68 lines
2.2 KiB
Dart
68 lines
2.2 KiB
Dart
import 'package:angel_framework/angel_framework.dart';
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import 'package:code_buffer/code_buffer.dart';
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import 'package:file/file.dart';
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import 'package:jael/jael.dart';
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import 'package:jael_preprocessor/jael_preprocessor.dart';
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import 'package:symbol_table/symbol_table.dart';
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/// Configures an Angel server to use Jael to render templates.
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///
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/// To enable "minified" output, you need to override the [createBuffer] function,
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/// to instantiate a [CodeBuffer] that emits no spaces or line breaks.
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///
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/// To apply additional transforms to parsed documents, provide a set of [patch] functions.
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AngelConfigurer jael(Directory viewsDirectory,
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{String fileExtension,
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bool strictResolution: false,
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bool cacheViews: false,
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Iterable<Patcher> patch,
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bool asDSX: false,
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CodeBuffer createBuffer()}) {
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var cache = <String, Document>{};
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fileExtension ??= '.jl';
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createBuffer ??= () => new CodeBuffer();
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return (Angel app) async {
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app.viewGenerator = (String name, [Map locals]) async {
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var errors = <JaelError>[];
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Document processed;
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if (cacheViews == true && cache.containsKey(name)) {
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processed = cache[name];
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} else {
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var file = viewsDirectory.childFile(name + fileExtension);
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var contents = await file.readAsString();
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var doc = parseDocument(contents,
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sourceUrl: file.uri, asDSX: asDSX == true, onError: errors.add);
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processed = doc;
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try {
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processed = await resolve(doc, viewsDirectory,
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patch: patch, onError: errors.add);
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} catch (_) {
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// Ignore these errors, so that we can show syntax errors.
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}
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if (cacheViews == true) {
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cache[name] = processed;
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}
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}
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var buf = createBuffer();
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var scope = new SymbolTable(values: locals ?? {});
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if (errors.isEmpty) {
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try {
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const Renderer().render(processed, buf, scope,
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strictResolution: strictResolution == true);
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return buf.toString();
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} on JaelError catch (e) {
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errors.add(e);
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}
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}
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Renderer.errorDocument(errors, buf..clear());
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return buf.toString();
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};
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};
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}
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