2022-04-06 21:43:03 +00:00
|
|
|
[<< previous](14-middleware.md) | [next >>](16-data-repository.md)
|
2022-04-05 17:09:40 +00:00
|
|
|
|
|
|
|
|
### Adding Content
|
|
|
|
|
|
2022-05-31 16:05:46 +00:00
|
|
|
By now we did not really display anything but some examples to in our application, and it is now time to make our app
|
2022-04-05 17:09:40 +00:00
|
|
|
display some content. For example we could our app be able to display the Markdown files used in this tutorial as
|
|
|
|
|
nicely rendered HTML Pages that can be viewed in the browser instead of the editor you are using.
|
|
|
|
|
|
|
|
|
|
So lets start by copying the markdown files to our app directory. I have created a new folder 'data/pages' and placed all
|
|
|
|
|
the markdown files in there.
|
|
|
|
|
|
|
|
|
|
Next we need a markdown parser, a pretty simple one is [Parsedown](https://parsedown.org/), if you want more features
|
|
|
|
|
you could also use the [Commonmark parser](https://commonmark.thephpleague.com/). I will choose Parsedown here, but you
|
|
|
|
|
can use whatever you like.
|
|
|
|
|
|
|
|
|
|
After installing Parsedown lets write a Markdownparser interface and an implementation using parsedown.
|
|
|
|
|
|
2022-05-31 16:05:46 +00:00
|
|
|
We only need one function that receives a string of Markdown and returns the HTML representation (as a string as well).
|
2022-04-05 17:09:40 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
```php
|
|
|
|
|
<?php declare(strict_types=1);
|
|
|
|
|
|
|
|
|
|
namespace Lubian\NoFramework\Template;
|
|
|
|
|
|
|
|
|
|
interface MarkdownParser
|
|
|
|
|
{
|
|
|
|
|
public function parse(string $markdown): string;
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
2022-05-31 16:05:46 +00:00
|
|
|
By the namespace you will already have guessed that I placed in interface in a file calles MarkdownParser.php in
|
|
|
|
|
the src/Template folder. Let's put our Parsedown implementation right next to it in a file called ParsedownParser.php
|
2022-04-05 17:09:40 +00:00
|
|
|
|
|
|
|
|
```php
|
|
|
|
|
<?php declare(strict_types=1);
|
|
|
|
|
|
|
|
|
|
namespace Lubian\NoFramework\Template;
|
|
|
|
|
|
|
|
|
|
use Parsedown;
|
|
|
|
|
|
|
|
|
|
final class ParsedownRenderer implements MarkdownParser
|
|
|
|
|
{
|
|
|
|
|
public function __construct(private Parsedown $parser)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public function parse(string $markdown): string
|
|
|
|
|
{
|
|
|
|
|
return $this->parser->parse($markdown);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
We could now use the ParsedownRender class directly in our actions by typehinting the classname as an argument to the
|
|
|
|
|
constructor or a method, but as we always want to rely on an interface instead of an implementation we need to define
|
2022-05-31 16:05:46 +00:00
|
|
|
the ParsedownRenderer as the correct implementation for the MarkdownRenderer interface in the dependencies file:
|
2022-04-05 17:09:40 +00:00
|
|
|
|
|
|
|
|
```php
|
|
|
|
|
...
|
|
|
|
|
\Lubian\NoFramework\Template\MarkdownParser::class => fn(\Lubian\NoFramework\Template\ParsedownParser $p) => $p,
|
|
|
|
|
...
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
You can test that in our "Other.php" action and try out if the Parser works and is able to render Markdown to HTML:
|
|
|
|
|
|
|
|
|
|
```php
|
|
|
|
|
public function someFunctionName(ResponseInterface $response, MarkdownParser $parser): ResponseInterface
|
|
|
|
|
{
|
|
|
|
|
$html = $parser->parse('This *works* **too!**');
|
|
|
|
|
$response->getBody()->write($html);
|
|
|
|
|
return $response->withStatus(200);
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
But we want to display complete Pages written in Markdown, it would also be neat to be able to display a list of all
|
|
|
|
|
available pages. For that we need a few things:
|
|
|
|
|
|
|
|
|
|
Firstly we need two new Templates, one for the list of the Pages, and the second one for displaying a single pages
|
|
|
|
|
content. Create a new folder in `templates/page` with to files:
|
|
|
|
|
|
|
|
|
|
`templates/page/list.html`
|
|
|
|
|
```html
|
|
|
|
|
<!DOCTYPE html>
|
|
|
|
|
<html lang="en">
|
|
|
|
|
<head>
|
|
|
|
|
<meta charset="UTF-8">
|
|
|
|
|
<title>Pages</title>
|
|
|
|
|
<link rel="stylesheet" href="https://unpkg.com/@picocss/pico@latest/css/pico.classless.min.css">
|
|
|
|
|
</head>
|
|
|
|
|
<body>
|
|
|
|
|
<main>
|
|
|
|
|
<ul>
|
|
|
|
|
{{#pages}}
|
|
|
|
|
<li>
|
|
|
|
|
<a href="/page/{{title}}">{{id}}: {{title}}</a>
|
|
|
|
|
</li>
|
|
|
|
|
{{/pages}}
|
|
|
|
|
</ul>
|
|
|
|
|
</main>
|
|
|
|
|
</body>
|
|
|
|
|
</html>
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
This template iterates over a provided array of pages, each element consists of the two properties: an id and a title,
|
|
|
|
|
those are simply displayed using an unordered list.
