Module: Timely::Sources::IcsFile

Defined in:
lib/timely/sources/ics_file.rb

Class Method Summary collapse

Class Method Details

.expand_rrule(rrule, dtstart_ts, dtend_ts, max_occurrences: 365, horizon_days: 365) ⇒ Object

Expand RRULE into occurrence [start_ts, end_ts] pairs



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# File 'lib/timely/sources/ics_file.rb', line 105

def self.expand_rrule(rrule, dtstart_ts, dtend_ts, max_occurrences: 365, horizon_days: 365)
  parts = {}
  rrule.split(';').each do |p|
    k, v = p.split('=', 2)
    parts[k] = v
  end

  freq = parts['FREQ']
  interval = (parts['INTERVAL'] || '1').to_i
  count = parts['COUNT']&.to_i
  until_str = parts['UNTIL']

  until_time = nil
  if until_str
    if until_str.length >= 8
      d = until_str
      until_time = Time.new(d[0,4].to_i, d[4,2].to_i, d[6,2].to_i, 23, 59, 59)
    end
  end

  horizon = Time.at(dtstart_ts) + horizon_days * 86400
  duration = dtend_ts - dtstart_ts

  occurrences = []
  current = Time.at(dtstart_ts)
  n = 0

  loop do
    n += 1
    current = case freq
              when 'DAILY'  then current + interval * 86400
              when 'WEEKLY' then current + interval * 7 * 86400
              when 'MONTHLY'
                y, m = current.year, current.month
                m += interval
                while m > 12; m -= 12; y += 1; end
                d = [current.day, Date.new(y, m, -1).day].min
                Time.new(y, m, d, current.hour, current.min)
              when 'YEARLY'
                y = current.year + interval
                m, d = current.month, current.day
                d = [d, Date.new(y, m, -1).day].min rescue d
                Time.new(y, m, d, current.hour, current.min)
              else
                break
              end

    break if count && n >= count
    break if until_time && current > until_time
    break if current > horizon
    break if occurrences.size >= max_occurrences

    st = current.to_i
    occurrences << [st, st + duration]
  end

  occurrences
end

.import_file(file_path, db, calendar_id: 1) ⇒ Object

Import events from ICS file into database



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# File 'lib/timely/sources/ics_file.rb', line 165

def self.import_file(file_path, db, calendar_id: 1)
  content = File.read(file_path)
  content = content.encode('UTF-8', invalid: :replace, undef: :replace, replace: '?') rescue content.force_encoding('UTF-8').scrub('?')

  events = parse(content)
  imported = 0
  skipped = 0

  events.each do |evt|
    # Skip duplicates: by UID on same calendar, or by title+time across all calendars
    if evt[:uid] && db.event_exists?(calendar_id, evt[:uid])
      skipped += 1
      next
    end
    if db.event_duplicate?(evt[:title], evt[:start_time])
      skipped += 1
      next
    end

    master_id = db.save_event(
      calendar_id: calendar_id,
      external_id: evt[:uid],
      title: evt[:title] || '(No title)',
      description: evt[:description],
      location: evt[:location],
      start_time: evt[:start_time],
      end_time: evt[:end_time],
      all_day: evt[:all_day],
      status: evt[:status] || 'confirmed',
      organizer: evt[:organizer],
      attendees: evt[:attendees],
      alarms: evt[:alarms],
      recurrence_rule: evt[:rrule]
    )
    imported += 1

    # Expand recurring events
    if evt[:rrule] && master_id
      occurrences = expand_rrule(evt[:rrule], evt[:start_time], evt[:end_time])
      occurrences.each do |st, et|
        db.save_event(
          calendar_id: calendar_id,
          external_id: "#{evt[:uid]}_#{st}",
          title: evt[:title] || '(No title)',
          description: evt[:description],
          location: evt[:location],
          start_time: st,
          end_time: et,
          all_day: evt[:all_day],
          status: evt[:status] || 'confirmed',
          organizer: evt[:organizer],
          attendees: evt[:attendees],
          series_master_id: master_id
        )
        imported += 1
      end
    end
  end

  { imported: imported, skipped: skipped }
rescue => e
  { imported: imported || 0, skipped: skipped || 0, error: e.message }
end

.parse(ics_content) ⇒ Object

Parse ICS content, return array of event hashes



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# File 'lib/timely/sources/ics_file.rb', line 8

def self.parse(ics_content)
  events = []
  # Split into VEVENT blocks
  ics_content.scan(/BEGIN:VEVENT(.*?)END:VEVENT/m).each do |match|
    vevent = match[0]
    # Unfold continuation lines (RFC 5545)
    vevent = vevent.gsub(/\r?\n[ \t]/, '')
    evt = parse_vevent(vevent)
    events << evt if evt
  end
  events
end

