Adding an admin page for viewing extensions from the RSS feed

tripal_core/api/tripal_core.chado_schema.api.inc

@@ -108,7 +108,7 @@ function chado_add_index($table, $name, $fields) {
 }
 
 /**
- * Check that any given schema exists
+ * Check that any given schema exists.
  *
  * @param $schema
  *   The name of the schema to check the existence of
@@ -120,7 +120,6 @@ function chado_add_index($table, $name, $fields) {
  */
 function chado_dbschema_exists($schema) {
 
-  // check that the chado schema now exists
   $sql = "
     SELECT nspname
     FROM pg_namespace
@@ -129,12 +128,11 @@ function chado_dbschema_exists($schema) {
       nspname = :nspname
     ORDER BY nspname
   ";
-  $results = db_query($sql, array(':nspname' => $schema));
-  $name = $results->fetchObject();
-  if (strcmp($name->nspname, $schema) != 0) {
-    return FALSE;
+  $schema = db_query($sql, array(':nspname' => $schema))->fetchField();
+  if ($schema) {
+    return TRUE;
   }
-  return TRUE;
+  return FALSE;
 }
 
 /**

tripal_core/includes/tripal_core.extensions.inc

@@ -0,0 +1,71 @@
+<?php
+
+function tripal_core_extensions_form($form, &$form_state = NULL) {
+
+  // Get the RSS feed XML from the tripa.info website.
+  $content = file_get_contents("http://tripal.info/rss/extensions.xml");
+  $xml = new SimpleXmlElement($content);
+  $namespace = "http://tripal.info/rss/extensions/";
+
+  // Parse the items into an array indexed by category and compatible versions.
+  $items = array();
+  foreach ($xml->channel->item as $item) {
+    $category = (string) $item->category;
+    // In order to get fields in the 'tripal_extension' name space we must
+    // pass in the $namespace to the children function.  We first get the
+    // Tripal versions, then the chado versions and organize the elements
+    // accordintly.
+    $tvs = preg_split('/, /', (string) $item->children($namespace)->tripal_version);
+    foreach($tvs as $tv) {
+      $cvs = preg_split('/, /', (string) $item->children($namespace)->chado_version);
+      foreach($cvs as $cv) {
+        // Index the items by category, tripal version and chado version
+        $items[$tv][$cv][$category][] = $item;
+      }
+    }
+  }
+
+  // Get the Chado version and convert to the expected format
+  $chado_version = chado_get_version(TRUE);
+  $chado_version = preg_replace('/^(\d\.\d).*$/', "v$1x", $chado_version);
+
+  // Get the Tripal version. This is the version set in the tripal_core.info
+  $info = system_get_info('module', 'tripal_core');
+  $tripal_version = $info['version'];
+  $tripal_version = preg_replace('/^.*?-(\d\.\d+).*$/', "v$1", $tripal_version);
+
+  $form['type_select'] = array(
+    '#type' => 'select',
+    '#options' => array(
+      'Bulk Loader Templates' => 'Bulk Loader Templates',
+      'Materialized View' => 'Materialized View',
+      'Extension Module' => 'Extension Module',
+    ),
+    '#default_value' => 'Extension Module',
+  );
+
+  // Iterate through the compatible extensions
+  foreach ($items[$tripal_version][$chado_version] as $category) {
+     $markup = '';
+     switch ($category) {
+       case 'Bulk Loader Template':
+         break;
+       case 'Materialized View':
+         break;
+       case 'Extension Module':
+         break;
+       default:
+         break;
+     }
+  }
+
+  return $form;
+}
+
+function tripal_core_extensions_form_validate($form, &$form_state) {
+
+}
+
+function tripal_core_extensions_form_submit($form, &$form_state) {
+
+}

tripal_core/tripal_core.install

@@ -529,14 +529,11 @@ function tripal_core_get_tripal_vars_schema() {
     ),
     'indexes' => array (
       'tripal_node_variables_idx1' => array (
-        0 => 'node_variable_id',
-      ),
-      'tripal_node_variables_idx2' => array (
         0 => 'variable_id',
       ),
     ),
     'foreign keys' => array (
-      'tripal_terms' => array (
+      'tripal_variables' => array (
         'table' => 'tripal_variables',
         'columns' => array (
           'variable_id' => 'variable_id',

tripal_core/tripal_core.module

@@ -37,7 +37,7 @@ require_once 'api/tripal_core.tripal_variables.api.inc';
 
 require_once 'api/tripal_core.DEPRECATED.inc';
 
