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Pfeil, Scott Robert 2020-01-13 09:38:40 -05:00
parent e2885b0f78
commit a9da777f56
1 changed files with 65 additions and 16 deletions
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81
MVMCore/MVMCore/Models/Model/ModelRegistry.swift
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@ -75,22 +75,7 @@ extension KeyedDecodingContainer where Key: CodingKey {
guard var container = try? nestedUnkeyedContainer(forKey: codingKey) else {
return nil
}
var models = [Model]()
var containerCopy = container
while !container.isAtEnd {
let nestedContainer = try container.nestedContainer(keyedBy: TypeKey.self)
if let identifier = try nestedContainer.decodeIfPresent(String.self, forKey: typeCodingKey) {
//get the type
guard let type = ModelRegistry.getType(for: identifier) else {
throw ModelRegistry.Error.decoderErrorModelNotMapped
}
//now get the decoder to use for the type
let decoder = try containerCopy.superDecoder()
let model = try type.init(from: decoder)
models.append(model)
}
}
return models
return try container.decodeModelsIfPresent(typeCodingKey: typeCodingKey)
}
/// Decodes an array of registered model based on the identifiers.
@ -100,6 +85,22 @@ extension KeyedDecodingContainer where Key: CodingKey {
}
return models
}
/// Decodes an array with arrays of models based on the identifiers, optional.
public func decodeModels2DIfPresent<TypeKey: CodingKey>(codingKey: KeyedDecodingContainer<K>.Key, typeCodingKey: TypeKey) throws -> [[Model]]? {
guard var container = try? nestedUnkeyedContainer(forKey: codingKey) else {
return nil
}
return try container.decodeModels2DIfPresent(typeCodingKey: typeCodingKey)
}
/// Decodes an array with arrays of models based on the identifiers.
public func decodeModels2D<TypeKey: CodingKey>(codingKey: KeyedDecodingContainer<K>.Key, typeCodingKey: TypeKey) throws -> [[Model]] {
guard let models: [[Model]] = try decodeModels2DIfPresent(codingKey: codingKey, typeCodingKey: typeCodingKey) else {
throw ModelRegistry.Error.decoderErrorObjectNotPresent
}
return models
}
}
extension KeyedEncodingContainer where Key: CodingKey {
@ -131,4 +132,52 @@ extension KeyedEncodingContainer where Key: CodingKey {
try model.encode(unkeyedContainer: &unkeyedContainer)
}
}
/// Convenience function for encoding the container into a list of lists of Models. needs instance type as input paramaeter list
public mutating func encodeModels2D(_ list: [[Model]]?, forKey key:KeyedEncodingContainer<K>.Key) throws {
guard let list = list else { return }
var unkeyedContainer = self.nestedUnkeyedContainer(forKey: key)
for models in list {
var arrayunkeyedContainer = unkeyedContainer.nestedUnkeyedContainer()
for model in models {
try model.encode(unkeyedContainer: &arrayunkeyedContainer)
}
}
}
}
extension UnkeyedDecodingContainer {
/// Decodes the container into a list of Models.
public mutating func decodeModelsIfPresent<TypeKey: CodingKey>(typeCodingKey: TypeKey) throws -> [Model]? {
var models = [Model]()
var containerCopy = self
while !containerCopy.isAtEnd {
let nestedContainer = try containerCopy.nestedContainer(keyedBy: TypeKey.self)
if let identifier = try nestedContainer.decodeIfPresent(String.self, forKey: typeCodingKey) {
//get the type
guard let type = ModelRegistry.getType(for: identifier) else {
throw ModelRegistry.Error.decoderErrorModelNotMapped
}
//now get the decoder to use for the type
let decoder = try self.superDecoder()
let model = try type.init(from: decoder)
models.append(model)
}
}
return models
}
/// Convenience function for decoding the container into a list of lists of Models.
public mutating func decodeModels2DIfPresent<TypeKey: CodingKey>(typeCodingKey: TypeKey) throws -> [[Model]]? {
var modelLists = [[Model]]()
var containerCopy = self
while !containerCopy.isAtEnd {
var arraycontainerCopy = try containerCopy.nestedUnkeyedContainer()
guard let models = try arraycontainerCopy.decodeModelsIfPresent(typeCodingKey: typeCodingKey) else {
throw ModelRegistry.Error.decoderErrorModelNotMapped
}
modelLists.append(models)
}
return modelLists
}
}