Improve formatting of note descriptions in GPX and RSS responses

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

diff --git a/app/models/changeset.rb b/app/models/changeset.rb
index 3e0ba9f8ef1d5c48efaf60eea3ebe118190d08b8..8f9a1e69b57f2adee2a7b3a728c9bf38fae2c22a 100644 (file)
--- a/app/models/changeset.rb
+++ b/app/models/changeset.rb
@@ -4,14 +4,14 @@ class Changeset < ActiveRecord::Base
   belongs_to :user
 
   has_many :changeset_tags, :foreign_key => 'id'
   belongs_to :user
 
   has_many :changeset_tags, :foreign_key => 'id'

-  
+

   has_many :nodes
   has_many :ways
   has_many :relations
   has_many :old_nodes
   has_many :old_ways
   has_many :old_relations
   has_many :nodes
   has_many :ways
   has_many :relations
   has_many :old_nodes
   has_many :old_ways
   has_many :old_relations

-  
+

   validates_presence_of :id, :on => :update
   validates_presence_of :user_id, :created_at, :closed_at, :num_changes
   validates_uniqueness_of :id
   validates_presence_of :id, :on => :update
   validates_presence_of :user_id, :created_at, :closed_at, :num_changes
   validates_uniqueness_of :id


@@ -19,7 +19,6 @@ class Changeset < ActiveRecord::Base
   validates_numericality_of :min_lat, :max_lat, :min_lon, :max_lat, :allow_nil => true, :integer_only => true
   validates_numericality_of :user_id,  :integer_only => true
   validates_numericality_of :num_changes, :integer_only => true, :greater_than_or_equal_to => 0
   validates_numericality_of :min_lat, :max_lat, :min_lon, :max_lat, :allow_nil => true, :integer_only => true
   validates_numericality_of :user_id,  :integer_only => true
   validates_numericality_of :num_changes, :integer_only => true, :greater_than_or_equal_to => 0

-  validates_associated :user

 
   # over-expansion factor to use when updating the bounding box
   EXPAND = 0.1
 
   # over-expansion factor to use when updating the bounding box
   EXPAND = 0.1


@@ -27,58 +26,59 @@ class Changeset < ActiveRecord::Base
   # maximum number of elements allowed in a changeset
   MAX_ELEMENTS = 50000
 
   # maximum number of elements allowed in a changeset
   MAX_ELEMENTS = 50000
 

-  # maximum time a changeset is allowed to be open for (note that this
-  # is in days - so one hour is Rational(1,24)).
-  MAX_TIME_OPEN = 1
+  # maximum time a changeset is allowed to be open for.
+  MAX_TIME_OPEN = 1.day

 
 

-  # idle timeout increment, one hour as a rational number of days.
-  # NOTE: DO NOT CHANGE THIS TO 1.hour! when this was done the idle
-  # timeout changed to 1 second, which meant all changesets closed 
-  # almost immediately.
-  IDLE_TIMEOUT = Rational(1,24)
+  # idle timeout increment, one hour seems reasonable.
+  IDLE_TIMEOUT = 1.hour

 
   # Use a method like this, so that we can easily change how we
 
   # Use a method like this, so that we can easily change how we

-  # determine whether a changeset is open, without breaking code in at 
+  # determine whether a changeset is open, without breaking code in at

   # least 6 controllers
   def is_open?
     # a changeset is open (that is, it will accept further changes) when
     # it has not yet run out of time and its capacity is small enough.
     # note that this may not be a hard limit - due to timing changes and
   # least 6 controllers
   def is_open?
     # a changeset is open (that is, it will accept further changes) when
     # it has not yet run out of time and its capacity is small enough.
     # note that this may not be a hard limit - due to timing changes and

-    # concurrency it is possible that some changesets may be slightly 
+    # concurrency it is possible that some changesets may be slightly

     # longer than strictly allowed or have slightly more changes in them.
     # longer than strictly allowed or have slightly more changes in them.

-    return ((closed_at > DateTime.now) and (num_changes <= MAX_ELEMENTS))
+    return ((closed_at > Time.now.getutc) and (num_changes <= MAX_ELEMENTS))

   end
 
   def set_closed_time_now
   end
 
   def set_closed_time_now

-    unless is_open?
-      self.closed_at = DateTime.now
+    if is_open?
+      self.closed_at = Time.now.getutc

     end
   end
     end
   end

-  
+

   def self.from_xml(xml, create=false)
     begin
   def self.from_xml(xml, create=false)
     begin

-      p = XML::Parser.new
-      p.string = xml
+      p = XML::Parser.string(xml)

       doc = p.parse
 
       doc = p.parse
 

-      cs = Changeset.new
-

       doc.find('//osm/changeset').each do |pt|
       doc.find('//osm/changeset').each do |pt|

