78 lines
2.2 KiB
Ruby
78 lines
2.2 KiB
Ruby
#
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# Copyright (C) 2011 - present Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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require 'rubygems'
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require 'zip'
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require 'fileutils'
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# Call this with a block. The block will take an array of filenames
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# extracted. Once this block is executed, these extracted files and
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# their directory are destroyed. An example:
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# ZipExtractor.call(@zip_filename) {|list|
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# list.each {|f| FileInContext.attach(@context, f)}
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# }
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# That example takes all the files in a zipped directory and attaches
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# them to a context.
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class ZipExtractor
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class << self
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def call(filename, &block)
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ze = new(filename)
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ze.unzip_files(&block)
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end
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end
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attr_reader :filename, :unzipped_files
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def initialize(filename)
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@filename = filename
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end
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# Grabs all files and dumps them into a temporary directory.
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def unzip_files(&block)
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@unzipped_files = []
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CanvasUnzip.extract_archive(@filename) do |zip_entry|
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next if zip_entry.directory?
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local_name = File.join(dirname, File.split(zip_entry.name).last)
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zip_entry.extract(local_name)
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self.unzipped_files << local_name
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end
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block.call(self.unzipped_files) if block
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return self.unzipped_files
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end
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def remove_extracted_files!
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FileUtils.rm_rf(dirname)
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end
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def make_safe_haven
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return @dirname if @dirname
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@dirname = safe_haven_name
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FileUtils.mkdir(@dirname)
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@dirname
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end
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alias :dirname :make_safe_haven
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def safe_haven_name
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dirname = "/tmp/#{CanvasSlug.generate}"
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while File.exist?(dirname)
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dirname = "/tmp/#{CanvasSlug.generate}"
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end
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dirname
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end
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end
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