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// 模拟数据存储
class MockStorage {
constructor() {
this.storageKey = "oj_mock_data";
this.initData();
}
initData() {
if (!localStorage.getItem(this.storageKey)) {
const initialData = {
problems: [
{
id: 1,
title: "两数之和",
label: "数组,哈希表,简单",
testPointNum: 3,
description:
"给定一个整数数组 nums 和一个目标值 target，请你在该数组中找出和为目标值的那两个整数，并返回它们的数组下标。\n\n你可以假设每种输入只会对应一个答案。但是，数组中同一个元素不能使用两遍。",
testPointList: [
{ input: "3\n2 7 11 15\n9", output: "0 1", isSample: 1 },
{ input: "2\n3 2 4\n6", output: "1 2", isSample: 0 },
{ input: "2\n3 3\n6", output: "0 1", isSample: 0 },
],
createTime: "2024-01-15 10:00:00",
},
{
id: 2,
title: "验证回文串",
label: "字符串,双指针,简单",
testPointNum: 6,
description:
"给定一个字符串，验证它是否是回文串，只考虑字母和数字字符，可以忽略字母的大小写。\n\n说明：本题中，我们将空字符串定义为有效的回文串。",
testPointList: [
{
input: '"A man, a plan, a canal: Panama"',
output: "true",
isSample: 1,
},
{ input: '"race a car"', output: "false", isSample: 1 },
{ input: '""', output: "true", isSample: 0 },
],
createTime: "2024-01-16 14:30:00",
},
],
nextProblemId: 3,
};
this.saveData(initialData);
}
}
getData() {
return JSON.parse(localStorage.getItem(this.storageKey)) || {};
}
saveData(data) {
localStorage.setItem(this.storageKey, JSON.stringify(data));
}
// 获取所有题目
getProblems() {
return this.getData().problems || [];
}
// 添加题目
addProblem(problem) {
const data = this.getData();
const newProblem = {
...problem,
id: data.nextProblemId++,
createTime: new Date().toLocaleString("zh-CN"),
};
data.problems.push(newProblem);
this.saveData(data);
return newProblem;
}
// 更新题目
updateProblem(updatedProblem) {
const data = this.getData();
const index = data.problems.findIndex((p) => p.id === updatedProblem.id);
if (index !== -1) {
data.problems[index] = {
...data.problems[index],
...updatedProblem,
// 保留创建时间
createTime: data.problems[index].createTime,
};
this.saveData(data);
return data.problems[index];
}
return null;
}
// 删除题目
deleteProblem(id) {
const data = this.getData();
data.problems = data.problems.filter((p) => p.id !== id);
this.saveData(data);
return true;
}
// 分页查询
getProblemsByPage(pageNum = 1, size = 10) {
const problems = this.getProblems();
const start = (pageNum - 1) * size;
const end = start + size;
const pageData = problems.slice(start, end);
return {
records: pageData,
total: problems.length,
pageNum,
size,
};
}
// 根据ID查询
getProblemById(id) {
const problems = this.getProblems();
return problems.find((p) => p.id === Number(id));
}
}
// 创建单例实例
export const mockStorage = new MockStorage();
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