commit e1f0aa5ed8859f265b13407dbb387e2ab99caaa0 Author: Robbert de Kuiper Date: Thu Mar 30 16:27:22 2017 +0200 First commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..afbd55f --- /dev/null +++ b/.gitignore @@ -0,0 +1,19 @@ +### OSX ### +*.DS_Store +.AppleDouble +.LSOverride + + +# Files that might appear in the root of a volume +.DocumentRevisions-V100 +.fseventsd +.Spotlight-V100 +.TemporaryItems +.Trashes +.VolumeIcon.icns +.com.apple.timemachine.donotpresent + +# Directories potentially created on remote AFP share +.AppleDB +.AppleDesktop +.apdisk \ No newline at end of file diff --git a/LICENSE.txt b/LICENSE.txt new file mode 100755 index 0000000..ecbc059 --- /dev/null +++ b/LICENSE.txt @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Lesser General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. And you must show them these terms so they know their +rights. + + We protect your rights with two steps: (1) copyright the software, and +(2) offer you this license which gives you legal permission to copy, +distribute and/or modify the software. + + Also, for each author's protection and ours, we want to make certain +that everyone understands that there is no warranty for this free +software. If the software is modified by someone else and passed on, we +want its recipients to know that what they have is not the original, so +that any problems introduced by others will not reflect on the original +authors' reputations. + + Finally, any free program is threatened constantly by software +patents. We wish to avoid the danger that redistributors of a free +program will individually obtain patent licenses, in effect making the +program proprietary. To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. 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For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, +REPAIR OR CORRECTION. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. \ No newline at end of file diff --git a/README.md b/README.md new file mode 100755 index 0000000..e392a1c --- /dev/null +++ b/README.md @@ -0,0 +1,36 @@ +# WordPress Ajax Filter Posts + +## Description + +A WordPress plugin to filter posts with taxonomies terms and load more posts via Ajax. +You can add posts and filters via a **shortcode** on any page. + +``` +[ajax_filter_posts post_type='recipe' tax="meal_type, food_type, diet_type" posts_per_page="12"] + +``` + +This plugins uses no dependencies. + +## Parameters + +- **post_type** + Post type to show. Default post. + +- **tax** + A comma seperated list of taxonomies to filter the post by. Default post_term. + +- **post_per_page** + Numbers of maximum posts to retreive at a time. + +## Motivation + +I build a lot of sites that needed a functionality like this and decided to create a plugin for it. Although there are a lot of plugins doing something like this, they usually add a lot of bloat and is very user centered. This is for a developer easier to implement, update and keeps te code cleaner. + +## Installation + +Add this folder to your plugins or mu-plugins folder. + +## License + +GNU GENERAL PUBLIC LICENSE \ No newline at end of file diff --git a/ajax-filter-posts.php b/ajax-filter-posts.php new file mode 100755 index 0000000..3e914bf --- /dev/null +++ b/ajax-filter-posts.php @@ -0,0 +1,53 @@ + -1) { + queryParams.tax[tax].splice( queryParams.tax[tax].indexOf(term) , 1 ); + } + } + } + + /** + * Get new posts via Ajax + * + * Retrieve a new set of posts based on the created query + * + * @return string server side generated HTML + */ + function getAJAXPosts(args) { + + var content = container.querySelector('.ajax-posts__posts'); + var status = container.querySelector('.ajax-posts__status'); + + // Set status to querying + container.classList.add('is-waiting'); + + var request = new XMLHttpRequest(); + request.open('POST', filterPosts.ajaxUrl, true); + request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); + request.timeout = 2000; // time in milliseconds + + request.onload = function() { + + //remove load more button + var loadMoreButton = content.querySelector('.js-load-more'); + if (loadMoreButton) { + content.removeChild(loadMoreButton); + } + + var response = JSON.parse(this.response).data; + if (this.status === 200) { + if (args.reset){ + content.innerHTML = response.content; + } else { + content.innerHTML += response.content; + } + } + else { + status.innerHTML = response.message; + } + // Resolve status + container.classList.remove('is-waiting'); + }; + + request.ontimeout = function() { + status.innerHTML = filterPosts.timeoutMessage; + } + + request.send(objectToQueryString({ + action: 'process_filter_change', + nonce: filterPosts.nonce, + params: queryParams, + })); + } + + /** + * Helper function for event delegation + * + * To add event listeners on dynamic content, you can add a listener + * on thewrapping container, find the dom-node that triggered + * the event and check if that node mach our + * + * @param NodeElement el wrapping element for the dynamic content + * @param string eventName type of event, e.g. click, mouseenter, etc + * @param string selector selector criteria of the element where the action should be on + * @param Function fn callback funciton + * @return Function The callback + */ + function on(el, eventName, selector, fn) { + var element = el; + + element.addEventListener(eventName, function(event) { + var possibleTargets = element.querySelectorAll(selector); + + var target = event.target; + + for (var i = 0, l = possibleTargets.length; i < l; i++) { + var el = target; + var p = possibleTargets[i]; + + while(el && el !== element) { + if (el === p) { + return fn.call(p, event); + } + + el = el.parentNode; + } + } + }); + } + + /** + * Convert an deep object to a url parameter list + * + * Boiled down from jQuery + * + * WordPress Ajax post request doesn't accept JSON only form-urlencoded! + * Took me a while to get... + * Although seems not to be totally true: + * http://wordpress.stackexchange.com/questions/177554/allowing-admin-ajax-php-to-receive-application-json-instead-of-x-www-form-url + * + */ + function objectToQueryString(a) { + var prefix, s, add, name, r20, output; + s = []; + r20 = /%20/g; + add = function (key, value) { + // If value is a function, invoke it and return its value + value = ( typeof value == 'function' ) ? value() : ( value == null ? "" : value ); + s[ s.length ] = encodeURIComponent(key) + "=" + encodeURIComponent(value); + }; + if (a instanceof Array) { + for (name in a) { + add(name, a[name]); + } + } else { + for (prefix in a) { + buildParams(prefix, a[ prefix ], add); + } + } + output = s.join("&").replace(r20, "+"); + return output; + }; + + /** + * Helper function to create URL parameters of deep object + * + * Boiled down from jQuery + */ + function buildParams(prefix, obj, add) { + var name, i, l, rbracket; + rbracket = /\[\]$/; + if (obj instanceof Array) { + for (i = 0, l = obj.length; i < l; i++) { + if (rbracket.test(prefix)) { + add(prefix, obj[i]); + } else { + buildParams(prefix + "[" + ( typeof obj[i] === "object" ? i : "" ) + "]", obj[i], add); + } + } + } else if (typeof obj == "object") { + // Serialize object item. + for (name in obj) { + buildParams(prefix + "[" + name + "]", obj[ name ], add); + } + } else { + // Serialize scalar item. + add(prefix, obj); + } + } + + init(); + +}()); \ No newline at end of file diff --git a/class-ajax-filter-posts.php b/class-ajax-filter-posts.php new file mode 100755 index 0000000..720524a --- /dev/null +++ b/class-ajax-filter-posts.php @@ -0,0 +1,220 @@ + + */ +class Ajax_Filter_Posts { + + /** + * The unique identifier of this plugin. + * + * @var string $plugin_name The string used to uniquely identify this plugin. + */ + protected $plugin_name; + + /** + * The current version of the plugin. + * + * @var string $version The current version of the plugin. + */ + protected $version; + + /** + * Define the core functionality of the plugin. + * + * Set the plugin name and the plugin version that can be used throughout the plugin. + * Load the dependencies, define the locale, and set the hooks for the admin area and + * the public-facing side of the site. + * + */ + public function __construct() { + + $this->plugin_name = 'ajax-filter-posts'; + $this->version = '1.0.0'; + + add_action( 'wp_enqueue_scripts', [$this,'add_scripts'] ); + add_action('wp_ajax_process_filter_change', [$this, 'process_filter_change']); + add_action('wp_ajax_nopriv_process_filter_change', [$this, 'process_filter_change']); + add_shortcode( 'ajax_filter_posts', [$this, 'create_shortcode']); + } + + /** + * Load the required assets for this plugin. + * + */ + public function add_scripts() { + wp_enqueue_script( 'ajax-filter', plugins_url('/assets/js/ajax-filter-posts.js', __FILE__), [], '', true ); + wp_enqueue_style( 'ajax-filter', plugins_url('/assets/css/ajax-filter-posts.css', __FILE__), []); + wp_localize_script( 'ajax-filter', 'filterPosts', array( + 'nonce' => wp_create_nonce( 'filter-posts-nonce' ), + 'ajaxUrl' => admin_url( 'admin-ajax.php' ), + 'timeoutMessage' => __('Something went wrong, please try again later.', $this->plugin_name), + ) + ); + } + + public function create_shortcode($atts) { + + $attributes = shortcode_atts( array( + 'post_type'=> 'post', + 'tax' => ['post_tag'], + 'posts_per_page' => 12, // How many posts per page, + ), $atts, $this->plugin_name ); + + $filterlists = $this->get_filterlist($attributes['tax']); + + $query = new WP_Query([ + 'post_type' => $attributes['post_type'], + 'posts_per_page' => $attributes['posts_per_page'], + ]); + + return include(plugin_dir_path( __FILE__ ) . 