{
  "$schema": "http://json-schema.org/draft-07/schema",
  "$id": "https://smart-data-models.github.io/dataModel.GBFS/system_alerts/schema.json",
  "description": "Describes ad-hoc changes to the system. According to the Standard GBFS 2.2",
  "modelTags": "GBFS",
  "derivedFrom": "https://github.com/NABSA/gbfs/blob/v2.2/gbfs.md",
  "type": "object",
  "$schemaVersion": "0.0.1",
  "title": "Smart Data Models adaptation of GBFS standard data model system_alerts",
  "properties": {
    "id": {
      "$ref": "https://github.com/smart-data-models/data-models/raw/master/common-schema.json#/definitions/EntityIdentifierType"
    },
    "type": {
      "type": "string",
      "description": "Property. NGSI entity type. It has to be system_alerts",
      "enum": [
        "system_alerts"
      ]
    },
    "last_updated": {
      "description": "Property. Last time the data in the feed was updated in POSIX time.",
      "type": "integer",
      "minimum": 1450155600
    },
    "ttl": {
      "description": "Property. Number of seconds before the data in the feed will be updated again (0 if the data should always be refreshed).",
      "type": "integer",
      "minimum": 0
    },
    "version": {
      "description": "Property. GBFS version number to which the feed conforms, according to the versioning framework (added in v1.1).",
      "type": "string",
      "enum": [
        "1.1-RC",
        "1.1",
        "2.0-RC",
        "2.0",
        "2.1-RC",
        "2.1-RC2",
        "2.1",
        "2.2",
        "3.0-RC",
        "3.0"
      ]
    },
    "data": {
      "description": "Property. Array that contains ad-hoc alerts for the system.",
      "type": "object",
      "properties": {
        "alerts": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "alert_id": {
                "description": "Identifier for this alert.",
                "type": "string"
              },
              "type": {
                "description": "Type of alert.",
                "type": "string",
                "enum": [
                  "system_closure",
                  "station_closure",
                  "station_move",
                  "other"
                ]
              },
              "times": {
                "description": "Array of objects indicating when the alert is in effect.",
                "type": "array",
                "items": {
                  "type": "object",
                  "properties": {
                    "start": {
                      "description": "Start time of the alert.",
                      "type": "number",
                      "minimum": 1450155600
                    },
                    "end": {
                      "description": "End time of the alert.",
                      "type": "number",
                      "minimum": 1450155600
                    }
                  }
                },
                "additionalItems": false,
                "required": [
                  "start"
                ]
              },
              "station_ids": {
                "description": "Array of identifiers of the stations for which this alert applies.",
                "type": "array",
                "items": {
                  "type": "string"
                }
              },
              "region_ids": {
                "description": "Array of identifiers of the regions for which this alert applies.",
                "type": "array",
                "items": {
                  "type": "string"
                }
              },
              "url": {
                "description": "URL where the customer can learn more information about this alert.",
                "type": "string",
                "format": "uri"
              },
              "summary": {
                "description": "A short summary of this alert to be displayed to the customer.",
                "type": "string"
              },
              "description": {
                "description": "Detailed description of the alert.",
                "type": "string"
              },
              "last_updated": {
                "description": "Indicates the last time the info for the alert was updated.",
                "type": "number",
                "minimum": 1450155600
              }
            },
            "required": [
              "alert_id",
              "type",
              "summary"
            ]
          }
        }
      },
      "required": [
        "alerts"
      ]
    }
  },
  "required": [
    "last_updated",
    "ttl",
    "version",
    "data",
    "id",
    "type"
  ]
}