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feat: 支持退选多门替换课程（replaceCodes 字段） #27

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feat: 支持退选多门替换课程（replaceCodes 字段） #27

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16 changes: 14 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -76,7 +76,8 @@ https://www.douyin.com/video/7651581603861720441
### 🤝 换课功能
- **情境**：如果你 pre 课A 但是又想有 课B 保底就想着能不能骑驴找马，在 课A 有空的时候把 课B 退了之后再去抢
- **实现**：这就是换课功能存在的意义，当你输入目标课程的时候下方有一个可选字段 “替换课程” ，那么就会帮你自动监听并实现上面的功能
- **⚠️注意**：由于抢 课A 前需要先把 课B 退了，所以有 课B 退了之后 课A 没空位的风险，一般是对方和你一样用了本脚本
- **多门替换**：替换课程支持填写多个课程号（逗号分隔），脚本会**依次退选**所有替换课程后再抢新课。适合需要同时腾出多个时间段的场景（如退掉两门课才能选上目标课）
- **⚠️注意**：由于抢 课A 前需要先把替换课程全部退了，若退选后目标课已无空位则等待下次机会；任意一门替换课退选失败时本次抢课中止

### ⏰ 定时功能
- **定时开抢** - 设置精确的开抢时间
Expand Down Expand Up @@ -129,7 +130,8 @@ javascript:(function(){var script=document.createElement('script');script.src='
2. 设置优先级（数字越小优先级越高）
3. 可选：设置时间过滤器（如：`星期一,第1-2节`）
4. 可选：设置教师过滤器（如：`叶利群,讲师`）
5. 点击"➕ 添加课程"按钮
5. 可选：设置替换课程（如：`23306047` 或多门 `23306047,23306048`，逗号分隔，选中新课前依次退选）
6. 点击"➕ 添加课程"按钮

