[Feature] support dates

The general idea is to support the usage of date variables passed in as strings with some form of operator/type specifier to identify them as dates. The primary goal is to support comparison operators.

Example: {“<”:[{“date”: “2016-10-01T03:24:00.000Z”}, {“date”: “2016-10-15T03:24:00.000Z”}]}

Prototype:

"date" : function(a) {
        return(new Date(a));
    }

Example with var - works with date function in place: rule: {“<”:[{“date”:{“var”:“submitDate”}}, {“date”:{“var”: “dueDate”}}]} data: {“submitDate”:“2016-10-01T03:24:00.000Z”,“dueDate”:“2016-10-15T03:24:00.000Z”}

[jwadhams]

I still need to write some documentation, but I added the method jsonLogic.add_operation yesterday and I think it can solve this case. Here’s an example where string comparison does the wrong thing for two ISO 8601 dates (one Zulu time, the other Pacific time) and then using Date.parse to compare them correctly.

jsonLogic.add_operation('Date', Date);

jsonLogic.apply(
  {"<":[
    "2016-10-01T03:24:00.000Z",
    "2016-10-01T03:24:00.000-0800"
  ]}
); //false

jsonLogic.apply(
  {"<":[
    {"Date.parse" : "2016-10-01T03:24:00.000Z"},
    {"Date.parse" : "2016-10-01T03:24:00.000-0800"}
  ]}
); //true

And of course it works with vars too:

jsonLogic.add_operation('Date', Date);

var data = {
  gmt : "2016-10-01T03:24:00.000Z",
  pst : "2016-10-01T03:24:00.000-0800"
};

jsonLogic.apply(
  {"<":[
    {"var":"gmt"},
    {"var":"pst"}
  ]},
  data
);//false

jsonLogic.apply(
  {"<":[
    {"Date.parse" : {"var":"gmt"} },
    {"Date.parse" : {"var":"pst"} }
  ]},
  data
); //true

And it’s user’s choice whether they want to use the built-in Date or they need something heavier duty like moment.js.

Does this do what you need it to?

[robmurtha]

That should work thanks!

On 28 October 2016 at 12:17, Jeremy Wadhams [e-mail] wrote:

BTW, by “yesterday” I mean “v1.0.9” which was on Bower yesterday but didn’t go up on NPM until this morning.

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