<?php
/**
 * New articles written in Suiko (23 October 2026): POST /articles creates a post, as a draft (default mode: someone
 * publishes it from WordPress) or published (direct mode). Title, slug, HTML body, SEO fields, category by name.
 */
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

add_action( 'rest_api_init', function () {
	register_rest_route( 'suiko/v1', '/articles', array( 'methods' => 'POST', 'callback' => 'suiko_rest_create', 'permission_callback' => 'suiko_rest_auth' ) );
}, 20 );

function suiko_rest_create( $request ) {
	$input = $request->get_json_params();
	if ( ! is_array( $input ) || empty( $input['title'] ) || ! isset( $input['content_html'] ) ) {
		return new WP_Error( 'suiko_bad_request', 'title and content_html are required.', array( 'status' => 400 ) );
	}
	$mode    = isset( $input['mode'] ) && 'direct' === $input['mode'] ? 'direct' : ( isset( $input['mode'] ) && 'draft' === $input['mode'] ? 'draft' : suiko_mode() );
	$type    = isset( $input['type'] ) && in_array( $input['type'], suiko_post_types(), true ) ? $input['type'] : 'post';
	$content = suiko_html_to_blocks( (string) $input['content_html'] );
	$lost    = suiko_lost_tags( $content );
	if ( $lost ) {
		return suiko_lost_tags_error( $lost );
	}
	$data    = array(
		'post_type'    => $type,
		'post_status'  => 'direct' === $mode ? 'publish' : 'draft',
		'post_title'   => wp_strip_all_tags( (string) $input['title'] ),
		'post_name'    => ! empty( $input['slug'] ) ? sanitize_title( basename( (string) $input['slug'] ) ) : '',
		'post_content' => $content,
		'post_excerpt' => isset( $input['excerpt'] ) && is_string( $input['excerpt'] ) ? wp_strip_all_tags( $input['excerpt'] ) : '',
	);
	// The author: the person who connected the site to Suiko; the site can reassign it. No user is logged in during this request.
	$author = (int) get_option( 'suiko_author' );
	if ( $author && get_userdata( $author ) ) {
		$data['post_author'] = $author;
	}
	if ( 'post' === $type && ! empty( $input['category'] ) && is_string( $input['category'] ) ) {
		$term = get_term_by( 'name', $input['category'], 'category' ) ?: get_term_by( 'slug', sanitize_title( $input['category'] ), 'category' );
		if ( ! $term ) {
			$new  = wp_insert_term( sanitize_text_field( $input['category'] ), 'category' );
			$term = is_wp_error( $new ) ? null : get_term( $new['term_id'], 'category' );
		}
		if ( $term ) {
			$data['post_category'] = array( (int) $term->term_id );
		}
	}
	$id = wp_insert_post( wp_slash( $data ), true );
	if ( is_wp_error( $id ) ) {
		return $id;
	}
	if ( isset( $input['seo'] ) && is_array( $input['seo'] ) ) {
		suiko_seo_write( $id, $input['seo'] );
	}
	update_post_meta( $id, '_suiko_created_at', gmdate( 'c' ) );
	$post = get_post( $id );
	return array(
		'status'   => 'publish' === $post->post_status ? 'published' : 'draft',
		'id'       => (string) $id,
		'slug'     => suiko_public_slug( $post ),
		'url'      => 'publish' === $post->post_status ? get_permalink( $post ) : null,
		'edit_url' => admin_url( 'post.php?post=' . (int) $id . '&action=edit' ),
	);
}