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[rails.git] / app / models / trace.rb

diff --git a/app/models/trace.rb b/app/models/trace.rb
index 014db4ae2640057ff146bf943f4a32ebcf83a04c..1d0b11d4330888f980b3c69f8cf042f5ff78fdbc 100644 (file)
--- a/app/models/trace.rb
+++ b/app/models/trace.rb
@@ -1,11 +1,333 @@
+# == Schema Information
+#
+# Table name: gpx_files
+#
+#  id          :integer          not null, primary key
+#  user_id     :integer          not null
+#  visible     :boolean          default(TRUE), not null
+#  name        :string           default(""), not null
+#  size        :integer
+#  latitude    :float
+#  longitude   :float
+#  timestamp   :datetime         not null
+#  description :string           default(""), not null
+#  inserted    :boolean          not null
+#  visibility  :enum             default("public"), not null
+#
+# Indexes
+#
+#  gpx_files_timestamp_idx           (timestamp)
+#  gpx_files_user_id_idx             (user_id)
+#  gpx_files_visible_visibility_idx  (visible,visibility)
+#
+# Foreign Keys
+#
+#  gpx_files_user_id_fkey  (user_id => users.id)
+#
+

 class Trace < ActiveRecord::Base
 class Trace < ActiveRecord::Base

-  set_table_name 'gpx_files'
+  self.table_name = "gpx_files"
+
+  belongs_to :user, :counter_cache => true
+  has_many :tags, :class_name => "Tracetag", :foreign_key => "gpx_id", :dependent => :delete_all
+  has_many :points, :class_name => "Tracepoint", :foreign_key => "gpx_id", :dependent => :delete_all
+
+  scope :visible, -> { where(:visible => true) }
+  scope :visible_to, ->(u) { visible.where("visibility IN ('public', 'identifiable') OR user_id = ?", u) }
+  scope :visible_to_all, -> { where(:visibility => %w[public identifiable]) }
+  scope :tagged, ->(t) { joins(:tags).where(:gpx_file_tags => { :tag => t }) }
+
+  validates :user, :presence => true, :associated => true
+  validates :name, :presence => true, :length => 1..255, :characters => true
+  validates :description, :presence => { :on => :create }, :length => 1..255, :characters => true
+  validates :timestamp, :presence => true
+  validates :visibility, :inclusion => %w[private public trackable identifiable]
+
+  def destroy
+    super
+    FileUtils.rm_f(trace_name)
+    FileUtils.rm_f(icon_picture_name)
+    FileUtils.rm_f(large_picture_name)
+  end
+
+  def tagstring
+    tags.collect(&:tag).join(", ")
+  end
+
+  def tagstring=(s)
+    self.tags = if s.include? ","
+                  s.split(/\s*,\s*/).reject { |tag| tag =~ /^\s*$/ }.collect do |tag|
+                    tt = Tracetag.new
+                    tt.tag = tag
+                    tt
+                  end
+                else
+                  # do as before for backwards compatibility:
+                  s.split.collect do |tag|
+                    tt = Tracetag.new
+                    tt.tag = tag
+                    tt
+                  end
+                end
+  end
+
+  def public?
+    visibility == "public" || visibility == "identifiable"
+  end
+
+  def trackable?
+    visibility == "trackable" || visibility == "identifiable"
+  end
+
+  def identifiable?
+    visibility == "identifiable"
+  end
+
+  def large_picture=(data)
+    f = File.new(large_picture_name, "wb")
+    f.syswrite(data)
+    f.close
+  end
+
+  def icon_picture=(data)
+    f = File.new(icon_picture_name, "wb")
+    f.syswrite(data)
+    f.close
+  end
+
+  def large_picture
+    f = File.new(large_picture_name, "rb")
+    data = f.sysread(File.size(f.path))
+    f.close
+    data
+  end
+
+  def icon_picture
+    f = File.new(icon_picture_name, "rb")
+    data = f.sysread(File.size(f.path))
+    f.close
+    data
+  end
+
+  def large_picture_name
+    "#{GPX_IMAGE_DIR}/#{id}.gif"
+  end
+
+  def icon_picture_name
+    "#{GPX_IMAGE_DIR}/#{id}_icon.gif"
+  end
+
+  def trace_name
+    "#{GPX_TRACE_DIR}/#{id}.gpx"
+  end
+
+  def mime_type
+    filetype = `/usr/bin/file -Lbz #{trace_name}`.chomp
+    gzipped = filetype =~ /gzip compressed/
+    bzipped = filetype =~ /bzip2 compressed/
+    zipped = filetype =~ /Zip archive/
+    tarred = filetype =~ /tar archive/
+
+    mimetype = if gzipped
+                 "application/x-gzip"
+               elsif bzipped
+                 "application/x-bzip2"
+               elsif zipped
+                 "application/x-zip"
+               elsif tarred
+                 "application/x-tar"
+               else
+                 "application/gpx+xml"
+               end
+
+    mimetype
+  end
+
+  def extension_name
+    filetype = `/usr/bin/file -Lbz #{trace_name}`.chomp
+    gzipped = filetype =~ /gzip compressed/
+    bzipped = filetype =~ /bzip2 compressed/
+    zipped = filetype =~ /Zip archive/
+    tarred = filetype =~ /tar archive/
+
+    extension = if tarred && gzipped
+                  ".tar.gz"
+                elsif tarred && bzipped
+                  ".tar.bz2"
+                elsif tarred
+                  ".tar"
+                elsif gzipped
+                  ".gpx.gz"
+                elsif bzipped
+                  ".gpx.bz2"
+                elsif zipped
+                  ".zip"
+                else
+                  ".gpx"
+                end