.parse_dt(vevent, field) ⇒ Object

Parse DTSTART or DTEND from VEVENT text Returns [Time, all_day_boolean]



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# File 'lib/timely/sources/ics_file.rb', line 81

def self.parse_dt(vevent, field)
  if vevent =~ /^#{field};TZID=[^:]*:(\d{8})T(\d{4,6})/i
    d, t = $1, $2
    time = Time.new(d[0,4].to_i, d[4,2].to_i, d[6,2].to_i, t[0,2].to_i, t[2,2].to_i)
    [time, false]
  elsif vevent =~ /^#{field};VALUE=DATE:(\d{8})/i
    d = $1
    [Time.new(d[0,4].to_i, d[4,2].to_i, d[6,2].to_i), true]
  elsif vevent =~ /^#{field}:(\d{8})T(\d{4,6})(Z)?/i
    d, t, utc = $1, $2, $3
    if utc
      Time.utc(d[0,4].to_i, d[4,2].to_i, d[6,2].to_i, t[0,2].to_i, t[2,2].to_i).localtime
    else
      Time.new(d[0,4].to_i, d[4,2].to_i, d[6,2].to_i, t[0,2].to_i, t[2,2].to_i)
    end.then { |time| [time, false] }
  elsif vevent =~ /^#{field}:(\d{8})/i
    d = $1
    [Time.new(d[0,4].to_i, d[4,2].to_i, d[6,2].to_i), true]
  else
    [nil, false]
  end
end

.parse_vevent(vevent) ⇒ Object

Parse a single VEVENT block



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# File 'lib/timely/sources/ics_file.rb', line 22

def self.parse_vevent(vevent)
  event = {}

  # SUMMARY
  event[:title] = $1.strip if vevent =~ /^SUMMARY[^:]*:(.*)$/i

  # DTSTART
  start_time, all_day = parse_dt(vevent, 'DTSTART')
  return nil unless start_time
  event[:start_time] = start_time.to_i
  event[:all_day] = all_day

  # DTEND
  end_time, _ = parse_dt(vevent, 'DTEND')
  event[:end_time] = end_time ? end_time.to_i : (all_day ? start_time.to_i + 86400 : start_time.to_i + 3600)

  # LOCATION
  event[:location] = $1.strip if vevent =~ /^LOCATION[^:]*:(.*)$/i

  # DESCRIPTION
  if vevent =~ /^DESCRIPTION[^:]*:(.*?)(?=^[A-Z])/mi
    desc = $1.gsub(/\\n/, "\n").gsub(/\\,/, ',').gsub(/\\;/, ';').strip
    event[:description] = desc unless desc.empty?
  end

  # ORGANIZER
  if vevent =~ /^ORGANIZER.*CN=([^;:]+)/i
    event[:organizer] = $1.strip
  elsif vevent =~ /^ORGANIZER.*MAILTO:(.+)$/i
    event[:organizer] = $1.strip
  end

  # ATTENDEES
  attendees = vevent.scan(/^ATTENDEE.*CN=([^;:]+)/i).flatten
  event[:attendees] = attendees.map { |a| { 'email' => a.strip } } if attendees.any?

  # STATUS
  event[:status] = $1.strip.downcase if vevent =~ /^STATUS:(.*)$/i

  # UID (used as external_id)
  event[:uid] = $1.strip if vevent =~ /^UID:(.*)$/i

  # RRULE
  event[:rrule] = $1.strip if vevent =~ /^RRULE:(.*)$/i

  # VALARM
  if vevent =~ /TRIGGER[^:]*:(-?)P(?:(\d+)D)?T?(?:(\d+)H)?(?:(\d+)M)?/i
    days = ($2 || 0).to_i
    hours = ($3 || 0).to_i
    mins = ($4 || 0).to_i
    total_mins = days * 1440 + hours * 60 + mins
    event[:alarms] = [total_mins]
  end

  event
end

.watch_incoming(db, calendar_id: 1, dir: nil) ⇒ Object

Check incoming directory for ICS files, import them



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# File 'lib/timely/sources/ics_file.rb', line 230

def self.watch_incoming(db, calendar_id: 1, dir: nil)
  dir ||= File.join(TIMELY_HOME, 'incoming')
  FileUtils.mkdir_p(dir)
  processed_dir = File.join(dir, 'processed')
  FileUtils.mkdir_p(processed_dir)

  total_imported = 0
  Dir.glob(File.join(dir, '*.ics')).each do |file|
    result = import_file(file, db, calendar_id: calendar_id)
    total_imported += result[:imported]
    # Move to processed
    FileUtils.mv(file, File.join(processed_dir, File.basename(file))) rescue nil
  end
  total_imported
end