issuem-taxonomy.php

<?php

/**
 * Registers IssueM Issue Taxonomy w/ Meta Boxes
 *
 * @package IssueM
 * @since 1.0.0
 */

/**
 * Registers IssueM Issue Taxonomy
 *
 * @since 1.0.0
 */
function create_issue_taxonomy() {
	$labels = array(

		'name'              => __( 'Issues', 'issuem' ),
		'singular_name'     => __( 'Issue', 'issuem' ),
		'search_items'      => __( 'Search Issues', 'issuem' ),
		'all_items'         => __( 'All Issues', 'issuem' ),
		'parent_item'       => __( 'Parent Issues', 'issuem' ),
		'parent_item_colon' => __( 'Parent Issues:', 'issuem' ),
		'edit_item'         => __( 'Edit Issues', 'issuem' ),
		'update_item'       => __( 'Update Issues', 'issuem' ),
		'add_new_item'      => __( 'Add New Issues', 'issuem' ),
		'new_item_name'     => __( 'New Issue', 'issuem' ),
		'menu_name'         => __( 'Issues', 'issuem' ),

	);

	register_taxonomy(
		'issuem_issue',
		array( 'article' ),
		array(
			'hierarchical' => true,
			'labels'       => $labels,
			'show_ui'      => true,
			'query_var'    => true,
			'show_in_rest' => true,
			'rewrite'      => array( 'slug' => 'issue' ),
			'capabilities' => array(
				'manage_terms' => 'manage_issues',
				'edit_terms'   => 'manage_issues',
				'delete_terms' => 'manage_issues',
				'assign_terms' => 'edit_issues',
			),

		)
	);
}
add_action( 'init', 'create_issue_taxonomy', 0 );

function issuem_issue_term_edit_form_tag() {
	echo ' enctype="multipart/form-data" ';
}
add_action( 'issuem_issue_term_edit_form_tag', 'issuem_issue_term_edit_form_tag' );


/**
 * Filters column headings for Issues
 *
 * @since 1.0.0
 *
 * @param array $columns
 * @return array $columns
 */
function issuem_issue_columns( $columns ) {

	$columns['issue_order']  = __( 'Issue Order', 'issuem' );
	$columns['issue_status'] = __( 'Issue Status', 'issuem' );

	return $columns;
}
add_filter( 'manage_edit-issuem_issue_columns', 'issuem_issue_columns', 10, 1 );

/**
 * Filters sortable columns
 *
 * @since 1.0.0
 *
 * @param array $columns
 * @return array $columns
 */
function issuem_issue_sortable_columns( $columns ) {

	$columns['issue_order'] = 'issue_order';

	return $columns;
}
add_filter( 'manage_edit-issuem_issue_sortable_columns', 'issuem_issue_sortable_columns', 10, 1 );



add_filter( 'terms_clauses', 'issuem_issue_filter_terms_clauses', 10, 3 );

/**
 * Filter WP_Term_Query meta query
 *
 * @param   object  $query  WP_Term_Query
 * @return  object
 */
function issuem_issue_filter_terms_clauses( $pieces, $taxonomies, $args ) {

	global $pagenow, $wpdb;

	// Require ordering
	$orderby = ( isset( $_GET['orderby'] ) ) ? sanitize_text_field( $_GET['orderby'] ) : '';
	if ( empty( $orderby ) ) {
		return $pieces;
	}

	if ( empty( $taxonomies ) ) {
		return $pieces;
	}

	// set taxonomy
	$taxonomy = $taxonomies[0];

	// only if current taxonomy or edit page in admin
	if ( ! is_admin() || $pagenow !== 'edit-tags.php' || ! in_array( $taxonomy, array( 'issuem_issue' ) ) ) {
		return $pieces;
	}

