Potlatch 0.11b

[rails.git] / lib / osm.rb

diff --git a/lib/osm.rb b/lib/osm.rb
index c132ff25cfc4ef2bcffc40e84a3a714da36bea1b..0a62d14c0c77890ea67a634db4d0ceb5e6a82700 100644 (file)
--- a/lib/osm.rb
+++ b/lib/osm.rb
@@ -11,46 +11,77 @@ module OSM
   # The base class for API Errors.
   class APIError < RuntimeError
     def render_opts
-      { :text => "", :status => :internal_server_error }
+      { :text => "Generic API Error", :status => :internal_server_error, :content_type => "text/plain" }
+    end
+
+    def to_s
+      "Generic API Error"
     end
   end
 
   # Raised when an API object is not found.
   class APINotFoundError < APIError
+    def render_opts
+      { :text => "The API wasn't found", :status => :not_found, :content_type => "text/plain" }
+    end
   end
 
   # Raised when a precondition to an API action fails sanity check.
   class APIPreconditionFailedError < APIError
+    def initialize(message = "")
+      @message = message
+    end
+    
     def render_opts
-      { :text => "", :status => :precondition_failed }
+      { :text => "Precondition failed: #{@message}", :status => :precondition_failed, :content_type => "text/plain" }
+    end
+
+    def to_s
+      "Precondition failed: #{@message}"
     end
   end
 
   # Raised when to delete an already-deleted object.
   class APIAlreadyDeletedError < APIError
+    def initialize(object = "object", object_id = "")
+      @object, @object_id = object, object_id
+    end
+    
+    attr_reader :object, :object_id
+    
     def render_opts
-      { :text => "", :status => :gone }
+      { :text => "The #{object} with the id #{object_id} has already been deleted", :status => :gone, :content_type => "text/plain" }
     end
   end
 
   # Raised when the user logged in isn't the same as the changeset
   class APIUserChangesetMismatchError < APIError
     def render_opts
-      { :text => "The user doesn't own that changeset", :status => :conflict }
+      { :text => "The user doesn't own that changeset", :status => :conflict, :content_type => "text/plain" }
     end
   end
 
   # Raised when the changeset provided is already closed
   class APIChangesetAlreadyClosedError < APIError
+    def initialize(changeset)
+      @changeset = changeset
+    end
+
+    attr_reader :changeset
+    
     def render_opts
-      { :text => "The supplied changeset has already been closed", :status => :conflict }
+      { :text => "The changeset #{@changeset.id} was closed at #{@changeset.closed_at}.", :status => :conflict, :content_type => "text/plain" }
     end
   end
   
   # Raised when a change is expecting a changeset, but the changeset doesn't exist
   class APIChangesetMissingError < APIError
     def render_opts
-      { :text => "You need to supply a changeset to be able to make a change", :status => :conflict }
+      { :text => "You need to supply a changeset to be able to make a change", :status => :conflict, :content_type => "text/plain" }
+    end
+    
+    def to_s
+       "You need to supply a changeset to be able to make a change"
     end
   end
 
@@ -63,7 +94,7 @@ module OSM
     
     def render_opts
       { :text => "Changeset mismatch: Provided #{@provided} but only " +
-        "#{@allowed} is allowed.", :status => :conflict }
+      "#{@allowed} is allowed.", :status => :conflict, :content_type => "text/plain" }
     end
   end
   
@@ -76,20 +107,20 @@ module OSM
     
     def render_opts
       { :text => "Unknown action #{@provided}, choices are create, modify, delete.",
-      :status => :bad_request }
+      :status => :bad_request, :content_type => "text/plain" }
     end
   end
 
   # Raised when bad XML is encountered which stops things parsing as
   # they should.
   class APIBadXMLError < APIError
-    def initialize(model, xml)
-      @model, @xml = model, xml
+    def initialize(model, xml, message="")
+      @model, @xml, @message = model, xml, message
     end
 
     def render_opts
-      { :text => "Cannot parse valid #{@model} from xml string #{@xml}",
-        :status => :bad_request }
+      { :text => "Cannot parse valid #{@model} from xml string #{@xml}. #{@message}",
+      :status => :bad_request, :content_type => "text/plain" }
     end
   end
 
@@ -104,7 +135,11 @@ module OSM
     def render_opts
       { :text => "Version mismatch: Provided " + provided.to_s +
         ", server had: " + latest.to_s + " of " + type + " " + id.to_s, 
-        :status => :conflict }
+        :status => :conflict, :content_type => "text/plain" }
+    end
+    
+    def to_s
+       "Version mismatch: Provided " + provided.to_s + ", server had: " + latest.to_s + " of " + type + " " + id.to_s
     end
   end
 
@@ -119,7 +154,7 @@ module OSM
 
     def render_opts
       { :text => "Element #{@type}/#{@id} has duplicate tags with key #{@tag_key}.",
-        :status => :bad_request }
+        :status => :bad_request, :content_type => "text/plain" }
     end
   end
   
@@ -134,7 +169,19 @@ module OSM
     
     def render_opts
       { :text => "You tried to add #{provided} nodes to the way, however only #{max} are allowed",
-      :status => :bad_request }
+        :status => :bad_request, :content_type => "text/plain" }
+    end
+  end
+
+  ##
+  # raised when user input couldn't be parsed
+  class APIBadUserInput < APIError
+    def initialize(message)
+      @message = message
+    end
+
+    def render_opts
+      { :text => @message, :content_type => "text/plain", :status => :bad_request }
     end
   end
 
@@ -215,7 +262,7 @@ module OSM
   class GeoRSS
     def initialize(feed_title='OpenStreetMap GPS Traces', feed_description='OpenStreetMap GPS Traces', feed_url='http://www.openstreetmap.org/traces/')
       @doc = XML::Document.new
-      @doc.encoding = 'UTF-8' 
+      @doc.encoding = XML::Encoding::UTF_8
 
       rss = XML::Node.new 'rss'
       @doc.root = rss
@@ -301,7 +348,7 @@ module OSM
   class API
     def get_xml_doc
       doc = XML::Document.new
-      doc.encoding = 'UTF-8' 
+      doc.encoding = XML::Encoding::UTF_8
       root = XML::Node.new 'osm'
       root['version'] = API_VERSION
       root['generator'] = GENERATOR