{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "http://asyncapi.com/bindings/sns/0.2.0/channel.json",
  "title": "Channel Schema",
  "description": "This object contains information about the channel representation in SNS.",
  "type": "object",
  "additionalProperties": false,
  "patternProperties": {
    "^x-[\\w\\d\\.\\x2d_]+$": {
      "$ref": "http://asyncapi.com/definitions/3.0.0/specificationExtension.json"
    }
  },
  "properties": {
    "name": {
      "type": "string",
      "description": "The name of the topic. Can be different from the channel name to allow flexibility around AWS resource naming limitations."
    },
    "ordering": {
      "$ref": "http://asyncapi.com/bindings/sns/0.2.0/channel.json#/definitions/ordering"
    },
    "policy": {
      "$ref": "http://asyncapi.com/bindings/sns/0.2.0/channel.json#/definitions/policy"
    },
    "tags": {
      "type": "object",
      "description": "Key-value pairs that represent AWS tags on the topic."
    },
    "bindingVersion": {
      "type": "string",
      "description": "The version of this binding.",
      "default": "latest"
    }
  },
  "required": [
    "name"
  ],
  "definitions": {
    "ordering": {
      "type": "object",
      "description": "By default, we assume an unordered SNS topic. This field allows configuration of a FIFO SNS Topic.",
      "patternProperties": {
        "^x-[\\w\\d\\.\\x2d_]+$": {
          "$ref": "http://asyncapi.com/definitions/3.0.0/specificationExtension.json"
        }
      },
      "properties": {
        "type": {
          "type": "string",
          "description": "Defines the type of SNS Topic.",
          "enum": [
            "standard",
            "FIFO"
          ]
        },
        "contentBasedDeduplication": {
          "type": "boolean",
          "description": "True to turn on de-duplication of messages for a channel."
        }
      },
      "required": [
        "type"
      ]
    },
    "policy": {
      "type": "object",
      "description": "The security policy for the SNS Topic.",
      "patternProperties": {
        "^x-[\\w\\d\\.\\x2d_]+$": {
          "$ref": "http://asyncapi.com/definitions/3.0.0/specificationExtension.json"
        }
      },
      "properties": {
        "statements": {
          "type": "array",
          "description": "An array of statement objects, each of which controls a permission for this topic",
          "items": {
            "$ref": "http://asyncapi.com/bindings/sns/0.2.0/channel.json#/definitions/statement"
          }
        }
      },
      "required": [
        "statements"
      ]
    },
    "statement": {
      "type": "object",
      "patternProperties": {
        "^x-[\\w\\d\\.\\x2d_]+$": {
          "$ref": "http://asyncapi.com/definitions/3.0.0/specificationExtension.json"
        }
      },
      "properties": {
        "effect": {
          "type": "string",
          "enum": [
            "Allow",
            "Deny"
          ]
        },
        "principal": {
          "description": "The AWS account(s) or resource ARN(s) that this statement applies to.",
          "oneOf": [
            {
              "type": "string"
            },
            {
              "type": "object",
              "properties": {
                "AWS": {
                  "oneOf": [
                    {
                      "type": "string"
                    },
                    {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    }
                  ]
                }
              },
              "required": [
                "AWS"
              ],
              "additionalProperties": false
            },
            {
              "type": "object",
              "properties": {
                "Service": {
                  "oneOf": [
                    {
                      "type": "string"
                    },
                    {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    }
                  ]
                }
              },
              "required": [
                "Service"
              ],
              "additionalProperties": false
            }
          ]
        },
        "action": {
          "description": "The SNS permission(s) being allowed or denied e.g. sns:Publish",
          "oneOf": [
            {
              "type": "string"
            },
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            }
          ]
        },
        "resource": {
          "description": "The resource(s) that this policy applies to.",
          "oneOf": [
            {
              "type": "string"
            },
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            }
          ]
        },
        "condition": {
          "description": "Specific circumstances under which the policy grants permission",
          "type": "object",
          "patternProperties": {
            ".*": {  
              "type": "object",
              "patternProperties": {
                ".*": {
                  "oneOf": [
                    {
                      "type": "string"
                    },
                    {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    }
                  ]
                }
              }
            }
          }        
        }
      },
      "required": [
        "effect",
        "principal",
        "action"
      ]
    }
  },
  "examples": [
    {
      "name": "my-sns-topic",
      "policy": {
        "statements": [
          {
            "effect": "Allow",
            "principal": "*",
            "action": "SNS:Publish"
          }
        ]
      }
    }
  ]
}