+ require "time"
+ require "rexml/parsers/sax2parser"
+ require "rexml/text"
+ require "xml/libxml"
+
+ # The base class for API Errors.
+ class APIError < RuntimeError
+ def initialize(message = "Generic API Error")
+ super
+ end
+
+ def status
+ :internal_server_error
+ end
+ end
+
+ # Raised when access is denied.
+ class APIAccessDenied < APIError
+ def initialize
+ super("Access denied")
+ end
+
+ def status
+ :forbidden
+ end
+ end
+
+ # Raised when an API object is not found.
+ class APINotFoundError < APIError
+ def initialize
+ super("Object not found")
+ end
+
+ def status
+ :not_found
+ end
+ end
+
+ # Raised when a precondition to an API action fails sanity check.
+ class APIPreconditionFailedError < APIError
+ def initialize(message = "")
+ super("Precondition failed: #{message}")
+ end
+
+ def status
+ :precondition_failed
+ end
+ end
+
+ # Raised when to delete an already-deleted object.
+ class APIAlreadyDeletedError < APIError
+ def initialize(object = "object", object_id = "")
+ @object = object
+ @object_id = object_id
+
+ super("The #{object} with the id #{object_id} has already been deleted")
+ end
+
+ attr_reader :object, :object_id
+
+ def status
+ :gone
+ end
+ end
+
+ # Raised when the user logged in isn't the same as the changeset
+ class APIUserChangesetMismatchError < APIError
+ def initialize
+ super("The user doesn't own that changeset")
+ end
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when the changeset provided is already closed
+ class APIChangesetAlreadyClosedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+
+ super("The changeset #{changeset.id} was closed at #{changeset.closed_at}")
+ end
+
+ attr_reader :changeset
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when the changeset provided is not yet closed
+ class APIChangesetNotYetClosedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+
+ super("The changeset #{changeset.id} is not yet closed.")
+ end
+
+ attr_reader :changeset
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when a user is already subscribed to the changeset
+ class APIChangesetAlreadySubscribedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+
+ super("You are already subscribed to changeset #{changeset.id}.")
+ end
+
+ attr_reader :changeset
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when a user is not subscribed to the changeset
+ class APIChangesetNotSubscribedError < APIError
+ def initialize(changeset)
+ @changeset = changeset
+
+ super("You are not subscribed to changeset #{changeset.id}.")
+ end
+
+ attr_reader :changeset
+
+ def status
+ :not_found
+ end
+ end
+
+ # Raised when a change is expecting a changeset, but the changeset doesn't exist
+ class APIChangesetMissingError < APIError
+ def initialize
+ super("You need to supply a changeset to be able to make a change")
+ end
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when a diff is uploaded containing many changeset IDs which don't match
+ # the changeset ID that the diff was uploaded to.
+ class APIChangesetMismatchError < APIError
+ def initialize(provided, allowed)
+ super("Changeset mismatch: Provided #{provided} but only #{allowed} is allowed")
+ end
+
+ def status
+ :conflict
+ end
+ end
+
+ # Raised when a diff upload has an unknown action. You can only have create,
+ # modify, or delete
+ class APIChangesetActionInvalid < APIError
+ def initialize(provided)
+ super("Unknown action #{provided}, choices are create, modify, delete")
+ end
+
+ def status
+ :bad_request
+ end
+ end
+
+ # Raised when bad XML is encountered which stops things parsing as
+ # they should.
+ class APIBadXMLError < APIError
+ def initialize(model, xml, message = "")
+ super("Cannot parse valid #{model} from xml string #{xml}. #{message}")
+ end
+
+ def status
+ :bad_request
+ end
+ end
+
+ # Raised when the provided version is not equal to the latest in the db.
+ class APIVersionMismatchError < APIError
+ def initialize(id, type, provided, latest)
+ @id = id
+ @type = type
+ @provided = provided
+ @latest = latest
+
+ super("Version mismatch: Provided #{provided}, server had: #{latest} of #{type} #{id}")
+ end
+
+ attr_reader :provided, :latest, :id, :type
+
+ def status
+ :conflict
+ end
+ end
+
+ # raised when a two tags have a duplicate key string in an element.
+ # this is now forbidden by the API.
+ class APIDuplicateTagsError < APIError
+ def initialize(type, id, tag_key)
+ @type = type
+ @id = id
+ @tag_key = tag_key
+
+ super("Element #{type}/#{id} has duplicate tags with key #{tag_key}")
+ end
+
+ attr_reader :type, :id, :tag_key
+
+ def status
+ :bad_request
+ end
+ end
+
+ # Raised when a way has more than the configured number of way nodes.
+ # This prevents ways from being to long and difficult to work with
+ class APITooManyWayNodesError < APIError
+ def initialize(id, provided, max)
+ super("You tried to add #{provided} nodes to way #{id}, however only #{max} are allowed")
+
+ @id = id
+ @provided = provided
+ @max = max
+ end
+
+ attr_reader :id, :provided, :max