util.rb

#!/usr/bin/env ruby
# Part of utility to convert HTMLed-XLS studienpläne into iCals.
# Copyright (C) 2016 Christoph criztovyl Schulz
#
# 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 <http://www.gnu.org/licenses/>.


# This is a util module.
module StudienplanUtil

    # Formats a time string
    def formatTime(dateTime)
        # i.e Thu 12:30 15.03.2016 KW11
        dateTime.strftime("%a %H:%M %d.%m.%y KW%U")
    end

    # Formats as a day string
    def formatDay(date)
        date.strftime("%a %d.%m.%y")
    end

    # Formats as a from-to string
    def formatWeek(date)
        date = date - date.cwday + 1 # Monday
        date_ = date + 4 # Friday
        formatTime(date) + " - " + formatDay(date_)
    end

    def format_non_empty(obj, format="%s", empty="", opts=[])
        if obj.class.name == String.name
            if obj.empty?
                ""
            else
                format % obj
            end
        elsif obj
            format % obj.to_s
        else
            empty
        end
    end

    def class_ical_name(clazz)
        name = "ABB" + clazz.year.to_s

        if clazz.cert and clazz.number
            name += "-#{clazz.short_name}"
            name += "-#{clazz.part}" if clazz.part
        end

        name += "-" + clazz.course if clazz.course
        name += "-" + clazz.expand_cert if clazz.cert

        name
    end

    # See README, JSON object keys
    def json_object_keys(object)

        if object.class == {}.class
            new_obj = {json_object_keys: true, keys: [], values: {}}

           object.each do |key,value|
               new_obj[:keys].push key
               new_obj[:values].store new_obj[:keys].length-1, value
           end
           new_obj # return
        else
            $logger.error "#{__method__} can handly Hashes only!"
            $logger.debug "Object class was: #{object.class}"
        end
    end

    def arrayify(o)
        if o.class.name == [].class.name
            o
        elsif o.respond_to? :to_a
            o.to_a
        else
            [o]
        end
    end
end