resp: Add RList for decoding lists in responses

Author: ohsayan

src/query.rs

@@ -395,18 +395,18 @@ const LIST_SYM_OPEN: u8 = 0x09;
 const LIST_SYM_CLOSE: u8 = ']' as u8;
 
 /// A list type representing a Skyhash list type, used in parameter lists
-pub struct List<'a, T: SQParam> {
+pub struct QList<'a, T: SQParam> {
     l: &'a [T],
 }
 
-impl<'a, T: SQParam> List<'a, T> {
+impl<'a, T: SQParam> QList<'a, T> {
     /// create a new list
     pub fn new(l: &'a [T]) -> Self {
         Self { l }
     }
 }
 
-impl<'a, T: SQParam> SQParam for List<'a, T> {
+impl<'a, T: SQParam> SQParam for QList<'a, T> {
     fn append_param(&self, q: &mut Vec<u8>) -> usize {
         q.push(LIST_SYM_OPEN);
         for param in self.l {
@@ -420,7 +420,7 @@ impl<'a, T: SQParam> SQParam for List<'a, T> {
 #[test]
 fn list_param() {
     let data = vec!["hello", "giant", "world"];
-    let list = List::new(&data);
+    let list = QList::new(&data);
     let q = query!(
         "insert into apps.social(?, ?, ?)",
         "username",

src/response.rs

@@ -405,3 +405,50 @@ impl<T: FromRow> Deref for Rows<T> {
         &self.0
     }
 }
+
+/// A list received from a response
+pub struct RList<T: FromValue = Value>(Vec<T>);
+
+impl<T: FromValue> RList<T> {
+    /// Returns the values of the list
+    pub fn into_values(self) -> Vec<T> {
+        self.0
+    }
+}
+
+impl<T: FromValue> Deref for RList<T> {
+    type Target = [T];
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<T: FromValue> FromValue for RList<T> {
+    fn from_value(v: Value) -> ClientResult<Self> {
+        match v {
+            Value::List(l) => {
+                let mut ret = Vec::new();
+                for value in l {
+                    ret.push(T::from_value(value)?);
+                }
+                Ok(Self(ret))
+            }
+            _ => Err(Error::ParseError(ParseError::TypeMismatch)),
+        }
+    }
+}
+
+#[test]
+fn resp_list_parse() {
+    let response_list = Response::Row(Row::new(vec![
+        Value::String("sayan".to_owned()),
+        Value::List(vec![
+            Value::String("c".to_owned()),
+            Value::String("assembly".to_owned()),
+            Value::String("rust".to_owned()),
+        ]),
+    ]));
+    let (name, languages) = response_list.parse::<(String, RList<String>)>().unwrap();
+    assert_eq!(name, "sayan");
+    assert_eq!(languages.as_ref(), vec!["c", "assembly", "rust"]);
+}