From 28345295b625ff9a0fdd0a603cc5a7a61d050ed9 Mon Sep 17 00:00:00 2001
From: Oliver <oad@notps.local>
Date: Mon, 25 May 2026 12:13:39 -0300
Subject: [PATCH] Added credential persistance

---
 agent.md   | 149 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 index.html |  91 +++++++++++++++++++++++++++-----
 2 files changed, 226 insertions(+), 14 deletions(-)
 create mode 100644 agent.md

diff --git a/agent.md b/agent.md
new file mode 100644
index 0000000..4a25f26
--- /dev/null
+++ b/agent.md
@@ -0,0 +1,149 @@
+# Health Routine – Package Scanner
+
+> ALWAYS UPDATE THIS FILE AFTER MAKING CHANGES
+
+## What this is
+A single-page web app (`index.html`) used internally by Health Routine staff to scan **package** barcodes.
+A user selects their name, scans/types a code, and the result is looked up via a webhook and appended to a table.
+Runs in any browser — designed for phones, tablets, and desktop.
+
+## Files
+```
+index.html   — the entire app (HTML + CSS + JS, no build step)
+logo.png     — Health Routine brand logo (used in the header)
+agent.md     — this file
+start        — bash script that launches live-server on localhost:8080
+```
+
+## Design
+Colors are pulled directly from healthroutine.de's CSS variables:
+
+| Token            | Hex       | Usage                               |
+|------------------|-----------|-------------------------------------|
+| `--primary`      | `#005f5a` | Controls bar, table header, buttons |
+| `--primary-dark` | `#004845` | Hover states                        |
+| `--primary-light`| `#e0f0ef` | Row hover, badge backgrounds        |
+| `--bg`           | `#f7f7fa` | Page background                     |
+| `--card`         | `#eaeaf2` | Alternating table rows              |
+| `--sage`         | `#82917d` | (brand footer green, available)     |
+| `--error`        | `#c71b1b` | Error states                        |
+| `--success`      | `#15803d` | Success toasts                      |
+
+Font: system font stack (`-apple-system`, `Segoe UI`, etc.)
+
+## Webhook
+
+**Base URL:** `https://brandize.app.n8n.cloud/webhook/e0268b0f-4935-49ba-bfdf-1c0ee01d3b9d`
+
+### GET — load users
+Called once on page load to populate the user dropdown.
+
+```
+GET <base_url>
+Authorization: Basic <base64>
+```
+
+Response — n8n may return a JSON array, a single object, or NDJSON.
+All three formats are handled by `parseJson()` (see below).
+```json
+[
+  { "Name": "Oliver", "id": 1, "createdAt": "...", "updatedAt": "..." },
+  { "Name": "Luka",   "id": 2, ... },
+  { "Name": "Benni",  "id": 3, ... }
+]
+```
+
+### POST — submit scan
+Called when the user presses Enter in the scan input.
+
+```
+POST <base_url>
+Authorization: Basic <base64>
+Content-Type: application/json
+
+{ "user": "Oliver", "code": "SCANNED_BARCODE_STRING" }
+```
+
+Success response:
+```json
+{
+  "name":       "Christa Gierdahl, Christa Gierdahl",
+  "producttag": "0-HR-Nail-Care-5",
+  "batch":      "BATCH/25-11-14/06173",
+  "country":    "DE"
+}
+```
+
+Error response (non-2xx **or** 200 with error field):
+```json
+{ "error": "Human-readable error description" }
+```
+
+Fields mapped to table columns:
+- `country`    → **Country** (teal pill badge)
+- `name`       → **Name**
+- `producttag` → **Tag** (monospace pill, truncated with tooltip on hover)
+- `batch`      → received but not displayed in the table
+
+### Authentication
+The webhook requires HTTP Basic Auth.
+
+- On `401` (GET or POST) a modal appears asking for username + password.
+- Credentials are saved to a **cookie** (`hr_auth`, 30-day expiry, `SameSite=Strict`) so the user is not prompted again.
+- On page load, the cookie is read and credentials restored before the first network call.
+- If the modal is triggered again (e.g. wrong password), the fields are **pre-filled** from the cookie and focus lands on the password field for quick confirmation.
