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143 changes: 143 additions & 0 deletions
143
android/app/src/main/java/it/airgap/vault/plugin/isolatedmodules/IsolatedProtocol.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| package it.airgap.vault.plugin.isolatedmodules | ||
|
|
||
| import android.webkit.WebView | ||
| import androidx.lifecycle.lifecycleScope | ||
| import com.getcapacitor.* | ||
| import com.getcapacitor.annotation.CapacitorPlugin | ||
| import it.airgap.vault.util.JSCompletableDeferred | ||
| import it.airgap.vault.util.JSUndefined | ||
| import it.airgap.vault.util.addJavascriptInterface | ||
| import it.airgap.vault.util.assertReceived | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.launch | ||
| import kotlinx.coroutines.withContext | ||
|
|
||
| @CapacitorPlugin | ||
| class IsolatedProtocol : Plugin() { | ||
|
|
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| @PluginMethod | ||
| fun getField(call: PluginCall) { | ||
| with(call) { | ||
| assertReceived(Param.IDENTIFIER, Param.KEY) | ||
|
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| activity.lifecycleScope.launch(Dispatchers.Default) { | ||
| call.resolve(getField(identifier, options, key)) | ||
| } | ||
| } | ||
| } | ||
|
|
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| @PluginMethod | ||
| fun callMethod(call: PluginCall) { | ||
| with(call) { | ||
| assertReceived(Param.IDENTIFIER, Param.KEY) | ||
|
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| activity.lifecycleScope.launch(Dispatchers.Default) { | ||
| call.resolve(callMethod(identifier, options, key, args?.replaceNullWithUndefined())) | ||
| } | ||
| } | ||
| } | ||
|
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| private suspend fun getField(identifier: String, options: JSObject?, key: String): Result<JSObject> = | ||
| spawnCoinlibWebView(identifier, options, JSProtocolAction.GetField, """ | ||
| var __platform__field = '$key' | ||
| """.trimIndent()) | ||
|
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| private suspend fun callMethod(identifier: String, options: JSObject?, key: String, args: JSArray?): Result<JSObject> { | ||
| val args = args?.toString() ?: "[]" | ||
|
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| return spawnCoinlibWebView(identifier, options, JSProtocolAction.CallMethod, """ | ||
| var __platform__method = '$key' | ||
| var __platform__args = $args | ||
| """.trimIndent()) | ||
| } | ||
|
|
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| private suspend fun spawnCoinlibWebView( | ||
| identifier: String, | ||
| options: JSObject?, | ||
| action: JSProtocolAction, | ||
| script: String? = null, | ||
| ): Result<JSObject> { | ||
| val webViewContext = Dispatchers.Main | ||
|
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| val resultDeferred = JSCompletableDeferred("resultDeferred") | ||
| val webView = withContext(webViewContext) { | ||
| WebView(context).apply { | ||
| settings.javaScriptEnabled = true | ||
| addJavascriptInterface(resultDeferred) | ||
| } | ||
| } | ||
|
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| val html = """ | ||
| <script type="text/javascript"> | ||
| var __platform__identifier = '$identifier' | ||
| var __platform__options = ${options.orUndefined()} | ||
| var __platform__action = '${action.value}' | ||
| ${script ?: ""} | ||
| function __platform__handleError(error) { | ||
| ${resultDeferred.name}.throwFromJS(error) | ||
| } | ||
| function __platform__handleResult(result) { | ||
| ${resultDeferred.name}.completeFromJS(JSON.stringify({ result })) | ||
| } | ||
| </script> | ||
| <script src="$ASSETS_PATH/$COINLIB_SOURCE" type="text/javascript"></script> | ||
| <script src="$ASSETS_PATH/$COMMON_SOURCE" type="text/javascript"></script> | ||
| """.trimIndent() | ||
|
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| withContext(webViewContext) { | ||
| webView.loadDataWithBaseURL( | ||
| ASSETS_PATH, | ||
| html, | ||
| "text/html", | ||
| "utf-8", | ||
| null, | ||
| ) | ||
| } | ||
|
|
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| return resultDeferred.await() | ||
| } | ||
|
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| private fun JSObject?.orUndefined(): Any = this ?: JSUndefined | ||
|
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| private fun JSArray.replaceNullWithUndefined(): JSArray = | ||
| JSArray(toList<Any>().map { if (it == JSObject.NULL) JSUndefined else it }) | ||
|
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| private fun PluginCall.resolve(result: Result<JSObject>) { | ||
| result.onSuccess { resolve(it) } | ||
| result.onFailure { errorCallback(it.message) } | ||
| } | ||
|
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| private val PluginCall.identifier: String | ||
| get() = getString(Param.IDENTIFIER)!! | ||
|
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| private val PluginCall.options: JSObject? | ||
| get() = getObject(Param.OPTIONS, null) | ||
|
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| private val PluginCall.key: String | ||
| get() = getString(Param.KEY)!! | ||
|
