From 8b146e8d5a321311e607ef891962a63d4fdce2ad Mon Sep 17 00:00:00 2001
From: Roger Oba <rogerluan.oba@gmail.com>
Date: Sun, 13 Jun 2021 02:12:41 -0300
Subject: [PATCH] Add JSEN custom initializer to init from `Any?`.

---
 .../xcshareddata/xcschemes/JSEN.xcscheme      | 94 +++++++++++++++++++
 Sources/JSEN.swift                            | 17 ++++
 Tests/JSENTests.swift                         | 47 +++++++++-
 3 files changed, 156 insertions(+), 2 deletions(-)
 create mode 100644 .swiftpm/xcode/xcshareddata/xcschemes/JSEN.xcscheme

diff --git a/.swiftpm/xcode/xcshareddata/xcschemes/JSEN.xcscheme b/.swiftpm/xcode/xcshareddata/xcschemes/JSEN.xcscheme
new file mode 100644
index 0000000..53d4c87
--- /dev/null
+++ b/.swiftpm/xcode/xcshareddata/xcschemes/JSEN.xcscheme
@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1250"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "JSEN"
+               BuildableName = "JSEN"
+               BlueprintName = "JSEN"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </BuildActionEntry>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "NO"
+            buildForArchiving = "NO"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "JSENTests"
+               BuildableName = "JSENTests"
+               BlueprintName = "JSENTests"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      codeCoverageEnabled = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES"
+            testExecutionOrdering = "random">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "JSENTests"
+               BuildableName = "JSENTests"
+               BlueprintName = "JSENTests"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "JSEN"
+            BuildableName = "JSEN"
+            BlueprintName = "JSEN"
+            ReferencedContainer = "container:">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/Sources/JSEN.swift b/Sources/JSEN.swift
index 6570449..dc9d8a0 100644
--- a/Sources/JSEN.swift
+++ b/Sources/JSEN.swift
@@ -18,6 +18,23 @@ public enum JSEN : Equatable {
     /// A null value.
     case null
 
+    /// Attempts to initialize a JSEN instance from an `Any?` value.
+    init?(from anyValue: Any?) {
+        switch anyValue {
+        case let int as Int: self = .int(int)
+        case let double as Double: self = .double(double)
+        case let bool as Bool: self = .bool(bool)
+        case let string as String: self = .string(string)
+        case let array as [Any]:
+            let jsenElements: [JSEN] = array.compactMap { JSEN(from: $0) }
+            self = .array(jsenElements)
+        case let dictionary as [String:Any]:
+            let jsenElements: [String:JSEN] = dictionary.compactMapValues { JSEN(from: $0) }
+            self = .dictionary(jsenElements)
+        default: return nil
+        }
+    }
+
     /// The extracted value from **self**, or **nil** if **self** is a `.null` case.
     public var valueType: Any? {
         switch self {
diff --git a/Tests/JSENTests.swift b/Tests/JSENTests.swift
index 1c0682f..c11891e 100644
--- a/Tests/JSENTests.swift
+++ b/Tests/JSENTests.swift
@@ -20,7 +20,7 @@ final class JSENTests : XCTestCase {
     }
 
     func test_decodeAsType_withValidTypeFromDictionary_shouldDecode() {
-        let jsen = JSEN.dictionary([ "key" : "value"])
+        let jsen = JSEN.dictionary(["key" : "value"])
         let decoded = jsen.decode(as: Model.self)
         XCTAssertEqual(decoded?.key, "value")
     }
@@ -32,7 +32,7 @@ final class JSENTests : XCTestCase {
     }
 
     func test_decodeAsType_withInvalidType_shouldReturnNil() {
-        let jsen = JSEN.dictionary(["wrong_key": "value"])
+        let jsen = JSEN.dictionary(["wrong_key" : "value"])
         let decoded = jsen.decode(as: Model.self, dumpingErrorOnFailure: true)
         XCTAssertNil(decoded)
     }
@@ -47,4 +47,47 @@ final class JSENTests : XCTestCase {
         XCTAssertEqual(JSEN.dictionary(["my_key" : "my_value"]).description, #"["my_key": "my_value"]"#)
         XCTAssertEqual(JSEN.null.description, "null")
     }
+
+    func test_initializer_withFlatValues_shouldMatchTheExpectedValues() {
+        let int: Any? = 42
+        XCTAssertEqual(JSEN(from: int), .int(42))
+        let double: Any? = 42.42
+        XCTAssertEqual(JSEN(from: double), .double(42.42))
+        let string: Any? = "testing"
+        XCTAssertEqual(JSEN(from: string), .string("testing"))
+        let bool: Any? = true
+        XCTAssertEqual(JSEN(from: bool), .bool(true))
+        let array: Any? = [ 42 ]
+        XCTAssertEqual(JSEN(from: array), .array([42]))
+        let dictionary: Any? = [ "key" : 42 ]
+        XCTAssertEqual(JSEN(from: dictionary), .dictionary(["key" : 42]))
+    }
+
+    func test_initializer_withNestedValues_shouldSucceed() {
+        let array: Any? = [
+            42,
+            "42",
+            true,
+            [
+                24,
+                "24",
+                false,
+            ],
+        ]
+        XCTAssertNotNil(JSEN(from: array))
+        let dictionary: Any? = [
+            "key" : 42,
+            "another" : true,
+            "nested" : [
+                "key" : true,
+                "another" : "yes",
+                "bool" : false,
+                "double" : 3.14,
+                "3rd" : [
+                    "yup" : "it works",
+                ]
+            ]
+        ]
+        XCTAssertNotNil(JSEN(from: dictionary))
+    }
 }