app/models/trace.rb

   1 class Trace < ActiveRecord::Base
   2   set_table_name 'gpx_files'
   3
   4   validates_presence_of :user_id, :name, :public, :timestamp
   5   validates_presence_of :description, :on => :create
   6 #  validates_numericality_of :latitude, :longitude
   7   validates_inclusion_of :inserted, :in => [ true, false]
   8
   9   belongs_to :user
  10   has_many :tags, :class_name => 'Tracetag', :foreign_key => 'gpx_id', :dependent => :delete_all
  11   has_many :points, :class_name => 'Tracepoint', :foreign_key => 'gpx_id', :dependent => :delete_all
  12
  13   def destroy
  14     super
  15     FileUtils.rm_f(trace_name, icon_picture_name, large_picture_name)
  16   end
  17
  18   def tagstring=(s)
  19     self.tags = s.split().collect {|tag|
  20       tt = Tracetag.new
  21       tt.tag = tag
  22       tt
  23     }
  24   end
  25
  26   def large_picture= (data)
  27     f = File.new(large_picture_name, "wb")
  28     f.syswrite(data)
  29     f.close
  30   end
  31
  32   def icon_picture= (data)
  33     f = File.new(icon_picture_name, "wb")
  34     f.syswrite(data)
  35     f.close
  36   end
  37
  38   def large_picture
  39     f = File.new(large_picture_name, "rb")
  40     logger.info "large picture file: '#{f.path}', bytes: #{File.size(f.path)}"
  41     data = f.sysread(File.size(f.path))
  42     logger.info "have read data, bytes: '#{data.length}'"
  43     f.close
  44     data
  45   end
  46
  47   def icon_picture
  48     f = File.new(icon_picture_name, "rb")
  49     logger.info "icon picture file: '#{f.path}'"
  50     data = f.sysread(File.size(f.path))
  51     f.close
  52     data
  53   end
  54
  55   # FIXME change to permanent filestore area
  56   def large_picture_name
  57     "/home/osm/icons/#{id}.gif"
  58   end
  59
  60   # FIXME change to permanent filestore area
  61   def icon_picture_name
  62     "/home/osm/icons/#{id}_icon.gif"
  63   end
  64
  65   def trace_name
  66     "/home/osm/gpx/#{id}.gpx"
  67   end
  68
  69   def to_xml_node
  70     el1 = XML::Node.new 'gpx_file'
  71     el1['id'] = self.id.to_s
  72     el1['name'] = self.name.to_s
  73     el1['lat'] = self.latitude.to_s
  74     el1['lon'] = self.longitude.to_s
  75     el1['user'] = self.user.display_name
  76     el1['public'] = self.public.to_s
  77     el1['pending'] = (!self.inserted).to_s
  78     el1['timestamp'] = self.timestamp.xmlschema
  79     return el1
  80   end
  81
  82   def import
  83     begin
  84       logger.info("GPX Import importing #{name} (#{id}) from #{user.email}")
  85
  86       # TODO *nix specific, could do to work on windows... would be functionally inferior though - check for '.gz'
  87       filetype = `file -b #{trace_name}`.chomp
  88       gzipped = filetype =~ /^gzip/
  89       zipped = filetype =~ /^Zip/
  90
  91       if gzipped
  92         filename = tempfile = "/tmp/#{rand}"
  93         system("gunzip -c #{trace_name} > #{filename}")
  94       elsif zipped
  95         filename = tempfile = "/tmp/#{rand}"
  96         system("unzip -p #{trace_name} > #{filename}")
  97       else
  98         filename = trace_name
  99       end
 100
 101       gpx = OSM::GPXImporter.new(filename)
 102
 103       f_lat = 0
 104       f_lon = 0
 105       first = true
 106
 107       Tracepoint.delete_all(['gpx_id = ?', self.id])
 108
 109       gpx.points do |point|
 110         if first
 111           f_lat = point['latitude']
 112           f_lon = point['longitude']
 113         end
 114
 115         tp = Tracepoint.new
 116         tp.lat = point['latitude'].to_f
 117         tp.lng = point['longitude'].to_f
 118         tp.altitude = point['altitude'].to_f
 119         tp.timestamp = point['timestamp']
 120         tp.user_id = user.id
 121         tp.gpx_id = id
 122         tp.trackid = point['segment'].to_i
 123         tp.save!
 124       end
 125
 126       if gpx.actual_points > 0
 127         max_lat = Tracepoint.maximum('latitude', :conditions => ['gpx_id = ?', id])
 128         min_lat = Tracepoint.minimum('latitude', :conditions => ['gpx_id = ?', id])
 129         max_lon = Tracepoint.maximum('longitude', :conditions => ['gpx_id = ?', id])
 130         min_lon = Tracepoint.minimum('longitude', :conditions => ['gpx_id = ?', id])
 131
 132         max_lat = max_lat.to_f / 1000000
 133         min_lat = min_lat.to_f / 1000000
 134         max_lon = max_lon.to_f / 1000000
 135         min_lon = min_lon.to_f / 1000000
 136
 137         self.latitude = f_lat
 138         self.longitude = f_lon
 139         self.large_picture = gpx.get_picture(min_lat, min_lon, max_lat, max_lon, gpx.actual_points)
 140         self.icon_picture = gpx.get_icon(min_lat, min_lon, max_lat, max_lon)
 141         self.size = gpx.actual_points
 142         self.inserted = true
 143         self.save
 144       end
 145
 146       logger.info "done trace #{id}"
 147
 148       return gpx
 149     ensure
 150       FileUtils.rm_f(tempfile) if tempfile
 151     end
 152   end
 153 end