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| private val PluginCall.args: JSArray? | ||
| get() = getArray(Param.ARGS, null) | ||
|
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| private enum class JSProtocolAction(val value: String) { | ||
| GetField("getField"), | ||
| CallMethod("callMethod") | ||
| } | ||
|
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| private object Param { | ||
| const val IDENTIFIER = "identifier" | ||
| const val OPTIONS = "options" | ||
| const val KEY = "key" | ||
| const val ARGS = "args" | ||
| } | ||
|
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| companion object { | ||
| private const val ASSETS_PATH: String = "file:///android_asset" | ||
|
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| private const val COINLIB_SOURCE: String = "public/assets/libs/airgap-coin-lib.browserify.js" | ||
| private const val COMMON_SOURCE: String = "public/assets/native/isolated_modules/protocol_common.js" | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| package it.airgap.vault.util | ||
|
|
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| import android.webkit.JavascriptInterface | ||
| import com.getcapacitor.JSObject | ||
| import kotlinx.coroutines.CompletableDeferred | ||
| import java.util.* | ||
|
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| @Suppress("PrivatePropertyName") | ||
| val JSUndefined: Any by lazy { | ||
| object : Any() { | ||
| override fun equals(other: Any?): Boolean = other == this || other?.equals(null) ?: true | ||
| override fun hashCode(): Int = Objects.hashCode(null) | ||
| override fun toString(): String = "undefined" | ||
| } | ||
| } | ||
|
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| class JSCompletableDeferred(val name: String) : CompletableDeferred<Result<JSObject>> by CompletableDeferred() { | ||
| @JavascriptInterface | ||
| fun completeFromJS(value: String) { | ||
| complete(Result.success(JSObject(value))) | ||
| } | ||
|
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| @JavascriptInterface | ||
| fun throwFromJS(error: String) { | ||
| complete(Result.failure(JSException(error))) | ||
| } | ||
| } | ||
|
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| class JSException(message: String) : Exception(message) |
8 changes: 8 additions & 0 deletions
8
android/app/src/main/java/it/airgap/vault/util/WebViewExtensions.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| package it.airgap.vault.util | ||
|
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| import android.webkit.WebView | ||
|
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|
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| fun WebView.addJavascriptInterface(jsCompletableDeferred: JSCompletableDeferred) { | ||
| addJavascriptInterface(jsCompletableDeferred, jsCompletableDeferred.name) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| // | ||
| // JSValue+Additions.swift | ||
| // App | ||
| // | ||
| // Created by Julia Samol on 20.09.22. | ||
| // | ||
|
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| import Foundation | ||
| import Capacitor | ||
|
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| extension JSObject: JSONConvertible { | ||
|
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| func toJSONString() throws -> String { | ||
| guard JSONSerialization.isValidJSONObject(self) else { | ||
| throw JSError.invalidJSON | ||
| } | ||
|
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| let data = try JSONSerialization.data(withJSONObject: self, options: []) | ||
| return String(data: data, encoding: .utf8)! | ||
| } | ||
| } | ||
|
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| extension JSArray: JSONConvertible { | ||
|
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| func toJSONString() throws -> String { | ||
| let jsonEncoder = JSONEncoder() | ||
| let elements = try map { | ||
| if JSONSerialization.isValidJSONObject($0) { | ||
| let data = try JSONSerialization.data(withJSONObject: $0, options: []) | ||
| return String(data: data, encoding: .utf8)! | ||
| } else if let encodable = $0 as? Encodable { | ||
| let data = try jsonEncoder.encode(encodable) | ||
| return String(data: data, encoding: .utf8)! | ||
| } else if let jsonConvertible = $0 as? JSONConvertible { | ||
| return try jsonConvertible.toJSONString() | ||
| } else { | ||
| throw JSError.invalidJSON | ||
| } | ||
| } | ||
|
|
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| return "[\(elements.joined(separator: ","))]" | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| // | ||
| // WK+Additions.swift | ||
| // App | ||
| // | ||
| // Created by Julia Samol on 20.09.22. | ||
| // | ||
|
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| import Foundation | ||
| import WebKit | ||
|
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| extension WKUserContentController { | ||
|
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| func add(_ jsCallbackHandler: JSCallbackHandler) { | ||
| add(jsCallbackHandler, name: jsCallbackHandler.name) | ||
| } | ||
| } |
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