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Assets/UniWebView/Editor/UniWebViewPostBuildProcessor.cs

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+using UnityEditor;
+using UnityEditor.Android;
+using UnityEngine;
+using System.IO;
+using System.Text;
+
+
+class UniWebViewPostBuildProcessor : IPostGenerateGradleAndroidProject
+{
+    public int callbackOrder { get { return 1; } }
+    public void OnPostGenerateGradleAndroidProject(string path) {
+        Debug.Log("<UniWebView> UniWebView Post Build Scirpt is patching manifest file and gradle file...");
+        PatchAndroidManifest(path);
+        PatchBuildGradle(path);
+        PatchGradleProperty(path);
+    }
+
+    private void PatchAndroidManifest(string root) {
+        var manifestFilePath = GetManifestFilePath(root);
+        var manifest = new UniWebViewAndroidManifest(manifestFilePath);
+        
+        var changed = false;
+        
+        Debug.Log("<UniWebView> Set hardware accelerated to enable smooth web view experience and HTML5 support like video and canvas.");
+        changed = manifest.SetHardwareAccelerated() || changed;
+
+        var settings = UniWebViewEditorSettings.GetOrCreateSettings();
+        if (settings.usesCleartextTraffic) {
+            changed = manifest.SetUsesCleartextTraffic() || changed;
+        }
+        if (settings.writeExternalStorage) {
+            changed = manifest.AddWriteExternalStoragePermission() || changed;
+        }
+        if (settings.accessFineLocation) {
+            changed = manifest.AddAccessFineLocationPermission() || changed;
+        }
+
+        if (changed) {
+            manifest.Save();
+        }
+    }
+
+    private void PatchBuildGradle(string root) {
+        var gradleFilePath = GetGradleFilePath(root);
+        var config = new UniWebViewGradleConfig(gradleFilePath);
+
+        var kotlinPrefix = "implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:";
+        var kotlinVersion = "1.4.31'";
+
+        var browserPrefix = "implementation 'androidx.browser:browser:";
+        var browserVersion = "1.2.0'";
+
+        var settings = UniWebViewEditorSettings.GetOrCreateSettings();
+
+        var dependenciesNode = config.ROOT.FindChildNodeByName("dependencies");
+        if (dependenciesNode != null) {
+            // Add kotlin
+            if (settings.addsKotlin) {
+                dependenciesNode.ReplaceContenOrAddStartsWith(kotlinPrefix, kotlinPrefix + kotlinVersion);
+                Debug.Log("<UniWebView> Updated Kotlin dependency in build.gradle.");
+            }
+
+            // Add browser package
+            if (settings.addsAndroidBrowser) {
+                dependenciesNode.ReplaceContenOrAddStartsWith(browserPrefix, browserPrefix + browserVersion);
+                Debug.Log("<UniWebView> Updated Browser dependency in build.gradle.");
+            }
+        } else {
+            Debug.LogError("UniWebViewPostBuildProcessor didn't find the `dependencies` field in build.gradle.");
+            Debug.LogError("Although we can continue to add a `dependencies`, make sure you have setup Gradle and the template correctly.");
+
+            var newNode = new UniWebViewGradleNode("dependencies", config.ROOT);
+            if (settings.addsKotlin) {
+                newNode.AppendContentNode(kotlinPrefix + kotlinVersion);
+            }
+            if (settings.addsAndroidBrowser) {
+                newNode.AppendContentNode(browserPrefix + browserVersion);
+            }
+            newNode.AppendContentNode("implementation(name: 'UniWebView', ext:'aar')");
+            config.ROOT.AppendChildNode(newNode);
+        }
+        config.Save();
+    }
+
+    private void PatchGradleProperty(string root) {
+        var gradlePropertyFilePath = GetGradlePropertyFilePath(root);
+        UniWebViewGradlePropertyPatcher.Patch(gradlePropertyFilePath);
+    }
+
+    private string CombinePaths(string[] paths) {
+        var path = "";
+        foreach (var item in paths) {
+            path = Path.Combine(path, item);
+        }
+        return path;
+    }
+
+    private string GetManifestFilePath(string root) {
+        string[] comps = {root, "src", "main", "AndroidManifest.xml"};
+        return CombinePaths(comps);
+    }
+
+    private string GetGradleFilePath(string root) {
+        string[] comps = {root, "build.gradle"};
+        return CombinePaths(comps);
+    }
+
+    private string GetGradlePropertyFilePath(string root) {
+        #if UNITY_2019_3_OR_NEWER
+        string[] compos = {root, "..", "gradle.properties"};
+        #else
+        string[] compos = {root, "gradle.properties"};
+        #endif
+        return CombinePaths(compos);
+    }
+}