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Merge pull request #295 from player-ui/iOS-Async-Node-Plugin
AsyncNodePlugin- use named export, port iOS plugin
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142 changes: 142 additions & 0 deletions
142
ios/plugins/AsyncNodePlugin/Sources/AsyncNodePlugin.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| // | ||
| // AsyncNodePlugin.swift | ||
| // PlayerUI | ||
| // | ||
| // Created by Zhao Xia Wu on 2024-02-05. | ||
| // | ||
|
|
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| import Foundation | ||
| import JavaScriptCore | ||
|
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| public typealias AsyncHookHandler = (JSValue) async throws -> AsyncNodeHandlerType | ||
|
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| public enum AsyncNodeHandlerType { | ||
| case multiNode([ReplacementNode]) | ||
| case singleNode(ReplacementNode) | ||
| } | ||
|
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| /** | ||
| Wraps the core AsyncNodePlugin and taps into the `onAsyncNode` hook to allow asynchronous replacement of the node object that contains `async` | ||
| */ | ||
| public class AsyncNodePlugin: JSBasePlugin, NativePlugin { | ||
| public var hooks: AsyncNodeHook? | ||
|
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| private var asyncHookHandler: AsyncHookHandler? | ||
|
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| /** | ||
| Constructs the AsyncNodePlugin | ||
| - Parameters: | ||
| - handler: The callback that is used to tap into the core `onAsyncNode` hook | ||
| exposed to users of the plugin allowing them to supply the replacement node used in the tap callback | ||
| */ | ||
| public convenience init(_ handler: @escaping AsyncHookHandler) { | ||
| self.init(fileName: "async-node-plugin.prod", pluginName: "AsyncNodePlugin.AsyncNodePlugin") | ||
| self.asyncHookHandler = handler | ||
| } | ||
|
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| override public func setup(context: JSContext) { | ||
| super.setup(context: context) | ||
|
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| if let pluginRef = self.pluginRef { | ||
| self.hooks = AsyncNodeHook(onAsyncNode: AsyncHook(baseValue: pluginRef, name: "onAsyncNode")) | ||
| } | ||
|
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| hooks?.onAsyncNode.tap({ node in | ||
| // hook value is the original node | ||
| guard let asyncHookHandler = self.asyncHookHandler else { | ||
| return JSValue() | ||
| } | ||
|
|
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| let replacementNode = try await (asyncHookHandler)(node) | ||
|
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| switch replacementNode { | ||
| case .multiNode(let replacementNodes): | ||
| let jsValueArray = replacementNodes.compactMap({ node in | ||
| switch node { | ||
| case .concrete(let jsValue): | ||
| return jsValue | ||
| case .encodable(let encodable): | ||
| let encoder = JSONEncoder() | ||
| do { | ||
| let res = try encoder.encode(encodable) | ||
| return context.evaluateScript("(\(String(data: res, encoding: .utf8) ?? ""))") as JSValue | ||
| } catch { | ||
| return nil | ||
| } | ||
| } | ||
| }) | ||
|
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| return context.objectForKeyedSubscript("Array").objectForKeyedSubscript("from").call(withArguments: [jsValueArray]) | ||
|
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| case .singleNode(let replacementNode): | ||
| switch replacementNode { | ||
|
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| case .encodable(let encodable): | ||
| let encoder = JSONEncoder() | ||
| do { | ||
| let res = try encoder.encode(encodable) | ||
| return context.evaluateScript("(\(String(data: res, encoding: .utf8) ?? ""))") as JSValue | ||
| } catch { | ||
| break | ||
| } | ||
| case .concrete(let jsValue): | ||
| return jsValue | ||
| } | ||
| } | ||
|
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| return nil | ||
| }) | ||
| } | ||
|
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| override open func getUrlForFile(fileName: String) -> URL? { | ||
| ResourceUtilities.urlForFile(name: fileName, ext: "js", bundle: Bundle(for: AsyncNodePlugin.self), pathComponent: "AsyncNodePlugin.bundle") | ||
| } | ||
| } | ||
|
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| public struct AsyncNodeHook { | ||
| public let onAsyncNode: AsyncHook<JSValue> | ||
| } | ||
|
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| /** | ||
| Replacement node that the callback of this plugin expects, users can supply either a JSValue or an Encodable object that gets converted to a JSValue in the `setup` | ||
| */ | ||
| public enum ReplacementNode: Encodable { | ||
| case concrete(JSValue) | ||
| case encodable(Encodable) | ||
|
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| public func encode(to encoder: Encoder) throws { | ||
| var container = encoder.singleValueContainer() | ||
|
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| switch self { | ||
| case .encodable(let value): | ||
| try container.encode(value) | ||
| case .concrete( _): | ||
| break | ||
| } | ||
| } | ||
| } | ||
|
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| public struct AssetPlaceholderNode: Encodable { | ||
| public enum CodingKeys: String, CodingKey { | ||
| case asset | ||
| } | ||
|
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| var asset: Encodable | ||
| public init(asset: Encodable) { | ||
| self.asset = asset | ||
| } | ||
|
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| public func encode(to encoder: Encoder) throws { | ||
| var container = encoder.container(keyedBy: CodingKeys.self) | ||
| try? container.encode(asset, forKey: .asset) | ||
| } | ||
| } | ||
|
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| public struct AsyncNode: Codable, Equatable { | ||
| var id: String | ||
| var async: Bool = true | ||
|
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| public init(id: String) { | ||
| self.id = id | ||
| } | ||
| } |
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