Remove some (hopefully) redundant code

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

diff --git a/app/models/trace.rb b/app/models/trace.rb
index ed0ba72e8a707b3ad9ede5de19495bee09f0c517..bf8d3731b8e7709a348a7b469fdeef0afd52a7e3 100644 (file)
--- a/app/models/trace.rb
+++ b/app/models/trace.rb
@@ -1,14 +1,22 @@
 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 => ["public", "identifiable"]) }
+  scope :tagged, ->(t) { joins(:tags).where(:gpx_file_tags => { :tag => t }) }

 
   validates_presence_of :user_id, :name, :timestamp
   validates_presence_of :description, :on => :create
 
   validates_presence_of :user_id, :name, :timestamp
   validates_presence_of :description, :on => :create

+  validates_length_of :name, :maximum => 255
+  validates_length_of :description, :maximum => 255

 #  validates_numericality_of :latitude, :longitude
 #  validates_numericality_of :latitude, :longitude

-  validates_inclusion_of :public, :inserted, :in => [ true, false]
-  
-  belongs_to :user
-  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
+  validates_inclusion_of :inserted, :in => [ true, false ]
+  validates_inclusion_of :visibility, :in => ["private", "public", "trackable", "identifiable"]

 
   def destroy
     super
 
   def destroy
     super


@@ -18,17 +26,38 @@ class Trace < ActiveRecord::Base
   end
 
   def tagstring
   end
 
   def tagstring

-    return tags.collect {|tt| tt.tag}.join(" ")
+    return tags.collect {|tt| tt.tag}.join(", ")

   end
 
   def tagstring=(s)
   end
 
   def tagstring=(s)

-    self.tags = s.split().collect {|tag|
-      tt = Tracetag.new
-      tt.tag = tag
-      tt
-    }
+    if s.include? ','
+      self.tags = s.split(/\s*,\s*/).select {|tag| tag !~ /^\s*$/}.collect {|tag|
+        tt = Tracetag.new
+        tt.tag = tag
+        tt
+      }
+    else
+      #do as before for backwards compatibility:
+      self.tags = s.split().collect {|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)
   def large_picture= (data)
     f = File.new(large_picture_name, "wb")
     f.syswrite(data)


@@ -58,22 +87,20 @@ class Trace < ActiveRecord::Base
     data
   end
   
     data
   end
   

-  # FIXME change to permanent filestore area

   def large_picture_name
   def large_picture_name

-    "/home/osm/icons/#{id}.gif"
+    "#{GPX_IMAGE_DIR}/#{id}.gif"

   end
 
   end
 

-  # FIXME change to permanent filestore area

   def icon_picture_name
   def icon_picture_name

-    "/home/osm/icons/#{id}_icon.gif"
+    "#{GPX_IMAGE_DIR}/#{id}_icon.gif"

   end
 
   def trace_name
   end
 
   def trace_name

-    "/home/osm/gpx/#{id}.gpx"
+    "#{GPX_TRACE_DIR}/#{id}.gpx"

   end
 
   def mime_type
   end
 
   def mime_type

-    filetype = `file -bz #{trace_name}`.chomp
+    filetype = `/usr/bin/file -bz #{trace_name}`.chomp

     gzipped = filetype =~ /gzip compressed/
     bzipped = filetype =~ /bzip2 compressed/
     zipped = filetype =~ /Zip archive/
     gzipped = filetype =~ /gzip compressed/
     bzipped = filetype =~ /bzip2 compressed/
     zipped = filetype =~ /Zip archive/


@@ -85,14 +112,14 @@ class Trace < ActiveRecord::Base
     elsif zipped
       mimetype = "application/x-zip"
     else
     elsif zipped
       mimetype = "application/x-zip"
     else

-      mimetype = "text/xml"
+      mimetype = "application/gpx+xml"

     end
 
     return mimetype
   end
 
   def extension_name
     end
 
     return mimetype
   end
 
   def extension_name

-    filetype = `file -bz #{trace_name}`.chomp
+    filetype = `/usr/bin/file -bz #{trace_name}`.chomp

     gzipped = filetype =~ /gzip compressed/
     bzipped = filetype =~ /bzip2 compressed/
     zipped = filetype =~ /Zip archive/
     gzipped = filetype =~ /gzip compressed/
     bzipped = filetype =~ /bzip2 compressed/
     zipped = filetype =~ /Zip archive/


