initial changeset support

app/controllers/changeset_controller.rb

@@ -0,0 +1,26 @@
+# The ChangesetController is the RESTful interface to Changeset objects
+
+class ChangesetController < ApplicationController
+  require 'xml/libxml'
+
+  before_filter :authorize, :only => [:create, :update, :delete]
+  before_filter :check_write_availability, :only => [:create, :update, :delete]
+  before_filter :check_read_availability, :except => [:create, :update, :delete]
+
+  # Create a changeset from XML.
+  def create
+    if request.put?
+      cs = Changeset.from_xml(request.raw_post, true)
+
+      if cs
+        cs.user_id = @user.id
+        cs.save_with_tags!
+        render :text => cs.id.to_s, :content_type => "text/plain"
+      else
+        render :nothing => true, :status => :bad_request
+      end
+    else
+      render :nothing => true, :status => :method_not_allowed
+    end
+  end
+end

app/controllers/changeset_tag_controller.rb

@@ -0,0 +1,9 @@
+class ChangesetTagController < ApplicationController
+  layout 'site'
+
+  def search
+    @tags = ChangesetTag.find(:all, :limit => 11, :conditions => ["match(v) against (?)", params[:query][:query].to_s] )
+  end
+
+
+end

app/models/changeset.rb

@@ -0,0 +1,73 @@
+class Changeset < ActiveRecord::Base
+  require 'xml/libxml'
+
+  belongs_to :user
+
+  has_many :changeset_tags, :foreign_key => 'id'
+
+  def self.from_xml(xml, create=false)
+    begin
+      p = XML::Parser.new
+      p.string = xml
+      doc = p.parse
+
+      cs = Changeset.new
+
+      doc.find('//osm/changeset').each do |pt|
+        if create
+          cs.created_at = Time.now
+        end
+
+        pt.find('tag').each do |tag|
+          cs.add_tag_keyval(tag['k'], tag['v'])
+        end
+      end
+    rescue Exception => ex
+    print "noes "+ ex.to_s + "\n"
+      cs = nil
+    end
+
+    return cs
+  end
+
+  def tags
+    unless @tags
+      @tags = {}
+      self.changeset_tags.each do |tag|
+        @tags[tag.k] = tag.v
+      end
+    end
+    @tags
+  end
+
+  def tags=(t)
+    @tags = t
+  end
+
+  def add_tag_keyval(k, v)
+    @tags = Hash.new unless @tags
+    @tags[k] = v
+  end
+
+  def save_with_tags!
+    t = Time.now
+
+    Changeset.transaction do
+      # fixme update modified_at time?
+      self.save!
+    end
+
+    ChangesetTag.transaction do
+      tags = self.tags
+      ChangesetTag.delete_all(['id = ?', self.id])
+
+      tags.each do |k,v|
+        tag = ChangesetTag.new
+        tag.k = k
+        tag.v = v
+        tag.id = self.id
+        tag.save!
+      end
+    end
+  end
+end

app/models/changeset_tag.rb

@@ -0,0 +1,5 @@
+class ChangesetTag < ActiveRecord::Base
+
+  belongs_to :changeset, :foreign_key => 'id'
+
+end