Mis puudutab kiirprotot\u00fc\u00fcpe ja WordPressi, siis oleme siiani teinud kahte asja:<\/p>\n
Praegusel hetkel oleme teinud piisavalt t\u00f6\u00f6d, et \u00f5igustada koodi \u00fcmberkujundamise alustamist. See t\u00e4hendab, et hakkame protot\u00fc\u00fcpi koodiks teisendama. Kuid see on midagi, mida tuleb teha kahes etapis.<\/p>\n
Esiteks tutvustame lihtsalt klasse, mis esindavad eelmise postituse diagramme ja mis h\u00f5lmavad iga projekti vastutust.<\/p>\n
P\u00e4rast seda vaatame koodi korraldamist nimeruumidesse ja pakettidesse. Enne kui saame seda teha, peame siiski veenduma, et kood on objektorienteeritud ja t\u00f6\u00f6tab. Nii et see selles postituses juhtub.<\/p>\n
Kui olete varasemaid postitusi lugenud, siis pange t\u00e4hele, et kavatsen j\u00e4rgida eelmises postituses visandatud korraldust. Loomulikult ei pea te seda konkreetset disaini j\u00e4rgima.<\/p>\n
Kui kasutate allika juhtimist, soovitan siin luua p\u00f5hiharu<\/a> haru (kui kasutate Giti), et saaksite oma t\u00f6\u00f6d teha ilma koodi stabiilset versiooni karmistamata.<\/p>\n See j\u00e4\u00e4b seeriast veidi kaugemale, nii et kui te ei kasuta allika juhtimist, \u00e4rge muretsege. Kui olete, valin selle filiaali nimeks arendada .<\/strong> Kui olen kindel, et see toimib, \u00fchendan selle tagasi masteriks\u00a0 .<\/strong><\/p>\n Eile visandatud t\u00f6\u00f6 kohaselt loon kaks klassi:<\/p>\n Koodi taaskasutatakse osaliselt sellest, mida oleme juba n\u00e4inud, nagu n\u00e4ete j\u00e4rgmises koodis.<\/p>\n Esiteks meie metakast<\/a> :<\/p>\n Ja j\u00e4rgmiseks meie ekraan<\/a> :<\/p>\n Et metaboksi koodis metaboksi koodis me eksplitsiitselt instantseerime kuva, et saaksime vajadusel kutsuda seda kuvamismeetodiks.<\/p>\n Teine v\u00f5imalus oleks instantseerida kaks objekti eraldi ja seej\u00e4rel sisestada ekraan konstruktoris\u00fcsti v\u00f5i muu sarnase kaudu metakasti. Seda tuleks teha kolmanda osapoole klassis.<\/p>\n Selle eelised tulenevad kahe klassi lahti\u00fchendamisest. V\u00f5ib-olla vaatame j\u00e4rgmises postituses \u00fcle, kuidas seda teha.<\/p>\n P\u00e4rast seda peame edasi minema ja m\u00e4\u00e4ratlema klassi, mis vastutab s\u00f5numite kuvamise eest metaboksi kuva kontekstis. Seda me nimetame Post Messengeriks<\/a> :<\/p>\n Pange t\u00e4hele, et Post Messenger viitab ka postitusp\u00e4ringule<\/a>. See on klass, kus toimub side andmebaasiga. Lisasin ka m\u00f5ned abifunktsioonid, et muuta vaatamiskood veidi lihtsamaks, nagu me kohe n\u00e4eme.<\/p>\n Ja see ongi p\u00f5hiklasside jaoks. Muidugi tuleb veel vaadetest r\u00e4\u00e4kida.<\/p>\n Vaated vastutavad HTML-i renderdamise eest metakasti kontekstis. Mulle ei meeldi PHP kontekstis HTML-i kirjutamine (ega ka PHP segamine HTML-i kontekstis, kuid see on selle projekti puhul paratamatu).<\/p>\n Selle lihtsamaks muutmiseks on m\u00f5ned suurep\u00e4rased malliprojektid, kuid ma kaldun k\u00f5rvale. Igatahes m\u00e4rkad, et post-list.php<\/strong> failis on viited abifunktsioonidele klassis Post Query. Selle eesm\u00e4rk on olla kindel, et ma ei paljasta liiga palju omadusi ega riku Demeteri seadust.<\/p>\n Vaatame k\u00f5igepealt seda faili, kuna see on k\u00f5ige keerulisem<\/a> :<\/p>\n See n\u00e4eb v\u00e4lja nagu standardne WordPressi kood, kuid pidage meeles, et kuna seda faili kutsutakse v\u00e4lja Post Messengeris<\/strong>, viitab see p\u00e4ringule kui p\u00e4ringule, mille see klass \u00fcmbritseb.<\/p>\n Kaks viimast faili on \u00fcsna sirgjoonelised. \u00dcks neist annab kirjelduse<\/a> :<\/p>\n Teine annab s\u00f5numi, kui postitusi pole<\/a> :<\/p>\n Peale selle on p\u00f5hifunktsioonid tehtud.<\/p>\n Viimane asi, mida peame tegema, on pistikprogrammi k\u00e4ivitamine. Selleks muudame peamise pistikprogrammi faili koodi nii, et see n\u00e4eks v\u00e4lja j\u00e4rgmine<\/a> :<\/p>\n See haakub WordPressiga, loob meie pistikprogrammi ja paneb selle siis liikuma. Kui k\u00e4ivitate selle WordPressi installimise ajal, peaks see v\u00e4lja n\u00e4gema t\u00e4pselt nii, nagu see oli esimese versiooni ajal.