1 files changed, 57 insertions, 0 deletions
diff --git a/crates/shirabe-external-packages/src/symfony/console/question/confirmation_question.rs b/crates/shirabe-external-packages/src/symfony/console/question/confirmation_question.rs
new file mode 100644
index 0000000..838ec45
--- /dev/null
+++ b/crates/shirabe-external-packages/src/symfony/console/question/confirmation_question.rs
@@ -0,0 +1,57 @@
+use crate::symfony::console::question::Question;
+use shirabe_php_shim::PhpMixed;
+
+/// Represents a yes/no question.
+#[derive(Debug)]
+pub struct ConfirmationQuestion {
+    inner: Question,
+    true_answer_regex: String,
+}
+
+impl ConfirmationQuestion {
+    /// `$question` The question to ask to the user.
+    /// `$default` The default answer to return, true or false.
+    /// `$trueAnswerRegex` A regex to match the "yes" answer.
+    pub fn new(question: String, default: bool, true_answer_regex: String) -> Self {
+        let mut this = Self {
+            inner: Question::new(question, Some(PhpMixed::Bool(default))),
+            true_answer_regex,
+        };
+
+        let normalizer = this.get_default_normalizer();
+        this.inner.set_normalizer(normalizer);
+
+        this
+    }
+
+    /// Returns the default answer normalizer.
+    fn get_default_normalizer(&self) -> Box<dyn Fn(PhpMixed) -> PhpMixed> {
+        let default = self.inner.get_default();
+        let regex = self.true_answer_regex.clone();
+
+        Box::new(move |answer: PhpMixed| {
+            if let PhpMixed::Bool(_) = answer {
+                return answer;
+            }
+
+            let answer_is_true = {
+                let mut matches: Vec<Option<String>> = Vec::new();
+                shirabe_php_shim::preg_match(
+                    &regex,
+                    &shirabe_php_shim::strval(&answer),
+                    &mut matches,
+                ) != 0
+            };
+
+            // false === $default
+            if matches!(default, PhpMixed::Bool(false)) {
+                // $answer && $answerIsTrue
+                return PhpMixed::Bool(!shirabe_php_shim::empty(&answer) && answer_is_true);
+            }
+
+            // '' === $answer || $answerIsTrue
+            let answer_is_empty_string = matches!(&answer, PhpMixed::String(s) if s.is_empty());
+            PhpMixed::Bool(answer_is_empty_string || answer_is_true)
+        })
+    }
+}