Add localization

Package.swift

@@ -5,7 +5,7 @@ import PackageDescription
 let package = Package(
   name: "JSONSchema",
   platforms: [
-    .macOS(.v10_13),
+    .macOS(.v10_13), .iOS(.v11)
   ],
   products: [
     .library(name: "JSONSchema", targets: ["JSONSchema"]),

Sources/Applicators/anyOf.swift

@@ -1,12 +1,16 @@
+import Foundation
+
+
 func anyOf(context: Context, anyOf: Any, instance: Any, schema: [String: Any]) throws -> AnySequence<ValidationError> {
   guard let anyOf = anyOf as? [Any] else {
     return AnySequence(EmptyCollection())
   }
 
   if try !anyOf.contains(where: { try context.descend(instance: instance, subschema: $0).isValid }) {
+    let message = String(format: NSLocalizedString("%@ does not meet anyOf validation rules.", comment: ""), "\(instance)")
     return AnySequence([
       ValidationError(
-        "\(instance) does not meet anyOf validation rules.",
+        message,
         instanceLocation: context.instanceLocation,
         keywordLocation: context.keywordLocation
       ),

Sources/Applicators/contains.swift

@@ -1,3 +1,6 @@
+import Foundation
+
+
 func contains(context: Context, contains: Any, instance: Any, schema: [String: Any]) throws -> AnySequence<ValidationError> {
   guard let instance = instance as? [Any] else {
     return AnySequence(EmptyCollection())
@@ -28,9 +31,10 @@ func contains(context: Context, contains: Any, instance: Any, schema: [String: A
     return try context.descend(instance: subinstance, subschema: contains).isValid
   }).count
   if let max = max, containsCount > max {
+    let message = String(format: NSLocalizedString("%@ does not match contains + maxContains %@.", comment: ""), "\(instance)", "\(max)")
     return AnySequence([
       ValidationError(
-        "\(instance) does not match contains + maxContains \(max)",
+        message,
         instanceLocation: context.instanceLocation,
         keywordLocation: context.keywordLocation
       )
@@ -41,9 +45,10 @@ func contains(context: Context, contains: Any, instance: Any, schema: [String: A
     return AnySequence(EmptyCollection())
   }
 
+  let message = String(format: NSLocalizedString("%@ does not match contains.", comment: ""), "\(instance)")
   return AnySequence([
     ValidationError(
-      "'\(instance) does not match contains",
+      message,
       instanceLocation: context.instanceLocation,
       keywordLocation: context.keywordLocation
     )

Sources/Applicators/dependencies.swift

@@ -1,3 +1,6 @@
+import Foundation
+
+
 func dependencies(context: Context, dependencies: Any, instance: Any, schema: [String: Any]) throws -> AnySequence<ValidationError> {
   guard let dependencies = dependencies as? [String: Any] else {
     return AnySequence(EmptyCollection())
@@ -13,9 +16,10 @@ func dependencies(context: Context, dependencies: Any, instance: Any, schema: [S
     if let dependency = dependency as? [String] {
       for key in dependency {
         if !instance.keys.contains(key) {
+          let message = String(format: NSLocalizedString("'%@' is a dependency for '%@'.", comment: ""), key, property)
           results.append(AnySequence([
             ValidationError(
-              "'\(key)' is a dependency for '\(property)'",
+              message,
               instanceLocation: context.instanceLocation,
               keywordLocation: context.keywordLocation
             ),

Sources/Applicators/not.swift

@@ -1,11 +1,15 @@
+import Foundation
+
+
 func not(context: Context, not: Any, instance: Any, schema: [String: Any]) throws -> AnySequence<ValidationError> {
   guard try context.descend(instance: instance, subschema: not).isValid else {
     return AnySequence(EmptyCollection())
   }
 
+  let message = String(format: NSLocalizedString("'%@' does not match 'not' validation.", comment: ""), "\(instance)")
   return AnySequence([
     ValidationError(
-      "'\(instance)' does not match 'not' validation.",
+      message,
       instanceLocation: context.instanceLocation,
       keywordLocation: context.keywordLocation
     )

Sources/Applicators/oneOf.swift

@@ -1,12 +1,16 @@
+import Foundation
+
+
 func oneOf(context: Context, oneOf: Any, instance: Any, schema: [String: Any]) throws -> AnySequence<ValidationError> {
   guard let oneOf = oneOf as? [Any] else {
     return AnySequence(EmptyCollection())
   }
 
   if try oneOf.filter({ try context.descend(instance: instance, subschema: $0).isValid }).count != 1 {
+    let message = NSLocalizedString("Only one value from `oneOf` should be met.", comment: "")
     return AnySequence([
       ValidationError(
-        "Only one value from `oneOf` should be met",
+        message,
         instanceLocation: context.instanceLocation,
         keywordLocation: context.keywordLocation
       ),

