feat: implement RadonOpCodes::MapStringify

Author: guidiaz

rad/src/operators/map.rs

@@ -80,6 +80,14 @@ pub fn values(input: &RadonMap) -> RadonArray {
     let v: Vec<RadonTypes> = input.value().values().cloned().collect();
     RadonArray::from(v)
 }
+pub fn stringify(input: &RadonMap) -> Result<RadonString, RadError> {
+    let json_string = serde_json::to_string(&input.value())
+        .map_err(|_| RadError::Decode { 
+            from: "RadonMap", 
+            to: "RadonString" 
+        })?;
+    Ok(RadonString::from(json_string))
+}
 
 /// This module was introduced for encapsulating the interim legacy logic before WIP-0024 is
 /// introduced, for the sake of maintainability.

rad/src/operators/mod.rs

@@ -84,7 +84,7 @@ pub enum RadonOpCodes {
     FloatTruncate = 0x5D,
     ///////////////////////////////////////////////////////////////////////
     // Map operator codes (start at 0x60)
-    //    MapEntries = 0x60,
+    MapStringify = 0x60,
     MapGetArray = 0x61,
     MapGetBoolean = 0x62,
     MapGetBytes = 0x63,

rad/src/types/map.rs

@@ -161,6 +161,7 @@ impl Operable for RadonMap {
             }
             (RadonOpCodes::MapKeys, None) => Ok(RadonTypes::from(map_operators::keys(self))),
             (RadonOpCodes::MapValues, None) => Ok(RadonTypes::from(map_operators::values(self))),
+            (RadonOpCodes::MapStringify, None) => map_operators::stringify(self).map(RadonTypes::from),
             (op_code, args) => Err(RadError::UnsupportedOperator {
                 input_type: RADON_MAP_TYPE_NAME.to_string(),
                 operator: op_code.to_string(),