add template support to namespaces

ideas.md

@@ -23,5 +23,3 @@
 
 * Extend `sinatra-content-for` to support Liquid, Radius, Markaby, Nokogiri and
   Builder. At least the first two probably involve patching Tilt.
-
-* Have `sinatra-namespace` support namespace local templates.

lib/sinatra/namespace.rb

@@ -1,3 +1,4 @@
+require 'backports'
 require 'sinatra/base'
 require 'sinatra/decompile'
 
@@ -6,23 +7,34 @@ module Namespace
     def self.new(base, pattern, conditions = {}, &block)
       Module.new do
         extend NamespacedMethods
-        @base, @extensions = base, []
+        include InstanceMethods
+        @base, @extensions    = base, []
         @pattern, @conditions = compile(pattern, conditions)
-
+        @templates            = Hash.new { |h,k| @base.templates[k] }
         namespace = self
-        before { extend namespace }
-        define_method(:error_block!) do |*keys|
-          if block = keys.inject(nil) { |b,k| b ||= namespace.errors[k] }
-            instance_eval(&block)
-          else
-            super(*keys)
-          end
-        end
-
+        before { extend(@namespace = namespace) }
         class_eval(&block)
       end
     end
 
+    module InstanceMethods
+      def settings
+        @namespace
+      end
+
+      def template_cache
+        super.fetch(:nested, @namespace) { Tilt::Cache.new }
+      end
+
+      def error_block!(*keys)
+        if block = keys.inject(nil) { |b,k| b ||= @namespace.errors[k] }
+          instance_eval(&block)
+        else
+          super
+        end
+      end
+    end
+
     module SharedMethods
       def namespace(pattern, conditions = {}, &block)
         Sinatra::Namespace.new(self, pattern, conditions, &block)
@@ -32,7 +44,7 @@ def namespace(pattern, conditions = {}, &block)
     module NamespacedMethods
       include SharedMethods
       include Sinatra::Decompile
-      attr_reader :base
+      attr_reader :base, :templates
 
       def self.prefixed(*names)
         names.each { |n| define_method(n) { |*a, &b| prefixed(n, *a, &b) }}
@@ -75,6 +87,30 @@ def respond_to(*args)
         @conditions[:provides] = args
       end
 
+      def set(key, value = self, &block)
+        raise ArgumentError, "may not set #{key}" if key != :views
+        return key.each { |k,v| set(k, v) } if block.nil? and value == self
+        block ||= proc { value }
+        singleton_class.send(:define_method, key, &block)
+      end
+
+      def enable(*opts)
+        opts.each { |key| set(key, true) }
+      end
+
+      def disable(*opts)
+        opts.each { |key| set(key, false) }
+      end
+
+      def template(name, &block)
+        filename, line = caller_locations.first
+        templates[name] = [block, filename, line.to_i]
+      end
+
+      def layout(name=:layout, &block)
+        template name, &block
+      end
+
       private
 
       def app
@@ -118,8 +154,7 @@ def prefixed(method, pattern = nil, conditions = {}, &block)
       end
 
       def method_missing(meth, *args, &block)
-        return super if args.any? or block or not base.respond_to? meth
-        base.send meth
+        base.send(meth, *args, &block)
       end
     end
 

spec/namespace/foo.erb

@@ -0,0 +1 @@
+hi

spec/namespace/nested/foo.erb

@@ -0,0 +1 @@
+ho

spec/namespace_spec.rb

@@ -490,9 +490,86 @@ def magic
       end
 
       describe 'templates' do
-        it "allows to define nested templates"
-        it "allows to define nested layouts"
-        it "allows setting a different views directory"
+        it "allows using templates from the base" do
+          mock_app do
+            template(:foo) { 'hi' }
+            send(verb, '/') { erb :foo }
+            namespace '/foo' do
+              send(verb) { erb :foo }
+            end
+          end
+
+          if verb != :head
+            send(verb, '/').body.should == "hi"
+            send(verb, '/foo').body.should == "hi"
+          end
+        end
+
+        it "allows to define nested templates" do
+          mock_app do
+            template(:foo) { 'hi' }
+            send(verb, '/') { erb :foo }
+            namespace '/foo' do
+              template(:foo) { 'ho' }
+              send(verb) { erb :foo }
+            end
+          end
+
+          if verb != :head
+            send(verb, '/').body.should == "hi"
+            send(verb, '/foo').body.should == "ho"
+          end
+        end
+
+        it "allows to define nested layouts" do
+          mock_app do
+            layout { 'Hello <%= yield %>!' }
+            template(:foo) { 'World' }
+            send(verb, '/') { erb :foo }
+            namespace '/foo' do
+              layout { 'Hi <%= yield %>!' }
+              send(verb) { erb :foo }
+            end
+          end
+
+          if verb != :head
+            send(verb, '/').body.should == "Hello World!"
+            send(verb, '/foo').body.should == "Hi World!"
+          end
+        end
+
+        it "allows using templates from the base" do
+          mock_app do
+            layout { "he said: <%= yield %>" }
+            template(:foo) { 'hi' }
+            send(verb, '/') { erb :foo }
+            namespace '/foo' do
+              template(:foo) { 'ho' }
+              send(verb) { erb :foo }
+            end
+          end
+
+          if verb != :head
+            send(verb, '/').body.should == "he said: hi"
+            send(verb, '/foo').body.should == "he said: ho"
+          end
+        end
+
+        it "allows setting a different views directory" do
+          mock_app do
+            set :views, File.expand_path('../namespace', __FILE__)
+            send(verb, '/') { erb :foo }
+            namespace('/foo') do
+              set :views, File.expand_path('../namespace/nested', __FILE__)
+              send(verb) { erb :foo }
+            end
+          end
+
+          if verb != :head
+            send(verb, '/').body.should == "hi\n"
+            send(verb, '/foo').body.should == "ho\n"
+          end
+        end
       end
 
       describe 'extensions' do