+- `saveCreds(user, pass)` — JSON-stringifies, URI-encodes, base64-encodes, writes cookie.
+- `loadCredsFromCookie()` — reverses that; returns `{ user, pass }` or `null`.
+- `clearCredsCookie()` — available but not exposed in UI (call from browser console if needed).
+
+### Error handling (POST)
+Two cases:
+1. **Non-2xx response** — body is parsed; if `errData.error` exists it is shown verbatim; otherwise a generic `HTTP <status>` message is shown.
+2. **200 response with `error` field** — treated as failure: `item.error` is displayed, row is *not* added to the table.
+
+Errors appear in the **persistent status banner** (red, no auto-dismiss) and the scan input is selected so the user can re-scan or correct the code.
+
+### NDJSON / response format
+n8n sometimes returns multiple items as NDJSON (one JSON object per line) instead of a proper JSON array. `parseJson(res)` handles all three formats:
+1. Standard JSON array `[...]`
+2. Single JSON object `{...}` — passed through as-is
+3. NDJSON — split on `\n`, each line parsed individually, returned as an array
+
+## UI layout
+
+```
+┌─────────────────────────────────────────────────────┐
+│  [HR logo]  Health Routine  |  Package Scanner       │  ← white brand bar
+├─────────────────────────────────────────────────────┤
+│  [▥ SCAN HERE_____________]  [User ▾]  [✕ Clear]    │  ← teal controls bar
+├─────────────────────────────────────────────────────┤
+│  SCAN LOG                               3 scans ●   │
+│ ┌───────────────────────────────────────────────┐   │
+│ │ COUNTRY  │ NAME                  │ TAG         │   │  ← sticky header
+│ ├──────────┼───────────────────────┼─────────────┤   │
+│ │ DE       │ Christa Gierdahl      │ 0-HR-Nail…  │   │  ← newest row on top
+│ │ AT       │ ...                   │ ...         │   │
+│ │          scrollable area          │             │   │
+│ └───────────────────────────────────────────────┘   │
+└─────────────────────────────────────────────────────┘
+```
+
+On mobile (< 620 px): scan input goes full-width on its own row; user dropdown and clear button share the row below.
+
+## Key behaviours
+- **On load**: cookie credentials restored → GET webhook fires → dropdown populated → scan input auto-focused
+- **Enter key**: trims input, POSTs to webhook, prepends result row, clears + re-focuses input
+- **Clear button**: empties the table, clears the scan input, resets the scan counter
+- **No user selected**: red toast + highlighted dropdown; does not submit
+- **401 on any request**: modal prompts for credentials (pre-filled from cookie), saves to cookie, retries original call
+- **Webhook error**: `error` field shown verbatim in persistent red banner; input selected for re-scan
+- **Network error**: dismissing error banner; input selected so user can retry
+- **Dropdown error state**: tapping/focusing the dropdown while it shows an error re-triggers `loadUsers()`
+- **NDJSON/array/object**: `parseJson()` normalises all response formats from n8n
+
+## How to run
+Open `index.html` directly in a browser (`file://`) — no server needed for local use.
+Or run the `start` script for live-reload during development:
+```bash
+./start   # requires Node.js; installs live-server globally if missing
+```
diff --git a/index.html b/index.html
index 072d957..7051c61 100644
--- a/index.html
+++ b/index.html
@@ -6,7 +6,7 @@
             name="viewport"
             content="width=device-width, initial-scale=1.0, user-scalable=no"
         />
-        <title>Health Routine – Product Scanner</title>
+        <title>Health Routine – Package Scanner</title>
         <style>
             *,
             *::before,
@@ -808,7 +808,7 @@
             </div>
             <span class="brand-name">Health Routine</span>
             <div class="brand-divider"></div>
-            <span class="brand-subtitle">Product Scanner</span>
+            <span class="brand-subtitle">Package Scanner</span>
         </div>
 
