/
extractor.cr
66 lines (56 loc) · 1.92 KB
/
extractor.cr
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#
# extractor.cr - Crystal bindings for libextractor
#
# Copyright (c) 2020 - Hal Brodigan (postmodern.mod3 at gmail.com)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
require "./libextractor"
require "./extractor/plugin_list"
require "./extractor/metadata_processor"
module Extractor
VERSION = "0.1.0"
alias Options = LibExtractor::Options
alias MetaType = LibExtractor::MetaType
alias MetaFormat = LibExtractor::MetaFormat
alias MetaData = MetadataProcessor::MetaData
@@plugins : PluginList? = nil
#
# The default list of plugins.
#
def self.plugins : PluginList
@@plugins ||= PluginList.default
end
#
# Aborts metadata extraction.
#
@[Raises(MetadataProcessor::Abort)]
def self.abort!
raise(MetadataProcessor::Abort.new)
end
#
# Extracts metadata from the given String.
#
def self.extract(data : String, plugins = Extractor.plugins, &block : MetadataProcessor::Callback)
processor = MetadataProcessor.new(&block)
LibExtractor.EXTRACTOR_extract(plugins,nil,data,data.size,processor,processor.callback)
end
#
# Extracts metadata from a file.
#
def self.extract_from(path : String | Path, plugins = Extractor.plugins, &block : MetadataProcessor::Callback)
processor = MetadataProcessor.new(&block)
LibExtractor.EXTRACTOR_extract(plugins,path,nil,0,processor,processor.callback)
end
end