 
 

-  belongs_to :user
+    extension
+  end
+
+  def to_xml
+    doc = OSM::API.new.get_xml_doc
+    doc.root << to_xml_node
+    doc
+  end
+
+  def to_xml_node
+    el1 = XML::Node.new "gpx_file"
+    el1["id"] = id.to_s
+    el1["name"] = name.to_s
+    el1["lat"] = latitude.to_s if inserted
+    el1["lon"] = longitude.to_s if inserted
+    el1["user"] = user.display_name
+    el1["visibility"] = visibility
+    el1["pending"] = inserted ? "false" : "true"
+    el1["timestamp"] = timestamp.xmlschema
+
+    el2 = XML::Node.new "description"
+    el2 << description
+    el1 << el2
+
+    tags.each do |tag|
+      el2 = XML::Node.new("tag")
+      el2 << tag.tag
+      el1 << el2
+    end
+
+    el1
+  end
+
+  def update_from_xml(xml, create = false)
+    p = XML::Parser.string(xml, :options => XML::Parser::Options::NOERROR)
+    doc = p.parse
+
+    doc.find("//osm/gpx_file").each do |pt|
+      return update_from_xml_node(pt, create)
+    end
+
+    raise OSM::APIBadXMLError.new("trace", xml, "XML doesn't contain an osm/gpx_file element.")
+  rescue LibXML::XML::Error, ArgumentError => ex
+    raise OSM::APIBadXMLError.new("trace", xml, ex.message)
+  end
+
+  def update_from_xml_node(pt, create = false)
+    raise OSM::APIBadXMLError.new("trace", pt, "visibility missing") if pt["visibility"].nil?
+
+    self.visibility = pt["visibility"]
+
+    unless create
+      raise OSM::APIBadXMLError.new("trace", pt, "ID is required when updating.") if pt["id"].nil?
+
+      id = pt["id"].to_i
+      # .to_i will return 0 if there is no number that can be parsed.
+      # We want to make sure that there is no id with zero anyway
+      raise OSM::APIBadUserInput, "ID of trace cannot be zero when updating." if id.zero?
+      raise OSM::APIBadUserInput, "The id in the url (#{self.id}) is not the same as provided in the xml (#{id})" unless self.id == id
+    end
+
+    # We don't care about the time, as it is explicitly set on create/update/delete
+    # We don't care about the visibility as it is implicit based on the action
+    # and set manually before the actual delete
+    self.visible = true
+
+    description = pt.find("description").first
+    raise OSM::APIBadXMLError.new("trace", pt, "description missing") if description.nil?

