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# frozen_string_literal: true
module BlobViewer
class Base
PARTIAL_PATH_PREFIX = 'projects/blob/viewers'.freeze
class_attribute :partial_name, :loading_partial_name, :type, :extensions, :file_types, :load_async, :binary, :switcher_icon, :switcher_title, :collapse_limit, :size_limit
self.loading_partial_name = 'loading'
delegate :partial_path, :loading_partial_path, :rich?, :simple?, :load_async?, :text?, :binary?, to: :class
attr_reader :blob
delegate :project, to: :blob
def initialize(blob)
@blob = blob
@initially_binary = blob.binary?
end
def self.partial_path
File.join(PARTIAL_PATH_PREFIX, partial_name)
end
def self.loading_partial_path
File.join(PARTIAL_PATH_PREFIX, loading_partial_name)
end
def self.rich?
type == :rich
end
def self.simple?
type == :simple
end
def self.auxiliary?
type == :auxiliary
end
def self.load_async?
load_async
end
def self.binary?
binary
end
def self.text?
!binary?
end
def self.can_render?(blob, verify_binary: true)
return false if verify_binary && binary? != blob.binary?
return true if extensions&.include?(blob.extension)
return true if file_types&.include?(blob.file_type)
false
end
def collapsed?
return @collapsed if defined?(@collapsed)
@collapsed = !blob.expanded? && collapse_limit && blob.raw_size > collapse_limit
end
def too_large?
return @too_large if defined?(@too_large)
@too_large = size_limit && blob.raw_size > size_limit
end
def binary_detected_after_load?
!@initially_binary && blob.binary?
end
# This method is used on the server side to check whether we can attempt to
# render the blob at all. Human-readable error messages are found in the
# `BlobHelper#blob_render_error_reason` helper.
#
# This method does not and should not load the entire blob contents into
# memory, and should not be overridden to do so in order to validate the
# format of the blob.
#
# Prefer to implement a client-side viewer, where the JS component loads the
# binary from `blob_raw_path` and does its own format validation and error
# rendering, especially for potentially large binary formats.
def render_error
if too_large?
:too_large
elsif collapsed?
:collapsed
end
end
def prepare!
# To be overridden by subclasses
end
end
end
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