Refactor AMF respone streaming

[rails.git] / app / controllers / changeset_controller.rb

diff --git a/app/controllers/changeset_controller.rb b/app/controllers/changeset_controller.rb
index f80a938baf96804925617988444452aa570538f0..ca501fd43183cc3d45d09d53b01eb4434064fb70 100644 (file)
--- a/app/controllers/changeset_controller.rb
+++ b/app/controllers/changeset_controller.rb
@@ -16,8 +16,6 @@ class ChangesetController < ApplicationController
   around_filter :api_call_handle_error, :except => [:list]
   around_filter :web_timeout, :only => [:list]
 
   around_filter :api_call_handle_error, :except => [:list]
   around_filter :web_timeout, :only => [:list]
 

-  filter_parameter_logging "<osmChange version"
-

   # Help methods for checking boundary sanity and area size
   include MapBoundary
 
   # Help methods for checking boundary sanity and area size
   include MapBoundary
 


@@ -179,9 +177,7 @@ class ChangesetController < ApplicationController
           created << elt.to_xml_node
         else
           # get the previous version from the element history
           created << elt.to_xml_node
         else
           # get the previous version from the element history

-          prev_elt = elt.class.find(:first, :conditions => 
-                                    ['id = ? and version = ?',
-                                     elt.id, elt.version])
+          prev_elt = elt.class.find([elt.id, elt.version])

           unless elt.visible
             # if the element isn't visible then it must have been deleted, so
             # output the *previous* XML
           unless elt.visible
             # if the element isn't visible then it must have been deleted, so
             # output the *previous* XML


@@ -204,20 +200,18 @@ class ChangesetController < ApplicationController
   def query
     # create the conditions that the user asked for. some or all of
     # these may be nil.
   def query
     # create the conditions that the user asked for. some or all of
     # these may be nil.

-    conditions = conditions_bbox(params['bbox'])
-    conditions = cond_merge conditions, conditions_user(params['user'], params['display_name'])
-    conditions = cond_merge conditions, conditions_time(params['time'])
-    conditions = cond_merge conditions, conditions_open(params['open'])
-    conditions = cond_merge conditions, conditions_closed(params['closed'])
+    changesets = Changeset.scoped
+    changesets = conditions_bbox(changesets, params['bbox'])
+    changesets = conditions_user(changesets, params['user'], params['display_name'])
+    changesets = conditions_time(changesets, params['time'])
+    changesets = conditions_open(changesets, params['open'])
+    changesets = conditions_closed(changesets, params['closed'])

 
     # create the results document
     results = OSM::API.new.get_xml_doc
 
     # add all matching changesets to the XML results document
 
     # create the results document
     results = OSM::API.new.get_xml_doc
 
     # add all matching changesets to the XML results document

-    Changeset.find(:all, 
-                   :conditions => conditions, 
-                   :limit => 100,
-                   :order => 'created_at desc').each do |cs|
+    changesets.order("created_at DESC").limit(100).each do |cs|

       results.root << cs.to_xml_node
     end
 
       results.root << cs.to_xml_node
     end
 


@@ -254,67 +248,68 @@ class ChangesetController < ApplicationController
   ##
   # list edits (open changesets) in reverse chronological order
   def list
   ##
   # list edits (open changesets) in reverse chronological order
   def list

-    conditions = conditions_nonempty
-
-    if params[:display_name]
-      user = User.find_by_display_name(params[:display_name], :conditions => { :status => ["active", "confirmed"] })
+    if request.format == :atom and params[:page]
+      redirect_to params.merge({ :page => nil }), :status => :moved_permanently
+    else
+      changesets = conditions_nonempty(Changeset.scoped)

 
 