'templates/base.php'); + } + + protected function get_filterlist($taxonomies) { + $filterlists = explode(',', $taxonomies); + $filterlists = array_map('trim', $filterlists); + $filterlists = array_filter($filterlists, 'taxonomy_exists'); + $filterlists = $this->get_termlist($filterlists); + return $filterlists; + } + + protected function get_termlist($taxonomies) { + $list = []; + + foreach ($taxonomies as $taxonomy) { + $terms = get_terms($taxonomy); + if (!empty($terms)) { + $list[] = [ + 'name' => get_taxonomy($taxonomy)->labels->singular_name, + 'filters' => $terms, + ]; + } + } + + return $list; + } + + public function process_filter_change() { + + check_ajax_referer( 'filter-posts-nonce', 'nonce' ); + + $post_type = sanitize_text_field($_POST['params']['postType']); + $tax = $this->get_tax_query_vars($_POST['params']['tax']); + $page = intval($_POST['params']['page']); + $quantity = intval($_POST['params']['quantity']); + + $args = [ + 'paged' => $page, + 'post_type' => $post_type, + 'posts_per_page' => $quantity, + 'tax_query' => $tax + ]; + + $response = $this->get_filter_posts($args, $response); + + if ($response) { + wp_send_json_success($response); + } else { + wp_send_json_error(__('Oops, something went wrong', $this->plugin_name)); + } + die(); + } + + /** + * Converts the queried page to a real page + * + * @param Object $query WP Query + * @return Integer Current page + */ + private function get_page_number($query){ + $query_page = $query->get( 'paged' ); + return $query_page == 0 ? 1 : $query_page; + } + + /** + * Check if the queried page is the last page of the query + * + * @param Object $query WP Query + * @return Boolean true if is last page + */ + private function is_last_page($query) { + return $query->get( 'paged' ) >= $query->max_num_pages; + } + + protected function get_tax_query_vars($taxonomies) { + $tax_query = []; + + foreach ($taxonomies as $taxonomy => $terms) { + $taxonomy = sanitize_text_field($taxonomy); + if (taxonomy_exists($taxonomy)) { + $valid_terms = $this->get_valid_terms($terms, $taxonomy); + if ($valid_terms) { + $term_query = [ + 'taxonomy' => $taxonomy, + 'field' => 'slug', + 'terms' => $valid_terms, + ]; + + $tax_query[] = $term_query; + + } + } + } + + if( count($tax_query) > 1 ) { + $tax_query[] = ['relation' => 'OR']; + } + return $tax_query; + } + + protected function get_valid_terms($terms, $tax) { + $valid_terms = []; + + foreach ($terms as $term) { + $term = sanitize_text_field($term); + if (term_exists($term,$tax)) { + $valid_terms[] = $term; + } + } + return $valid_terms; + } + + /** + * Set up filtered query + */ + public function get_filter_posts($args, $response) { + + $query = new WP_Query($args); + + ob_start(); + include(plugin_dir_path( __FILE__ ) . 'templates/partials/loop.php'); ; + $response['content'] = ob_get_clean(); + $response['found'] = $query->found_posts; + return $response; + } +} \ No newline at end of file diff --git a/index.php b/index.php new file mode 100755 index 0000000..e71af0e --- /dev/null +++ b/index.php @@ -0,0 +1 @@ +" data-quantity="" class="js-container-async ajax-posts"> + + +
+
+ +
+ + \ No newline at end of file diff --git a/templates/partials/filters.php b/templates/partials/filters.php new file mode 100644 index 0000000..473cb87 --- /dev/null +++ b/templates/partials/filters.php @@ -0,0 +1,12 @@ + +

+ + \ No newline at end of file diff --git a/templates/partials/loop.php b/templates/partials/loop.php new file mode 100644 index 0000000..57d701a --- /dev/null +++ b/templates/partials/loop.php @@ -0,0 +1,24 @@ +have_posts() ) : ?> + have_posts() ): $query->the_post();?> +
+ +
+ + is_last_page($query)) : ?> + + + +
+ + +

plugin_name), strtolower(get_post_type_object($query->query['post_type'])->labels->name)); ?>

+

reset them all.', $this->plugin_name), 'href="#" class="js-reset-filters"'); ?>

+
+