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web/js/auth.js

@@ -0,0 +1,69 @@
+const accessToken = localStorage.getItem('accessToken');
+
+async function isAccessTokenOkay() {
+    try {
+        const response = await fetch('/auth/check_access_token', {
+            method: 'GET',
+            headers: {
+                'Authorization': `Bearer ${accessToken}`,
+            }
+        });
+
+        if (response.status === 200) return true;
+        if (response.status === 401) return false;
+
+        console.error('Error: server sent unexpected HTTP status code', response.status);
+        return false;
+    } catch (err) {
+        console.error('Network or server error:', err);
+        return false;
+    }
+}
+
+(async () => {
+    if (!accessToken) return;
+
+    const valid = await isAccessTokenOkay();
+    if (valid && window.location.pathname === '/web/login') {
+        window.location.href = '/web/libraries';
+    }
+
+    if (!valid) {
+        window.location.href = '/web/login';
+    }
+})();
+
+//used in /web/login, not a general purpose function
+async function getAccessToken() {
+    const username = document.getElementById('username').value;
+    const password = document.getElementById('password').value;
+
+    try {
+        const response = await fetch('/auth/user_and_pass', {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+            },
+            body: JSON.stringify({ username, password })
+        });
+
+        if (response.status === 200) {
+            const data = await response.json();
+            const accessToken = data.AccessToken;
+
+            if (!accessToken) {
+                alert('Login failed: no token returned');
+                return;
+            }
+
+            localStorage.setItem('accessToken', accessToken);
+            window.location.href = '/web/libraries';
+        } else if (response.status === 401) {
+            alert('Invalid username or password');
+        } else {
+            alert('Server error, please try again later.');
+        }
+    } catch (err) {
+        alert('Network error, please try again later.');
+    }
+}