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# frozen_string_literal: true
module Projects
class LsifDataService
attr_reader :file, :project, :path, :commit_id
CACHE_EXPIRE_IN = 1.hour
def initialize(file, project, params)
@file = file
@project = project
@path = params[:path]
@commit_id = params[:commit_id]
end
def execute
docs, doc_ranges, ranges =
fetch_data.values_at('docs', 'doc_ranges', 'ranges')
doc_id = doc_id_from(docs)
doc_ranges[doc_id]&.map do |range_id|
line_data, column_data = ranges[range_id]['loc']
{
start_line: line_data.first,
end_line: line_data.last,
start_char: column_data.first,
end_char: column_data.last
}
end
end
private
def fetch_data
Rails.cache.fetch("project:#{project.id}:lsif:#{commit_id}", expires_in: CACHE_EXPIRE_IN) do
data = nil
file.open do |stream|
Zlib::GzipReader.wrap(stream) do |gz_stream|
data = JSON.parse(gz_stream.read)
end
end
data
end
end
def doc_id_from(docs)
docs.reduce(nil) do |doc_id, (id, doc_path)|
next doc_id unless doc_path =~ /#{path}$/
if doc_id.nil? || docs[doc_id].size > doc_path.size
doc_id = id
end
doc_id
end
end
end
end
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