92 lines
2.8 KiB
Dart
92 lines
2.8 KiB
Dart
import 'dart:convert';
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import 'package:html/parser.dart' as html;
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import '../../domain/exam_schedule.dart';
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class SchoolExamAdapter {
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static ExamSchedule extract(String content) {
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try {
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if (utf8.encode(content).length > 2 * 1024 * 1024) {
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throw const FormatException();
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}
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final document = html.parse(content);
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final selected = document.querySelector('#xqbh option[selected]');
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final term = selected?.attributes['value'];
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final table = document.querySelector('#sample-table-1');
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const headers = [
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'id',
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'序号',
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'学号',
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'姓名',
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'课程代码',
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'课程名称',
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'考核方式',
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'考生编号',
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'考场顺序号',
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'考场',
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'座位号',
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'考试时间',
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];
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if (selected == null ||
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term == null ||
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table == null ||
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!RegExp(r'^\d+$').hasMatch(term)) {
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throw const FormatException();
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}
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final rows = table.querySelectorAll('tr');
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if (rows.isEmpty || rows.first.children.length != headers.length) {
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throw const FormatException();
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}
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for (var i = 0; i < headers.length; i++) {
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if (rows.first.children[i].text.trim() != headers[i]) {
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throw const FormatException();
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}
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}
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final records = <ExamRecord>[];
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var explicitlyEmpty = false;
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for (final row in rows.skip(1)) {
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// DataTables can insert a single explicit no-data placeholder.
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if (row.children.length == 1 &&
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row.children.first.attributes['colspan'] == '12' &&
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const [
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'没有数据',
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'暂无数据',
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'无数据',
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'No data available in table',
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].contains(row.text.trim())) {
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explicitlyEmpty = true;
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continue;
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}
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if (row.children.length != 12 ||
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row.querySelector('script,style') != null) {
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throw const FormatException();
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}
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final cells = row.children.map((c) => c.text.trim()).toList();
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records.add(
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ExamRecord(
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code: cells[4],
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name: cells[5],
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assessment: cells[6],
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candidate: cells[7],
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sequence: cells[8],
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room: cells[9],
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seat: cells[10],
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time: cells[11],
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),
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);
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}
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if (records.isEmpty && !explicitlyEmpty) throw const FormatException();
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return ExamSchedule.fromJson(
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ExamSchedule(
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semesterLabel: selected.text.trim(),
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termId: term,
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records: records,
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).toJson(),
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);
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} catch (_) {
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throw const FormatException('未识别到完整的考试查询表，已有考试信息保持不变。');
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}
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}
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}
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