-        if create
-          cs.created_at = Time.now
-          # initial close time is 1h ahead, but will be increased on each
-          # modification.
-          cs.closed_at = Time.now + IDLE_TIMEOUT
-          # initially we have no changes in a changeset
-          cs.num_changes = 0
-        end
-
-        pt.find('tag').each do |tag|
-          cs.add_tag_keyval(tag['k'], tag['v'])
-        end
+        return Changeset.from_xml_node(pt, create)

       end
       end

-    rescue Exception => ex
-      cs = nil
+      raise OSM::APIBadXMLError.new("changeset", xml, "XML doesn't contain an osm/changeset element.")
+    rescue LibXML::XML::Error, ArgumentError => ex
+      raise OSM::APIBadXMLError.new("changeset", xml, ex.message)
+    end
+  end
+
+  def self.from_xml_node(pt, create=false)
+    cs = Changeset.new
+    if create
+      cs.created_at = Time.now.getutc
+      # initial close time is 1h ahead, but will be increased on each
+      # modification.
+      cs.closed_at = cs.created_at + IDLE_TIMEOUT
+      # initially we have no changes in a changeset
+      cs.num_changes = 0
+    end
+
+    pt.find('tag').each do |tag|
+      raise OSM::APIBadXMLError.new("changeset", pt, "tag is missing key") if tag['k'].nil?
+      raise OSM::APIBadXMLError.new("changeset", pt, "tag is missing value") if tag['v'].nil?
+      cs.add_tag_keyval(tag['k'], tag['v'])

     end
 
     return cs
     end
 
     return cs


@@ -91,26 +91,45 @@ class Changeset < ActiveRecord::Base
     @bbox ||= [ min_lon, min_lat, max_lon, max_lat ]
   end
 
     @bbox ||= [ min_lon, min_lat, max_lon, max_lat ]
   end
 

+  def has_valid_bbox?
+    not bbox.include? nil
+  end
+
+  ##
+  # returns area of the changset bbox as a rough comparitive quantity for use of changset displays
+  def area
+     if has_valid_bbox?
+       (max_lon - min_lon) * (max_lat - min_lat)
+     else
+       0
+     end
+  end
+

   ##
   ##

-  # expand the bounding box to include the given bounding box. also, 
+  # expand the bounding box to include the given bounding box. also,

   # expand a little bit more in the direction of the expansion, so that
   # expand a little bit more in the direction of the expansion, so that

-  # further expansions may be unnecessary. this is an optimisation 
+  # further expansions may be unnecessary. this is an optimisation

   # suggested on the wiki page by kleptog.
   def update_bbox!(array)
     # ensure that bbox is cached and has no nils in it. if there are any
     # nils, just use the bounding box update to write over them.
     @bbox = bbox.zip(array).collect { |a, b| a.nil? ? b : a }
 
   # suggested on the wiki page by kleptog.
   def update_bbox!(array)
     # ensure that bbox is cached and has no nils in it. if there are any
     # nils, just use the bounding box update to write over them.
     @bbox = bbox.zip(array).collect { |a, b| a.nil? ? b : a }
 

-    # FIXME - this looks nasty and violates DRY... is there any prettier 
-    # way to do this? 
-    @bbox[0] = array[0] + EXPAND * (@bbox[0] - @bbox[2]) if array[0] < @bbox[0]
-    @bbox[1] = array[1] + EXPAND * (@bbox[1] - @bbox[3]) if array[1] < @bbox[1]
-    @bbox[2] = array[2] + EXPAND * (@bbox[2] - @bbox[0]) if array[2] > @bbox[2]
-    @bbox[3] = array[3] + EXPAND * (@bbox[3] - @bbox[1]) if array[3] > @bbox[3]
-
-    # update active record. rails 2.1's dirty handling should take care of
-    # whether this object needs saving or not.
-    self.min_lon, self.min_lat, self.max_lon, self.max_lat = @bbox
+    # only try to update the bbox if there is a value for every coordinate
+    # which there will be from the previous line as long as both array and
+    # bbox are all non-nil. 
+    if has_valid_bbox? and array.all?
+      # FIXME - this looks nasty and violates DRY... is there any prettier
+      # way to do this?
+      @bbox[0] = [-180 * GeoRecord::SCALE, array[0] + EXPAND * (@bbox[0] - @bbox[2])].max if array[0] < @bbox[0]
+      @bbox[1] = [ -90 * GeoRecord::SCALE, array[1] + EXPAND * (@bbox[1] - @bbox[3])].max if array[1] < @bbox[1]
+      @bbox[2] = [ 180 * GeoRecord::SCALE, array[2] + EXPAND * (@bbox[2] - @bbox[0])].min if array[2] > @bbox[2]
+      @bbox[3] = [  90 * GeoRecord::SCALE, array[3] + EXPAND * (@bbox[3] - @bbox[1])].min if array[3] > @bbox[3]
+      
+      # update active record. rails 2.1's dirty handling should take care of
+      # whether this object needs saving or not.
+      self.min_lon, self.min_lat, self.max_lon, self.max_lat = @bbox
+    end

   end
 
   ##
   end
 
   ##


@@ -141,23 +160,18 @@ class Changeset < ActiveRecord::Base
 
   def add_tag_keyval(k, v)
     @tags = Hash.new unless @tags
 
   def add_tag_keyval(k, v)
     @tags = Hash.new unless @tags

+
+    # duplicate tags are now forbidden, so we can't allow values
+    # in the hash to be overwritten.
+    raise OSM::APIDuplicateTagsError.new("changeset", self.id, k) if @tags.include? k
+

     @tags[k] = v
   end
 
   def save_with_tags!
     @tags[k] = v
   end
 
   def save_with_tags!

