allow laws with no headers

src/config.rs

@@ -101,22 +101,27 @@ impl Config {
         let config: Config = toml::from_str(&config_str)?;
 
         let mut builder = law::Builder::new(config.law.name);
-        for classifier in &config.law.classifiers {
-            let to_add = law::Classifier::new(
-                &classifier.name,
-                create_classifier(&classifier.match_function)?,
-            );
-            if classifier.is_root {
-                builder.add_classifier(to_add.root());
-            } else {
-                builder.add_classifier(to_add);
+        if let Some(classifiers) = config.law.classifiers {
+            for classifier in &classifiers {
+                let to_add = law::Classifier::new(
+                    &classifier.name,
+                    create_classifier(&classifier.match_function)?,
+                );
+                if classifier.is_root {
+                    builder.add_classifier(to_add.root());
+                } else {
+                    builder.add_classifier(to_add);
+                }
             }
+            event!(
+                Level::INFO,
+                "Added {} classifiers from config",
+                &classifiers.len()
+            );
+        } else {
+            builder.no_headers();
+            event!(Level::INFO, "Assuming law text does not contain headers");
         }
-        event!(
-            Level::INFO,
-            "Added {} classifiers from config",
-            &config.law.classifiers.len()
-        );
 
         let mut parser = Parser::new();
 
@@ -153,7 +158,7 @@ impl Config {
 struct Law {
     id: usize,
     name: String,
-    classifiers: Vec<Classifier>,
+    classifiers: Option<Vec<Classifier>>,
 }
 
 #[derive(Debug, Deserialize)]

src/law/mod.rs

@@ -183,6 +183,8 @@ impl From<ClassifierInstance> for Vec<HeadingContent> {
 pub struct Builder {
     name: String,
 
+    no_headers: bool,
+
     /// Structure of the law text
     classifiers: Vec<Classifier>,
 
@@ -225,11 +227,19 @@ impl Builder {
             next_para_header: None,
             last_instance: None,
             next_para_note: None,
+            no_headers: false,
             #[cfg(test)]
             history: Vec::new(),
         }
     }
 
+    pub fn no_headers(&mut self) {
+        self.classifiers
+            .push(Classifier::new("", Arc::new(responsible::contains)));
+        self.new_header("");
+        self.no_headers = true;
+    }
+
     pub fn add_classifier(&mut self, classifier: Classifier) {
         self.classifiers.push(classifier);
     }
@@ -312,6 +322,10 @@ impl Builder {
     /// );
     /// ```
     pub fn new_header(&mut self, name: &str) {
+        if self.no_headers {
+            panic!("Set no_headers, but received header {name}");
+        }
+
         let name = name.trim();
         #[cfg(test)]
         self.history.push(format!("New_header: {name}"));