodableMacros/Macros/CustomDecodingMacros.swift

@@ -31,6 +31,12 @@ public enum StringOrInt: PeerMacro {
     }
 }
 
+public enum StringOrDouble: PeerMacro {
+    public static func expansion(of node: SwiftSyntax.AttributeSyntax, providingPeersOf declaration: some SwiftSyntax.DeclSyntaxProtocol, in context: some SwiftSyntaxMacros.MacroExpansionContext) throws -> [SwiftSyntax.DeclSyntax] {
+        []
+    }
+}
+
 public enum StringToDouble: PeerMacro {
     public static func expansion(of node: SwiftSyntax.AttributeSyntax, providingPeersOf declaration: some SwiftSyntax.DeclSyntaxProtocol, in context: some SwiftSyntaxMacros.MacroExpansionContext) throws -> [SwiftSyntax.DeclSyntax] {
         []

Tests/SageSwiftKitTests/CodableMacrosTests/CustomDecodableTests.swift

@@ -170,6 +170,50 @@ final class CustomDecodableTests: XCTestCase {
         )
 #else
         throw XCTSkip("macros are only supported when running tests for the host platform")
+#endif
+    }
+    
+    func testStringOrDouble() throws {
+#if canImport(SageSwiftKitMacros)
+        assertMacroExpansion(
+    """
+    @CustomCodable
+    struct PlayingObject {
+        @StringOrDouble
+        var value: String
+    }
+    """,
+    expandedSource: """
+    struct PlayingObject {
+        var value: String
+    
+        enum CodingKeys: String, CodingKey {
+            case value
+        }
+    
+        public init(from decoder: any Decoder) throws {
+            let container = try decoder.container(keyedBy: CodingKeys.self)
+            if let tmpValue = try? container.decode(String.self, forKey: .value) {
+                value = tmpValue
+            } else {
+                if let tmpValue = try? container.decode(Double.self, forKey: .value) {
+                    value = String(tmpValue)
+                } else {
+                    value = nil
+                }
+            }
+        }
+    
+        public func encode(to encoder: Encoder) throws {
+            var container = encoder.container(keyedBy: CodingKeys.self)
+            try container.encode(value, forKey: .value)
+        }
+    }
+    """,
+    macros: codableMacros
+        )
+#else
+        throw XCTSkip("macros are only supported when running tests for the host platform")
 #endif
     }
 }

Tests/SageSwiftKitTests/SageSwiftKitTests.swift

@@ -19,6 +19,7 @@ let codableMacros: [String: Macro.Type] = [
     "CustomDate": CustomDate.self,
     "CustomURL": CustomURL.self,
     "StringOrInt": StringOrInt.self,
+    "StringOrDouble": StringOrDouble.self,
     "StringToDouble": StringToDouble.self
 ]