124 lines
3.9 KiB
Dart
124 lines
3.9 KiB
Dart
import 'package:angel3_framework/angel3_framework.dart';
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import 'package:belatuk_code_buffer/belatuk_code_buffer.dart';
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import 'package:file/file.dart';
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import 'package:jael3/jael3.dart';
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import 'package:jael3_preprocessor/jael3_preprocessor.dart';
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import 'package:belatuk_symbol_table/belatuk_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, set minified to true
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///
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/// For custom HTML formating, you need to override the [createBuffer] parameter
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/// with a function that returns a new instance of [CodeBuffer].
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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 = '.jael',
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bool strictResolution = false,
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bool cacheViews = true,
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Map<String, Document>? cache,
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Iterable<Patcher> patch = const [],
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bool asDSX = false,
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bool minified = true,
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CodeBuffer Function()? createBuffer}) {
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var _cache = cache ?? <String, Document>{};
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var bufferFunc = createBuffer ?? () => CodeBuffer();
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if (minified) {
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bufferFunc = () => CodeBuffer(space: '', newline: '');
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}
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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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//var stopwatch = Stopwatch()..start();
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if (cacheViews && _cache.containsKey(name)) {
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processed = _cache[name];
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} else {
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processed = await _loadViewTemplate(viewsDirectory, name,
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fileExtension: fileExtension, asDSX: asDSX, patch: patch);
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if (cacheViews) {
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_cache[name] = processed!;
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}
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}
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//print('Time executed: ${stopwatch.elapsed.inMilliseconds}');
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//stopwatch.stop();
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var buf = bufferFunc();
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var scope = SymbolTable(
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values: locals?.keys.fold<Map<String, dynamic>>(<String, dynamic>{},
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(out, k) => out..[k.toString()] = locals[k]) ??
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<String, dynamic>{});
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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);
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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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/// Preload all of Jael templates into a cache
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///
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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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Future<void> jaelTemplatePreload(
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Directory viewsDirectory, Map<String, Document> cache,
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{String fileExtension = '.jael',
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bool asDSX = false,
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Iterable<Patcher> patch = const []}) async {
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await viewsDirectory.list(recursive: true).forEach((f) async {
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if (f.basename.endsWith(fileExtension)) {
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var name = f.basename.split(".");
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if (name.length > 1) {
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//print("View: ${name[0]}");
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Document? processed = await _loadViewTemplate(viewsDirectory, name[0]);
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if (processed != null) {
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cache[name[0]] = processed;
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}
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}
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}
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});
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}
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Future<Document?> _loadViewTemplate(Directory viewsDirectory, String name,
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{String fileExtension = '.jael',
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bool asDSX = false,
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Iterable<Patcher> patch = const []}) async {
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var errors = <JaelError>[];
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Document? processed;
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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, onError: errors.add);
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if (doc == null) {
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throw ArgumentError(file.basename + " does not exists");
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}
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try {
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processed =
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await (resolve(doc, viewsDirectory, patch: patch, onError: errors.add));
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} catch (e) {
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// Ignore these errors, so that we can show syntax errors.
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}
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if (processed == null) {
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throw ArgumentError(file.basename + " does not exists");
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}
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return processed;
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}
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