From e1f3eca2b5f50a4ff9c65309f5f2dd1d568f432c Mon Sep 17 00:00:00 2001
From: Christian Simon <simon@swine.de>
Date: Sat, 15 May 2021 17:39:50 +0000
Subject: [PATCH] feat(evaluator): adds std.parseJson builtin method


---
--- a/crates/jrsonnet-evaluator/src/builtin/mod.rs
+++ b/crates/jrsonnet-evaluator/src/builtin/mod.rs
@@ -1,8 +1,8 @@
 use crate::{
 	equals,
 	error::{Error::*, Result},
-	parse_args, primitive_equals, push, throw, with_state, ArrValue, Context, FuncVal, LazyVal,
-	Val,
+	parse_args, primitive_equals, push, throw, with_state, ArrValue, Context, EvaluationState,
+	FuncVal, LazyVal, Val,
 };
 use format::{format_arr, format_obj};
 use jrsonnet_interner::IStr;
@@ -74,6 +74,7 @@
 			("reverse".into(), builtin_reverse),
 			("id".into(), builtin_id),
 			("strReplace".into(), builtin_str_replace),
+			("parseJson".into(), builtin_parse_json),
 		].iter().cloned().collect()
 	};
 }
@@ -164,6 +165,20 @@
 	})
 }
 
+fn builtin_parse_json(
+	context: Context,
+	_loc: Option<&ExprLocation>,
+	args: &ArgsDesc,
+) -> Result<Val> {
+	parse_args!(context, "parseJson", args, 1, [
+		0, s: ty!(string) => Val::Str;
+	], {
+		let state = EvaluationState::default();
+		let path = Rc::new(PathBuf::from("std.parseJson"));
+		state.evaluate_snippet_raw(path ,s)
+	})
+}
+
 // faster
 fn builtin_slice(context: Context, _loc: Option<&ExprLocation>, args: &ArgsDesc) -> Result<Val> {
 	parse_args!(context, "slice", args, 4, [
--- a/crates/jrsonnet-evaluator/src/lib.rs
+++ b/crates/jrsonnet-evaluator/src/lib.rs
@@ -802,6 +802,21 @@
 	}
 
 	#[test]
+	fn parse_json() {
+		assert_json!(
+			r#"std.parseJson('{"a": -1,"b": 1,"c": 3.141,"d": []}')"#,
+			r#"{"a": -1,"b": 1,"c": 3.141,"d": []}"#
+		);
+		// TODO: this should in fact fail as is no proper JSON syntax
+		assert_json!(
+			r#"std.parseJson("{a:-1, b:1, c:3.141, d:[]}")"#,
+			r#"{"a": -1,"b": 1,"c": 3.141,"d": []}"#
+		);
+		// TODO: this is also no valid JSON
+		assert_json!(r#"std.parseJson('local x = 2; x * x')"#, r#"4"#);
+	}
+
+	#[test]
 	fn test() {
 		assert_json!(
 			r#"[[a, b] for a in [1,2,3] for b in [4,5,6]]"#,

-- 
gitstuff