add get_headers_for_node

crates/runtime/src/dialogue.rs

@@ -3,6 +3,7 @@
 use crate::markup::{DialogueTextProcessor, LineParser, MarkupParseError};
 use crate::prelude::*;
 use log::error;
+use std::collections::HashMap;
 use std::fmt::Debug;
 use thiserror::Error;
 use yarnspinner_core::prelude::*;
@@ -312,6 +313,22 @@ impl Dialogue {
             .map(|node| node.tags)
     }
 
+    /// Returns the headers for the node `node_name`.
+    ///
+    /// The headers are all the key-value pairs defined in the node's source code
+    /// including the `tags` and `title` headers.
+    ///
+    /// Returns [`None`] if the node is not present in the program.
+    #[must_use]
+    pub fn get_headers_for_node(&self, node_name: &str) -> Option<HashMap<String, String>> {
+        self.get_node_logging_errors(node_name).map(|node| {
+            node.headers
+                .iter()
+                .map(|header| (header.key.clone(), header.value.clone()))
+                .collect()
+        })
+    }
+
     /// Gets a value indicating whether a specified node exists in the [`Program`].
     #[must_use]
     pub fn node_exists(&self, node_name: &str) -> bool {

crates/yarnspinner/tests/dialogue_tests.rs

@@ -3,6 +3,7 @@
 //! ## Implementation notes
 //! `TestDumpingCode` was not ported because `GetByteCode` is not used by a user directly and thus was not implemented at all.
 
+use std::collections::HashMap;
 use test_base::prelude::*;
 use yarnspinner::compiler::*;
 use yarnspinner::runtime::*;
@@ -162,6 +163,27 @@ fn test_getting_tags() {
     assert_eq!(tags, vec!["rawText"]);
 }
 
+#[test]
+fn test_getting_headers() {
+    let path = test_data_path().join("Example.yarn");
+    let mut test_base = TestBase::new();
+
+    let result = Compiler::new().read_file(path).compile().unwrap();
+
+    test_base = test_base.with_program(result.program.unwrap());
+    let dialogue = &test_base.dialogue;
+
+    let headers = dialogue.get_headers_for_node("LearnMore").unwrap();
+
+    let mut expected_headers = HashMap::new();
+    expected_headers.insert("title".to_string(), "LearnMore".to_string());
+    expected_headers.insert("tags".to_string(), "rawText".to_string());
+    expected_headers.insert("colorID".to_string(), "0".to_string());
+    expected_headers.insert("position".to_string(), "763,472".to_string());
+
+    assert_eq!(headers, expected_headers);
+}
+
 /// ## Implementation note
 /// Corresponds to `TestPrepareForLine`
 #[test]