python service http refactor start

audio-service/src/metadata_manager.py

@@ -0,0 +1,48 @@
+import os
+import json
+
+class MetaDataManager:
+    _instance = None
+
+    def __new__(cls, *args, **kwargs):
+        if cls._instance is None:
+            cls._instance = super().__new__(cls)
+        return cls._instance
+    def __init__(self):
+        # read metadata file from executing directory
+        self.metadata_file = os.path.join(os.getcwd(), "metadata.json")
+        if os.path.exists(self.metadata_file):
+            with open(self.metadata_file, "r") as f:
+                self.collections = json.load(f)
+        else:
+            self.collections = {}
+    
+    def create_collection(self, name):
+        if name in self.collections:
+            raise ValueError(f"Collection '{name}' already exists.")
+        self.collections[name] = []
+        self.save_metadata()
+    
+    def delete_collection(self, name):
+        if name not in self.collections:
+            raise ValueError(f"Collection '{name}' does not exist.")
+        del self.collections[name]
+        self.save_metadata()
+    
+    def add_clip_to_collection(self, collection_name, clip_metadata):
+        if collection_name not in self.collections:
+            raise ValueError(f"Collection '{collection_name}' does not exist.")
+        self.collections[collection_name].append(clip_metadata)
+        self.save_metadata()
+    
+    def get_collections(self):
+        return list(self.collections.keys())
+    
+    def get_clips_in_collection(self, collection_name):
+        if collection_name not in self.collections:
+            raise ValueError(f"Collection '{collection_name}' does not exist.")
+        return self.collections[collection_name]
+    
+    def save_metadata(self):
+        with open(self.metadata_file, "w") as f:
+            json.dump(self.collections, f, indent=4)