refactor: isolate last activity fetch path

2 files changed, 72 insertions, 1 deletions

diff --git a/src/lib/Data/AniList/lastActivity.ts b/src/lib/Data/AniList/lastActivity.ts
new file mode 100644
index 00000000..49daa8fd
--- /dev/null
+++ b/src/lib/Data/AniList/lastActivity.ts
@@ -0,0 +1,71 @@
+import type { AniListAuthorisation, UserIdentity } from "./identity";
+
+interface ActivityHistoryOptions {
+	stats: {
+		activityHistory: {
+			date: number;
+		}[];
+	};
+	options: {
+		timezone: string;
+	};
+}
+
+interface LastActivity {
+	date: Date;
+	timezone: string;
+}
+
+const convertToTimezoneOffset = (timeStr: string) => {
+	const [hours, minutes] = timeStr.split(":");
+	let totalMinutes = parseInt(hours, 10) * 60 + parseInt(minutes, 10);
+
+	totalMinutes = -totalMinutes;
+
+	return totalMinutes;
+};
+
+const activityHistoryOptions = async (
+	userIdentity: UserIdentity,
+	authorisation: AniListAuthorisation,
+): Promise<ActivityHistoryOptions> =>
+	(
+		await (
+			await fetch("https://graphql.anilist.co", {
+				method: "POST",
+				headers: {
+					"Content-Type": "application/json",
+					Accept: "application/json",
+					Authorization: `${authorisation.tokenType} ${authorisation.accessToken}`,
+				},
+				body: JSON.stringify({
+					query: `{ User(id: ${userIdentity.id}) {
+					stats { activityHistory { date } }
+					options { timezone }
+        } }`,
+				}),
+			})
+		).json()
+	).data.User;
+
+export const lastActivityDate = async (
+	userIdentity: UserIdentity,
+	authorisation: AniListAuthorisation,
+): Promise<LastActivity> => {
+	if (userIdentity.id === -1 || userIdentity.id === -2)
+		return { date: new Date(8640000000000000), timezone: "" };
+
+	const history = await activityHistoryOptions(userIdentity, authorisation);
+	const date = new Date(
+		Number(
+			history.stats.activityHistory[history.stats.activityHistory.length - 1]
+				.date,
+		) *
+			1000 +
+			convertToTimezoneOffset(history.options.timezone),
+	);
+
+	date.setDate(date.getDate() + 1);
+
+	return { date, timezone: history.options.timezone };
+};
diff --git a/src/lib/Home/LastActivity.svelte b/src/lib/Home/LastActivity.svelte
index 39b35198..4ade371a 100644
--- a/src/lib/Home/LastActivity.svelte
+++ b/src/lib/Home/LastActivity.svelte
@@ -2,7 +2,7 @@
 import userIdentity from "$stores/identity";
 import { onMount } from "svelte";
 import type { AniListAuthorisation } from "$lib/Data/AniList/identity";
-import { lastActivityDate } from "../Data/AniList/activity";
+import { lastActivityDate } from "../Data/AniList/lastActivity";
 import settings from "$stores/settings";
 
 let { user }: { user: AniListAuthorisation } = $props();