@@ -127,98 +154,162 @@ class Trace < ActiveRecord::Base
     el1 = XML::Node.new 'gpx_file'
     el1['id'] = self.id.to_s
     el1['name'] = self.name.to_s
     el1 = XML::Node.new 'gpx_file'
     el1['id'] = self.id.to_s
     el1['name'] = self.name.to_s

-    el1['lat'] = self.latitude.to_s
-    el1['lon'] = self.longitude.to_s
+    el1['lat'] = self.latitude.to_s if self.inserted
+    el1['lon'] = self.longitude.to_s if self.inserted

     el1['user'] = self.user.display_name
     el1['user'] = self.user.display_name

-    el1['public'] = self.public.to_s
+    el1['visibility'] = self.visibility

     el1['pending'] = (!self.inserted).to_s
     el1['timestamp'] = self.timestamp.xmlschema
     el1['pending'] = (!self.inserted).to_s
     el1['timestamp'] = self.timestamp.xmlschema

+
+    el2 = XML::Node.new 'description'
+    el2 << self.description
+    el1 << el2
+
+    self.tags.each do |tag|
+      el2 = XML::Node.new('tag')
+      el2 << tag.tag
+      el1 << el2
+    end
+

     return el1
   end
 
     return el1
   end
 

-  def import
+  # Read in xml as text and return it's Node object representation
+  def self.from_xml(xml, create=false)

     begin
     begin

-      logger.info("GPX Import importing #{name} (#{id}) from #{user.email}")
+      p = XML::Parser.string(xml)
+      doc = p.parse
+
+      doc.find('//osm/gpx_file').each do |pt|
+        return Trace.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
+  end
+
+  def self.from_xml_node(pt, create=false)
+    trace = Trace.new
+    
+    raise OSM::APIBadXMLError.new("trace", pt, "visibility missing") if pt['visibility'].nil?
+    trace.visibility = pt['visibility']
+
+    unless create
+      raise OSM::APIBadXMLError.new("trace", pt, "ID is required when updating.") if pt['id'].nil?
+      trace.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.new("ID of trace cannot be zero when updating.") if trace.id == 0
+    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
+    trace.visible = true
+
+    description = pt.find('description').first
+    raise OSM::APIBadXMLError.new("trace", pt, "description missing") if description.nil?
+    trace.description = description.content
+
+    pt.find('tag').each do |tag|
+      trace.tags.build(:tag => tag.content)
+    end

 
 

-      # TODO *nix specific, could do to work on windows... would be functionally inferior though - check for '.gz'
-      filetype = `file -bz #{trace_name}`.chomp
-      gzipped = filetype =~ /gzip compressed/
-      bzipped = filetype =~ /bzip2 compressed/
-      zipped = filetype =~ /Zip archive/
-      tarred = filetype =~ /tar archive/
+    return trace
+  end
+
+  def xml_file
+    # TODO *nix specific, could do to work on windows... would be functionally inferior though - check for '.gz'
+    filetype = `/usr/bin/file -bz #{trace_name}`.chomp
+    gzipped = filetype =~ /gzip compressed/
+    bzipped = filetype =~ /bzip2 compressed/
+    zipped = filetype =~ /Zip archive/
+    tarred = filetype =~ /tar archive/
+
+    if gzipped or bzipped or zipped or tarred then
+      tmpfile = Tempfile.new("trace.#{id}");

 
       if tarred and gzipped then
 
       if tarred and gzipped then

-        filename = tempfile = "/tmp/#{rand}"
-        system("tar -zxOf #{trace_name} > #{filename}")
+        system("tar -zxOf #{trace_name} > #{tmpfile.path}")