-      if user 
-        if user.data_public? or user == @user
-          conditions = cond_merge conditions, ['user_id = ?', user.id]
-        else
-          conditions = cond_merge conditions, ['false']
+      if params[:display_name]
+        user = User.find_by_display_name(params[:display_name])
+        
+        if user and user.active?
+          if user.data_public? or user == @user
+            changesets = changesets.where(:user_id => user.id)
+          else
+            changesets = changesets.where("false")
+          end
+        elsif request.format == :html
+          @title = t 'user.no_such_user.title'
+          @not_found_user = params[:display_name]
+          render :template => 'user/no_such_user', :status => :not_found

         end
         end

-      elsif request.format == :html
-        @title = t 'user.no_such_user.title'
-        @not_found_user = params[:display_name]
-        render :template => 'user/no_such_user', :status => :not_found

       end
       end

-    end
-
-    if params[:bbox]
-      bbox = params[:bbox]
-    elsif params[:minlon] and params[:minlat] and params[:maxlon] and params[:maxlat]
-      bbox = params[:minlon] + ',' + params[:minlat] + ',' + params[:maxlon] + ',' + params[:maxlat]
-    end
-
-    if bbox
-      conditions = cond_merge conditions, conditions_bbox(bbox)
-      bbox = BoundingBox.from_s(bbox)
-      bbox_link = render_to_string :partial => "bbox", :object => bbox
-    end
+      
+      if params[:bbox]
+        bbox = params[:bbox]
+      elsif params[:minlon] and params[:minlat] and params[:maxlon] and params[:maxlat]
+        bbox = params[:minlon] + ',' + params[:minlat] + ',' + params[:maxlon] + ',' + params[:maxlat]
+      end
+      
+      if bbox
+        changesets = conditions_bbox(changesets, bbox)
+        bbox = BoundingBox.from_s(bbox)
+        bbox_link = render_to_string :partial => "bbox", :object => bbox
+      end
+      
+      if user
+        user_link = render_to_string :partial => "user", :object => user
+      end
+      
+      if user and bbox
+        @title =  t 'changeset.list.title_user_bbox', :user => user.display_name, :bbox => bbox.to_s
+        @heading =  t 'changeset.list.heading_user_bbox', :user => user.display_name, :bbox => bbox.to_s
+        @description = t 'changeset.list.description_user_bbox', :user => user_link, :bbox => bbox_link
+      elsif user
+        @title =  t 'changeset.list.title_user', :user => user.display_name
+        @heading =  t 'changeset.list.heading_user', :user => user.display_name
+        @description = t 'changeset.list.description_user', :user => user_link
+      elsif bbox
+        @title =  t 'changeset.list.title_bbox', :bbox => bbox.to_s
+        @heading =  t 'changeset.list.heading_bbox', :bbox => bbox.to_s
+        @description = t 'changeset.list.description_bbox', :bbox => bbox_link
+      else
+        @title =  t 'changeset.list.title'
+        @heading =  t 'changeset.list.heading'
+        @description = t 'changeset.list.description'
+      end

 
 

-    if user
-      user_link = render_to_string :partial => "user", :object => user
-    end
+      @page = (params[:page] || 1).to_i
+      @page_size = 20

 
 

-    if user and bbox
-      @title =  t 'changeset.list.title_user_bbox', :user => user.display_name, :bbox => bbox.to_s
-      @heading =  t 'changeset.list.heading_user_bbox', :user => user.display_name, :bbox => bbox.to_s
-      @description = t 'changeset.list.description_user_bbox', :user => user_link, :bbox => bbox_link
-    elsif user
-      @title =  t 'changeset.list.title_user', :user => user.display_name
-      @heading =  t 'changeset.list.heading_user', :user => user.display_name
-      @description = t 'changeset.list.description_user', :user => user_link
-    elsif bbox
-      @title =  t 'changeset.list.title_bbox', :bbox => bbox.to_s
-      @heading =  t 'changeset.list.heading_bbox', :bbox => bbox.to_s
-      @description = t 'changeset.list.description_bbox', :bbox => bbox_link
-    else
-      @title =  t 'changeset.list.title'
-      @heading =  t 'changeset.list.heading'
-      @description = t 'changeset.list.description'
+      @bbox = bbox
+      
+      @edits = changesets.order("changesets.created_at DESC").offset((@page - 1) * @page_size).limit(@page_size).preload(:user, :changeset_tags)

