platform/packages/markdown/README.md

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# Angel3 Markdown
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![Pub Version (including pre-releases)](https://img.shields.io/pub/v/angel3_markdown?include_prereleases)
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[![Null Safety](https://img.shields.io/badge/null-safety-brightgreen)](https://dart.dev/null-safety)
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[![Discord](https://img.shields.io/discord/1060322353214660698)](https://discord.gg/3X6bxTUdCM)
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[![License](https://img.shields.io/github/license/dart-backend/angel)](https://github.com/dart-backend/angel/tree/master/packages/markdown/LICENSE)
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Markdown view generator for Angel3.
With this plug-in, you can easily serve static sites without doing more than writing simple Markdown. Thus, it is a friendly choice for writing API documentation or other tedious HTML-writing tasks.
## Installation
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In your `pubspec.yaml`:
```yaml
dependencies:
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angel3_framework: ^8.0.0
angel3_markdown: ^8.0.0
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```
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## Usage
It's very straightforward to configure an Angel server to use Markdown. Keep in mind to use `package:file` instead of `dart:io`:
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```dart
configureServer(Angel app) async {
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var fs = LocalFileSystem();
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await app.configure(markdown(
// The directory where your views are located.
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fs.directory('views'),
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));
}
```
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You can then generate HTML on-the-fly in a request handler. Assuming your view directory contained a file named `hello.md`, the following would render it as an HTML response:
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```dart
configureServer(Angel app) async {
app.get('/hello', (res) => res.render('hello'));
}
```
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`package:angel3_markdown` by default searches for files with a `.md` extension; however,
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you can easily override this.
## Interpolation
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`angel3_markdown` can interpolate the values of data from `locals` before building the Markdown. For example, with the following template `species.md`:
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```markdown
# Species: {{species.name}}
The species *{{species.genus.name}} {{species.name}}* is fascinating...
```
You can render as follows:
```dart
requestHandler(ResponseContext res) {
return res.render('species', {
'species': new Species('sapiens', genius: 'homo')
});
}
```
To disable interpolation for a single bracket, prefix it with an `@`, ex: `@{{raw | not_interpolated | angular}}`.
## Templates
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Markdown is frequently used to build the *content* of sites, but not the templates.
You might want to wrap the content of pages in a custom template to apply pretty
CSS and JS, etc:
```dart
configureServer(Angel app) async {
await app.configure(
markdown(
// The directory where your views are located.
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fs.directory('views'), template: (content, Map locals) {
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return '''<!DOCTYPE html>
<html>
<head>
<title>${locals['title']} - My Site</title>
</head>
<body>
$content
</body>
</html>
''';
}),
);
}
```
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The `template` function will have access to whatever values were passed to the renderer, or an empty `Map`.
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## Enhancing Markdown
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You can pass an `extensionSet` to add additional features to the Markdown renderer. By default, this plug-in configures it to enable Github-flavored Markdown.