CampgroundTickets/docs/fluentforms-donor-discount.md

# FluentForms → donor discount lookup

FluentForms has no native way to query an external database from a field. This
wires it up with a small Custom JS block that calls our secret-gated endpoint
and unlocks a discount when the entered email belongs to a donor/member.

## Endpoint

```
GET https://scan.beartariacampgrounds.com/api/public/donor-eligibility?key=<SECRET>&email=<email>
```

- `key` = the value of `PUBLIC_LOOKUP_SECRET` (set in the backend `.env`).
- Returns minimal JSON — never names or dollar amounts:
  - `{"eligible": true,  "tier": "member"}`
  - `{"eligible": true,  "tier": "donor"}`
  - `{"eligible": false, "tier": null}`
- Rate-limited (30/min/IP) and CORS-restricted to `PUBLIC_LOOKUP_ORIGIN`
  (default `https://tickets.beartariacampgrounds.com`).

> The secret is visible in page source, so treat this as *deterrence, not
> security*. It only gates a discount and reveals a yes/no + tier, so the blast
> radius is small. Rotate the secret by changing `PUBLIC_LOOKUP_SECRET` and
> redeploying.

## Form setup (conditional pricing)

The idea: a **hidden field** `donor_tier` holds `regular` / `donor` / `member`.
The JS sets it from the email lookup, and your payment options are shown/hidden
by FluentForms conditional logic based on its value.

1. **Hidden field.** Add a *Hidden Field*, name it exactly `donor_tier`, default
   value `regular`.
2. **Email field.** Note its name (default `email`).
3. **Payment options.** Set up two payment items (or two options of a
   multiple-choice payment field) — a regular price and a discounted price — and
   give each **conditional logic**:
   - **Regular price:** show when `donor_tier` **is** `regular`
   - **Donor price:** show when `donor_tier` **is** `donor` **OR** `donor_tier`
     **is** `member` (add both rules with "match any").
4. **Custom HTML.** Add a *Custom HTML* element and paste the snippet below,
   setting `KEY` to your `PUBLIC_LOOKUP_SECRET` (and `EMAIL_SELECTOR` if your
   email field isn't named `email`).

> FluentForms is Vue-driven, so a plain `input.value = …` won't update its
> model and conditional logic won't fire. The snippet uses the native value
> setter + dispatches `input`/`change`, which is the reliable way to make FF
> notice a programmatic change. Test on your form; if conditional logic still
> doesn't react, tell me your FF version and I'll adapt.

## Snippet

```html
<div id="donor-status" style="margin:6px 0;font-size:14px;font-weight:600;"></div>
<script>
(function () {
  var API = "https://scan.beartariacampgrounds.com/api/public/donor-eligibility";
  var KEY = "REPLACE_WITH_PUBLIC_LOOKUP_SECRET";
  var EMAIL_SELECTOR = 'input[name="email"]';        // adjust if needed
  var TIER_SELECTOR  = 'input[name="donor_tier"]';   // the hidden field
  var statusEl = document.getElementById("donor-status");
  var lastChecked = "";

  // Set a framework-bound input's value so Vue/React actually notice it.
  function setNativeValue(el, value) {
    var proto = Object.getPrototypeOf(el);
    var protoSetter = Object.getOwnPropertyDescriptor(proto, "value");
    var ownSetter = Object.getOwnPropertyDescriptor(el, "value");
    if (ownSetter && protoSetter && ownSetter.set !== protoSetter.set) {
      protoSetter.set.call(el, value);
    } else if (protoSetter) {
      protoSetter.set.call(el, value);
    } else {
      el.value = value;
    }
    el.dispatchEvent(new Event("input", { bubbles: true }));
    el.dispatchEvent(new Event("change", { bubbles: true }));
  }

  function setTier(tier) {
    var el = document.querySelector(TIER_SELECTOR);
    if (el) setNativeValue(el, tier);   // "regular" | "donor" | "member"
  }

  function check(email) {
    if (!email || email === lastChecked) return;
    lastChecked = email;
    statusEl.textContent = "Checking donor status…";
    statusEl.style.color = "#888";
    fetch(API + "?key=" + encodeURIComponent(KEY) + "&email=" + encodeURIComponent(email))
      .then(function (r) { return r.json(); })
      .then(function (d) {
        if (d && d.eligible) {
          setTier(d.tier);                                // "member" or "donor"
          statusEl.textContent = (d.tier === "member" ? "🐻 Member" : "⭐ Donor") + " pricing unlocked!";
          statusEl.style.color = "#1b7f3b";
        } else {
          setTier("regular");
          statusEl.textContent = "";
        }
      })
      .catch(function () { setTier("regular"); statusEl.textContent = ""; });
  }

  function bind() {
    var el = document.querySelector(EMAIL_SELECTOR);
    if (!el) { return setTimeout(bind, 500); }   // form may render late
    setTier("regular");                          // start at regular price
    el.addEventListener("blur", function () { check(el.value.trim().toLowerCase()); });
  }
  bind();
})();
</script>
```

## Test

```
curl "https://scan.beartariacampgrounds.com/api/public/donor-eligibility?key=<SECRET>&email=<a-real-donor-email>"
# donor/member -> {"eligible":true,"tier":"member"}
# anyone else  -> {"eligible":false,"tier":null}
```

If member and donor get the **same** discounted price, simplify: set the donor
price to show when `donor_tier` **is not** `regular`, and you can ignore the
member/donor distinction.