1 files changed, 124 insertions, 0 deletions
diff --git a/code/app/src/services/account-service.ts b/code/app/src/services/account-service.ts
new file mode 100644
index 0000000..b2bb375
--- /dev/null
+++ b/code/app/src/services/account-service.ts
@@ -0,0 +1,124 @@
+import { http_delete_async, http_get_async, http_post_async } from "$utilities/_fetch";
+import { browser } from "$app/environment";
+import { api_base, CookieNames, StorageKeys } from "$configuration";
+import { is_known_problem } from "$models/internal/KnownProblem";
+import { log_debug } from "$utilities/logger";
+import { StoreType, create_writable_persistent } from "$utilities/persistent-store";
+import { get } from "svelte/store";
+import type { Writable } from "svelte/store";
+import { Temporal } from "temporal-polyfill";
+import type {
+    CreateAccountPayload,
+    CreateAccountResponse,
+    DeleteAccountResponse,
+    IAccountService,
+    LoginPayload,
+    LoginResponse,
+    Session,
+    UpdateAccountPayload,
+    UpdateAccountResponse,
+} from "./abstractions/IAccountService";
+
+export class AccountService implements IAccountService {
+    session: Writable<Session> | undefined;
+    private sessionCooldown = 3600;
+
+    constructor() {
+        if (browser) {
+            this.session = create_writable_persistent({
+                name: StorageKeys.session,
+                initialState: {} as Session,
+                options: {
+                    store: StoreType.LOCAL,
+                },
+            });
+            this.refresh_session();
+        } else {
+            this.session = undefined;
+        }
+    }
+
+    static resolve(): IAccountService {
+        return new AccountService();
+    }
+
+    async refresh_session(forceRefresh: boolean = false): Promise<void> {
+        if (!this.session) return;
+        const currentValue = get(this.session);
+        const currentEpoch = Temporal.Now.instant().epochSeconds;
+        if (!forceRefresh && ((currentValue?._lastUpdated ?? 0) + this.sessionCooldown) > currentEpoch) {
+            log_debug("Session is not stale yet", {
+                currentEpoch,
+                staleEpoch: currentValue?._lastUpdated + this.sessionCooldown,
+            });
+            return;
+        }
+        const sessionResponse = await http_get_async(api_base("_/session-data"));
+        if (sessionResponse.ok) {
+            this.session.set(await sessionResponse.json());
+        } else {
+            this.session.set(null);
+        }
+    }
+
+    async end_session_async(callback: Function = undefined): Promise<void> {
+        if (!this.session) return;
+        await this.logout_async();
+        this.session.set(null);
+        if (callback && typeof callback === "function") callback();
+    }
+
+    async login_async(payload: LoginPayload): Promise<LoginResponse> {
+        const response = await http_post_async(api_base("_/account/login"), payload);
+        if (response.ok) return { isLoggedIn: true };
+        if (is_known_problem(response)) return {
+            isLoggedIn: false,
+            knownProblem: await response.json(),
+        };
+        return {
+            isLoggedIn: false,
+        };
+    }
+
+    async logout_async(): Promise<void> {
+        const response = await http_get_async(api_base("_/account/logout"));
+        if (!response.ok) {
+            const deleteCookieResponse = await fetch("/delete-cookie?key=" + CookieNames.session);
+            if (!deleteCookieResponse.ok) {
+                throw new Error("Could neither logout nor delete session cookie.");
+            }
+        }
+        return;
+    }
+
+    async create_account_async(payload: CreateAccountPayload): Promise<CreateAccountResponse> {
+        const response = await http_post_async(api_base("_/account/create"), payload);
+        if (response.ok) return { isCreated: true };
+        if (is_known_problem(response)) return {
+            isCreated: false,
+            knownProblem: await response.json(),
+        };
+        return {
+            isCreated: false,
+        };
+    }
+
+    async delete_current_async(): Promise<DeleteAccountResponse> {
+        const response = await http_delete_async(api_base("_/account/delete"));
+        return {
+            isDeleted: response.ok,
+        };
+    }
+
+    async update_current_async(payload: UpdateAccountPayload): Promise<UpdateAccountResponse> {
+        const response = await http_post_async(api_base("_/account/update"), payload);
+        if (response.ok) return { isUpdated: true };
+        if (is_known_problem(response)) return {
+            isUpdated: false,
+            knownProblem: await response.json(),
+        };
+        return {
+            isUpdated: false,
+        };
+    }
+}
+\ No newline at end of file