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The simplest service strictifier ever
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import Joi from 'joi'; | |
import _ from 'lodash'; | |
import { | |
BadRequestError | |
} from './errors'; | |
const _promisedValidate = (msg, schema) => { | |
return new Promise((resolve, reject) => { | |
Joi.validate(msg, schema, { | |
stripUnknown: true | |
}, (err, value) => { | |
if (err) { | |
reject(new BadRequestError(err.details[0].message, err.details[0].path)); | |
} else { | |
resolve(value); | |
} | |
}); | |
}); | |
}; | |
const optsSchema = Joi.object().keys({ | |
reqSchema: Joi.object().required(), | |
resSchema: Joi.object().required(), | |
handler: Joi.func().required() | |
}); | |
export default (opts) => { | |
const result = Joi.validate(opts, optsSchema); | |
if (result.error) { | |
throw error; | |
} | |
const o = result.value; | |
return (req, res, next) => { | |
const reqContent = _.extend({}, req.body, req.query, req.params); | |
const ctx = {req, res}; | |
_promisedValidate(reqContent, o.reqSchema) | |
.then((reqMsg) => { | |
return o.handler(reqMsg, ctx); | |
}) | |
.then((resMsg) => { | |
return _promisedValidate(resMsg, o.resSchema); | |
}) | |
.then((data) => { | |
res.json(data); | |
}) | |
.catch((err) => { | |
next(err); | |
}); | |
}; | |
}; |
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