-    t = Time.now
-

     # do the changeset update and the changeset tags update in the
     # same transaction to ensure consistency.
     Changeset.transaction do
     # do the changeset update and the changeset tags update in the
     # same transaction to ensure consistency.
     Changeset.transaction do

-      # set the auto-close time to be one hour in the future unless
-      # that would make it more than 24h long, in which case clip to
-      # 24h, as this has been decided is a reasonable time limit.
-      if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT)
-        self.closed_at = created_at + MAX_TIME_OPEN
-      else
-        self.closed_at = DateTime.now + IDLE_TIMEOUT
-      end

       self.save!
 
       tags = self.tags
       self.save!
 
       tags = self.tags


@@ -172,13 +186,27 @@ class Changeset < ActiveRecord::Base
       end
     end
   end
       end
     end
   end

-  
+
+  ##
+  # set the auto-close time to be one hour in the future unless
+  # that would make it more than 24h long, in which case clip to
+  # 24h, as this has been decided is a reasonable time limit.
+  def before_save
+    if self.is_open?
+      if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT)
+        self.closed_at = created_at + MAX_TIME_OPEN
+      else
+        self.closed_at = Time.now.getutc + IDLE_TIMEOUT
+      end
+    end
+  end
+

   def to_xml
     doc = OSM::API.new.get_xml_doc
     doc.root << to_xml_node()
     return doc
   end
   def to_xml
     doc = OSM::API.new.get_xml_doc
     doc.root << to_xml_node()
     return doc
   end

-  
+

   def to_xml_node(user_display_name_cache = nil)
     el1 = XML::Node.new 'changeset'
     el1['id'] = self.id.to_s
   def to_xml_node(user_display_name_cache = nil)
     el1 = XML::Node.new 'changeset'
     el1['id'] = self.id.to_s


@@ -202,7 +230,7 @@ class Changeset < ActiveRecord::Base
       el2['v'] = v.to_s
       el1 << el2
     end
       el2['v'] = v.to_s
       el1 << el2
     end

-    
+

     el1['created_at'] = self.created_at.xmlschema
     el1['closed_at'] = self.closed_at.xmlschema unless is_open?
     el1['open'] = is_open?.to_s
     el1['created_at'] = self.created_at.xmlschema
     el1['closed_at'] = self.closed_at.xmlschema unless is_open?
     el1['open'] = is_open?.to_s


@@ -211,7 +239,7 @@ class Changeset < ActiveRecord::Base
     el1['min_lat'] = (bbox[1].to_f / GeoRecord::SCALE).to_s unless bbox[1].nil?
     el1['max_lon'] = (bbox[2].to_f / GeoRecord::SCALE).to_s unless bbox[2].nil?
     el1['max_lat'] = (bbox[3].to_f / GeoRecord::SCALE).to_s unless bbox[3].nil?
     el1['min_lat'] = (bbox[1].to_f / GeoRecord::SCALE).to_s unless bbox[1].nil?
     el1['max_lon'] = (bbox[2].to_f / GeoRecord::SCALE).to_s unless bbox[2].nil?
     el1['max_lat'] = (bbox[3].to_f / GeoRecord::SCALE).to_s unless bbox[3].nil?

-    
+

     # NOTE: changesets don't include the XML of the changes within them,
     # they are just structures for tagging. to get the osmChange of a
     # changeset, see the download method of the controller.
     # NOTE: changesets don't include the XML of the changes within them,
     # they are just structures for tagging. to get the osmChange of a
     # changeset, see the download method of the controller.


@@ -225,10 +253,10 @@ class Changeset < ActiveRecord::Base
   # bounding box, only the tags of the changeset.
   def update_from(other, user)
     # ensure that only the user who opened the changeset may modify it.
   # bounding box, only the tags of the changeset.
   def update_from(other, user)
     # ensure that only the user who opened the changeset may modify it.

-    unless user.id == self.user_id 
-      raise OSM::APIUserChangesetMismatchError 
+    unless user.id == self.user_id
+      raise OSM::APIUserChangesetMismatchError.new

     end
     end

-    
+

     # can't change a closed changeset
     unless is_open?
       raise OSM::APIChangesetAlreadyClosedError.new(self)
     # can't change a closed changeset
     unless is_open?
       raise OSM::APIChangesetAlreadyClosedError.new(self)