nolimit-discounts/docs/SETUP.md

# Setting it up

## Installing

Updates come from the plugin's own release feed, not wordpress.org.

1. Download `woocommerce-email-discount-manager.zip` from the latest release at
   `https://gitea.nolimit.dk/kw/nolimit-discounts-dist/releases`.
2. **Plugins → Add New → Upload Plugin.**
3. Activate. WooCommerce must already be active — activation stops with an
   error message if it is not, rather than activating into a broken state.

After the first install, the plugin offers its own updates in **Dashboard →
Updates** like any other. Nothing else needs configuring for that to work.

### If the update fails with "could not copy file"

The plugin directory is not writable by the user PHP runs as. This is a file
ownership problem on the server, not a fault in the release — WordPress cannot
overwrite files it does not own. Check it as the web server's user rather than
as root, because root can write everything and the check will pass for the
wrong reason:

```
docker exec <container> sh -c 'find /var/www/html/wp-content/plugins/woocommerce-email-discount-manager -type f | wc -l'
docker exec -u 33 <container> sh -c 'find /var/www/html/wp-content/plugins/woocommerce-email-discount-manager -type f -writable | wc -l'
```

The two numbers must be equal. `33` is `www-data` on the Debian-based images;
confirm with `ps -o user,args -e | grep apache` before trusting it.

## The three screens

**WooCommerce → Nolimit Discounts** (also reachable under the shared **Nolimit**
menu) has three tabs.

### Groups

A group is a name, a discount percent, and a list of WooCommerce product
categories. The percent applies to products in those categories and nothing
else. Categories are ordered by drag and drop; the order is cosmetic.

### Emails

One row per email pattern. Each row picks **one** of Group, Coupon or Custom —
they are exclusive, and the form will not let a row carry two.

This is the screen where a decision is actually required: **how specific should
the pattern be?** A domain pattern (`@company.com`) gives the discount to every
current and future address at that company, including ones nobody has seen yet.
A fragment pattern (`john`) matches `john@anywhere.com` and also
`johnson@example.org`. If a discount is worth real money, use the full address.

### Shipping

Per group, per shipping method, one of **show** or **hide**.

The consequence worth understanding before using this tab: a method any group
is told to **show** becomes reserved. Customers who match no group stop seeing
it everywhere on the shop, not only inside that group. That is the point — it
is how "free delivery for approved addresses" stays unavailable to everybody
else — but it means adding one show rule changes what strangers see.

## How to tell it is working

Not "no errors". A specific number on a specific screen:

1. **WooCommerce → Nolimit Discounts → Emails.** The row you added is listed
   with its type and its value. If the tab is empty after saving, the write
   failed and nothing else below will work.

2. **The Nolimit dashboard card.** **Nolimit** in the admin menu shows a card
   for this plugin with two counts — groups and email assignments. They should
   equal what the Groups and Emails tabs show. The card is cached for five
   minutes, so wait that long before reading it as disagreement.

3. **The real test, in a cart.** Log in as (or check out with) an address that
   matches a pattern and put a product from a covered category in the cart.
   The cart totals show a **negative fee line** carrying the group's name. No
   line means no match — check the pattern, not the percent.

4. **Shipping, if you set any rules.** With rules in place, compare the
   checkout as a matching customer and in a private window as a stranger. The
   reserved method must be absent for the stranger. Both should show at least
   one method; if the stranger sees *everything*, the rules emptied the list
   and the never-leave-them-stranded fallback returned all of them.

5. **Updates.** **Dashboard → Updates** names this plugin with a version and
   draws its icon. A broken image there means the release is missing its
   `assets/` — report it rather than pressing update.

## Settings that need no decision

There is no settings page beyond the three tabs. Rate limiting on the REST API
and the audit log's retention are on by default and adjustable only by filter
— see CONTRACT.md. A shop that does not want to write code never touches them.