source: subversion/sites/rails_port/app/models/trace.rb @ 3144

Last change on this file since 3144 was 3144, checked in by tomhughes, 13 years ago

Only validate the presence of a description on create as we have old
records in the database with no description.

File size: 4.2 KB
Line 
1class 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
153end
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