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1 <?php |
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2 /** |
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3 * Server-side rendering of the `core/rss` block. |
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4 * |
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5 * @package WordPress |
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6 */ |
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7 |
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8 /** |
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9 * Renders the `core/rss` block on server. |
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10 * |
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11 * @param array $attributes The block attributes. |
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12 * |
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13 * @return string Returns the block content with received rss items. |
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14 */ |
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15 function render_block_core_rss( $attributes ) { |
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16 $rss = fetch_feed( $attributes['feedURL'] ); |
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17 |
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18 if ( is_wp_error( $rss ) ) { |
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19 return '<div class="components-placeholder"><div class="notice notice-error"><strong>' . __( 'RSS Error:' ) . '</strong> ' . $rss->get_error_message() . '</div></div>'; |
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20 } |
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21 |
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22 if ( ! $rss->get_item_quantity() ) { |
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23 // PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks. |
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24 $rss->__destruct(); |
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25 unset( $rss ); |
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26 |
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27 return '<div class="components-placeholder"><div class="notice notice-error">' . __( 'An error has occurred, which probably means the feed is down. Try again later.' ) . '</div></div>'; |
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28 } |
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29 |
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30 $rss_items = $rss->get_items( 0, $attributes['itemsToShow'] ); |
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31 $list_items = ''; |
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32 foreach ( $rss_items as $item ) { |
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33 $title = esc_html( trim( strip_tags( $item->get_title() ) ) ); |
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34 if ( empty( $title ) ) { |
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35 $title = __( '(Untitled)' ); |
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36 } |
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37 $link = $item->get_link(); |
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38 $link = esc_url( $link ); |
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39 if ( $link ) { |
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40 $title = "<a href='{$link}'>{$title}</a>"; |
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41 } |
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42 $title = "<div class='wp-block-rss__item-title'>{$title}</div>"; |
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43 |
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44 $date = ''; |
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45 if ( $attributes['displayDate'] ) { |
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46 $date = $item->get_date( 'U' ); |
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47 |
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48 if ( $date ) { |
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49 $date = sprintf( |
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50 '<time datetime="%1$s" class="wp-block-rss__item-publish-date">%2$s</time> ', |
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51 date_i18n( get_option( 'c' ), $date ), |
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52 date_i18n( get_option( 'date_format' ), $date ) |
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53 ); |
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54 } |
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55 } |
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56 |
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57 $author = ''; |
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58 if ( $attributes['displayAuthor'] ) { |
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59 $author = $item->get_author(); |
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60 if ( is_object( $author ) ) { |
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61 $author = $author->get_name(); |
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62 $author = '<span class="wp-block-rss__item-author">' . __( 'by' ) . ' ' . esc_html( strip_tags( $author ) ) . '</span>'; |
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63 } |
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64 } |
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65 |
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66 $excerpt = ''; |
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67 if ( $attributes['displayExcerpt'] ) { |
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68 $excerpt = html_entity_decode( $item->get_description(), ENT_QUOTES, get_option( 'blog_charset' ) ); |
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69 $excerpt = esc_attr( wp_trim_words( $excerpt, $attributes['excerptLength'], ' […]' ) ); |
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70 |
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71 // Change existing [...] to […]. |
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72 if ( '[...]' == substr( $excerpt, -5 ) ) { |
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73 $excerpt = substr( $excerpt, 0, -5 ) . '[…]'; |
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74 } |
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75 |
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76 $excerpt = '<div class="wp-block-rss__item-excerpt">' . esc_html( $excerpt ) . '</div>'; |
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77 } |
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78 |
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79 $list_items .= "<li class='wp-block-rss__item'>{$title}{$date}{$author}{$excerpt}</li>"; |
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80 } |
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81 |
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82 $classes = 'grid' === $attributes['blockLayout'] ? ' is-grid columns-' . $attributes['columns'] : ''; |
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83 $list_items_markup = "<ul class='wp-block-rss{$classes}'>{$list_items}</ul>"; |
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84 |
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85 // PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks. |
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86 $rss->__destruct(); |
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87 unset( $rss ); |
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88 |
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89 return $list_items_markup; |
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90 } |
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91 |
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92 /** |
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93 * Registers the `core/rss` block on server. |
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94 */ |
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95 function register_block_core_rss() { |
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96 register_block_type( 'core/rss', |
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97 array( |
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98 'attributes' => array( |
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99 'columns' => array( |
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100 'type' => 'number', |
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101 'default' => 2, |
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102 ), |
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103 'blockLayout' => array( |
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104 'type' => 'string', |
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105 'default' => 'list', |
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106 ), |
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107 'feedURL' => array( |
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108 'type' => 'string', |
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109 'default' => '', |
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110 ), |
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111 'itemsToShow' => array( |
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112 'type' => 'number', |
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113 'default' => 5, |
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114 ), |
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115 'displayExcerpt' => array( |
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116 'type' => 'boolean', |
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117 'default' => false, |
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118 ), |
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119 'displayAuthor' => array( |
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120 'type' => 'boolean', |
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121 'default' => false, |
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122 ), |
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123 'displayDate' => array( |
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124 'type' => 'boolean', |
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125 'default' => false, |
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126 ), |
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127 'excerptLength' => array( |
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128 'type' => 'number', |
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129 'default' => 55, |
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130 ), |
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131 ), |
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132 'render_callback' => 'render_block_core_rss', |
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133 ) |
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134 ); |
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135 } |
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136 |
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137 add_action( 'init', 'register_block_core_rss' ); |