=== WooCommerce Email Discount Manager ===
Contributors: wedsmp
Tags: woocommerce, discount, email, shipping, coupon
Requires at least: 5.8
Tested up to: 7.1
Requires PHP: 7.4
Stable tag: 1.4.2
WC requires at least: 6.0
WC tested up to: 11.1.0
License: GPLv2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html

Apply discounts and show/hide shipping methods based on the customer's email address.

== Description ==

WooCommerce Email Discount Manager lets you give discounts and filter available
shipping methods based on the email address a customer logs in or checks out with.

= Discount Groups =

* Create discount groups with a name and a discount percent.
* Attach any number of WooCommerce product categories to a group (drag & drop ordering).
* The group's discount percent applies to all products in the attached categories.

= Email Assignments =

Assign an email pattern to exactly one of three discount types:

* **Group** — the customer inherits a discount group's percent and categories.
* **Coupon** — an existing WooCommerce coupon is auto-applied at checkout.
* **Custom** — a custom percent applied to the entire cart.

Email patterns can be:

* A full email address: `[email protected]`
* A domain: `@company.com` (matches everyone on that domain)
* A partial match: `john` (matches any email containing "john")

Matching priority: exact email first, then domain, then partial match.
Assignments can be toggled active/inactive and work for both logged-in users
and guests (via the checkout billing email field, tracked with AJAX).

Every assignment can additionally grant **free shipping** — all shipping
methods become free at checkout for matching emails, regardless of the
assignment type. Coupon assignments pick from your existing WooCommerce
coupons in a dropdown.

= Shipping Rules =

* Per discount group, choose which shipping methods are shown or hidden.
* No rules for a group means all shipping methods behave normally.
* If any method is set to "Show", only "Show" methods are offered (whitelist).
* Drag & drop reordering controls the order methods appear in at checkout.

= How discounts are applied =

* Group and custom discounts are applied as negative fees on the cart.
* Coupons are applied via the standard WooCommerce coupon system.

== Installation ==

1. Upload the `woocommerce-email-discount-manager` folder to `/wp-content/plugins/`.
2. Make sure WooCommerce is installed and active.
3. Activate the plugin through the Plugins screen in WordPress.
4. Go to WooCommerce → Email Discounts to configure groups, assignments and shipping rules.

= REST API =

The plugin exposes a `wc-edm/v1` namespace for remote management (groups,
email assignments, shipping rules, audit log). Every route requires an
authenticated user with the `manage_woocommerce` capability — use a WordPress
Application Password over HTTPS.

Requests are rate limited per user (or per IP when unauthenticated) and all
changes are written to the audit log. Both are adjustable with filters:

* `wc_edm_rate_limit_enabled` (bool)
* `wc_edm_rate_limit_max_requests` (int, $method)
* `wc_edm_rate_limit_window` (int seconds, $method)
* `wc_edm_audit_log_enabled` (bool)
* `wc_edm_audit_log_retention_days` (int)
* `wc_edm_client_ip` (string) — override IP resolution behind a proxy/CDN

== Frequently Asked Questions ==

= Does it work for guests? =

Yes. When a guest types their email in the checkout billing email field, the
plugin stores it in the WooCommerce session via AJAX and recalculates the cart,
so discounts and shipping rules apply immediately.

= What happens if several patterns match one email? =

The most specific match wins: exact email, then domain, then partial match.

== Changelog ==

= 1.4.2 =
* The plugin now has an icon, so it no longer shows up as a generic grey plug under Dashboard → Updates.
* "Check again" on the updates screen really does check again. It previously reused a cached answer for up to six hours, which made a brand new version look like it had not been published.

= 1.4.1 =
* The update check now builds the download address itself instead of using the one the repository reports. The repository was reporting a plain-HTTP address on a raw IP, which would have meant downloading plugin code over an unencrypted connection to an address that is free to change. Anyone on 1.4.0 gets this automatically with the next update.

= 1.4.0 =
* The plugin now updates itself. WordPress checks the plugin's own release feed and offers new versions in Plugins and Dashboard → Updates, so an update no longer means uploading a zip by hand. The per-plugin "Enable auto-updates" link works too.
* Tested against WordPress 7.1 and WooCommerce 11.1, and against the next release of each, so an update to either is checked before it reaches a shop rather than after.
* Nothing about the site is sent when it checks for updates. The request is an unauthenticated read of a public file, and the user agent is overridden because WordPress's default one carries the site's own address.

= 1.3.1 =
* Hardened loading: a class file that cannot be read is now recorded and reported in an admin notice instead of causing a fatal error. During a plugin upgrade WordPress replaces files one at a time, so a request landing mid-copy could previously take down wp-admin.
* Admin tabs are only shown when their controller loaded, so an incomplete install costs a tab rather than the whole screen.

= 1.3.0 =
* Added an audit log: every change made through the REST API is recorded with user, IP, endpoint and time, along with rejected and rate limited requests. Viewable under WooCommerce → Email Discounts → Audit Log, and via GET /wp-json/wc-edm/v1/audit-log.
* Added rate limiting on the REST API (default 60 reads and 20 writes per minute per user or IP), returning HTTP 429. Limits are filterable.
* Entries are pruned automatically after 30 days (filterable).

= 1.2.0 =
* Added a free shipping toggle on email assignments — matching customers get all shipping methods at zero cost, works with every assignment type.
* Coupon assignments now pick from the shop's existing WooCommerce coupons in a dropdown instead of a free-text field.
* Database schema upgrades automatically after plugin updates (no re-activation needed).

= 1.1.0 =
* Added REST API (namespace wc-edm/v1) for remote management of groups, email assignments and shipping rules. All routes require an authenticated user with the manage_woocommerce capability (use an Application Password over HTTPS).

= 1.0.0 =
* Initial release: discount groups, email assignments (group/coupon/custom), shipping rules, dashboard.