{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://cpobjects.mycpl.net/schema/message/file.json",
  "title": "File message",
  "description": "File message",
  "type": "object",
  "properties": {
    "name": {
      "description": "Name of the file",
      "type": "string"
    },
    "extension": {
      "description": "Extension of the file",
      "type": "string"
    },
    "type": {
      "description": "Type of the file",
      "type": "string",
      "enum": ["image", "video", "audio", "document"]
    },
    "base64": {
      "description": "Content of the file in base64",
      "type": "string"
    },
    "url": {
      "description": "URL of the file",
      "type": "string"
    }
  },
  "required": [],
  "anyOf": [
    { "required": ["base64"] },
    { "required": ["url"] }
  ]
}