     end
     end

-
-    @page = (params[:page] || 1).to_i
-    @page_size = 20
-
-    @edits = Changeset.find(:all,
-                            :include => [:user, :changeset_tags],
-                            :conditions => conditions,
-                            :order => "changesets.created_at DESC",
-                            :offset => (@page - 1) * @page_size,
-                            :limit => @page_size)

   end
 
 private
   end
 
 private


@@ -322,43 +317,29 @@ private
   # utility functions below.
   #------------------------------------------------------------  
 
   # utility functions below.
   #------------------------------------------------------------  
 

-  ##
-  # merge two conditions
-  def cond_merge(a, b)
-    if a and b
-      a_str = a.shift
-      b_str = b.shift
-      return [ a_str + " AND " + b_str ] + a + b
-    elsif a 
-      return a
-    else b
-      return b
-    end
-  end
-

   ##
   # if a bounding box was specified then parse it and do some sanity 
   # checks. this is mostly the same as the map call, but without the 
   # area restriction.
   ##
   # if a bounding box was specified then parse it and do some sanity 
   # checks. this is mostly the same as the map call, but without the 
   # area restriction.

-  def conditions_bbox(bbox)
+  def conditions_bbox(changesets, bbox)

     unless bbox.nil?
       raise OSM::APIBadUserInput.new("Bounding box should be min_lon,min_lat,max_lon,max_lat") unless bbox.count(',') == 3
       bbox = sanitise_boundaries(bbox.split(/,/))
       raise OSM::APIBadUserInput.new("Minimum longitude should be less than maximum.") unless bbox[0] <= bbox[2]
       raise OSM::APIBadUserInput.new("Minimum latitude should be less than maximum.") unless bbox[1] <= bbox[3]
     unless bbox.nil?
       raise OSM::APIBadUserInput.new("Bounding box should be min_lon,min_lat,max_lon,max_lat") unless bbox.count(',') == 3
       bbox = sanitise_boundaries(bbox.split(/,/))
       raise OSM::APIBadUserInput.new("Minimum longitude should be less than maximum.") unless bbox[0] <= bbox[2]
       raise OSM::APIBadUserInput.new("Minimum latitude should be less than maximum.") unless bbox[1] <= bbox[3]

-      return ['min_lon < ? and max_lon > ? and min_lat < ? and max_lat > ?',
-              (bbox[2] * GeoRecord::SCALE).to_i,
-              (bbox[0] * GeoRecord::SCALE).to_i,
-              (bbox[3] * GeoRecord::SCALE).to_i,
-              (bbox[1] * GeoRecord::SCALE).to_i]
+      return changesets.where("min_lon < ? and max_lon > ? and min_lat < ? and max_lat > ?",
+                              (bbox[2] * GeoRecord::SCALE).to_i,
+                              (bbox[0] * GeoRecord::SCALE).to_i,
+                              (bbox[3] * GeoRecord::SCALE).to_i,
+                              (bbox[1] * GeoRecord::SCALE).to_i)

     else
     else

-      return nil
+      return changesets

     end
   end
 
   ##
   # restrict changesets to those by a particular user
     end
   end
 
   ##
   # restrict changesets to those by a particular user

-  def conditions_user(user, name)
+  def conditions_user(changesets, user, name)

     unless user.nil? and name.nil?
       # shouldn't provide both name and UID
       raise OSM::APIBadUserInput.new("provide either the user ID or display name, but not both") if user and name
     unless user.nil? and name.nil?
       # shouldn't provide both name and UID
       raise OSM::APIBadUserInput.new("provide either the user ID or display name, but not both") if user and name