**方式二：修改代码配置**

Expand All @@ -147,6 +149,16 @@ const TARGET_COURSES = [
timeFilter: ['星期一', '第1-2节'],
teacherFilter: ['叶利群', '讲师']
},
{
code: '23306048',
priority: 3,
replaceCodes: ['23306047'] // 选上此课前先退选一门
},
{
code: '23306049',
priority: 4,
replaceCodes: ['23306047', '23306050'] // 选上此课前依次退选两门
},
];
```

Expand Down
60 changes: 37 additions & 23 deletions courseGrabber.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1702,24 +1702,36 @@
// 获取课程配置
const courseConfig = TARGET_COURSES.find((c) => c.code === courseCode);

// 如果配置了替换课程，先执行退选
if (courseConfig && courseConfig.replaceCode) {
// 如果配置了替换课程，先执行退选（支持多门）
const _replaceCodes = courseConfig && courseConfig.replaceCodes && courseConfig.replaceCodes.length > 0
? courseConfig.replaceCodes
: null;
if (_replaceCodes) {
const _codesList = _replaceCodes.join(", ");
log(
`🔄 检测到需要替换课程 ${courseConfig.replaceCode}，立即执行退选...`,
`🔄 检测到需要替换课程 ${_codesList}，依次执行退选...`,
"warning",
courseCode,
);
addUILog &&
addUILog(
"warning",
`[${courseCode}] 🔄 发现空位！开始退选 ${courseConfig.replaceCode}`,
`[${courseCode}] 🔄 发现空位！开始退选 ${_codesList}`,
);

// 异步执行退选，然后选课
dropCourse(courseConfig.replaceCode).then((dropSuccess) => {
// 依次退选所有替换课程，全部成功后再选新课
const dropSequentially = (codes) => {
if (codes.length === 0) return Promise.resolve(true);
return dropCourse(codes[0]).then((ok) => {
if (!ok) return Promise.resolve(false);
return dropSequentially(codes.slice(1));
});
};

dropSequentially(_replaceCodes).then((dropSuccess) => {
if (dropSuccess) {
log(
`✅ 退选成功，立即选择新课程 ${courseCode}`,
`✅ 全部退选成功，立即选择新课程 ${courseCode}`,
"success",
courseCode,
);
Expand Down Expand Up @@ -2783,8 +2795,8 @@
<div class="cg-help-text">支持教师姓名或职称，满足任意一个即可</div>

<div class="cg-section-title" style="font-size: 13px; margin-top: 12px; margin-bottom: 8px;"> 替换课程 (可选)</div>
<input type="text" class="cg-input cg-filter-input" id="cg-replace-code" placeholder="要替换的课程号 (例: 23306047)">
<div class="cg-help-text">选中新课程前，先退选此课程（用于换课）</div>
<input type="text" class="cg-input cg-filter-input" id="cg-replace-code" placeholder="要替换的课程号 (例: 23306047,23306048)">
<div class="cg-help-text">多门课用逗号分隔，选中新课前依次退选这些课</div>

<button class="cg-btn cg-btn-secondary cg-btn-small" id="cg-add-course" style="width: 100%; margin-top: 12px;">➕ 添加课程</button>
</div>
Expand Down Expand Up @@ -2918,15 +2930,16 @@
const timeFilterEl = document.getElementById("cg-time-filter");
const teacherFilterEl = document.getElementById("cg-teacher-filter");

const replaceCode = (replaceCodeEl ? replaceCodeEl.value : "").trim();
const replaceCodeInput = (replaceCodeEl ? replaceCodeEl.value : "").trim();
const timeFilterInput = (timeFilterEl ? timeFilterEl.value : "").trim();
const teacherFilterInput = (
teacherFilterEl ? teacherFilterEl.value : ""
).trim();

// 构造最终要推入的课程对象，避免作用域或外部修改影响
const finalCourse = { code: code, priority: priority };
if (replaceCode) finalCourse.replaceCode = replaceCode;
const finalReplaceCodes = safeParseFilterInput(replaceCodeInput);
if (finalReplaceCodes.length > 0) finalCourse.replaceCodes = finalReplaceCodes;

// 使用安全的解析函数处理过滤器输入（避免被篡改的 Array.prototype.filter）
const finalTimeFilter = safeParseFilterInput(timeFilterInput);
Expand All @@ -2952,8 +2965,8 @@
updateCourseList();

let logMsg = `已添加课程: ${code} (优先级: ${priority})`;
if (finalCourse.replaceCode)
logMsg += ` [替换: ${finalCourse.replaceCode}]`;
if (finalCourse.replaceCodes && finalCourse.replaceCodes.length > 0)
logMsg += ` [替换: ${finalCourse.replaceCodes.join(", ")}]`;
if (finalCourse.timeFilter && finalCourse.timeFilter.length > 0) {
logMsg += ` [时间过滤: ${finalCourse.timeFilter.join(", ")}]`;
}
Expand Down Expand Up @@ -3035,13 +3048,13 @@

list.innerHTML = TARGET_COURSES.map((course, index) => {
const hasConfig =
course.replaceCode || course.timeFilter || course.teacherFilter;
(course.replaceCodes && course.replaceCodes.length > 0) || course.timeFilter || course.teacherFilter;

let filterHTML = "";
if (hasConfig) {
filterHTML = '<div class="cg-course-filters">';
if (course.replaceCode) {
filterHTML += `<div class="cg-course-filter-item"><span class="cg-filter-label">🔄 替换:</span><span>${course.replaceCode}</span></div>`;
if (course.replaceCodes && course.replaceCodes.length > 0) {
filterHTML += `<div class="cg-course-filter-item"><span class="cg-filter-label">🔄 替换:</span><span>${course.replaceCodes.join(", ")}</span></div>`;
}
if (course.timeFilter) {
filterHTML += `<div class="cg-course-filter-item"><span class="cg-filter-label">⏰ 时间:</span><span>${course.timeFilter.join(", ")}</span></div>`;
Expand Down Expand Up @@ -3084,12 +3097,12 @@
window.editCourseUI = (index) => {
const course = TARGET_COURSES[index];

const replaceCode = prompt(
`编辑课程 ${course.code} 的替换课程\n\n输入要替换的课程号，留空表示不替换\n例如: 23306047`,
course.replaceCode || "",
const replaceCodeInput = prompt(
`编辑课程 ${course.code} 的替换课程\n\n多门课用逗号分隔，留空表示不替换\n例如: 23306047,23306048`,
course.replaceCodes ? course.replaceCodes.join(",") : "",
);

if (replaceCode === null) return; // 用户取消
if (replaceCodeInput === null) return; // 用户取消

const timeFilter = prompt(
`编辑课程 ${course.code} 的时间过滤器\n\n多个关键词用逗号分隔，留空表示不过滤\n例如: 星期一,第1-2节`,
Expand All @@ -3106,10 +3119,11 @@
if (teacherFilter === null) return; // 用户取消

// 更新课程配置
if (replaceCode.trim()) {
course.replaceCode = replaceCode.trim();
const parsedReplaceCodes = safeParseFilterInput(replaceCodeInput);
if (parsedReplaceCodes.length > 0) {
course.replaceCodes = parsedReplaceCodes;
} else {
delete course.replaceCode;
delete course.replaceCodes;
}

// 使用安全的解析函数处理过滤器输入（避免被篡改的 Array.prototype.filter）
Expand Down