Parsing dates?

[basememara]

I'm guessing you left out dates because it would open up a can of worms. I added an extension that works, but is inconsistent with the rest of the API's:

extension JSON {
    public subscript(index: String, dateFormat dateFormat: String) -> NSDate? {
        let formatter = NSDateFormatter()
        formatter.dateFormat = dateFormat

        if let value = self[index].string,
            let date = formatter.dateFromString(value) {
                return date
        }

        return nil
    }
}

Then you use it like this:

date = json["date", dateFormat: "yyyy-MM-dd'T'HH:mm:ss"]

Any thoughts or suggestions on adding support for dates?

[basememara]

I took another pass at it that's more consistent and cleaner:

extension JSON {

    /// The value as a date or nil if not present/convertible
    public var dateValue: NSDate? { return dateValue("yyyy-MM-dd'T'HH:mm:ss") }

    /**
        The value as a date or nil if not present/convertible.
        - parameter dateFormat: A string for formatting the date.
        - returns: A new instance of date or nil if its object cannot be formatted.
    */
    public func dateValue(dateFormat: String) -> NSDate? {
        let formatter = NSDateFormatter()
        formatter.dateFormat = dateFormat

        return dateValue(formatter)
    }

    /**
        The value as a date or nil if not present/convertible.
        - parameter dateFormat: A date formmatter for converting the date.
        - returns: A new instance of date or nil if its object cannot be formatted.
    */
    public func dateValue(dateFormatter: NSDateFormatter) -> NSDate? {
        guard let value = string,
            let date = dateFormatter.dateFromString(value)
                else { return nil }

        return date
    }
}

Now you can use it like this:

json["date1"].dateValue
json["date2"].dateValue("dd-MM-yyyy")

let formatter = NSDateFormatter()
formatter.dateFormat = "MMMM dd, yyyy"
json["date3"].dateValue(formatter)

I created a PR #16, let me know what you think 😁

[delba]

Discussion in #16