canvas-lms/lib/support_helpers/fixer.rb

86 lines
2.2 KiB
Ruby

#
# Copyright (C) 2016 - present Instructure, Inc.
#
# This file is part of Canvas.
#
# Canvas is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, version 3 of the License.
#
# Canvas 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 Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
module SupportHelpers
class Fixer
attr_reader :job_id
def initialize(email, after_time = nil)
@email = email
@start_time = 0
@after_time = after_time || 2.months.ago
@job_id = Time.now.to_i + Random.rand(1000) # just need something unique
@prefix ||= nil
end
def monitor_and_fix
@start_time = Time.now
fix # actually do it
notify "Success", success_message
rescue => error
notify "Error", error_message(error)
raise error
end
def fix
raise "#{self.class.name} must implement #fix"
end
def fixer_name
[@prefix, self.class.name.demodulize, "##{job_id}"].compact.join(' ')
end
private
def elapsed_time
return 0 unless @start_time
(Time.now - @start_time).to_i
end
def success_message
"#{fixer_name} done in #{elapsed_time} seconds!"
end
def error_message(error)
message = error.try(:message)
backtrace = error.try(:backtrace).try(:join, "<br/>")
"#{fixer_name} failed because #{message}<br/><br/>#{backtrace}"
end
def notify(status, message)
m = Message.new(
to: @email,
from: mail_from,
subject: mail_subject(status),
body: message,
delay_for: 0
)
Mailer.create_message(m).deliver_now rescue nil # omg! just ignore delivery failures
end
def mail_from
'supporthelperscript@instructure.com'
end
def mail_subject(status)
"#{@prefix}Fixer #{status}"
end
end
end