1 files changed, 55 insertions, 0 deletions
diff --git a/src/main/kotlin/moe/nea/shot/Shots.kt b/src/main/kotlin/moe/nea/shot/Shots.kt
new file mode 100644
index 0000000..b0956b4
--- /dev/null
+++ b/src/main/kotlin/moe/nea/shot/Shots.kt
@@ -0,0 +1,55 @@
+package moe.nea.shot
+
+import org.objectweb.asm.ClassReader
+import org.objectweb.asm.ClassWriter
+import java.io.Serializable
+import java.nio.file.Files
+import java.nio.file.Path
+import java.util.zip.ZipFile
+import java.util.zip.ZipOutputStream
+import kotlin.io.path.createDirectories
+import kotlin.io.path.exists
+
+data class Shots(
+    val injections: Map<ClassRef, ClassShots>,
+) : Serializable {
+
+    fun processEntry(toInject: ClassShots, bytes: ByteArray): ByteArray {
+        val classReader = ClassReader(bytes)
+        val classWriter = ClassWriter(0)
+        val visitor = InjectionApplicator(toInject, classWriter)
+        classReader.accept(visitor, 0)
+        return classWriter.toByteArray()
+    }
+
+    fun processZipFile(input: ZipFile, output: ZipOutputStream) {
+        for (entry in input.entries()) {
+            val classRef = ClassRef.fromPath(entry.name)
+            val toInject = classRef?.let(injections::get)
+            output.putNextEntry(entry)
+            if (toInject == null) {
+                input.getInputStream(entry).copyTo(output)
+            } else {
+                val bytes = input.getInputStream(entry).use { it.readBytes() }
+                val modifiedBytes = processEntry(toInject, bytes)
+                output.write(modifiedBytes)
+            }
+        }
+    }
+
+
+    /**
+     * Run on an extracted zip, (or alternatively, a jar file systems root path)
+     */
+    fun process(sourceFiles: Path, targetFiles: Path) {
+        for ((classRef, toInject) in injections.entries) {
+            val classSource = sourceFiles.resolve(classRef.path)
+            val classTarget = targetFiles.resolve(classRef.path)
+            if (!classSource.exists()) {
+                continue
+            }
+            classTarget.parent.createDirectories()
+            Files.write(classTarget, processEntry(toInject, Files.readAllBytes(classSource)))
+        }
+    }
+}
+\ No newline at end of file