mentorenwahl/docker/backend/src/backend/worker/jobs/send_teachers_registration_...

53 lines
1.7 KiB
Crystal

# Mentorenwahl: A fullstack application for assigning mentors to students based on their whishes.
# Copyright (C) 2022 Dominic Grimm
# 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 <https://www.gnu.org/licenses/>.
require "../../db/user"
module Backend
module Worker
module Jobs
# Sends all unregistered teachers a polite registration mail to ask if they may input their data
class SendTeachersRegistrationEmailJob < Mosquito::QueuedJob
# :ditto:
def perform : Nil
users = Db::User.where(role: Db::UserRole::Teacher.to_s, teacher_id: nil)
count = users.count.run.as(Int64).to_i
channel = Channel(Nil).new(count)
users.each do |user|
spawn do
unless Db::UserRole.parse(user.role).teacher?
fail
end
log "Sending teacher registration email to #{user.email} (#{user.id})"
Mailers::TeacherRegistrationMailer.new(user).deliver
channel.send(nil)
end
end
count.times do
channel.receive
end
Fiber.yield
end
end
end
end
end