-// INCLUDES 
+// INCLUDES
 require_once 'includes/tripal_core.jobs.inc';
 require_once 'includes/tripal_core.mviews.inc';
 require_once 'includes/tripal_core.custom_tables.inc';
@@ -163,12 +163,22 @@ function tripal_core_menu() {
     'weight' => -4
   );
   $items['admin/tripal/extension'] = array(
-    'title' => 'Extension Modules',
-    'description' => t('Configuration for Tripal extension modules.'),
+    'title' => 'Extensions',
+    'description' => t('Configuration for Tripal extensions.'),
     'access arguments' => array('administer tripal'),
     'type' => MENU_NORMAL_ITEM,
     'weight' => 0
   );
+  $items['admin/tripal/extension/available'] = array(
+    'title' => 'Available Extensions',
+    'description' => 'Queries the tripal.info site to find extensions that may be compatible with this site.',
+    'page callback' => 'drupal_get_form',
+    'page arguments' => array('tripal_core_extensions_form'),
+    'access arguments' => array('administer tripal'),
+    'type' => MENU_LOCAL_TASK,
+    'file' =>  'includes/tripal_core.extensions.inc',
+    'file path' => drupal_get_path('module', 'tripal_core'),
+  );
 
   // Tripal Setup
   $items['admin/tripal/setup'] = array(
@@ -366,7 +376,7 @@ function tripal_core_menu() {
     'access arguments' => array('access content'),
     'type' => MENU_CALLBACK
   );
-  
+
   // The node's TOC tab
   $items['node/%node/tripal_toc'] = array(
     'title' => 'TOC',
@@ -377,7 +387,7 @@ function tripal_core_menu() {
     'type' => MENU_LOCAL_TASK,
     'file' => '/includes/tripal_core.toc.inc',
   );
-  
+
   // Web Services API callbacks.
 //   $items['ws/chado/v0.1'] = array(
 //     'title' => 'Tripal Web Services API v0.1',
@@ -401,7 +411,7 @@ function tripal_core_menu() {
  */
 function tripal_core_access_node_toc_form($node) {
   $types = module_invoke_all('node_info');
-  if (array_key_exists($node->type, $types) and 
+  if (array_key_exists($node->type, $types) and
       array_key_exists('chado_node_api', $types[$node->type])) {
     return user_access('administer tripal');
   }
@@ -429,18 +439,18 @@ function tripal_core_permission() {
     ),
     'view dev helps' => array(
       'title' => t('View Developer Hints'),
-      'description' => t('Tripal will provide blue shaded boxes that provide 
-          instructions for how to customize or setup specific pages on a 
-          site.  This permission should be enabled for developers. But can 
+      'description' => t('Tripal will provide blue shaded boxes that provide
+          instructions for how to customize or setup specific pages on a
+          site.  This permission should be enabled for developers. But can
           be disabled once developers are accustomed to these hints.'),
       'restrict access' => TRUE,
     ),
     'view ids' => array(
       'title' => t('View Internal IDs'),
       'description' => t('On content pages Tripal will typically provide
-          a table of information pulled from the Chado database but the 
-          primary key IDs for that data is typically not shown.  The 
-          default Tripal templates can show the primary key ID inside of a 
+          a table of information pulled from the Chado database but the
+          primary key IDs for that data is typically not shown.  The
+          default Tripal templates can show the primary key ID inside of a
           blue shaded table row if this permission is enabled. This can
           be useful for site developers who might want these IDs when working
           with the underlying database.'),
@@ -503,7 +513,7 @@ function tripal_core_theme($existing, $type, $theme, $path) {
       'function' => 'theme_tripal_admin_message',
       'variables' => array('message' => NULL),
     ),
-    
+
     // Form and form element themes.
     // --------------------------------
     'tripal_node_toc_items_table' => array(
@@ -595,7 +605,7 @@ function tripal_core_node_view_alter(&$build) {
 
 /**
  * Implements hook_node_view()
- * 
+ *
  * @ingroup tripal_core
  */
 function tripal_core_node_view($node, $view_mode, $langcode) {