Pass a JSON string/object as args to a sub routine

Is there any way to pass in a JSON string as an argument to a subroutine like this:

> + Do Something
> - <call>doSomething {action:"print", path:"/one/two"}</call>
> 

I tried a few ways to parse the args as a JSON object and pass it onto another function but I have been unable to get a JSON object that mirrors the JSON string as passed to the subroutine from the rivescript. Is there another approach I can take to accomplish the same?

[ssc2015]

@kirsle, I will be happy to help with the implementation of this new feature! We can further simplify the JSON schema where “object” key specifies the subroutine to be called and “params” contains an arbitrary key/value pairs as follows:

+ do something
- <call>{ "object": "doSomething", "params": {"action":"print", "path": "/one/two" } }</call>

Please let me know your thoughts on how I can contribute.

Regarding the workaround, I am not sure if it can handle concurrency since the uservar (tmp) could change between multiple invocation of the same trigger by the same user and could potentially run into one invocation getting the args of another invocation, right?

[ssc2015]

I have been playing around and tried the following:

• Passed in a JSON style string using single quotes & parenthesis (see below for an example)
• The arg parser passed along the args string pretty much as is except one thing: it added an extra comma wherever it found a comma in the original string
• In my subroutine, I simply replaced single quotes with double quotes, ‘(’ with ‘{’, ‘)’ with ‘}’, and double commas with a single comma.
• Then I was able to parse the JSON string!

Here is one of the snippets I have tried.

! version = 2.0

+ json test * *
- <call>doSomething ('params':('props':('prop1':'val1', 'level2':('prop2':'<star1>', 'prop3':'<star2>'))))</call>

> object doSomething javascript
  var args2 = args.join('');
  args2 = args2.replace(/'/g, '"');
  args2 = args2.replace(/\(/g, '{');
  args2 = args2.replace(/\)/g, '}');
  args2 = args2.replace(/,,/g, ',');
  var json = JSON.parse(args2);
  return JSON.stringify(json);

< object

This approach does not require a major change and continues to keep the <call>tag sane and simple! What do you think?