saving steel script into the database

server/src/steel/handlers.rs

@@ -0,0 +1,4 @@
+// src/steel/handlers.rs
+pub mod evaluator;
+
+pub use evaluator::{validate_script, validate_target_column};

server/src/steel/handlers/evaluator.rs

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+// src/steel/handlers/evaluator.rs
+use serde_json::Value;
+
+const SYSTEM_COLUMNS: &[&str] = &["id", "deleted", "firma", "created_at"];
+
+// Column validation
+pub fn validate_target_column(
+    table_name: &str,
+    target: &str,
+    table_columns: &Value,
+) -> Result<(), String> {
+    if SYSTEM_COLUMNS.contains(&target) {
+        return Err(format!("Cannot override system column: {}", target));
+    }
+
+    let columns: Vec<String> = serde_json::from_value(table_columns.clone())
+        .map_err(|e| format!("Invalid column data: {}", e))?;
+
+    if !columns.iter().any(|c| c == target) {
+        return Err(format!("Target column {} not defined in table {}", target, table_name));
+    }
+
+    Ok(())
+}
+
+// Basic script validation
+pub fn validate_script(script: &str) -> Result<(), String> {
+    if script.trim().is_empty() {
+        return Err("Script cannot be empty".to_string());
+    }
+    Ok(())
+}

server/src/steel/mod.rs

@@ -0,0 +1,3 @@
+// src/steel/mod.rs
+
+pub mod handlers;