Changes to patch.py (#65)

* Changes to patch.py
* Get hos/port from host.yaml if applicable.
* Extract rom/host information from existing patch files.
* Give users a chance to read the info as required.

* Update patches in zip file with new host.
(Kind of wish I didn't have to create  a new zip file to do this, but unfortunately there is no options in zipfile to overwrite/delete existing files.)

Patch.py

@@ -3,6 +3,9 @@ import yaml
 import os
 import lzma
 import hashlib
+import threading
+import concurrent.futures
+import zipfile
 from typing import Tuple, Optional
 
 import Utils
@@ -56,6 +59,13 @@ def create_rom_file(patch_file) -> Tuple[dict, str]:
     return data["meta"], target
 
 
+def update_patch_data(patch_data: bytes, server: str = "") -> bytes:
+    data = Utils.parse_yaml(lzma.decompress(patch_data).decode("utf-8-sig"))
+    data["meta"]["server"] = server
+    bytes = generate_patch(data["patch"], data["meta"])
+    return lzma.compress(bytes)
+
+
 def load_bytes(path: str):
     with open(path, "rb") as f:
         return f.read()
@@ -66,11 +76,58 @@ def write_lzma(data: bytes, path: str):
         f.write(data)
 
 if __name__ == "__main__":
-    ipv4 = Utils.get_public_ipv4()
+    host = Utils.get_public_ipv4()
+    try:
+        options = Utils.get_options()['server_options']
+        if options['host']:
+            ipv4 = options['host'] + ":" + str(options['port'])
+        else:
+            ipv4 = host + ":" + options['port']
+    except:
+        ipv4 = host + ":38281"
+
+    ziplock = threading.Lock()
+
+    print(f"Host for patches to be created is {ipv4}")
     import sys
 
+    Processed = False
     for rom in sys.argv:
-        if rom.endswith(".sfc"):
-            print(f"Creating patch for {rom}")
-            result = create_patch_file(rom, ipv4)
-            print(f"Created patch {result}")
+        Processed |= rom.endswith(".sfc") or rom.endswith(".bmbp") or rom.endswith(".zip")
+        try:
+            if rom.endswith(".sfc"):
+                print(f"Creating patch for {rom}")
+                result = create_patch_file(rom, ipv4)
+                print(f"Created patch {result}")
+            elif rom.endswith(".bmbp"):
+                print(f"Applying patch {rom}")
+                data, target = create_rom_file(rom)
+                print(f"Created rom {target}.")
+                if 'server' in data:
+                    print(f"Host is {data['server']}")
+            elif rom.endswith(".zip"):
+                print(f"Updating host in patch files contained in {rom}")
+                def _handle_zip_file_entry(zfinfo : zipfile.ZipInfo, server: str):
+                    data = zfr.read(zfinfo)
+                    if zfinfo.filename.endswith(".bmbp"):
+                        data = update_patch_data(data, server)
+                    with ziplock:
+                        zfw.writestr(zfinfo, data)
+                    return zfinfo.filename
+
+                with concurrent.futures.ThreadPoolExecutor() as pool:
+                    futures = []
+                    with zipfile.ZipFile(rom, "r") as zfr:
+                        updated_zip = os.path.splitext(rom)[0] + "_updated.zip"
+                        with zipfile.ZipFile(updated_zip, "w", compression=zipfile.ZIP_DEFLATED, compresslevel=9) as zfw:
+                            for zfname in zfr.namelist():
+                                futures.append(pool.submit(_handle_zip_file_entry, zfr.getinfo(zfname), ipv4))
+                            for future in futures:
+                                print(f"File {future.result()} added to {os.path.split(updated_zip)[1]}")
+
+        except:
+            import traceback
+            traceback.print_exc()
+
+    if Processed:
+        input("Press enter to close.")