	// and ordering matches
	if ( $orderby === 'issue_order' ) {
		$pieces['join']   .= ' INNER JOIN ' . $wpdb->termmeta . ' AS tm ON t.term_id = tm.term_id ';
		$pieces['where']  .= ' AND tm.meta_key = "issue_order"';
		$pieces['orderby'] = ' ORDER BY tm.meta_value ';
	}

	return $pieces;
}


/**
 * Sets data for custom article cateagory columns
 *
 * @since 1.0.0
 * @todo there is a better way to do this sort
 *
 * @param mixed $blank
 * @param string $column_name
 * @param int $term_id
 *
 * @return mixed Value of column for given term ID.
 */
function manage_issuem_issue_custom_column( $blank, $column_name, $term_id ) {

	$issue_meta = get_option( 'issuem_issue_' . $term_id . '_meta' );

	if ( $column_name == 'issue_order' ) {
		return get_term_meta( $term_id, 'issue_order', true );
	} elseif ( ! empty( $issue_meta[ $column_name ] ) ) {
		return $issue_meta[ $column_name ];
	} else {
		return '';
	}
}
add_filter( 'manage_issuem_issue_custom_column', 'manage_issuem_issue_custom_column', 10, 3 );


/**
 * Outputs HTML for new form fields in Issues
 *
 * @since 1.0.0
 */
function issuem_issue_taxonomy_add_form_fields() {
	?>

	<div class="form-field">
		<label for="issue_status"><?php esc_html_e( 'Issue Status', 'issuem' ); ?></label>
		<?php

			$issuem_statuses = get_issuem_issue_statuses();

			echo '<select name="issue_status" id="issue_status">';
			foreach ( $issuem_statuses as $key => $status ) {
				echo '<option value="' . esc_attr( $key ) . '" ' . selected( false, $key, false ) . '>' . esc_html( $status ) . '</option>';
			}
			echo '</select>';

		?>

	</div>

	<div class="form-field">
		<label for="issue_order"><?php esc_html_e( 'Issue Order', 'issuem' ); ?></label>
		<input type="text" name="issue_order" id="issue_order" />
	</div>

	<?php wp_nonce_field( 'issuem_issue_meta_save', 'issuem_issue_meta_save_field' ); ?>

	<?php
}
add_action( 'issuem_issue_add_form_fields', 'issuem_issue_taxonomy_add_form_fields' );


/**
 * Outputs HTML for IssueM Issue statuses
 *
 * @since 1.0.0
 *
 * @param string $select Currently selected option
 * @return string select HTML of available statuses
 */
function get_issuem_issue_statuses() {

	$statuses = apply_filters(
		'issuem_issue_statuses',
		array(
			'Draft'       => __( 'Draft', 'issuem' ),
			'Live'        => __( 'Live', 'issuem' ),
			'PDF Archive' => __(
				'PDF Archive',
				'issuem'
			),
		)
	);

	return $statuses;

}


add_action( 'admin_init', 'issuem_maybe_delete_issue_pdf' );

function issuem_maybe_delete_issue_pdf() {

	if ( !isset($_GET['remove_pdf_version'] ) ) {
		return;
	}

	$tag_id = isset( $_GET['tag_ID'] ) ? absint( $_GET['tag_ID'] ) : '';

	if ( !$tag_id ) {
		return;
	}

	$issue_meta = get_option( 'issuem_issue_' . $tag_id . '_meta' );

	wp_delete_attachment( $issue_meta['pdf_version'] );
	$issue_meta['pdf_version'] = '';
	update_option( 'issuem_issue_' . $tag_id . '_meta', $issue_meta );

	$url = admin_url('term.php?taxonomy=issuem_issue&tag_ID=') . $tag_id;

	wp_safe_redirect( $url );
	exit;

}

/**
 * Outputs HTML for new form fields in Issue (on Edit form)
 *
 * @since 1.0.0
 */
function issuem_issue_taxonomy_edit_form_fields( $tag, $taxonomy ) {

	$defaults   = array(
		'issue_status'      => '',
		'issue_order'       => '',
		'cover_image'       => '',
		'pdf_version'       => '',
		'external_link'     => '',
		'external_pdf_link' => '',
	);
	$issue_meta = get_option( 'issuem_issue_' . $tag->term_id . '_meta' );
	$issue_meta = wp_parse_args( $issue_meta, $defaults );

	?>

	<tr class="form-field">
		<th valign="top" scope="row"><?php esc_html_e( 'Issue Status', 'issuem' ); ?></th>
		<td>

