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