// Commons
module.exports = Object.freeze({
  HEADERS: "headers",
  CHARSET_DEFAULT: "utf-8",

  SPEC_V03: "0.3",
  SPEC_V1: "1.0",

  DEFAULT_SPEC_VERSION_HEADER: "ce-specversion",

  ENCODING_BASE64: "base64",

  DATA_ATTRIBUTE: "data",

  MIME_JSON: "application/json",
  MIME_OCTET_STREAM: "application/octet-stream",
  MIME_CE: "application/cloudevents",
  MIME_CE_JSON: "application/cloudevents+json",

  HEADER_CONTENT_TYPE: "content-type",

  DEFAULT_CONTENT_TYPE: "application/json; charset=utf-8",
  DEFAULT_CE_CONTENT_TYPE: "application/cloudevents+json; charset=utf-8",

  BINARY_HEADERS_03: {
    TYPE: "ce-type",
    SPEC_VERSION: "ce-specversion",
    SOURCE: "ce-source",
    ID: "ce-id",
    TIME: "ce-time",
    SCHEMA_URL: "ce-schemaurl",
    CONTENT_ENCONDING: "ce-datacontentencoding",
    SUBJECT: "ce-subject",
    EXTENSIONS_PREFIX: "ce-"
  },
  STRUCTURED_ATTRS_03: {
    TYPE: "type",
    SPEC_VERSION: "specversion",
    SOURCE: "source",
    ID: "id",
    TIME: "time",
    SCHEMA_URL: "schemaurl",
    CONTENT_ENCONDING: "datacontentencoding",
    CONTENT_TYPE: "datacontenttype",
    SUBJECT: "subject",
    DATA: "data"
  },

  BINARY_HEADERS_1: {
    TYPE: "ce-type",
    SPEC_VERSION: "ce-specversion",
    SOURCE: "ce-source",
    ID: "ce-id",
    TIME: "ce-time",
    DATA_SCHEMA: "ce-dataschema",
    SUBJECT: "ce-subject",
    EXTENSIONS_PREFIX: "ce-"
  },
  STRUCTURED_ATTRS_1: {
    TYPE: "type",
    SPEC_VERSION: "specversion",
    SOURCE: "source",
    ID: "id",
    TIME: "time",
    DATA_SCHEMA: "dataschema",
    CONTENT_TYPE: "datacontenttype",
    SUBJECT: "subject",
    DATA: "data",
    DATA_BASE64: "data_base64"
  }
});