Initial commit

singletons/query.php

@@ -0,0 +1,194 @@
+<?php
+
+class JSON_API_Query {
+  
+  // Default values
+  protected $defaults = array(
+    'date_format' => 'Y-m-d H:i:s',
+    'read_more' => 'Read more'
+  );
+  
+  function __construct() {
+    // Register JSON API query vars
+    add_filter('query_vars', array(&$this, 'query_vars'));
+  }
+  
+  function get($key) {
+    if (is_array($key)) {
+      $result = array();
+      foreach ($key as $k) {
+        $result[$k] = $this->get($k);
+      }
+      return $result;
+    }
+    $query_var = (isset($_REQUEST[$key])) ? $_REQUEST[$key] : null;
+    $wp_query_var = $this->wp_query_var($key);
+    if ($wp_query_var) {
+      return $wp_query_var;
+    } else if ($query_var) {
+      return $this->strip_magic_quotes($query_var);
+    } else if (isset($this->defaults[$key])) {
+      return $this->defaults[$key];
+    } else {
+      return null;
+    }
+  }
+  
+  function __get($key) {
+    return $this->get($key);
+  }
+  
+  function __isset($key) {
+    return ($this->get($key) !== null);
+  }
+  
+  function wp_query_var($key) {
+    $wp_translation = array(
+      'json' =>           'json',
+      'post_id' =>        'p',
+      'post_slug' =>      'name',
+      'page_id' =>        'page_id',
+      'page_slug' =>      'name',
+      'category_id' =>    'cat',
+      'category_slug' =>  'category_name',
+      'tag_id' =>         'tag_id',
+      'tag_slug' =>       'tag',
+      'author_id' =>      'author',
+      'author_slug' =>    'author_name',
+      'search' =>         's',
+      'order' =>          'order',
+      'order_by' =>       'orderby'
+    );
+    if ($key == 'date') {
+      $date = null;
+      if (get_query_var('year')) {
+        $date = get_query_var('year');
+      }
+      if (get_query_var('monthnum')) {
+        $month = get_query_var('monthnum');
+        if ($month < 10) {
+          $month = "0$month";
+        }
+        $date .= $month;
+      }
+      if (get_query_var('day')) {
+        $day = get_query_var('day');
+        if ($day < 10) {
+          $day = "0$day";
+        }
+        $date .= $day;
+      }
+      return $date;
+    } else if (isset($wp_translation[$key])) {
+      return get_query_var($wp_translation[$key]);
+    } else {
+      return null;
+    }
+  }
+  
+  function strip_magic_quotes($value) {
+    if (get_magic_quotes_gpc()) {
+      return stripslashes($value);
+    } else {
+      return $value;
+    }
+  }
+  
+  function query_vars($wp_vars) {
+    $wp_vars[] = 'json';
+    return $wp_vars;
+  }
+  
+  function get_controller() {
+    $json = $this->get('json');
+    if (empty($json)) {
+      return false;
+    }
+    if (preg_match('/^[a-zA-Z_]+$/', $json)) {
+      return $this->get_legacy_controller($json);
+    } else if (preg_match('/^([a-zA-Z_]+)(\/|\.)[a-zA-Z_]+$/', $json, $matches)) {
+      return $matches[1];
+    } else {
+      return 'core';
+    }
+  }
+  
+  function get_legacy_controller($json) {
+    global $json_api;
+    if ($json == 'submit_comment') {
+      if ($json_api->controller_is_active('respond')) {
+        return 'respond';
+      } else {
+        $json_api->error("The 'submit_comment' method has been removed from the Core controller. To use this method you must enable the Respond controller from WP Admin > Settings > JSON API.");
+      }
+    } else if ($json == 'create_post') {
+      if ($json_api->controller_is_active('posts')) {
+        return 'posts';
+      } else {
+        $json_api->error("The 'create_post' method has been removed from the Core controller. To use this method you must enable the Posts controller from WP Admin > Settings > JSON API.");
+      }
+    } else {
+      return 'core';
+    }
+  }
+  
+  function get_method($controller) {
+    
+    global $json_api;
+    
+    // Returns an appropriate API method name or false. Four possible outcomes:
+    //   1. API isn't being invoked at all (return false)
+    //   2. A specific API method was requested (return method name)
+    //   3. A method is chosen implicitly on a given WordPress page
+    //   4. API invoked incorrectly (return "error" method)
+    //
+    // Note:
+    //   The implicit outcome (3) is invoked by setting the json query var to a
+    //   non-empty value on any WordPress page:
+    //     * http://example.org/2009/11/10/hello-world/?json=1 (get_post)
+    //     * http://example.org/2009/11/?json=1 (get_date_posts)
+    //     * http://example.org/category/foo?json=1 (get_category_posts)
+    
+    $method = $this->get('json');
+    if (strpos($method, '/') !== false) {
+      $method = substr($method, strpos($method, '/') + 1);
+    } else if (strpos($method, '.') !== false) {
+      $method = substr($method, strpos($method, '.') + 1);
+    }
+    
+    if (empty($method)) {
+      // Case 1: we're not being invoked (done!)
+      return false;
+    } else if (method_exists("JSON_API_{$controller}_Controller", $method)) {
+      // Case 2: an explicit method was specified
+      return $method;
+    } else if ($controller == 'core') {
+      // Case 3: choose the method implicitly based on which page we're on...
+      if (is_search()) {
+        return 'get_search_results';
+      } else if (is_home()) {
+        if (empty($_GET['json'])) {
+          $json_api->error("Uknown method '$method'.");
+        }
+        return 'get_recent_posts';
+      } else if (is_page()) {
+        return 'get_page';
+      } else if (is_single()) {
+        return 'get_post';
+      } else if (is_category()) {
+        return 'get_category_posts';
+      } else if (is_tag()) {
+        return 'get_tag_posts';
+      } else if (is_author()) {
+        return 'get_author_posts';
+      } else if (is_date()) {
+        return 'get_date_posts';
+      } else if (is_404()) {
+        return '404';
+      }
+    }
+    // Case 4: either the method doesn't exist or we don't support the page implicitly
+    return 'error';
+  }
+  
+}