added helper functions to reduce bloat

src/corporate/helpers.rs

@@ -80,4 +80,51 @@ pub fn random_range(min: u64, max: u64) -> u64 {
 pub fn choose_random<T: Clone>(items: &[T]) -> T {
     let mut rng = StdRng::from_rng(&mut rand::rng());
     items.choose(&mut rng).unwrap().clone()
+}
+
+/// Extract first valid Yahoo ticker from company
+pub fn extract_first_yahoo_ticker(company: &CompanyCrossPlatformInfo) -> Option<String> {
+    for tickers in company.isin_tickers_map.values() {
+        for ticker in tickers {
+            if ticker.starts_with("YAHOO:") 
+                && ticker != "YAHOO:NO_RESULTS" 
+                && ticker != "YAHOO:ERROR" 
+            {
+                return Some(ticker.trim_start_matches("YAHOO:").to_string());
+            }
+        }
+    }
+    None
+}
+
+/// Sanitize company name for file system use
+pub fn sanitize_company_name(name: &str) -> String {
+    name.replace("/", "_")
+        .replace("\\", "_")
+        .replace(":", "_")
+        .replace("*", "_")
+        .replace("?", "_")
+        .replace("\"", "_")
+        .replace("<", "_")
+        .replace(">", "_")
+        .replace("|", "_")
+}
+
+/// Load companies from JSONL file
+pub async fn load_companies_from_jsonl(
+    path: &std::path::Path
+) -> anyhow::Result<Vec<CompanyCrossPlatformInfo>> {
+    let content = tokio::fs::read_to_string(path).await?;
+    let mut companies = Vec::new();
+    
+    for line in content.lines() {
+        if line.trim().is_empty() {
+            continue;
+        }
+        if let Ok(company) = serde_json::from_str::<CompanyCrossPlatformInfo>(line) {
+            companies.push(company);
+        }
+    }
+    
+    Ok(companies)
 }