apeman-app-validate
==========

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apeman app to do schema validation.

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<a name="section-doc-guides-01-installation-md"></a>
Installation
-----

```bash
$ npm install apeman-app-validate --save
```


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Usage
---------

1. Define an app within Apemanfile.js
2. Call the app via apeman app command.

**Apemanfile.js**
```javascript
/** This is an example Apemanfile to use apeman-app-validate */

'use strict'

// Define JSON schema for validation.
const userCreateSchema = {
  properties: {
    account_name: {
      type: 'string',
      minLength: 2
    }
  },
  required: [
    'account_name'
  ]
}

module.exports = {
  $pkg: { /* ... */ },
  $apps: {
    // Define your own app.
    'my-app-01': {
      // Map url and handlers.
      '/': [
        require('apeman-app-json')(),
        require('apeman-app-form')(),
        require('apeman-app-route')({
          '/user': {
            'POST': [
              // Add routing function.
              // Serve error if validation failed.
              require('apeman-app-validate')(userCreateSchema, {
                // Options
              }),
              function doCreateUser (req, res, next) {
                /* ... */
              }
            ]
          }
        })
      ]
    }
  }
}

```

Then,
```bash
$ apeman app my-app-01 -p 3000
```


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<a name="section-doc-guides-03-signature-md"></a>
Signature
-------

#### apemanAppValidate(schema, options) -> function

apeman app to do schema validation.

##### Args

| Name | Type | Default | Description |
| --- | ---- | --- | --- |
| schema | object  |  | A json schema object. |
| options | object  |  | Optional settings. |
| options.format | string  |  | Response format like "json", "xml", etc. |
| options.statusCode | string  | 400 | Status code for error response. |
| options.prefix | string  | ap | Prefix for response header field. |
| options.namespace | string  | data | Name space of data in body. |


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Errors
------

### Error formats

```
errors.<property>.<details>
```

`property` is name property validation failed.
`details` is an array of error descriptions.

### Error Response Example

```json
{
  "errors": {
    "accountName": [
      {
        "reason": "OBJECT_REQUIRED",
        "params": {
          "key": "account_name"
        }
      }
    ],
    "password": [
      {
        "reason": "OBJECT_REQUIRED",
        "params": {
          "key": "password"
        }
      }
    ]
  }
}
```




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License
-------
This software is released under the [MIT License](https://github.com/apeman-app-labo/apeman-app-validate/blob/master/LICENSE).

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Links
------

+ [apeman](https://github.com/apeman-labo/apeman)
+ [apeman-app](https://github.com/apeman-cmd-labo/apeman-app)

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