1 files changed, 97 insertions, 0 deletions
diff --git a/crates/shirabe-symfony-console/src/descriptor/descriptor.rs b/crates/shirabe-symfony-console/src/descriptor/descriptor.rs
new file mode 100644
index 00000000..f3647d7c
--- /dev/null
+++ b/crates/shirabe-symfony-console/src/descriptor/descriptor.rs
@@ -0,0 +1,97 @@
+//! ref: composer/vendor/symfony/console/Descriptor/Descriptor.php
+
+use crate::application::Application;
+use crate::command::command::Command;
+use crate::descriptor::descriptor_interface::{DescribableObject, DescriptorInterface};
+use crate::input::input_argument::InputArgument;
+use crate::input::input_definition::InputDefinition;
+use crate::input::input_option::InputOption;
+use crate::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: DescribableObject,
+        options: IndexMap<String, PhpMixed>,
+    ) -> anyhow::Result<()> {
+        self.set_output(output);
+
+        // PHP dispatches via `$object instanceof ...`; the explicit `DescribableObject` enum makes
+        // that dispatch a `match`.
+        match object {
+            DescribableObject::InputArgument(argument) => {
+                self.describe_input_argument(&argument, options)?;
+            }
+            DescribableObject::InputOption(option) => {
+                self.describe_input_option(&option, options)?;
+            }
+            DescribableObject::InputDefinition(definition) => {
+                self.describe_input_definition(&definition, options)?;
+            }
+            DescribableObject::Command(command) => {
+                self.describe_command(&*command.borrow(), options)?;
+            }
+            DescribableObject::Application(application) => {
+                self.describe_application(application, options)?;
+            }
+        }
+
+        Ok(())
+    }
+
+    /// Writes content to output.
+    fn write(&self, content: &str, decorated: bool) {
+        self.output().borrow().write(
+            &[content.to_string()],
+            false,
+            if decorated {
+                crate::output::output_interface::OUTPUT_NORMAL
+            } else {
+                crate::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: &dyn Command,
+        options: IndexMap<String, PhpMixed>,
+    ) -> anyhow::Result<()>;
+
+    /// Describes an Application instance.
+    fn describe_application(
+        &mut self,
+        application: std::rc::Rc<std::cell::RefCell<dyn Application>>,
+        options: IndexMap<String, PhpMixed>,
+    ) -> anyhow::Result<()>;
+}