GDS: FileManager skeleton added.

Apps/GroundSoftware/IrisBackendv3/codec/files/file.py

@@ -0,0 +1,27 @@
+from typing import TypeAlias, Dict, List, Final, ClassVar
+
+from dataclasses import dataclass
+
+from ..payload import FileMetadata, FileBlockPayload
+
+HashedId: TypeAlias = int
+
+class File:
+    _FILE_EXT: ClassVar[str] = '.iris.hex'
+
+    _metadata: FileMetadata
+
+    _blocks: Dict[int, FileBlockPayload]
+
+    @property
+    def hashedId(self) -> HashedId:
+        return self._metadata.hashedId
+
+    def ingest_block(block: FileBlockPayload) -> None:
+        pass
+
+    def generate_file_contents() -> bytes:
+        # TODO: Make a cached property?
+        pass
+
+    def save_file(self, path: str)

Apps/GroundSoftware/IrisBackendv3/codec/files/file_manager.py

@@ -0,0 +1,15 @@
+from typing import TypeAlias, Dict, List
+
+from .file import File, HashedId
+from ..packet import Packet
+
+class FileManager:
+    in_progress_files: Dict[HashedId, File]
+
+    def process_packet(packet: Packet) -> bool:
+        """ Extracts any file blocks from the given packet and uses them to
+        build or continue building a file.
+        """
+        raise NotImplementedError()
+
+    def save_all_files()

Apps/GroundSoftware/IrisBackendv3/codec/files/image.py

@@ -0,0 +1,7 @@
+from .file import File
+
+class Image(File):
+    # override save
+
+    def to_b64(self) -> str:
+        pass