{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://softbox.invalid/schemas/download-task.schema.json",
  "title": "SoftBox download-task.json v1",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schema_version",
    "request_id",
    "app_id",
    "url",
    "status",
    "attempt",
    "done",
    "total_known",
    "total",
    "validator",
    "error_code",
    "created_at"
  ],
  "properties": {
    "schema_version": {
      "const": 1
    },
    "request_id": {
      "type": "string",
      "maxLength": 128,
      "pattern": "^[a-z0-9][a-z0-9-]{0,127}$"
    },
    "app_id": {
      "type": "string",
      "maxLength": 128,
      "pattern": "^[a-z0-9][a-z0-9-]{0,127}$"
    },
    "url": {
      "type": "string",
      "maxLength": 4096,
      "format": "uri",
      "pattern": "^https://"
    },
    "status": {
      "enum": ["queued", "downloading", "paused", "failed", "completed"]
    },
    "attempt": {
      "type": "integer",
      "minimum": 0
    },
    "done": {
      "type": "integer",
      "minimum": 0
    },
    "total_known": {
      "type": "boolean"
    },
    "total": {
      "type": "integer",
      "minimum": 0
    },
    "validator": {
      "oneOf": [
        {
          "type": "object",
          "additionalProperties": false,
          "maxProperties": 0
        },
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["etag"],
          "properties": {
            "etag": {
              "type": "string",
              "maxLength": 512,
              "pattern": "^\".*\"$"
            }
          }
        },
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["last_modified"],
          "properties": {
            "last_modified": {
              "type": "string",
              "maxLength": 512
            }
          }
        }
      ]
    },
    "error_code": {
      "type": "string",
      "maxLength": 64,
      "pattern": "^$|^[a-z0-9][a-z0-9_]{0,63}$"
    },
    "created_at": {
      "type": "string",
      "format": "date-time"
    }
  },
  "allOf": [
    {
      "if": {
        "properties": {
          "total_known": {
            "const": false
          }
        },
        "required": ["total_known"]
      },
      "then": {
        "properties": {
          "total": {
            "const": 0
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "status": {
            "const": "failed"
          }
        },
        "required": ["status"]
      },
      "then": {
        "properties": {
          "error_code": {
            "minLength": 1
          }
        }
      },
      "else": {
        "properties": {
          "error_code": {
            "const": ""
          }
        }
      }
    }
  ]
}