feat: add SignatureDownlaoder.kt

* Added automatic signatures downloader
* Refactor `utils` package.

src/main/kotlin/app/revanced/cli/Main.kt

@@ -1,9 +1,10 @@
 package app.revanced.cli
 
-import app.revanced.cli.utils.PatchLoader
-import app.revanced.cli.utils.Patches
+import app.revanced.cli.utils.patch.PatchLoader
+import app.revanced.cli.utils.patch.Patches
 import app.revanced.cli.utils.Preconditions
-import app.revanced.cli.utils.SignatureParser
+import app.revanced.cli.utils.signature.SignatureDownloader
+import app.revanced.cli.utils.signature.SignatureParser
 import app.revanced.patcher.Patcher
 import app.revanced.patcher.patch.PatchResult
 import kotlinx.cli.ArgParser
@@ -25,6 +26,7 @@ class Main {
             inPatches: String,
             inIntegrations: String?,
             inOutput: String,
+            downloadSignatures: Boolean? = true
         ) {
             val bar = ProgressBarBuilder()
                 .setTaskName("Working..")
@@ -34,6 +36,9 @@ class Main {
                 .build()
                 .maxHint(1)
                 .setExtraMessage("Initializing")
+
+            if(downloadSignatures) SignatureDownloader.download("youtube.signatures.json") // Not tested due private repos + not merged branches.
+
             val apk = Preconditions.isFile(inApk)
             val signatures = Preconditions.isFile(inSignatures)
             val patchesFile = Preconditions.isFile(inPatches)
@@ -129,6 +134,12 @@ class Main {
                 shortName = "o",
                 description = "Output directory"
             ).required()
+            val downloadSignatures by parser.option(
+                ArgType.Boolean,
+                fullName = "downloadSignatures",
+                shortName = "ds",
+                description = "Downloads signatures automatically."
+            )
 
             parser.parse(args)
             runCLI(
@@ -137,6 +148,7 @@ class Main {
                 patches,
                 integrations,
                 output,
+                downloadSignatures
             )
         }
     }

src/main/kotlin/app/revanced/cli/utils/patch/PatchLoader.kt

@@ -1,4 +1,4 @@
-package app.revanced.cli.utils
+package app.revanced.cli.utils.patch
 
 import java.io.File
 import java.net.URL

src/main/kotlin/app/revanced/cli/utils/patch/Patches.kt

@@ -1,4 +1,4 @@
-package app.revanced.cli.utils
+package app.revanced.cli.utils.patch
 
 import app.revanced.patches.Index
 

src/main/kotlin/app/revanced/cli/utils/signature/SignatureDownloader.kt

@@ -0,0 +1,22 @@
+package app.revanced.cli.utils.signature
+
+import java.io.File
+import java.net.URL
+import java.nio.file.Files
+import java.nio.file.Paths
+
+object SignatureDownloader {
+
+    fun download(out: String) {
+        val url =
+            URL("https://raw.githubusercontent.com/ReVancedTeam/revanced-signatures/main/signatures/youtube.signatures.json")
+
+        val file = File(out)
+
+        if(!file.exists()) {
+            url.openStream().use { Files.copy(it, Paths.get(out)) }
+        }
+
+    }
+
+}

src/main/kotlin/app/revanced/cli/utils/signature/SignatureParser.kt

@@ -1,6 +1,5 @@
-package app.revanced.cli.utils
+package app.revanced.cli.utils.signature
 
-import app.revanced.patcher.signature.MethodSignature
 import com.google.gson.JsonParser
 import me.tongfei.progressbar.ProgressBar
 import org.jf.dexlib2.AccessFlags