|
|
|
|
|
|
|
|
|
|
`templates/page/show.html`
|
|
|
|
|
```html
|
|
|
|
|
<!DOCTYPE html>
|
|
|
|
|
<html lang="en">
|
|
|
|
|
<head>
|
|
|
|
|
<meta charset="UTF-8">
|
|
|
|
|
<title>{{title}}</title>
|
|
|
|
|
<link rel="stylesheet" href="https://unpkg.com/@picocss/pico@latest/css/pico.classless.min.css">
|
2022-04-05 23:21:17 +00:00
|
|
|
<link rel="stylesheet"
|
|
|
|
|
href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.5.0/styles/default.min.css">
|
|
|
|
|
<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.5.0/highlight.min.js"></script>
|
|
|
|
|
<script>hljs.highlightAll();</script>
|
2022-04-05 17:09:40 +00:00
|
|
|
</head>
|
|
|
|
|
<body>
|
|
|
|
|
<main>
|
|
|
|
|
{{{content}}}
|
|
|
|
|
</main>
|
|
|
|
|
</body>
|
|
|
|
|
</html>
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
The second templates displays a single rendered markdown page. As data it expects the title and the content as array.
|
|
|
|
|
I used an extra bracket for the content ```{{{content}}}``` so that the Mustache-Renderer does not escape the provided
|
2022-05-31 16:05:46 +00:00
|
|
|
html and thereby destroys the parsed markdown.
|
2022-04-05 17:09:40 +00:00
|
|
|
|
|
|
|
|
You might have spotted that I added [Pico.css](https://picocss.com/) which is just a very small css framework to make the
|
2022-05-31 16:05:46 +00:00
|
|
|
pages a little nicer to look at. It mostly provides some typography styles that work great with rendered Markdown,
|
2022-04-05 23:21:17 +00:00
|
|
|
but you can leave that out or use any other css framework you like. There is also some Javascript that adds syntax
|
|
|
|
|
highlighting to the code.
|
2022-04-05 17:09:40 +00:00
|
|
|
|
|
|
|
|
After you have taken care of the templating side we can now create an new Action class with two methods to display use
|
|
|
|
|
our markdown files and the templates to create the pages. As we have two templates I propose to use Two methods in our
|
|
|
|
|
Action:
|
|
|
|
|
`src/Action/Page.php`
|
|
|
|
|
```php
|
|
|
|
|
function show(string $name): \Psr\Http\Message\ResponseInterface;
|
|
|
|
|
function list(): \Psr\Http\Message\ResponseInterface;
|
|
|
|
|
```
|
|
|
|
|
|
2022-05-31 16:05:46 +00:00
|
|
|
Let's define two routes. `/page` should display the overview of all pages, and if the add the name of chapter to the
|
2022-04-05 17:09:40 +00:00
|
|
|
route, `/page/adding-content` for example, the show action should be called with the name as a variable:
|
|
|
|
|
|
|
|
|
|
`config/routes.php`
|
|
|
|
|
```php
|
|
|
|
|
$r->addRoute('GET', '/page', [Page::class, 'list']);
|
|
|
|
|
$r->addRoute('GET', '/page/{page}', [Page::class, 'show']);
|
|
|
|
|
```
|
|
|
|
|
|
2022-05-31 16:05:46 +00:00
|
|
|
Here is my Implementation. I have added a little regex replacement in the show method that replaces the links to the
|
2022-04-05 17:09:40 +00:00
|
|
|
next and previous chapter so that it works with our routing configuration.