<\/p>\n Ainus erinevus on see, et meil on n\u00fc\u00fcd asjad korraldatud klasside kaupa, mitte \u00fcksikute funktsioonide kaupa.<\/p>\n Esiteks on siin v\u00f5imalusi \u00fcmberkujundamiseks, mis v\u00e4hendaks lahtisidumist veelgi (nt erinevat t\u00fc\u00fcpi s\u00f5ltuvuse s\u00fcstimine<\/a> jne), kuid selle seeria eesm\u00e4rk ei ole seda h\u00f5lmata.<\/p>\n Selle asemel on m\u00f5te n\u00e4ha paljude protseduuriliste funktsioonide poolt kirjutatud pistikprogramme ja seej\u00e4rel jagada need kontseptuaalsemateks klassideks, mis h\u00f5lmavad nende kohustusi.<\/p>\n Teiseks, kui vaatate projekti selle versiooni hoidlas oleva l\u00e4htekoodi \u00fcle, n\u00e4ete, et tutvustasin ka faili composer.json. Seda selleks, et saaksin koodi kirjutamisel \u00e4ra kasutada PHP CodeSnifferi<\/a> ja WordPressi kodeerimisstandardeid<\/a>.<\/p>\n Sarja viimases osas vaatame l\u00e4bi nimevahed<\/a> ja korraldame failid \u00fcmber. Kui aega lubab, lisame automaatlaaduri, et me ei peaks oma pistikprogrammi faili \u00fclaossa faile k\u00e4sitsi lisama.<\/p>\n L\u00f5puks \u00fchendasin selle koodi p\u00f5hikoodiga ja m\u00e4rgistasin selle kui 0.2.1<\/a> (kuna pidin tegema v\u00e4ikese kiirparanduse), kuna see on veel pooleli.<\/p>\nKoodi kirjutamine<\/h3>\n
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Kood<\/h4>\n
<?php\n\/**\n * Registers the Meta Box with WordPress.\n *\n * @author Tom McFarlin\n * @since 0.2.0\n *\/\n\n\/**\n * Registers the Meta Box with WordPress. Defines the ID, title, display function,\n * and the post type on which it will live.\n *\n * @author Tom McFarlin\n * @since 0.2.0\n *\/\nclass Meta_Box {\n\n \/**\n * A reference to the class that will display the contents in the meta box.\n *\n * @access private\n * @var Meta_Box_Display\n *\/\n private $meta_box_display;\n\n \/**\n * Instantiates the class by setting its property equal to a reference to its display.\n *\/\n public function __construct() {\n $this->meta_box_display = new Meta_Box_Display();\n }\n\n \/**\n * The function responsible for hooking into the WordPress API.\n *\/\n public function init() {\n\n add_meta_box(\n 'three-recent-posts',\n 'Three Recent Posts',\n array( $this->meta_box_display, 'display' ),\n 'post',\n 'side'\n );\n }\n}\n<\/code><\/pre>\n<?php\n\/**\n * Defines the display for the meta box.\n *\n * @author Tom McFarlin\n * @since 0.2.0\n *\/\n\n\/**\n * Defines the display for the meta box that will render the content in the\n * context of its meta box.\n *\n * @author Tom McFarlin\n * @since 0.2.0\n *\/\nclass Meta_Box_Display {\n\n \/**\n * A reference to the class that will display the contents in the meta box.\n *\n * @access private\n * @var Post_Messenger\n *\/\n private $messenger;\n\n \/**\n * Instantiates the object by setting a property equal to that of the class\n * responsible for rendering the messages from the post query.\n *\/\n public function __construct() {\n $this->messenger = new Post_Messenger( $this );\n }\n\n \/**\n * If there are posts to display, renders them in the metabox. Otherwise, displays\n * a note that there are no posts to display.\n *\/\n public function display( $message) {\n $this->messenger->get_message();\n }\n}\n<\/code><\/pre>\n<?php\n\/**\n * Display content for the meta box when requested.\n *\n * @author Tom McFarlin\n * @since 0.2.0\n *\/\n\n\/**\n * Retrieves information from the class responsible for querying the database and\n * renders it in the context of our meta box when called via the Meta Box Display.\n *\n * @author Tom McFarlin\n * @since 0.2.0\n *\/\nclass Post_Messenger {\n\n \/**\n * A reference to the query resonsible for retrieving post information from\n * the database.