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

${errors.length} Error(s)

') ..writeln('
    ') ..indent(); for (var error in errors) { var type = error.severity == JaelErrorSeverity.warning ? 'warning' : 'error'; buf ..writeln('
  • ') ..indent() ..writeln( '$type: ${error.span.start.toolString}: ${error.message}') ..writeln('
    ') ..writeln( '' + HTML_ESCAPE .convert(error.span.highlight(color: false)) .replaceAll('\n', '
    ') + '    ', ) ..outdent() ..writeln('
    • '); } buf ..outdent() ..writeln('
') ..writeln('') ..writeln(''); return buf.toString(); }; }; }