{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/wget/main/json-schema/wget2-plugin-schema.json",
  "title": "Wget2 Plugin",
  "description": "Schema representing the Wget2 plugin API structure, including plugin registration, URL filter callbacks, and post-download processor callbacks via libwget.",
  "type": "object",
  "properties": {
    "pluginName": {
      "type": "string",
      "description": "The registered name of the Wget2 plugin as returned by wget_plugin_get_name()."
    },
    "initializerFunction": {
      "type": "string",
      "description": "Name of the required entry point: wget_plugin_initializer(). Called when the plugin is loaded.",
      "const": "wget_plugin_initializer"
    },
    "callbacks": {
      "type": "object",
      "description": "Callbacks registered by the plugin.",
      "properties": {
        "finalizer": {
          "type": "object",
          "description": "Callback invoked when wget exits.",
          "properties": {
            "function": {
              "type": "string",
              "description": "Function name registered via wget_plugin_register_finalizer()."
            },
            "receivesExitStatus": {
              "type": "boolean",
              "description": "The finalizer receives the exit status of wget."
            }
          }
        },
        "optionHandler": {
          "type": "object",
          "description": "Callback for handling plugin-specific command-line options.",
          "properties": {
            "function": {
              "type": "string",
              "description": "Function name registered via wget_plugin_register_option_callback()."
            },
            "optionPattern": {
              "type": "string",
              "description": "CLI option pattern: --plugin-opt=<plugin-name>.<option>[=<value>]"
            }
          }
        },
        "urlFilter": {
          "type": "object",
          "description": "Callback for intercepting and filtering URLs before download.",
          "properties": {
            "function": {
              "type": "string",
              "description": "Function name registered via wget_plugin_register_url_filter_callback()."
            },
            "actions": {
              "type": "array",
              "items": {
                "type": "string",
                "enum": ["reject", "accept", "set_alt_url", "set_local_filename"]
              },
              "description": "Possible intercept actions the filter can take."
            }
          }
        },
        "postProcessor": {
          "type": "object",
          "description": "Callback for processing files after they have been downloaded.",
          "properties": {
            "function": {
              "type": "string",
              "description": "Function name registered via wget_plugin_register_post_processor()."
            },
            "fileAccess": {
              "type": "array",
              "items": {
                "type": "string",
                "enum": [
                  "get_source_url",
                  "get_local_filename",
                  "get_size",
                  "get_contents",
                  "open_stream",
                  "get_recurse",
                  "add_recurse_url"
                ]
              },
              "description": "Available file access methods in the post-processor callback."
            }
          }
        }
      }
    },
    "downloadedFile": {
      "type": "object",
      "description": "Structure representing a file that has been downloaded by Wget2.",
      "properties": {
        "sourceUrl": {
          "type": "string",
          "format": "uri",
          "description": "The origin URL of the downloaded file."
        },
        "localFilename": {
          "type": "string",
          "description": "The local file system path where the file was saved."
        },
        "size": {
          "type": "integer",
          "format": "int64",
          "minimum": 0,
          "description": "Size of the downloaded file in bytes."
        },
        "recurse": {
          "type": "boolean",
          "description": "Whether URL scanning (recursive link extraction) should be performed on this file."
        },
        "recurseUrls": {
          "type": "array",
          "items": {
            "type": "string",
            "format": "uri"
          },
          "description": "URLs discovered during post-processing and queued for recursive download."
        }
      }
    }
  },
  "required": ["pluginName", "initializerFunction"]
}