 
 

-  def tags=(bleh)
+    self.description = description.content
+
+    self.tags = pt.find("tag").collect do |tag|
+      Tracetag.new(:tag => tag.content)
+    end

   end
 
   end
 

-  def mime_type=(bleh)
+  def xml_file
+    # TODO: *nix specific, could do to work on windows... would be functionally inferior though - check for '.gz'
+    filetype = `/usr/bin/file -Lbz #{trace_name}`.chomp
+    gzipped = filetype =~ /gzip compressed/
+    bzipped = filetype =~ /bzip2 compressed/
+    zipped = filetype =~ /Zip archive/
+    tarred = filetype =~ /tar archive/
+
+    if gzipped || bzipped || zipped || tarred
+      tmpfile = Tempfile.new("trace.#{id}")
+
+      if tarred && gzipped
+        system("tar -zxOf #{trace_name} > #{tmpfile.path}")
+      elsif tarred && bzipped
+        system("tar -jxOf #{trace_name} > #{tmpfile.path}")
+      elsif tarred
+        system("tar -xOf #{trace_name} > #{tmpfile.path}")
+      elsif gzipped
+        system("gunzip -c #{trace_name} > #{tmpfile.path}")
+      elsif bzipped
+        system("bunzip2 -c #{trace_name} > #{tmpfile.path}")
+      elsif zipped
+        system("unzip -p #{trace_name} -x '__MACOSX/*' > #{tmpfile.path} 2> /dev/null")
+      end
+
+      tmpfile.unlink
+
+      file = tmpfile.file
+    else
+      file = File.open(trace_name)
+    end
+
+    file
+  end
+
+  def import
+    logger.info("GPX Import importing #{name} (#{id}) from #{user.email}")
+
+    gpx = GPX::File.new(xml_file)
+
+    f_lat = 0
+    f_lon = 0
+    first = true
+
+    # If there are any existing points for this trace then delete them
+    Tracepoint.where(:gpx_id => id).delete_all
+
+    gpx.points do |point|
+      if first
+        f_lat = point.latitude
+        f_lon = point.longitude
+        first = false
+      end
+
+      tp = Tracepoint.new
+      tp.lat = point.latitude
+      tp.lon = point.longitude
+      tp.altitude = point.altitude
+      tp.timestamp = point.timestamp
+      tp.gpx_id = id
+      tp.trackid = point.segment
+      tp.save!
+    end
+
+    if gpx.actual_points.positive?
+      max_lat = Tracepoint.where(:gpx_id => id).maximum(:latitude)
+      min_lat = Tracepoint.where(:gpx_id => id).minimum(:latitude)
+      max_lon = Tracepoint.where(:gpx_id => id).maximum(:longitude)
+      min_lon = Tracepoint.where(:gpx_id => id).minimum(:longitude)
+
+      max_lat = max_lat.to_f / 10000000
+      min_lat = min_lat.to_f / 10000000
+      max_lon = max_lon.to_f / 10000000
+      min_lon = min_lon.to_f / 10000000
+
+      self.latitude = f_lat
+      self.longitude = f_lon
+      self.large_picture = gpx.picture(min_lat, min_lon, max_lat, max_lon, gpx.actual_points)
+      self.icon_picture = gpx.icon(min_lat, min_lon, max_lat, max_lon)
+      self.size = gpx.actual_points
+      self.inserted = true
+      save!
+    end
+
+    logger.info "done trace #{id}"
+
+    gpx

   end
 end
   end
 end