README.md
# mini-tools
mini tools for express and others
[](https://npmjs.org/package/mini-tools)
[](https://npmjs.org/package/mini-tools)
[](https://github.com/codenautas/mini-tools/actions?query=workflow%3A%22Node.js+CI%22)
[](https://ci.appveyor.com/project/codenautas/mini-tools)
[](https://coveralls.io/r/codenautas/mini-tools)
[](https://github.com/codenautas/mini-tools/pulls/app%2Fdependabot)
language: 
also available in:
[](LEEME.md)
## Install
```sh
$ npm install mini-tools
```
## Main goal
Have some mini tools for express and others
## API
### serveErr(req, res [, next])
Returns a function that sends a error message to de front-end.
If the error object has setted the property
* code: is displayed before the message
* status: is sended in the header (otherwise "400" is sended)
```js
app.post('/insert' , function(req,res){
//...
if(duplicate){
serveErr(req,res)(new Error("Duplicate name. Can't insert"));
return;
}
//...
```
It is promise friendly
```js
app.use('/tools', function(req,res,next){
//...
.then(function(){
if(not_in_this_middleware){
throw new Error("next");
}
// ...
}).catch(serveErr(req,res,next));
```
*catch* expects a function that receive an error.
*serveErr* returns that function.
When err is Error("next") *serveErr* calls next and does not send any result to de front-end;
otherwise it sends a 400 error with the message and stack.
### serveJade(path, opts)
```js
var express = require('express');
var app = express();
app.use('/',MiniTools.serveJade('./static',true));
app.use('/main',MiniTools.serveJade('./static/index.jade',false));
```
Returns an express middleware to serve jade files.
If *opts* is boolean it will be the *any* option.
If `any==true` it serves files adding .jade to req.path; and
if there is no jade file it call `next()`.
If `any==false` it serves that specific file.
Others options in *opts* are pased to `pug.render` function.
**Note**: for use serveJade you must include `"pug"` in `package.json`
### serveStylus(path, any)
```js
var express = require('express');
var app = express();
app.use('/',MiniTools.serveStylus('./static',true));
app.use('/site.css',MiniTools.serveStylus('./static/index.styl',false));
```
Returns an express middleware to serve jade files.
If `any==true` it serves files adding .jade to req.path; and
if there is no jade file it call `next()`.
If `any==false` it serves that specific file.
**Note**: for use serveStylus you must include stylus in package.json
### serveText(anyText,contentTypeText)
```js
var express = require('express');
var app = express();
app.use('/about',MiniTools.serveText('<h1>This app</h1>','html'));
app.use('/is-up-service',MiniTools.serveText('Yes.'));
```
Returns an express middleware to serve pain text.
Optionaly you can pass "content type".
### serveJson(object)
```js
var express = require('express');
var app = express();
var config = {devel:false, title: "title"};
app.use('/config',MiniTools.serveJson(config));
```
Returns an express middleware to serve an object in JSON format.
### serveYaml(object)
```js
var express = require('express');
var app = express();
var config = {devel:false, title: "title"};
app.use('/config',MiniTools.serveYaml(config));
```
Returns an express middleware to serve an object in yaml format
(using [js-yaml](https:www.npmjs.com/package/js-yaml)).
### readConfig(list, opts)
```js
MiniTools.readConfig(
[
{production: true},
'package.json',
'other-configs.yml',
'more-configs',
],
{whenNotExist:'ignore'}
).then(function(config){
console.log(config);
});
```
Reads the chain of configuration merging with [best-globals.changing](https://www.npmjs.com/package/best-globals#changingoriginalconfig-changes-options).
If the list element is a fileName ending with .json .yaml o .yml, it reads and parse,
if doesn't have extension it search first,
if it is a plain object it uses directly.
**options**
* whenNotExist:'ignore'
* whenNotExist:'fail'
## License
[MIT](LICENSE)