@@ -384,15 +365,15 @@ private
         
         raise OSM::APINotFoundError if @user.nil? or @user.id != u.id
       end
         
         raise OSM::APINotFoundError if @user.nil? or @user.id != u.id
       end

-      return ['user_id = ?', u.id]
+      return changesets.where(:user_id => u.id)

     else
     else

-      return nil
+      return changesets

     end
   end
 
   ##
   # restrict changes to those closed during a particular time period
     end
   end
 
   ##
   # restrict changes to those closed during a particular time period

-  def conditions_time(time) 
+  def conditions_time(changesets, time) 

     unless time.nil?
       # if there is a range, i.e: comma separated, then the first is 
       # low, second is high - same as with bounding boxes.
     unless time.nil?
       # if there is a range, i.e: comma separated, then the first is 
       # low, second is high - same as with bounding boxes.


@@ -402,13 +383,13 @@ private
         raise OSM::APIBadUserInput.new("bad time range") if times.size != 2 
 
         from, to = times.collect { |t| DateTime.parse(t) }
         raise OSM::APIBadUserInput.new("bad time range") if times.size != 2 
 
         from, to = times.collect { |t| DateTime.parse(t) }

-        return ['closed_at >= ? and created_at <= ?', from, to]
+        return changesets.where("closed_at >= ? and created_at <= ?", from, to)

       else
         # if there is no comma, assume its a lower limit on time
       else
         # if there is no comma, assume its a lower limit on time

-        return ['closed_at >= ?', DateTime.parse(time)]
+        return changesets.where("closed_at >= ?", DateTime.parse(time))

       end
     else
       end
     else

-      return nil
+      return changesets

     end
     # stupid DateTime seems to throw both of these for bad parsing, so
     # we have to catch both and ensure the correct code path is taken.
     end
     # stupid DateTime seems to throw both of these for bad parsing, so
     # we have to catch both and ensure the correct code path is taken.


@@ -422,25 +403,33 @@ private
   # return changesets which are open (haven't been closed yet)
   # we do this by seeing if the 'closed at' time is in the future. Also if we've
   # hit the maximum number of changes then it counts as no longer open.
   # return changesets which are open (haven't been closed yet)
   # we do this by seeing if the 'closed at' time is in the future. Also if we've
   # hit the maximum number of changes then it counts as no longer open.

-  # if parameter 'open' is nill then open and closed changsets are returned
-  def conditions_open(open)
-    return open.nil? ? nil : ['closed_at >= ? and num_changes <= ?', 
-                              Time.now.getutc, Changeset::MAX_ELEMENTS]
+  # if parameter 'open' is nill then open and closed changesets are returned
+  def conditions_open(changesets, open)
+    if open.nil?
+      return changesets
+    else
+      return changesets.where("closed_at >= ? and num_changes <= ?", 
+                              Time.now.getutc, Changeset::MAX_ELEMENTS)
+    end

   end
   
   ##
   # query changesets which are closed
   # ('closed at' time has passed or changes limit is hit)
   end
   
   ##
   # query changesets which are closed
   # ('closed at' time has passed or changes limit is hit)

-  def conditions_closed(closed)
-    return closed.nil? ? nil : ['closed_at < ? or num_changes > ?', 
-                                Time.now.getutc, Changeset::MAX_ELEMENTS]
+  def conditions_closed(changesets, closed)
+    if closed.nil?
+      return changesets
+    else
+      return changesets.where("closed_at < ? or num_changes > ?", 
+                              Time.now.getutc, Changeset::MAX_ELEMENTS)
+    end

   end
 
   ##
   # eliminate empty changesets (where the bbox has not been set)
   # this should be applied to all changeset list displays
   end
 
   ##
   # eliminate empty changesets (where the bbox has not been set)
   # this should be applied to all changeset list displays

-  def conditions_nonempty()
-    return ['min_lat IS NOT NULL']
+  def conditions_nonempty(changesets)
+    return changesets.where("num_changes > 0")

   end
   
 end
   end
   
 end