First Commit

Author: tim-field

Dispatch.php

@@ -0,0 +1,88 @@
+<?php
+
+namespace TheFold\WordPress;
+
+class Dispatch {
+
+    function __construct(array $url_callbacks, $priority = 5) {
+
+        add_filter('rewrite_rules_array', function($rules) use ($url_callbacks) {
+
+            foreach(array_keys($url_callbacks) as $look_for_in_url) {
+
+                $newRule = ['^'.trim($look_for_in_url,'/').'/?$' => 'index.php?'.$this->query_var_name($look_for_in_url).'=1'];
+                $rules = $newRule + $rules;
+            }
+
+            return $rules;
+        });
+
+        add_filter('query_vars', function($qvars) use ($url_callbacks) {
+            
+            foreach(array_keys($url_callbacks) as $look_for_in_url) {
+                
+                $var = $this->query_var_name($look_for_in_url);
+                $qvars[] = $var; 
+            }
+            return $qvars;
+        });
+        
+        add_action( 'template_redirect', function() use ($url_callbacks) {
+
+            global $wp_query;
+
+            foreach($url_callbacks as $url_key => $callback) {
+
+                if ( $wp_query->get( $this->query_var_name($url_key) ) ){
+
+                    $wp_query->is_home = false;
+
+                    $params = null;
+
+                    preg_match('#'.trim($url_key,'/').'#',$_SERVER['REQUEST_URI'],$params);
+
+                    $res = call_user_func_array($callback,$params);
+
+                    if($res === false)
+                        $this->send_404();
+                    else{
+                        exit();
+                    }
+                }
+            }
+        }, get_option('url_access_priority',$priority) );
+       
+        add_action('init', function() use ($url_callbacks) {
+            $this->maybe_flush_rewrites($url_callbacks);
+        }, 99);
+    }
+
+    protected function maybe_flush_rewrites($url_callbacks) {
+
+        $current = md5(json_encode(array_keys($url_callbacks)));
+
+        $cached = get_option(get_called_class(), null );
+
+        if ( empty( $cached ) ||  $current !== $cached ) {
+            flush_rewrite_rules();
+            update_option(get_called_class(), $current );
+        }
+    }
+  
+    protected function query_var_name($rewrite) {
+
+        static $cache;
+
+        if(!isset($cache[$rewrite])){
+            $cache[$rewrite] = md5($rewrite);
+        }
+
+        return $cache[$rewrite]; 
+    }
+
+    protected function send_404() {
+        global $wp_query;
+        status_header('404');
+        $wp_query->set_404();
+    }
+}

composer.json

@@ -0,0 +1,12 @@
+{
+    "name": "thefold/wordpress-dispatcher",
+    "description": "Create URL endpoints within WordPress",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Tim Field",
+            "email": "tim@thefold.co.nz"
+        }
+    ],
+    "require": {}
+}