			<?php

				$issuem_statuses = get_issuem_issue_statuses();

				echo '<select name="issue_status" id="issue_status">';
				foreach ( $issuem_statuses as $key => $status ) {
					echo '<option value="' . esc_attr( $key ) . '" ' . selected( $issue_meta['issue_status'], $key, false ) . '>' . esc_html( $status ) . '</option>';
				}
				echo '</select>';

			?>

		</td>
	</tr>

	<?php do_action( 'issuem_after_issue_status_setting', $issue_meta ); ?>

	<tr class="form-field">
		<th valign="top" scope="row"><?php esc_html_e( 'Issue Order', 'issuem' ); ?></th>
		<td><input type="text" name="issue_order" id="issue_order" value="<?php echo esc_attr( $issue_meta['issue_order'] ); ?>" /></td>
	</tr>

	<tr class="form-field">
		<th valign="top" scope="row"><?php esc_html_e( 'Cover Image', 'issuem' ); ?></th>
		<td>
			<p class="hide-if-no-js">
				<a title="Set Cover Image" href="javascript:;" id="set-cover-image">Set cover image</a>
			</p>

			<div id="cover-image-container" class="hidden">
				<img width="300" src="<?php echo isset( $issue_meta['cover_image'] ) ? esc_url( wp_get_attachment_url( $issue_meta['cover_image'] ) ) : ''; ?>" />
			</div>

			<p class="hide-if-no-js hidden">
				<a title="Remove Cover Image" href="javascript:;" id="remove-cover-image">Remove cover image</a>
			</p>

			<p id="cover-image-meta">
				<input type="hidden" id="cover-image" name="cover_image" value="<?php echo isset( $issue_meta['cover_image'] ) ? esc_attr( $issue_meta['cover_image'] ) : ''; ?>" />
				<input type="hidden" id="cover-image-title" name="cover-image-title" value="" />
				<input type="hidden" id="cover-image-alt" name="cover-image-alt" value="" />
			</p>
		</td>
	</tr>

	<tr class="form-field">
		<th valign="top" scope="row"><?php esc_html_e( 'External Issue Link', 'issuem' ); ?></th>
		<td><input type="text" name="external_link" id="external_link" value="<?php echo esc_attr( $issue_meta['external_link'] ); ?>" />
			<p class="description">Leave empty if you do not want your issue to link to an external source.</p>
		</td>
	</tr>

	<tr class="form-field">
		<th valign="top" scope="row"><?php esc_html_e( 'PDF Version', 'issuem' ); ?></th>
		<td>
			<input type="file" name="pdf_version" id="pdf_version" value="" />
			<?php

			if ( ! empty( $issue_meta['pdf_version'] ) ) {
				?>
				<p><a target="_blank" href="<?php echo esc_url( wp_get_attachment_url( $issue_meta['pdf_version'] ) ); ?>"> <?php esc_html_e( 'View PDF Version', 'issuem' ); ?></a></p>
				<p><a href="<?php echo esc_url( admin_url('term.php') ); ?>?taxonomy=issuem_issue&tag_ID=<?php echo absint( $tag->term_id ); ?>&remove_pdf_version=<?php echo esc_attr( $issue_meta['pdf_version'] ); ?>">
					<?php esc_html_e( 'Remove PDF Version', 'issuem' ); ?></a></p>

				<?php
			}

			echo esc_html( apply_filters( 'issuem_pdf_version', '', __( 'Issue-to-PDF Generated PDF', 'issuem' ), $tag ) );
			?>
		</td>
	</tr>

	<tr class="form-field">
		<th valign="top" scope="row"><?php esc_html_e( 'External PDF Link', 'issuem' ); ?></th>
		<td><input type="text" name="external_pdf_link" id="external_pdf_link" value="<?php echo esc_attr( $issue_meta['external_pdf_link'] ); ?>" />
			<p class="description">Leave empty if you do not want your PDF to link to an external source.</p>
		</td>
	</tr>

	<?php wp_nonce_field( 'issuem_issue_meta_save', 'issuem_issue_meta_save_field' ); ?>