       elsif tarred and bzipped then
       elsif tarred and bzipped then

-        filename = tempfile = "/tmp/#{rand}"
-        system("tar -jxOf #{trace_name} > #{filename}")
+        system("tar -jxOf #{trace_name} > #{tmpfile.path}")

       elsif tarred
       elsif tarred

-        filename = tempfile = "/tmp/#{rand}"
-        system("tar -xOf #{trace_name} > #{filename}")
+        system("tar -xOf #{trace_name} > #{tmpfile.path}")

       elsif gzipped
       elsif gzipped

-        filename = tempfile = "/tmp/#{rand}"
-        system("gunzip -c #{trace_name} > #{filename}")
+        system("gunzip -c #{trace_name} > #{tmpfile.path}")

       elsif bzipped
       elsif bzipped

-        filename = tempfile = "/tmp/#{rand}"
-        system("bunzip2 -c #{trace_name} > #{filename}")
+        system("bunzip2 -c #{trace_name} > #{tmpfile.path}")

       elsif zipped
       elsif zipped

-        filename = tempfile = "/tmp/#{rand}"
-        system("unzip -p #{trace_name} > #{filename}")
-      else
-        filename = trace_name
+        system("unzip -p #{trace_name} -x '__MACOSX/*' > #{tmpfile.path}")

       end
 
       end
 

-      gpx = OSM::GPXImporter.new(filename)
-
-      f_lat = 0
-      f_lon = 0
-      first = true
-
-      Tracepoint.delete_all(['gpx_id = ?', self.id])
-
-      gpx.points do |point|
-        if first
-          f_lat = point['latitude']
-          f_lon = point['longitude']
-        end
-
-        tp = Tracepoint.new
-        tp.lat = point['latitude'].to_f
-        tp.lng = point['longitude'].to_f
-        tp.altitude = point['altitude'].to_f
-        tp.timestamp = point['timestamp']
-        tp.user_id = user.id
-        tp.gpx_id = id
-        tp.trackid = point['segment'].to_i
-        tp.save!
-      end
+      tmpfile.unlink

 
 

-      if gpx.actual_points > 0
-        max_lat = Tracepoint.maximum('latitude', :conditions => ['gpx_id = ?', id])
-        min_lat = Tracepoint.minimum('latitude', :conditions => ['gpx_id = ?', id])
-        max_lon = Tracepoint.maximum('longitude', :conditions => ['gpx_id = ?', id])
-        min_lon = Tracepoint.minimum('longitude', :conditions => ['gpx_id = ?', id])
-
-        max_lat = max_lat.to_f / 1000000
-        min_lat = min_lat.to_f / 1000000
-        max_lon = max_lon.to_f / 1000000
-        min_lon = min_lon.to_f / 1000000
-
-        self.latitude = f_lat
-        self.longitude = f_lon
-        self.large_picture = gpx.get_picture(min_lat, min_lon, max_lat, max_lon, gpx.actual_points)
-        self.icon_picture = gpx.get_icon(min_lat, min_lon, max_lat, max_lon)
-        self.size = gpx.actual_points
-        self.inserted = true
-        self.save
+      file = tmpfile.file
+    else
+      file = File.open(trace_name)
+    end
+
+    return file
+  end
+
+  def import
+    logger.info("GPX Import importing #{name} (#{id}) from #{user.email}")
+
+    gpx = GPX::File.new(self.xml_file)
+
+    f_lat = 0
+    f_lon = 0
+    first = true
+
+    # If there are any existing points for this trace then delete
+    # them - we check for existing points first to avoid locking
+    # the table in the common case where there aren't any.
+    if Tracepoint.where(:gpx_id => self.id).exists?
+      Tracepoint.delete_all(:gpx_id => self.id)
+    end
+
+    gpx.points do |point|
+      if first
+        f_lat = point.latitude
+        f_lon = point.longitude
+        first = false

       end
 
       end
 

-      logger.info "done trace #{id}"
+      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 > 0
+      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)

 
 

-      return gpx
-    ensure
-      FileUtils.rm_f(tempfile) if tempfile
+      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
+      self.save!

     end
     end

+
+    logger.info "done trace #{id}"
+
+    return gpx

   end
 end
   end
 end