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# frozen_string_literal: true
module Gitlab
module GithubGistsImport
module Importer
class GistImporter
attr_reader :gist, :user, :snippet
FileCountLimitError = Class.new(StandardError)
RepoSizeLimitError = Class.new(StandardError)
SnippetRepositoryError = Class.new(StandardError)
FILE_COUNT_LIMIT_MESSAGE = 'Snippet maximum file count exceeded'
REPO_SIZE_LIMIT_MESSAGE = 'Snippet repository size exceeded'
# gist - An instance of `Gitlab::GithubGistsImport::Representation::Gist`.
def initialize(gist, user_id)
@gist = gist
@user = User.find(user_id)
end
def execute
validate_gist!
@snippet = build_snippet
import_repository if snippet.save!
validate_repository!
ServiceResponse.success
rescue FileCountLimitError, RepoSizeLimitError, SnippetRepositoryError => exception
fail_and_track(snippet, exception)
end
private
def build_snippet
attrs = {
title: gist.truncated_title,
visibility_level: gist.visibility_level,
content: gist.first_file[:file_content],
file_name: gist.first_file[:file_name],
author: user,
created_at: gist.created_at,
updated_at: gist.updated_at
}
PersonalSnippet.new(attrs)
end
def import_repository
resolved_address = get_resolved_address
snippet.create_repository
snippet.repository.fetch_as_mirror(gist.git_pull_url, forced: true, resolved_address: resolved_address)
rescue StandardError
remove_snippet_and_repository
raise
end
def get_resolved_address
validated_pull_url, host = Gitlab::UrlBlocker.validate!(gist.git_pull_url,
schemes: Project::VALID_IMPORT_PROTOCOLS,
ports: Project::VALID_IMPORT_PORTS,
allow_localhost: allow_local_requests?,
allow_local_network: allow_local_requests?)
host.present? ? validated_pull_url.host.to_s : ''
end
def check_gist_files_count!
return if gist.files.count <= Snippet.max_file_limit
raise FileCountLimitError, FILE_COUNT_LIMIT_MESSAGE
end
def check_gist_repo_size!
return if gist.total_files_size <= Gitlab::CurrentSettings.snippet_size_limit
raise RepoSizeLimitError, REPO_SIZE_LIMIT_MESSAGE
end
def remove_snippet_and_repository
snippet.repository.remove if snippet.repository_exists?
snippet.destroy
end
def allow_local_requests?
Gitlab::CurrentSettings.allow_local_requests_from_web_hooks_and_services?
end
def fail_and_track(snippet, exception)
remove_snippet_and_repository if snippet
ServiceResponse.error(message: exception.message).track_exception(as: exception.class)
end
def validate_gist!
check_gist_files_count!
check_gist_repo_size!
end
def validate_repository!
result = Snippets::RepositoryValidationService.new(user, snippet).execute
raise SnippetRepositoryError, result.message if result.error?
end
end
end
end
end
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