# Content-Generator

Content-Generator is a module to handle different contents in a mongo-db.

### Connection to MongoDB

This module use the [mongodb-handler](https://www.npmjs.com/package/mongodb-handler) as sub-modul. To connect mongo-db please set follow ENV variables:

- MDBHANDLER_CONSTRING: Defines the connectionstring to the database. Default is: 'mongodb://localhost:27017/mdbtest';

The module will store and handle all templates in collection ```CM_Templates```. You can define your own Collection-Name with follow ENV Variable:

- CTM_COLLECTION: Defines the name of the collection

### Template Engine

This module use the great template engine where powered by mozilla.

You find the API Description [here](https://mozilla.github.io/nunjucks/templating.html)

### PDF generator

- HTML_PDF_OPTIONS: Defines the options for HTML-PDF

### Usage Templatemanagement

#### Global Properties

This Template Manager is based in combination with the variables ```key``` and ```lang```. All variables free to declare as string.

- key: Defines the global key of a template
- lang: Defines the language in combination to the key properties.

#### Create a template

To Create a new template use the function ```createTemplate```:

```
const ctg = require('content-generator');

const obj = { html: '<div>Test</div>', lang: 'en_GB', subject: 'Test', key: 'TESTTEMPLATE' };

ctg.createTemplate(obj, (err) => {
  if (err) {
    throw err;
  }
});
```

#### Update a template

To update a template use the funciton ```updateTemplate```:

```
const ctg = require('content-generator');

const obj = { html: '<div>Test</div>', lang: 'en_GB', subject: 'Test', key: 'TESTTEMPLATE' };

ctg.updateTemplate(obj, (err) => {
  if (err) {
    throw err;
  }
});
```

#### Delete a template

To delete a template use the function ```deleteTemplate```:

```
const ctg = require('content-generator');

const obj = { lang: 'en_GB', key: 'TESTTEMPLATE' };

ctg.deleteTemplate(obj, (err) => {
  if (err) {
    throw err;
  }
});
```

#### Get a template

To get a template use the function ```getTemplate```:

```
const ctg = require('content-generator');

const obj = { lang: 'en_GB', key: 'TESTTEMPLATE' };

ctg.getTemplate(obj, (err, template) => {
  if (err) {
    throw err;
  }

  console.log(template);
});
```

#### Get a Templateslist by key

To get a templatelist by key use the function ```getTemplatesByKey```:

```
const ctg = require('content-generator');

ctg.getTemplate('TESTTEMPLATE', (err, templates) => {
  if (err) {
    throw err;
  }

  console.log(templates);
});
```

#### Get all templates from system

To get all templates from the system use the function ```getTemplatesList```:

```
const ctg = require('content-generator');

ctg.getTemplatesList((err, templates) => {
  if (err) {
    throw err;
  }

  console.log(templates);
});
```

### Usage Content Generator

#### Generate a html Content

This module will merge the variables from a JSON Object into the html-content:

JSON:
```
{
  name: {
    firstname: "Martin",
    lastname: "Wiesmüller"
  },
  address: {
    line1: "Werbas Innotec GmbH",
    line2: "Max-Eyth-Str. 42, 71088 Holzgerlingen"
  }
}
```

HTML:
```
<div>Name: {{ name.firstname }}</div>
<div>Lastname: {{ name.lastname }}</div>
<br>
<div>Adressline 1: {{ address.line1 }}</div>
<div>Adressline 2: {{ address.line2 }}</div>
```

TO =>

```
<div>Name: Martin</div>
<div>Lastname: Wiesmüller</div>
<br>
<div>Adressline 1: Werbas Innotec GmbH"</div>
<div>Adressline 2: Max-Eyth-Str. 42, 71088 Holzgerlingen</div>

```

Usage in Syntax:

```
const ctg = require('content-generator');

ctg.generateHtml(json, 'TESTTEMPLATE', 'en_GB', (err, res) => {
  if (err) {
    throw err;
  }

  // Output the html Content
  console.log(res.html);

  // Output the content as plain text
  console.log(res.plain);
});
```

#### Generate a PDF stream

To generate a PDF Stream use the function ```generatePdf```:

```
const ctg = require('content-generator');

ctg.generatePdf(json, 'TESTTEMPLATE', 'en_GB', (err, res) => {
  if (err) {
    throw err;
  }

  // Output the html Content
  console.log(res.html);

  // Output the content as plain text
  console.log(res.plain);

  // Output the content as pdf stream
  res.stream.pipe(fs.createWriteStream('./foo.pdf'));
});
```