convert a lot of js to typescript and use a single graduation DB

1 files changed, 43 insertions, 0 deletions

diff --git a/src/graduation-prod.ts b/src/graduation-prod.ts
new file mode 100644
index 0000000..975fd0f
--- /dev/null
+++ b/src/graduation-prod.ts
@@ -0,0 +1,43 @@
+import { getGraduationDb } from "./database-ENV.ts"
+import { Graduation, GraduationChange } from "./graduation-common.ts";
+import type { Student } from "./student-common.ts";
+
+const _graduationChangesPromise = async function() {
+	const db = await getGraduationDb();
+	let changes = new Map();
+	let entries = await db.fetchEntries();
+	for (const e of entries) {
+		const gradChange = GraduationChange.fromDBEntry(e);
+		const studentChanges = changes.get(gradChange.studentId);
+		if (studentChanges === null) {
+			changes.set(gradChange.studentId, [gradChange]);
+		} else {
+			studentChanges.push(gradChange);
+		}
+	}
+	return changes;
+}();
+
+const graduations: Map<number, Graduation> = new Map();
+
+export async function fetchGraduation(student: Student): Promise<Graduation> {
+	if (!graduations.has(student.id)) {
+		const studentChanges = (await _graduationChangesPromise).get(student.id) ?? [];
+		const graduation = Graduation.from(student, studentChanges);
+		graduations.set(student.id, graduation);
+		return graduation;
+	}
+	return graduations.get(student.id)!;
+}
+
+export {
+	LEVEL_NAMES,
+	GraduationChange,
+	Graduation,
+	submitGraduationChange,
+	submitObservation,
+
+	OBSERVATION_TYPES,
+	Observation,
+	ObservationPeriod,
+} from "./graduation-common.ts";