feat: ResourceUtils helper class

src/main/kotlin/app/revanced/util/resources/ResourceUtils.kt

@@ -0,0 +1,75 @@
+package app.revanced.util.resources
+
+import app.revanced.patcher.data.impl.DomFileEditor
+import app.revanced.patcher.data.impl.ResourceData
+import java.io.OutputStream
+import java.nio.file.Files
+
+internal object ResourceUtils {
+    /**
+     * Copy resources from the current class loader to the resource directory.
+     * @param sourceResourceDirectory The source resource directory name.
+     * @param resources The resources to copy.
+     */
+    internal fun ResourceData.copyResources(sourceResourceDirectory: String, vararg resources: ResourceGroup) {
+        val classLoader = ResourceUtils.javaClass.classLoader
+        val targetResourceDirectory = this["res"]
+
+        for (resourceGroup in resources) {
+            resourceGroup.resources.forEach { resource ->
+                val resourceFile = "${resourceGroup.resourceDirectoryName}/$resource"
+                Files.copy(
+                    classLoader.getResourceAsStream("$sourceResourceDirectory/$resourceFile")!!,
+                    targetResourceDirectory.resolve(resourceFile).toPath()
+                )
+            }
+        }
+    }
+
+    /**
+     * Resource names mapped to their corresponding resource data.
+     * @param resourceDirectoryName The name of the directory of the resource.
+     * @param resources A list of resource names.
+     */
+    internal class ResourceGroup(val resourceDirectoryName: String, vararg val resources: String)
+
+    /**
+     * Copy resources from the current class loader to the resource directory.
+     * @param resourceDirectory The directory of the resource.
+     * @param targetResource The target resource.
+     * @param elementTag The element to copy.
+     */
+    internal fun ResourceData.copyXmlNode(resourceDirectory: String, targetResource: String, elementTag: String) {
+        val stringsResourceInputStream = ResourceUtils.javaClass.classLoader.getResourceAsStream("$resourceDirectory/$targetResource")!!
+
+        // Copy nodes from the resources node to the real resource node
+        elementTag.copyXmlNode(
+            this.xmlEditor[stringsResourceInputStream, OutputStream.nullOutputStream()],
+            this.xmlEditor["res/$targetResource"]
+        ).close()
+    }
+
+    /**
+     * Copies the specified node of the source [DomFileEditor] to the target [DomFileEditor].
+     * @param source the source [DomFileEditor].
+     * @param target the target [DomFileEditor]-
+     * @return AutoCloseable that closes the target [DomFileEditor]s.
+     */
+    internal fun String.copyXmlNode(source: DomFileEditor, target: DomFileEditor): AutoCloseable {
+        val hostNodes = source.file.getElementsByTagName(this).item(0).childNodes
+
+        val destinationResourceFile = target.file
+        val destinationNode = destinationResourceFile.getElementsByTagName(this).item(0)
+
+        for (index in 0 until hostNodes.length) {
+            val node = hostNodes.item(index).cloneNode(true)
+            destinationResourceFile.adoptNode(node)
+            destinationNode.appendChild(node)
+        }
+
+        return AutoCloseable {
+            source.close()
+            target.close()
+        }
+    }
+}