Sources/Applicators/patternProperties.swift

@@ -25,9 +25,10 @@ func patternProperties(context: Context, patternProperties: Any, instance: Any,
         results.append(try context.descend(instance: instance[key]!, subschema: schema))
       }
     } catch {
+      let message = String(format: NSLocalizedString("'%@' is not a valid regex pattern for patternProperties.", comment: ""), pattern)
       return AnySequence([
         ValidationError(
-          "[Schema] '\(pattern)' is not a valid regex pattern for patternProperties",
+          message,
           instanceLocation: context.instanceLocation,
           keywordLocation: context.keywordLocation
         ),

Sources/Format/date.swift

@@ -5,10 +5,11 @@ func validateDate(_ context: Context, _ value: String) -> AnySequence<Validation
   if let regularExpression = try? NSRegularExpression(pattern: "^\\d{4}-\\d{2}-\\d{2}$", options: []) {
     let range = NSRange(location: 0, length: value.utf16.count)
     let result = regularExpression.matches(in: value, options: [], range: range)
-    if result.isEmpty  {
+    if result.isEmpty {
+      let message = String(format: NSLocalizedString("'%@' is not a valid RFC 3339 formatted date.", comment: ""), value)
       return AnySequence([
         ValidationError(
-          "'\(value)' is not a valid RFC 3339 formatted date.",
+          message,
           instanceLocation: context.instanceLocation,
           keywordLocation: context.keywordLocation
         )
@@ -23,9 +24,10 @@ func validateDate(_ context: Context, _ value: String) -> AnySequence<Validation
     return AnySequence(EmptyCollection())
   }
 
+  let message = String(format: NSLocalizedString("'%@' is not a valid RFC 3339 formatted date.", comment: ""), value)
   return AnySequence([
     ValidationError(
-      "'\(value)' is not a valid RFC 3339 formatted date.",
+      message,
       instanceLocation: context.instanceLocation,
       keywordLocation: context.keywordLocation
     )

Sources/Format/duration.swift

@@ -1,5 +1,6 @@
 import Foundation
 
+
 /*
 https://tools.ietf.org/html/rfc3339
 
@@ -17,6 +18,8 @@ Durations:
 
    duration          = "P" (dur-date / dur-time / dur-week)
 */
+
+
 var durationExpression: NSRegularExpression = {
   let second = "(\\d+S)"
   let minute = "((\\d+M)\(second)?)"
@@ -41,9 +44,10 @@ func isValidDuration(_ value: String) -> Bool {
 
 func validateDuration(_ context: Context, _ value: String) -> AnySequence<ValidationError> {
   guard isValidDuration(value) else {
+    let message = String(format: NSLocalizedString("'%@' is not a valid duration.", comment: ""), value)
     return AnySequence([
       ValidationError(
-        "'\(value)' is not a valid duration.",
+        message,
         instanceLocation: context.instanceLocation,
         keywordLocation: context.keywordLocation
       )

Sources/Format/time.swift

@@ -136,9 +136,10 @@ func validateTime(_ context: Context, _ value: String) -> AnySequence<Validation
     return AnySequence(EmptyCollection())
   }
 
+  let message = String(format: NSLocalizedString("'%@' is not a valid RFC 3339 formatted time.", comment: ""), value)
   return AnySequence([
     ValidationError(
-      "'\(value)' is not a valid RFC 3339 formatted time.",
+      message,
       instanceLocation: context.instanceLocation,
       keywordLocation: context.keywordLocation
     )

Sources/RefResolver.swift

@@ -1,7 +1,7 @@
 import Foundation
 
 func urlSplitFragment(url: String) -> (String, String) {
-  guard let hashIndex = url.index(of: "#") else {
+  guard let hashIndex = url.firstIndex(of: "#") else {
     return (url, "")
   }
 

Sources/Validation/const.swift

@@ -5,10 +5,11 @@ func const(context: Context, const: Any, instance: Any, schema: [String: Any]) -
   if isEqual(instance as! NSObject, const as! NSObject) {
      return AnySequence(EmptyCollection())
   }
-
+
+  let message = String(format: NSLocalizedString("'%@' is not equal to const '%@'", comment: ""), "\(instance)", "\(const)")
   return AnySequence([
     ValidationError(
-      "'\(instance)' is not equal to const '\(const)'",
+      message,
       instanceLocation: context.instanceLocation,
       keywordLocation: context.keywordLocation
     )

Sources/Validation/enum.swift

@@ -11,9 +11,10 @@ func `enum`(context: Context, enum: Any, instance: Any, schema: [String: Any]) -
     return AnySequence(EmptyCollection())
   }
 
