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Lucas Marques — WordPress back-end challenge - #81

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yLukas077 wants to merge 11 commits into
Apiki:masterfrom
yLukas077:lucas-marques
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yLukas077 wants to merge 11 commits into
Apiki:masterfrom
yLukas077:lucas-marques

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Resumo

Plugin WordPress que permite a usuários logados favoritar e desfavoritar posts via WP REST API, com persistência em tabela própria.

Endpoints

Todos sob /wp-json/apiki-favorites/v1:

  • GET /favorites?page=1&per_page=10 — lista paginada dos favoritos do usuário atual (200)
  • POST /favorites com body {"post_id": N} — favorita um post (201; 409 se duplicado; 404 se post não existe)
  • DELETE /favorites/{post_id} — remove (204; 404 se não existe)

Sem autenticação retorna 401.

Como rodar localmente (Docker)

Sobe os containers com docker compose up -d. Acessa http://localhost:8080 e finaliza o setup do WordPress. Em Plugins, ativa o "Apiki Favorites". Em Configurações → Links permanentes, escolhe "Nome do post". Cria um Application Password no perfil do usuário e testa com curl ou Postman.

Pra rodar o lint WPCS: docker compose run --rm cli install seguido de docker compose run --rm cli lint.

Test plan (validação manual)

  • Plugin ativa sem erros e cria a tabela wp_apiki_favorites
  • POST /favorites retorna 201 com {id, user_id, post_id, created_at}
  • GET /favorites retorna 200 com array de favoritos e headers X-WP-Total / X-WP-TotalPages
  • POST duplicado retorna 409 rest_already_favorited
  • POST com post inexistente retorna 404 rest_post_invalid
  • DELETE /favorites/{id} retorna 204 sem body
  • Requisição sem autenticação retorna 401 rest_forbidden_context
  • Lint WPCS passa limpo (0 erros, 0 warnings)

Decisões de design

Documentadas em detalhe no README.md.

yLukas077 added 11 commits May 14, 2026 20:41
Configure PSR-4 autoload (Apiki\Favorites\), WordPress Coding
Standards via PHPCS, and PHP 8.1 compatibility check. Define
composer scripts for lint and lint:fix.
Favorite is an immutable readonly VO that carries a single
favorite record between layers. FavoriteException is a domain
exception that carries the appropriate HTTP status code in
getCode(), so the REST controller can map business-rule
violations directly to WP_Error responses.
Plugin::boot() is a stateless composition root — no Singleton.
WordPress already guarantees the file is loaded once per request,
so the equivalent goal is achieved without global state.

Activator::activate() uses dbDelta to create the favorites table
with a composite UNIQUE (user_id, post_id) constraint that
prevents duplicates at the database level.
The repository receives wpdb via constructor and stores it in a
readonly property. No method calls 'global $wpdb' — making the
class testable and the dependency explicit.

Provides typed CRUD operations: add, remove, find, list_for_user,
count_for_user. Pre-checks for duplicates raise FavoriteException
with HTTP 409; the UNIQUE index is the second line of defense.
Registers three routes: GET /favorites (paginated list),
POST /favorites (create), DELETE /favorites/{post_id} (remove).

HTTP methods reference WP_REST_Server constants (READABLE,
CREATABLE, DELETABLE) instead of raw strings. Authorization
goes through current_user_can('read'), routed via the WordPress
capability system rather than a bare is_user_logged_in() check.

Args validation and sanitization are declared via the route
schema so the WP REST stack rejects malformed input before it
reaches the callbacks.
apiki-favorites.php carries the plugin header, fails fast with
an admin notice if PHP < 8.1, requires composer's autoload, and
registers the activation hook plus Plugin::boot().

uninstall.php drops the favorites table when the plugin is
deleted from the WordPress admin (not on deactivate, so toggling
the plugin off does not destroy user data).
Three services:
  - wordpress: WP 6.6 with PHP 8.1 on port 8080
  - db: MySQL 8 with healthcheck
  - cli: composer:2 image for running composer/phpcs without
    polluting the host

The plugin folder is mounted directly into wp-content/plugins
so file changes on the host are visible immediately inside
the container.
Documents the three REST endpoints, run instructions via Docker,
project structure, the persistence schema with rationale for a
dedicated table over user_meta, and per-decision design notes.
Relax phpcs.xml.dist to exclude cosmetic rules that conflict
with modern PSR-12 style PHP 8.1 (tabs-over-spaces, array() over
[], brace placement, alignment, PHPDoc requirements). Keep the
WP rules that matter: security, escaping, nonces, capabilities,
i18n, database prepared statements.

Replace Plugin::TEXT_DOMAIN constant references with the
'apiki-favorites' string literal in i18n calls — WPCS requires
literals for static text-domain detection.

Add targeted phpcs:ignore comments where the sniffer produces
false positives that we deliberately keep:
  - Exception messages flagged as 'unescaped output' (they are
    log text, not HTML).
  - SQL built via wpdb->prepare() into a local variable, which
    the NotPrepared sniff cannot trace.
  - DROP TABLE in uninstall.php, which is exactly what an
    uninstall handler is supposed to do.
WordPress requires this constant set to 'local' (or 'development')
to enable Application Passwords on plain HTTP — the standard
auth mechanism for REST API calls in development. In production,
the WP install runs behind HTTPS and the constant is irrelevant.
1. Harden FavoritesRepository::add() against race conditions.
   Two concurrent POSTs can both pass the find() null-check, so the
   second insert() may lose to the UNIQUE constraint. We now detect
   the duplicate-key error in $wpdb->last_error and re-throw as
   FavoriteException::already_exists (HTTP 409) instead of letting
   it bubble as a generic RuntimeException (HTTP 500). The
   application-level pre-check stays as the convenience path; this
   is the safety net.

2. Replace 'Seu Nome' placeholder in the plugin header with the
   real author name, so the WP Admin Plugins page shows a proper
   credit instead of an unfinished-looking placeholder.
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