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'use strict'
const { buildSchemas } = require('./schemas')
/**
* Called at every fastify context that is being created.
* @param {object} parentSchemaCtrl: the SchemaController instance of the Fastify parent context
* @param {object} opts: the `schemaController` server option. It can be undefined when a parentSchemaCtrl is set
* @return {object}:a new SchemaController
*/
function buildSchemaController (parentSchemaCtrl, opts) {
if (parentSchemaCtrl) {
return new SchemaController(parentSchemaCtrl, opts)
}
const compilersFactory = Object.assign({
buildValidator: null,
buildSerializer: null
}, opts?.compilersFactory)
if (!compilersFactory.buildValidator) {
const ValidatorSelector = require('@fastify/ajv-compiler')
compilersFactory.buildValidator = ValidatorSelector()
}
if (!compilersFactory.buildSerializer) {
const SerializerSelector = require('@fastify/fast-json-stringify-compiler')
compilersFactory.buildSerializer = SerializerSelector()
}
const option = {
bucket: (opts && opts.bucket) || buildSchemas,
compilersFactory,
isCustomValidatorCompiler: typeof opts?.compilersFactory?.buildValidator === 'function',
isCustomSerializerCompiler: typeof opts?.compilersFactory?.buildValidator === 'function'
}
return new SchemaController(undefined, option)
}
class SchemaController {
constructor (parent, options) {
this.opts = options || parent?.opts
this.addedSchemas = false
this.compilersFactory = this.opts.compilersFactory
if (parent) {
this.schemaBucket = this.opts.bucket(parent.getSchemas())
this.validatorCompiler = parent.getValidatorCompiler()
this.serializerCompiler = parent.getSerializerCompiler()
this.isCustomValidatorCompiler = parent.isCustomValidatorCompiler
this.isCustomSerializerCompiler = parent.isCustomSerializerCompiler
this.parent = parent
} else {
this.schemaBucket = this.opts.bucket()
this.isCustomValidatorCompiler = this.opts.isCustomValidatorCompiler || false
this.isCustomSerializerCompiler = this.opts.isCustomSerializerCompiler || false
}
}
// Bucket interface
add (schema) {
this.addedSchemas = true
return this.schemaBucket.add(schema)
}
getSchema (schemaId) {
return this.schemaBucket.getSchema(schemaId)
}
getSchemas () {
return this.schemaBucket.getSchemas()
}
setValidatorCompiler (validatorCompiler) {
// Set up as if the fixed validator compiler had been provided
// by a custom 'options.compilersFactory.buildValidator' that
// always returns the same compiler object. This is required because:
//
// - setValidatorCompiler must immediately install a compiler to preserve
// legacy behavior
// - setupValidator will recreate compilers from builders in some
// circumstances, so we have to install this adapter to make it
// behave the same if the legacy API is used
//
// The cloning of the compilersFactory object is necessary because
// we are aliasing the parent compilersFactory if none was provided
// to us (see constructor.)
this.compilersFactory = Object.assign(
{},
this.compilersFactory,
{ buildValidator: () => validatorCompiler })
this.validatorCompiler = validatorCompiler
this.isCustomValidatorCompiler = true
}
setSerializerCompiler (serializerCompiler) {
// Set up as if the fixed serializer compiler had been provided
// by a custom 'options.compilersFactory.buildSerializer' that
// always returns the same compiler object. This is required because:
//
// - setSerializerCompiler must immediately install a compiler to preserve
// legacy behavior
// - setupSerializer will recreate compilers from builders in some
// circumstances, so we have to install this adapter to make it
// behave the same if the legacy API is used
//
// The cloning of the compilersFactory object is necessary because
// we are aliasing the parent compilersFactory if none was provided
// to us (see constructor.)
this.compilersFactory = Object.assign(
{},
this.compilersFactory,
{ buildSerializer: () => serializerCompiler })
this.serializerCompiler = serializerCompiler
this.isCustomSerializerCompiler = true
}
getValidatorCompiler () {
return this.validatorCompiler || (this.parent && this.parent.getValidatorCompiler())
}
getSerializerCompiler () {
return this.serializerCompiler || (this.parent && this.parent.getSerializerCompiler())
}
getSerializerBuilder () {
return this.compilersFactory.buildSerializer || (this.parent && this.parent.getSerializerBuilder())
}
getValidatorBuilder () {
return this.compilersFactory.buildValidator || (this.parent && this.parent.getValidatorBuilder())
}
/**
* This method will be called when a validator must be setup.
* Do not setup the compiler more than once
* @param {object} serverOptions the fastify server options
*/
setupValidator (serverOptions) {
const isReady = this.validatorCompiler !== undefined && !this.addedSchemas
if (isReady) {
return
}
this.validatorCompiler = this.getValidatorBuilder()(this.schemaBucket.getSchemas(), serverOptions.ajv)
}
/**
* This method will be called when a serializer must be setup.
* Do not setup the compiler more than once
* @param {object} serverOptions the fastify server options
*/
setupSerializer (serverOptions) {
const isReady = this.serializerCompiler !== undefined && !this.addedSchemas
if (isReady) {
return
}
this.serializerCompiler = this.getSerializerBuilder()(this.schemaBucket.getSchemas(), serverOptions.serializerOpts)
}
}
SchemaController.buildSchemaController = buildSchemaController
module.exports = SchemaController