+  let message = String(format: NSLocalizedString("'%@' is not a valid enumeration value of '%@'", comment: ""), "\(instance)", "\(`enum`)")
   return AnySequence([
     ValidationError(
-      "'\(instance)' is not a valid enumeration value of '\(`enum`)'",
+      message,
       instanceLocation: context.instanceLocation,
       keywordLocation: context.keywordLocation
     )

Sources/Validation/minMaxItems.swift

@@ -1,3 +1,6 @@
+import Foundation
+
+
 func validateArrayLength(_ context: Context, _ rhs: Int, comparitor: @escaping ((Int, Int) -> Bool), error: String) -> (_ value: Any) -> AnySequence<ValidationError> {
   return { value in
     if let value = value as? [Any] {
@@ -22,14 +25,16 @@ func minItems(context: Context, minItems: Any, instance: Any, schema: [String: A
     return AnySequence(EmptyCollection())
   }
 
-  return validateArrayLength(context, minItems, comparitor: >=, error: "Length of array is smaller than the minimum \(minItems)")(instance)
+  let message = String(format: NSLocalizedString("Length of array is smaller than the minimum %@", comment: ""), "\(minItems)")
+  return validateArrayLength(context, minItems, comparitor: >=, error: message)(instance)
 }
 
 
 func maxItems(context: Context, maxItems: Any, instance: Any, schema: [String: Any]) -> AnySequence<ValidationError> {
   guard let maxItems = maxItems as? Int else {
     return AnySequence(EmptyCollection())
   }
-
-  return validateArrayLength(context, maxItems, comparitor: <=, error: "Length of array is greater than maximum \(maxItems)")(instance)
+
+  let message = String(format: NSLocalizedString("Length of array is greater than maximum %@", comment: ""), "\(maxItems)")
+  return validateArrayLength(context, maxItems, comparitor: <=, error: message)(instance)
 }

Sources/Validation/minMaxLength.swift

@@ -1,3 +1,6 @@
+import Foundation
+
+
 func validateLength(_ context: Context, _ comparitor: @escaping ((Int, Int) -> (Bool)), length: Int, error: String) -> (_ value: Any) -> AnySequence<ValidationError> {
   return { value in
     if let value = value as? String {
@@ -22,7 +25,8 @@ func minLength(context: Context, minLength: Any, instance: Any, schema: [String:
     return AnySequence(EmptyCollection())
   }
 
-  return validateLength(context, >=, length: minLength, error: "Length of string is smaller than minimum length \(minLength)")(instance)
+  let message = String(format: NSLocalizedString("Length of string is smaller than minimum length %@", comment: ""), "\(minLength)")
+  return validateLength(context, >=, length: minLength, error: message)(instance)
 }
 
 
@@ -31,5 +35,6 @@ func maxLength(context: Context, maxLength: Any, instance: Any, schema: [String:
     return AnySequence(EmptyCollection())
   }
 
-  return validateLength(context, <=, length: maxLength, error: "Length of string is larger than max length \(maxLength)")(instance)
+  let message = String(format: NSLocalizedString("Length of string is larger than max length %@", comment: ""), "\(maxLength)")
+  return validateLength(context, <=, length: maxLength, error: message)(instance)
 }

Sources/Validation/minMaxNumber.swift

@@ -1,3 +1,6 @@
+import Foundation
+
+
 func validateNumericLength(_ context: Context, _ length: Double, comparitor: @escaping ((Double, Double) -> (Bool)), exclusiveComparitor: @escaping ((Double, Double) -> (Bool)), exclusive: Bool?, error: String) -> (_ value: Any) -> AnySequence<ValidationError> {
   return { value in
     if let value = value as? Double {
@@ -34,7 +37,8 @@ func minimumDraft4(context: Context, minimum: Any, instance: Any, schema: [Strin
     return AnySequence(EmptyCollection())
   }
 
-  return validateNumericLength(context, minimum, comparitor: >=, exclusiveComparitor: >, exclusive: schema["exclusiveMinimum"] as? Bool, error: "Value is lower than minimum value of \(minimum)")(instance)
+  let message = String(format: NSLocalizedString("Value is lower than minimum value of %@", comment: ""), "\(minimum)")
+  return validateNumericLength(context, minimum, comparitor: >=, exclusiveComparitor: >, exclusive: schema["exclusiveMinimum"] as? Bool, error: message)(instance)
 }
 
 
@@ -43,7 +47,8 @@ func maximumDraft4(context: Context, maximum: Any, instance: Any, schema: [Strin
     return AnySequence(EmptyCollection())
   }
 
-  return validateNumericLength(context, maximum, comparitor: <=, exclusiveComparitor: <, exclusive: schema["exclusiveMaximum"] as? Bool, error: "Value exceeds maximum value of \(maximum)")(instance)
+  let message = String(format: NSLocalizedString("Value exceeds maximum value of %@", comment: ""), "\(maximum)")
+  return validateNumericLength(context, maximum, comparitor: <=, exclusiveComparitor: <, exclusive: schema["exclusiveMaximum"] as? Bool, error: message)(instance)
 }
 