         <!-- Controls bar -->
@@ -898,7 +898,7 @@
                     </div>
                     <div class="empty-title">No scans yet</div>
                     <div class="empty-hint">
-                        Select a user, then scan or type a product code and
+                        Select a user, then scan or type a package code and
                         press Enter
                     </div>
                 </div>
@@ -994,6 +994,51 @@
             const modalError = document.getElementById("modalError");
             const toast = document.getElementById("toast");
 
+            // ── Cookie helpers ────────────────────────────────────────────────────────
+            function saveCreds(user, pass) {
+                const val = btoa(
+                    encodeURIComponent(JSON.stringify({ user, pass })),
+                );
+                document.cookie = `hr_auth=${val}; max-age=${30 * 24 * 3600}; SameSite=Strict; path=/`;
+            }
+
+            function loadCredsFromCookie() {
+                const match = document.cookie.match(
+                    /(?:^|;\s*)hr_auth=([^;]+)/,
+                );
+                if (match) {
+                    try {
+                        return JSON.parse(decodeURIComponent(atob(match[1])));
+                    } catch (_) {}
+                }
+                return null;
+            }
+
+            function clearCredsCookie() {
+                document.cookie = "hr_auth=; max-age=0; path=/";
+            }
+
+            // ── JSON parser (handles array, single object, and NDJSON) ───────────────
+            async function parseJson(res) {
+                const text = await res.text();
+                // Standard JSON (array or object)
+                try {
+                    const parsed = JSON.parse(text);
+                    return parsed;
+                } catch (_) {}
+                // NDJSON — n8n sometimes returns one object per line
+                try {
+                    const lines = text
+                        .trim()
+                        .split("\n")
+                        .filter((l) => l.trim());
+                    if (lines.length > 0) {
+                        return lines.map((l) => JSON.parse(l));
+                    }
+                } catch (_) {}
+                throw new Error("Could not parse server response");
+            }
+
             // ── Helpers ──────────────────────────────────────────────────────────────
             function esc(str) {
                 return String(str ?? "")
@@ -1052,10 +1097,16 @@
             function needAuth(retryCb) {
                 pendingAuthCb = retryCb;
                 modalError.style.display = "none";
-                authUser.value = "";
-                authPass.value = "";
+                // Pre-fill from saved cookie so user only needs to confirm
+                const saved = loadCredsFromCookie();
+                authUser.value = saved?.user || "";
+                authPass.value = saved?.pass || "";
                 authModal.classList.remove("hidden");
-                setTimeout(() => authUser.focus(), 50);
+                // Focus password if username already filled, otherwise username
+                setTimeout(
+                    () => (saved ? authPass.focus() : authUser.focus()),
+                    50,
+                );
             }
 
             function cancelAuth() {
@@ -1075,6 +1126,7 @@
                 }
 
                 creds = { user: u, pass: p };
+                saveCreds(u, p); // persist to cookie
                 authBtn.classList.add("loading");
                 authBtn.disabled = true;
                 modalError.style.display = "none";
@@ -1120,7 +1172,7 @@
                         return;
                     }
 
-                    const data = await res.json();
+                    const data = await parseJson(res);
                     buildDropdown(data);
                     hideBanner();
                 } catch (err) {
@@ -1164,7 +1216,7 @@
                     return;
                 }
 
-                showBanner("Looking up product…", "loading");
+                showBanner("Looking up package…", "loading");
 
                 try {
                     const res = await fetch(WEBHOOK, {
@@ -1182,16 +1234,24 @@
                     }
 
                     if (!res.ok) {
-                        showBanner(
-                            `Scan failed (HTTP ${res.status}).`,
-                            "error",
-                            5000,
-                        );
+                        // Try to extract a descriptive error from the response body
+                        let errMsg = `Scan failed (HTTP ${res.status}).`;
+                        try {
+                            const errData = await parseJson(res);
+                            if (errData?.error) errMsg = errData.error;
+                        } catch (_) {}
+                        showBanner(errMsg, "error", 0); // persistent until next action
                         scanInput.select();
                         return;
                     }
 
-                    const item = await res.json();
+                    const item = await parseJson(res);
+                    // Webhook may return 200 but carry an error field
+                    if (item?.error) {
+                        showBanner(item.error, "error", 0);
+                        scanInput.select();
+                        return;
+                    }
                     hideBanner();
                     addRow(item);
                     showToast(
@@ -1265,6 +1325,9 @@
 
             // ── Init ─────────────────────────────────────────────────────────────────
             window.addEventListener("DOMContentLoaded", () => {
+                // Restore saved credentials before the first network call
+                const saved = loadCredsFromCookie();
+                if (saved) creds = saved;
                 loadUsers();
                 scanInput.focus();
             });