[Forms] [Feature request] prompt function

[xDaizu]

Would it be possible to define rules like this:

email: {
                identifier: 'email',
                rules: [
                    {
                        type: 'empty',
                        prompt: options.messages.email_empty
                    },
                    {
                        type: 'email',
                        prompt: options.messages.email_invalid
                    },
                    {
                        type: 'checkRemoteValidity[email]',
                        prompt: foo
                    }
                ]
            },

where foo is a function called at validation time, which return a string, so when it validates it creates a customized prompt? Picture something like "The email [email protected] is already taken". Currently trying that fails with the error prompt.search is not a function because of the line:

requiresValue = (prompt.search('{value}') !== -1),

so maybe in the previous line:

 prompt = rule.prompt || settings.prompt[ruleName] || settings.text.unspecifiedRule,

we could try calling rule.prompt()? Would that work?

[stale]

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