	<?php
}
add_action( 'issuem_issue_edit_form_fields', 'issuem_issue_taxonomy_edit_form_fields', 10, 2 );


/**
 * Saves form fields for Issues taxonomy
 *
 * @since 1.0.0
 * @todo misnamed originaly, should reallly be issuem_article_categories
 *
 * @param int $term_id Term ID
 * @param int $taxonomy_id Taxonomy ID
 */
function save_issuem_issue_meta( $term_id, $taxonomy_id ) {

	if ( ! isset( $_POST['issuem_issue_meta_save_field'] ) ) {
		return;
	}

	if ( ! wp_verify_nonce( sanitize_text_field( $_POST['issuem_issue_meta_save_field'] ), 'issuem_issue_meta_save' ) ) {
		return;
	}

	$issue_meta = get_option( 'issuem_issue_' . $term_id . '_meta' );

	if ( isset( $_POST['issue_status'] ) ) {
		$issue_meta['issue_status'] = sanitize_text_field( $_POST['issue_status'] );
	}

	if ( isset( $_POST['issue_order'] ) ) {
		$issue_order               = sanitize_text_field( $_POST['issue_order'] );
		$issue_meta['issue_order'] = $issue_order;
		update_term_meta( $term_id, 'issue_order', $issue_order );
	}

	if ( isset( $_POST['cover_image'] ) ) {
		$issue_meta['cover_image'] = sanitize_text_field( $_POST['cover_image'] );
	}

	if ( ! empty( $_FILES['pdf_version']['name'] ) ) {

		require_once ABSPATH . 'wp-admin/includes/admin.php';
		$id = media_handle_upload( 'pdf_version', 0 ); //post id of Client Files page

		if ( is_wp_error( $id ) ) {
			$errors['upload_error'] = $id;
			$id                     = false;
		}

		$issue_meta['pdf_version'] = $id;
	}

	$issue_meta['external_link']     = ! empty( $_POST['external_link'] ) ? sanitize_text_field( $_POST['external_link'] ) : '';
	$issue_meta['external_pdf_link'] = ! empty( $_POST['external_pdf_link'] ) ? sanitize_text_field( $_POST['external_pdf_link'] ) : '';

	update_option( 'issuem_issue_' . $term_id . '_meta', $issue_meta );
}
add_action( 'created_issuem_issue', 'save_issuem_issue_meta', 10, 2 );
add_action( 'edited_issuem_issue', 'save_issuem_issue_meta', 10, 2 );


/**
 * Outputs array of Issue Terms IDs for IssueM Issue statuses set to Draft
 *
 * @since 1.0.0
 *
 * @return array Draft Issues
 */
function get_issuem_draft_issues() {
	global $wpdb;

	$term_ids = array();

	$term_option_names = $wpdb->get_col( 'SELECT option_name FROM ' . $wpdb->options . ' WHERE option_name LIKE "issuem_issue_%_meta" AND option_value LIKE "%Draft%"' );

	foreach ( $term_option_names as $name ) {
		if ( preg_match( '/issuem_issue_(\d+)_meta/', $name, $matches ) ) {
			$term_ids[] = $matches[1];
		}
	}

	return apply_filters( 'issuem_draft_issue_ids', $term_ids );
}



add_action( 'admin_init', 'issuem_convert_issue_order_to_term_meta' );

function issuem_convert_issue_order_to_term_meta() {
	$settings = get_issuem_settings();

	if ( $settings['issue_order_converted'] ) {
		return;
	}

	$issues = get_terms(
		array(
			'taxonomy'   => 'issuem_issue',
			'hide_empty' => false,
		)
	);

	if ( count( $issues ) < 1 ) {
		return;
	}

	foreach ( $issues as $issue ) {

		$issue_meta  = get_option( 'issuem_issue_' . $issue->term_id . '_meta' );
		$issue_order = isset( $issue_meta['issue_order'] ) ? $issue_meta['issue_order'] : '';
		update_term_meta( $issue->term_id, 'issue_order', $issue_order );
	}

	$settings['issue_order_converted'] = true;
	update_option( 'issuem', $settings );
}