\n *\n * @access private\n * @var WP_Query\n *\/\n private $query;\n\n \/**\n * A reference to the message that's displayed in the view of the\n * meta box.\n *\n * @access private\n *\/\n private $message;\n\n \/**\n * Instantiates the class by setting a reference to the query.\n *\/\n public function __construct() {\n $this->query = new Post_Query();\n }\n\n \/**\n * Retrieves the content to be displayed in the meta box.\n *\/\n public function get_message() {\n\n $this->get_description();\n\n if ($this->query->has_posts()) {\n $this->get_post_message();\n } else {\n $this->get_no_posts_message();\n }\n }\n\n \/**\n * Displays the description of the content of the meta box.\n *\n * @access private\n *\/\n private function get_post_message() {\n include_once 'post-list.php';\n }\n\n \/**\n * Displays the description of the content of the meta box.\n *\n * @access private\n *\/\n private function get_description() {\n include_once 'message-description.php';\n }\n\n \/**\n * Displays a message of there are no recent posts.\n *\n * @access private\n *\/\n private function get_no_posts_message() {\n include_once 'no-post-list.php';\n }\n}\n<\/code><\/pre>\n<?php\n\/**\n * Queries the database for three most recent posts.\n *\n * @author Tom McFarlin\n * @since 0.2.0\n *\/\n\n\/**\n * Queries the database for three most recent posts. Returns the query to the\n * caller so that it can be interrogates for posts or not.\n *\n * @author Tom McFarlin\n * @since 0.2.0\n *\/\nclass Post_Query {\n\n \/**\n * A reference to the WP_Query this class wraps.\n *\n * @access private\n * @var WP_Query\n *\/\n private $query;\n\n \/**\n * Instantiates the class by preparing instance data and executing the\n * query so the display can render the contents.\n *\/\n public function __construct() {\n\n $this->query = null;\n $this->get_posts();\n }\n\n \/**\n * Executes the query for returning the post recent posts ordered by date.\n *\n * @access private\n *\/\n private function get_posts() {\n\n $args = array(\n 'post_type' => 'post',\n 'post_status' => 'publish',\n 'orderby' => 'date',\n 'order' => 'desc',\n );\n $this->query = new WP_Query( $args );\n\n return $this->query;\n }\n\n \/**\n * A helper function to determine if the query has any posts.\n *\/\n public function has_posts() {\n return! $this->query->have_posts();\n }\n\n \/**\n * A helper function for retrieving the next post in the list of\n * posts\n *\/\n public function the_post() {\n return $this->query->the_post();\n }\n}\n<\/code><\/pre>\nVaated<\/h4>\n
<ol>\n <?php while ($this->query->has_posts()) { ?>\n <?php $this->query->the_post(); ?>\n <li>\n <a href=\"<?php get_the_permalink(); ?>\" target=\"_blank\">\n <?php echo get_the_title(); ?>\n <\/a>\n <\/li>\n <?php } ?>\n<\/ol><\/code><\/pre>\n<p>\n <span class=\"description\">\n Displays up to the three most recent posts.\n <\/span><!-- .description -->\n<\/p><\/code><\/pre>\n<p>There are no recent posts.<\/p><\/code><\/pre>\nPlugina alglaadimine<\/h3>\n
<?php\n\/**\n * Three Recent Posts\n *\n * @package TRP\n * @author Tom McFarlin\n * @copyright 2017 Tom McFarlin\n * @license MIT\n *\n * @wordpress-plugin\n * Plugin Name: Three Recent Posts\n * Plugin URI: https:\/\/tommcfarlin.com\/three-recent-posts\/\n * Description: Displays the three mot recent posts in your post editor screen.\n * Version: 0.2.0\n * Author: Tom McFarlin\n * Author URI: https:\/\/tommcfarlin.com\n * Text Domain: three-recent-posts\n * License: GPL\n * License URI: http:\/\/www.gnu.org\/licenses\/gpl-3.0.txt\n *\/\n\ninclude 'class-meta-box.php';\ninclude 'class-meta-box-display.php';\ninclude 'class-post-messenger.php';\ninclude 'class-post-query.php';\n\nadd_action( 'add_meta_boxes', 'trp_start' );\n\/**\n * Starts the plugin.\n *\/\nfunction trp_start() {\n\n $meta_box = new Meta_Box();\n $meta_box->init();\n}\n<\/code><\/pre>\nM\u00e4rkmed<\/h2>\n
Sarja postitused<\/h2>\n
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