list templates

Author: codergeek121

lib/ruby_mcp/handlers.rb

@@ -21,6 +21,8 @@ def self.parse(json)
         ResourcesRead
       when "logging/setLevel"
         LoggingSetLevel
+      when "resources/templates/list"
+        ResourcesTemplatesList
       end.new
     end
   end

lib/ruby_mcp/handlers/resources_templates_list.rb

@@ -0,0 +1,12 @@
+class RubyMCP::Handlers::ResourcesTemplatesList < RubyMCP::Handlers
+  def handle(server, request)
+    server.answer(request, resourceTemplates: server.resources.templates.map do |template, value|
+      {
+        uriTemplate: template,
+        name: value.name,
+        description: value.description,
+        mimeType: value.mime_type
+      }
+    end)
+  end
+end

lib/ruby_mcp/requests.rb

@@ -21,6 +21,8 @@ def self.parse(json)
         ResourcesRead
       when "logging/setLevel"
         LoggingSetLevel
+      when "resources/templates/list"
+        ResourcesTemplatesList
       else
         Request
       end.new(parsed)

lib/ruby_mcp/requests/resources_templates_list.rb

@@ -0,0 +1,5 @@
+class RubyMCP::Requests::ResourcesTemplatesList < RubyMCP::Request
+  def allowed_in_lifecycle?(lifecycle)
+    lifecycle.operation_phase?
+  end
+end

lib/ruby_mcp/resources.rb

@@ -34,6 +34,10 @@ def as_json
       end
     end
 
+    def templates
+      @resource_templates
+    end
+
     private
 
     def find_in_templates(uri)

test/capabilities/test_resources_capability.rb

@@ -159,4 +159,55 @@ def test_read_template
       }
     )
   end
+
+  def test_list_templates
+    @server.add_resource_template(
+      uri_template: "https://{host}.de",
+      name: "german_website",
+      description: "Every german website",
+      mime_type: "text/html",
+      reader: ->(resource) {
+        "The first demo content of #{resource.name}"
+      }
+    )
+
+    @server.add_resource_template(
+      uri_template: "https://{host}.com",
+      name: "com_website",
+      description: "Every com website",
+      mime_type: "text/html",
+      reader: ->(resource) {
+        "The first demo content of #{resource.name}"
+      }
+    )
+
+    @transport.client_message(
+      jsonrpc: "2.0",
+      id: 1,
+      method: "resources/templates/list",
+    )
+
+    @transport.process_message
+
+    assert_last_response(
+      "jsonrpc": "2.0",
+      "id": 1,
+      "result": {
+        "resourceTemplates": [
+          {
+            uriTemplate: "https://{host}.de",
+            name: "german_website",
+            description: "Every german website",
+            mimeType: "text/html"
+          },
+          {
+            uriTemplate: "https://{host}.com",
+            name: "com_website",
+            description: "Every com website",
+            mimeType: "text/html"
+          }
+        ]
+      }
+    )
+  end
 end