Support for view raw text

[sirenkovladd]

Prerequisites

• [X] I have written a descriptive issue title
• [X] I have searched existing issues to ensure the feature has not already been requested

🚀 Feature Proposal

Call reply.view with raw text or a callback function

• [X] I will do this issue myself

Motivation

Projects can use precompiled templates

Projects can use a generated template that can be received from an external source, you can avoid saving the template to a file

Example

fastify.get('/', async (req, reply) => {
    const rawTemplate = await someRequestOrQuery(req)
    const someData = await getSomeData(req)
    reply.view({ raw: rawTemplate }, someData)
})

fastify.get('/', async (req, reply) => {
    const rawTemplate = await prepareHbsTemplate(req)
    const template = hbs.template(rawTemplate) // typeof template === 'function'
    const someData = await getSomeData(req)
    reply.view(template, someData, { layout: someLayout })
})