 
@@ -52,7 +57,8 @@ func minimum(context: Context, minimum: Any, instance: Any, schema: [String: Any
     return AnySequence(EmptyCollection())
   }
 
-  return validateNumericLength(context, minimum, comparitor: >=, exclusiveComparitor: >, exclusive: false, error: "Value is lower than minimum value of \(minimum)")(instance)
+  let message = String(format: NSLocalizedString("Value is lower than minimum value of %@", comment: ""), "\(minimum)")
+  return validateNumericLength(context, minimum, comparitor: >=, exclusiveComparitor: >, exclusive: false, error: message)(instance)
 }
 
 
@@ -61,7 +67,8 @@ func maximum(context: Context, maximum: Any, instance: Any, schema: [String: Any
     return AnySequence(EmptyCollection())
   }
 
-  return validateNumericLength(context, maximum, comparitor: <=, exclusiveComparitor: <, exclusive: false, error: "Value exceeds maximum value of \(maximum)")(instance)
+  let message = String(format: NSLocalizedString("Value exceeds maximum value of %@", comment: ""), "\(maximum)")
+  return validateNumericLength(context, maximum, comparitor: <=, exclusiveComparitor: <, exclusive: false, error: message)(instance)
 }
 
 
@@ -70,7 +77,8 @@ func exclusiveMinimum(context: Context, minimum: Any, instance: Any, schema: [St
     return AnySequence(EmptyCollection())
   }
 
-  return validateNumericLength(context, minimum, comparitor: >=, exclusiveComparitor: >, exclusive: true, error: "Value is lower than exclusive minimum value of \(minimum)")(instance)
+  let message = String(format: NSLocalizedString("Value is lower than exclusive minimum value of %@", comment: ""), "\(minimum)")
+  return validateNumericLength(context, minimum, comparitor: >=, exclusiveComparitor: >, exclusive: true, error: message)(instance)
 }
 
 
@@ -79,5 +87,6 @@ func exclusiveMaximum(context: Context, maximum: Any, instance: Any, schema: [St
     return AnySequence(EmptyCollection())
   }
 
-  return validateNumericLength(context, maximum, comparitor: <=, exclusiveComparitor: <, exclusive: true, error: "Value exceeds exclusive maximum value of \(maximum)")(instance)
+  let message = String(format: NSLocalizedString("Value exceeds exclusive maximum value of %@", comment: ""), "\(maximum)")
+  return validateNumericLength(context, maximum, comparitor: <=, exclusiveComparitor: <, exclusive: true, error: message)(instance)
 }

Sources/Validation/minMaxProperties.swift

@@ -1,3 +1,6 @@
+import Foundation
+
+
 func validatePropertiesLength(_ context: Context, _ length: Int, comparitor: @escaping ((Int, Int) -> (Bool)), error: String) -> (_ value: Any) -> AnySequence<ValidationError> {
   return { value in
     if let value = value as? [String: Any] {
@@ -21,8 +24,9 @@ func minProperties(context: Context, minProperties: Any, instance: Any, schema:
   guard let minProperties = minProperties as? Int else {
     return AnySequence(EmptyCollection())
   }
-
-  return validatePropertiesLength(context, minProperties, comparitor: <=, error: "Amount of properties is less than the required amount")(instance)
+
+  let message = NSLocalizedString("Amount of properties is less than the required amount", comment: "")
+  return validatePropertiesLength(context, minProperties, comparitor: <=, error: message)(instance)
 }
 
 
@@ -31,5 +35,6 @@ func maxProperties(context: Context, maxProperties: Any, instance: Any, schema:
     return AnySequence(EmptyCollection())
   }
 
-  return validatePropertiesLength(context, maxProperties, comparitor: >=, error: "Amount of properties is greater than maximum permitted")(instance)
+  let message = NSLocalizedString("Amount of properties is greater than maximum permitted", comment: "")
+  return validatePropertiesLength(context, maxProperties, comparitor: >=, error: message)(instance)
 }

Sources/Validation/multipleOf.swift

@@ -12,9 +12,10 @@ func multipleOf(context: Context, multipleOf: Any, instance: Any, schema: [Strin
 
   let result = instance / multipleOf
   if result != floor(result) {
+    let message = String(format: NSLocalizedString("%@ is not a multiple of %@", comment: ""), "\(instance)", "\(multipleOf)")
     return AnySequence([
       ValidationError(
-        "\(instance) is not a multiple of \(multipleOf)",
+        message,
         instanceLocation: context.instanceLocation,
         keywordLocation: context.keywordLocation
       )