1 files changed, 119 insertions, 0 deletions
diff --git a/crates/shirabe-external-packages/src/symfony/console/descriptor/descriptor.rs b/crates/shirabe-external-packages/src/symfony/console/descriptor/descriptor.rs
new file mode 100644
index 0000000..d4aa575
--- /dev/null
+++ b/crates/shirabe-external-packages/src/symfony/console/descriptor/descriptor.rs
@@ -0,0 +1,119 @@
+use crate::symfony::console::application::Application;
+use crate::symfony::console::command::command::Command;
+use crate::symfony::console::descriptor::descriptor_interface::DescriptorInterface;
+use crate::symfony::console::exception::invalid_argument_exception::InvalidArgumentException;
+use crate::symfony::console::input::input_argument::InputArgument;
+use crate::symfony::console::input::input_definition::InputDefinition;
+use crate::symfony::console::input::input_option::InputOption;
+use crate::symfony::console::output::output_interface::OutputInterface;
+use indexmap::IndexMap;
+use shirabe_php_shim::PhpMixed;
+
+/// @internal
+pub trait Descriptor: DescriptorInterface {
+    fn output(&self) -> std::rc::Rc<std::cell::RefCell<dyn OutputInterface>>;
+
+    fn set_output(&mut self, output: std::rc::Rc<std::cell::RefCell<dyn OutputInterface>>);
+
+    fn describe(
+        &mut self,
+        output: std::rc::Rc<std::cell::RefCell<dyn OutputInterface>>,
+        object: PhpMixed,
+        options: IndexMap<String, PhpMixed>,
+    ) -> anyhow::Result<()> {
+        self.set_output(output);
+
+        // PHP dispatches via `$object instanceof ...`. The concrete runtime type of
+        // `object` must be recovered to route to the correct describe* method.
+        match true {
+            // case $object instanceof InputArgument:
+            _ if todo!("$object instanceof InputArgument") => {
+                let argument: InputArgument = todo!("downcast object to InputArgument");
+                self.describe_input_argument(&argument, options)?;
+            }
+            // case $object instanceof InputOption:
+            _ if todo!("$object instanceof InputOption") => {
+                let option: InputOption = todo!("downcast object to InputOption");
+                self.describe_input_option(&option, options)?;
+            }
+            // case $object instanceof InputDefinition:
+            _ if todo!("$object instanceof InputDefinition") => {
+                let definition: InputDefinition = todo!("downcast object to InputDefinition");
+                self.describe_input_definition(&definition, options)?;
+            }
+            // case $object instanceof Command:
+            _ if todo!("$object instanceof Command") => {
+                let mut command: Box<dyn Command> = todo!("downcast object to Command");
+                self.describe_command(command.as_mut(), options)?;
+            }
+            // case $object instanceof Application:
+            _ if todo!("$object instanceof Application") => {
+                let application: std::rc::Rc<std::cell::RefCell<Application>> =
+                    todo!("downcast object to Application");
+                self.describe_application(application, options)?;
+            }
+            _ => {
+                return Err(
+                    InvalidArgumentException(shirabe_php_shim::InvalidArgumentException {
+                        message: format!(
+                            "Object of type \"{}\" is not describable.",
+                            shirabe_php_shim::get_debug_type(&object)
+                        ),
+                        code: 0,
+                    })
+                    .into(),
+                );
+            }
+        }
+
+        Ok(())
+    }
+
+    /// Writes content to output.
+    fn write(&self, content: &str, decorated: bool) {
+        self.output().borrow().write(
+            &[content.to_string()],
+            false,
+            if decorated {
+                crate::symfony::console::output::output_interface::OUTPUT_NORMAL
+            } else {
+                crate::symfony::console::output::output_interface::OUTPUT_RAW
+            },
+        );
+    }
+
+    /// Describes an InputArgument instance.
+    fn describe_input_argument(
+        &mut self,
+        argument: &InputArgument,
+        options: IndexMap<String, PhpMixed>,
+    ) -> anyhow::Result<()>;
+
+    /// Describes an InputOption instance.
+    fn describe_input_option(
+        &mut self,
+        option: &InputOption,
+        options: IndexMap<String, PhpMixed>,
+    ) -> anyhow::Result<()>;
+
+    /// Describes an InputDefinition instance.
+    fn describe_input_definition(
+        &mut self,
+        definition: &InputDefinition,
+        options: IndexMap<String, PhpMixed>,
+    ) -> anyhow::Result<()>;
+
+    /// Describes a Command instance.
+    fn describe_command(
+        &mut self,
+        command: &mut dyn Command,
+        options: IndexMap<String, PhpMixed>,
+    ) -> anyhow::Result<()>;
+
+    /// Describes an Application instance.
+    fn describe_application(
+        &mut self,
+        application: std::rc::Rc<std::cell::RefCell<Application>>,
+        options: IndexMap<String, PhpMixed>,
+    ) -> anyhow::Result<()>;
+}