lib/lazylead/cli/app.rb
# frozen_string_literal: true

# The MIT License
#
# Copyright (c) 2019-2022 Yurii Dubinka
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom
# the Software is  furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
# OR OTHER DEALINGS IN THE SOFTWARE.

require "colorize"
require "vcs4sql/sqlite/migration"
require_relative "../smtp"
require_relative "../schedule"

module Lazylead
  # @todo #/DEV Lazylead::CLI::Args add a new class which extends hash
  #  in order to access command-line arguments in easy manner.
  module CLI
    #
    # APP start command.
    #
    # By default, the app will check the version of the database structure and
    #  apply the missing change sets (more https://github.com/dgroup/vcs4sql).
    #
    # Author:: Yurii Dubinka (yurii.dubinka@gmail.com)
    # Copyright:: Copyright (c) 2019-2020 Yurii Dubinka
    # License:: MIT
    class App
      def initialize(log, schedule, smtp = Smtp.new)
        @log = log
        @schedule = schedule
        @smtp = smtp
      end

      def run(opts)
        apply_vcs_migration opts
        enable_active_record opts
        @smtp.enable
        schedule_tasks
      end

      private

      def apply_vcs_migration(opts)
        @db = "#{File.expand_path(opts[:home])}/#{opts[:sqlite]}"
        vcs = "#{File.expand_path(opts[:home])}/#{opts[:vcs4sql]}"
        @log.debug "Database: '#{@db.colorize(:light_blue)}', " \
                   "sql migration dir: '#{vcs.colorize(:light_blue)}'"
        Vcs4sql::Sqlite::Migration.new(@db).upgrade vcs, opts[:testdata]
        @log.debug "Migration applied to '#{@db.colorize(:light_blue)}' from " \
                   "'#{vcs.colorize(:light_blue)}'"
      end

      def enable_active_record(opts)
        ActiveRecord::Base.establish_connection(
          adapter: "sqlite3",
          database: @db,
          pool: opts[:max_connections] || ENV.fetch("MT_CPU", nil)
        )
        @log.debug "Database connection established"
      end

      def schedule_tasks
        todo = ORM::Task.where(enabled: "true")
        if todo.empty?
          @log.warn "ll-001: No tasks found."
        else
          todo.find_each do |task|
            if task.to_h?
              @schedule.register task
            else
              @log.warn "ll-011: Scheduling skipped due to configuration " \
                        "mistake in #{task}"
            end
          end
          @schedule.join
        end
      end
    end
  end
end
