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validate.py
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from jsonschema import validate, ValidationError
from fastapi import UploadFile
import yaml
# uv run .\validate.py
# Define max file size (10MB = 10 * 1024 * 1024 bytes)
MAX_FILE_SIZE = 10 * 1024 * 1024
# Define the schema for validation
schema = {
"type": "object",
"properties": {
"version": {"type": "number"},
"title": {"type": "string"},
"vendor_id": {"type": "string"},
"chapters": {
"type": "array",
"items": {
"type": "object",
"properties": {
"chapter_point": {
"type": "string",
"pattern": "^[0-9]{2}:[0-9]{2}:[0-9]{2}:[0-9]{2}$",
},
"stills": {
"type": "string",
"pattern": "^[0-9]{2}:[0-9]{2}:[0-9]{2}:[0-9]{2}$",
},
},
"required": ["chapter_point", "stills"],
},
},
"previews": {
"type": "array",
"items": {
"type": "object",
"properties": {
"episode": {"type": "integer"},
"id": {"type": "string"},
"duration_sec": {"type": "integer"},
"duration_hms": {
"type": "string",
"pattern": "^[0-9]{2}:[0-9]{2}:[0-9]{2}:[0-9]{2}$",
},
},
"required": ["episode", "id", "duration_sec", "duration_hms"],
},
},
"media_info": {
"type": "object",
"properties": {
"episode": {
"type": "array",
"items": {
"type": "object",
"properties": {
"episodes": {"type": "array", "items": {"type": "integer"}},
"spoken_audio": {"type": "string"},
"framerate": {"type": "string"},
"burnt_in_subtitles": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"burnt_in_narratives": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"full_subtitles": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"forced_subtitles": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
},
"required": [
"episodes",
"spoken_audio",
"framerate",
"burnt_in_subtitles",
"burnt_in_narratives",
"full_subtitles",
"forced_subtitles",
],
},
},
"feature": {
"type": "object",
"properties": {
"spoken_audio": {"type": "string"},
"frame_rate": {"type": "string"},
"burnt_in_subtitles": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"burnt_in_narratives": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"alternate_audio": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"full_subtitles": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"forced_subtitles": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
},
"required": [
"spoken_audio",
"frame_rate",
"burnt_in_subtitles",
"burnt_in_narratives",
"alternate_audio",
"full_subtitles",
"forced_subtitles",
],
},
"trailer": {
"type": "object",
"properties": {
"spoken_audio": {"type": "string"},
"frame_rate": {"type": "string"},
"burnt_in_subtitles": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"burnt_in_narratives": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"alternate_audio": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"full_subtitles": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
"forced_subtitles": {
"oneOf": [{"type": "boolean"}, {"type": "string"}]
},
},
"required": [
"spoken_audio",
"frame_rate",
"burnt_in_subtitles",
"burnt_in_narratives",
"alternate_audio",
"full_subtitles",
"forced_subtitles",
],
},
},
"minProperties": 1,
"maxProperties": 1,
"additionalProperties": False
},
"crop_info": {
"type": "object",
"properties": {
"episode": {
"oneOf": [
{ # List format
"type": "array",
"items": {
"type": "object",
"properties": {
"episodes": {
"type": "array",
"items": {"type": "integer"},
},
"crop_top": {"type": "integer"},
"crop_bottom": {"type": "integer"},
"crop_left": {"type": "integer"},
"crop_right": {"type": "integer"},
},
"required": [
"episodes",
"crop_top",
"crop_bottom",
"crop_left",
"crop_right",
],
},
},
{ # Single object format
"type": "object",
"properties": {
"crop_top": {"type": "integer"},
"crop_bottom": {"type": "integer"},
"crop_left": {"type": "integer"},
"crop_right": {"type": "integer"},
},
"required": [
"crop_top",
"crop_bottom",
"crop_left",
"crop_right",
],
},
]
},
"feature": {
"type": "object",
"properties": {
"crop_top": {"type": "integer"},
"crop_bottom": {"type": "integer"},
"crop_left": {"type": "integer"},
"crop_right": {"type": "integer"},
},
"required": ["crop_top", "crop_bottom", "crop_left", "crop_right"],
},
"trailer": {
"type": "object",
"properties": {
"crop_top": {"type": "integer"},
"crop_bottom": {"type": "integer"},
"crop_left": {"type": "integer"},
"crop_right": {"type": "integer"},
},
"required": ["crop_top", "crop_bottom", "crop_left", "crop_right"],
},
},
"minProperties": 1,
"maxProperties": 1,
"additionalProperties": False
},
},
"required": ["media_info", "crop_info"], # Only these two are mandatory
}
class DuplicateKeyError(Exception):
pass
class UniqueKeyLoader(yaml.SafeLoader):
def construct_mapping(self, node, deep=False):
mapping = {}
for key_node, value_node in node.value:
key = self.construct_object(key_node, deep=deep)
if key in mapping:
raise DuplicateKeyError(f"Duplicate key found: {key}")
mapping[key] = self.construct_object(value_node, deep=deep)
return mapping
async def validate_yaml_schema(file: UploadFile, schema=schema):
"""
Validates a YAML file from an UploadFile object.
Ensures the file is not larger than 10MB and has a valid YAML extension.
Returns the 'title' from the YAML and a validation message.
"""
title = "N/A"
# Check file extension
if not file.filename.lower().endswith((".yaml", ".yml")):
return title, "❌ Error: Not a valid YAML file (must be .yaml or .yml)."
# Read the file content
content = await file.read()
# Check file size
if len(content) > MAX_FILE_SIZE:
return title, "❌ Error: File exceeds the maximum file size of 10MB."
file.seek(0) # Reset file pointer for further processing
try:
# Parse YAML content
data = yaml.load(content, Loader=UniqueKeyLoader)
if data is None:
return title, "❌ Error: YAML file is empty or has invalid content."
# Extract title if available
title = data.get("title", "N/A")
except DuplicateKeyError as e:
return title, f"❌ YAML Duplicate Key Error: {e}"
except yaml.YAMLError as e:
return title, f"❌ YAML Syntax Error: {e}"
# Validate against the schema
try:
validate(instance=data, schema=schema)
return title, "✅ YAML file is valid and follows the schema."
except ValidationError as e:
return title, f"❌ Schema Validation Error: {e.message}"