add mock generation script

generate.py

@@ -0,0 +1,56 @@
+import subprocess
+import urllib.request
+import typing
+import json
+import tempfile
+import os
+
+default_context = json.loads('''
+{
+    "context":{
+        "client":{
+            "hl":"en",
+            "gl":"US",
+            "deviceMake":"",
+            "deviceModel":"",
+            "clientName":"WEB",
+            "clientVersion":"2.20230217.01.00"
+        }
+    }
+}
+''')
+
+# URL of the script
+url = "https://github.com/iv-org/youtube-utils/raw/master/scripts/yt-api-helper.sh"
+
+temp_dir = tempfile.TemporaryDirectory()
+script_path = os.path.join(temp_dir.name, "yt-api-helper.sh")
+urllib.request.urlretrieve(url, script_path)
+os.chmod(script_path, 0o755)
+
+def run_yt_helper_script(*args: [str]) -> str:
+        output = subprocess.run([script_path, *args], check=True, stdout=subprocess.PIPE)
+        return output.stdout.decode()
+
+def read_videos_metadata() -> typing.List[dict]:
+    with open("./video/_videos.json", "r") as file:
+        file_contents = file.read()
+        data = json.loads(file_contents)
+        return data["files"]
+
+
+def write_string_to_file(filename: str, string: str):
+    with open(filename, 'w') as file:
+        file.write(string)
+
+
+files = read_videos_metadata()
+for file in files:
+    default_context.update({"videoId": file["video_id"]})
+    context = json.dumps(default_context)
+    video = json.loads(run_yt_helper_script("-c", "web", "-e", file['endpoint'], "--data", context))
+    del video['responseContext']
+    write_string_to_file("video/"+file["name"], json.dumps(video, indent=2))
+    
+
+