|
|
|
|
|
|
|
|
|
|
`src/Action/Page.php`
|
|
|
|
|
```php
|
|
|
|
|
<?php declare(strict_types=1);
|
|
|
|
|
|
|
|
|
|
namespace Lubian\NoFramework\Action;
|
|
|
|
|
|
|
|
|
|
use Lubian\NoFramework\Exception\InternalServerError;
|
|
|
|
|
use Lubian\NoFramework\Template\MarkdownParser;
|
|
|
|
|
use Lubian\NoFramework\Template\Renderer;
|
|
|
|
|
use Psr\Http\Message\ResponseInterface;
|
|
|
|
|
|
|
|
|
|
use function array_filter;
|
|
|
|
|
use function array_map;
|
|
|
|
|
use function array_values;
|
|
|
|
|
use function file_get_contents;
|
|
|
|
|
use function glob;
|
|
|
|
|
use function preg_replace;
|
|
|
|
|
use function str_contains;
|
|
|
|
|
use function str_replace;
|
|
|
|
|
use function substr;
|
|
|
|
|
|
|
|
|
|
class Page
|
|
|
|
|
{
|
|
|
|
|
public function __construct(
|
|
|
|
|
private ResponseInterface $response,
|
|
|
|
|
private MarkdownParser $parser,
|
|
|
|
|
private Renderer $renderer,
|
|
|
|
|
private string $pagesPath = __DIR__ . '/../../data/pages/'
|
|
|
|
|
) {
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public function show(
|
|
|
|
|
string $page,
|
|
|
|
|
): ResponseInterface {
|
|
|
|
|
$page = array_values(
|
|
|
|
|
array_filter(
|
|
|
|
|
$this->getPages(),
|
|
|
|
|
fn (string $filename) => str_contains($filename, $page)
|
|
|
|
|
)
|
|
|
|
|
)[0];
|
|
|
|
|
$markdown = file_get_contents($page);
|
|
|
|
|
|
|
|
|
|
// fix the next and previous buttons to work with our routing
|
|
|
|
|
$markdown = preg_replace('/\(\d\d-/m', '(', $markdown);
|
|
|
|
|
$markdown = str_replace('.md)', ')', $markdown);
|
|
|
|
|
|
|
|
|
|
$page = str_replace([$this->pagesPath, '.md'], ['', ''], $page);
|
|
|
|
|
$data = [
|
|
|
|
|
'title' => substr($page, 3),
|
|
|
|
|
'content' => $this->parser->parse($markdown),
|
|
|
|
|
];
|
|
|
|
|
$html = $this->renderer->render('page/show', $data);
|
|
|
|
|
$this->response->getBody()->write($html);
|
|
|
|
|
return $this->response;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public function list(): ResponseInterface
|
|
|
|
|
{
|
|
|
|
|
$pages = array_map(function (string $page) {
|
|
|
|
|
$page = str_replace([$this->pagesPath, '.md'], ['', ''], $page);
|
|
|
|
|
return [
|
|
|
|
|
'id' => substr($page, 0, 2),
|
|
|
|
|
'title' => substr($page, 3),
|
|
|
|
|
];
|
|
|
|
|
}, $this->getPages());
|
|
|
|
|
$html = $this->renderer->render('page/list', ['pages' => $pages]);
|
|
|
|
|
$this->response->getBody()->write($html);
|
|
|
|
|
return $this->response;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* @return string[]
|
|
|
|
|
*/
|
|
|
|
|
private function getPages(): array
|
|
|
|
|
{
|
|
|
|
|
$files = glob($this->pagesPath . '*.md');
|
|
|
|
|
if ($files === false) {
|
|
|
|
|
throw new InternalServerError('cannot read pages');
|
|
|
|
|
}
|
|
|
|
|
return $files;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
2022-04-25 13:19:41 +00:00
|
|
|
You can now navigate your Browser to [localhost:1235/page][http://localhost:1235/page] and try out if everything works.
|
2022-04-05 17:09:40 +00:00
|
|
|
|
|
|
|
|
Of course this code is far from looking good. We heavily rely on the pages being files in the filesystem, and the action
|
2022-05-31 16:05:46 +00:00
|
|
|
should never be aware of the filesystem in the first place, also we have a lot of string replacements and other repetitive
|
|
|
|
|
code in the file. And phpstan is going to scream at us a lot, but if we rewrite the code to satisfy all the checks we would
|
|
|
|
|
add even more lines to that simple class, so lets move on to the next chapter where we move all the logic to separate
|
2022-04-05 17:09:40 +00:00
|
|
|
classes following our holy SOLID principles :)
|
|
|
|
|
|
|
|
|
|
|
2022-04-06 21:43:03 +00:00
|
|
|
[<< previous](14-middleware.md) | [next >>](16-data-repository.md)
|
