admin-tools: add method to delete duplicatesdelete-duplicates

1 files changed, 31 insertions, 0 deletions

diff --git a/src/admin-tools.js b/src/admin-tools.js
index b3135b1..858ec6d 100644
--- a/src/admin-tools.js
+++ b/src/admin-tools.js
@@ -111,6 +111,36 @@ async function findAllDuplicates() {
 	}
 }
 
+async function deleteAllDuplicates() {
+	output("loading courses ...");
+	const courses = await fetchCourses("SOL Graduierung");
+	output(`searching in ${courses.length} courses ... `);
+	const promises = [];
+	for (const course of courses) {
+		promises.push(findDuplicates(course));
+	}
+
+	const allDuplicates = await Promise.all(promises);
+
+	const deletePromises = [];
+	for (const [course, courseDuplicates] of allDuplicates) {
+		const toDelete = [];
+		for (const duplicates of courseDuplicates) {
+			for (let i = duplicates.length - 1; i > 0; i--) {
+				toDelete.push(duplicates[i].changeId);
+			}
+		}
+		output(`${course.title}: Deleting ${toDelete}`);
+		deletePromises.push(
+			(async function () {
+				const dbActivity = await course.getActivity("Graduation");
+				const db = new DB(dbActivity.id);
+				await db.deleteEntries(toDelete);
+			})(),
+		);
+	}
+}
+
 async function exportGraduations(course) {
 	const dbActivity = await course.getActivity("Graduation");
 	const db = new DB(dbActivity.id);
@@ -151,6 +181,7 @@ async function init() {
 		output(JSON.stringify(students.map((s) => s.id)));
 	});
 	document.getElementById("find-duplicates").addEventListener("click", findAllDuplicates);
+	document.getElementById("delete-duplicates").addEventListener("click", deleteAllDuplicates);
 	document.getElementById("export-graduation-dbs").addEventListener("click", exportAllGraduations);
 }