From 5e044ecbd0e1914d93ebde1514b4567e8a17b1de Mon Sep 17 00:00:00 2001
From: Silvio Rhatto <rhatto@riseup.net>
Date: Thu, 6 Oct 2011 16:50:35 -0300
Subject: Use muamba_current_transaction() at muamba_node_view()

---
 muamba-widget.tpl.php |  2 +-
 muamba.business.inc   | 12 +++++++
 muamba.db.inc         | 99 ++++++++++++++++++++++++---------------------------
 muamba.module         |  6 ++--
 4 files changed, 62 insertions(+), 57 deletions(-)

diff --git a/muamba-widget.tpl.php b/muamba-widget.tpl.php
index 1b2a598..3caf614 100644
--- a/muamba-widget.tpl.php
+++ b/muamba-widget.tpl.php
@@ -4,7 +4,7 @@
  * @file
  * Template for displaying the muamba widget.
  *
- * @todo
+ * @todo: use $transaction
  *   Show item status: can it be requested?
  *   Is this item already requested?
  */
diff --git a/muamba.business.inc b/muamba.business.inc
index 195409f..cd9dc5d 100644
--- a/muamba.business.inc
+++ b/muamba.business.inc
@@ -5,6 +5,18 @@
  * Business logic for Muamba.
  */
 
+/**
+ * Define which status belongs to an ongoing transaction.
+ */
+function muamba_ongoing() {
+  return array(
+    MUAMBA_REQUESTED,
+    MUAMBA_ACCEPTED,
+    MUAMBA_RETURNED,
+    MUAMBA_LOST,
+  );
+}
+
 /**
  * Determine possible actions for a transaction.
  *
diff --git a/muamba.db.inc b/muamba.db.inc
index 4414a1a..6c2f74d 100644
--- a/muamba.db.inc
+++ b/muamba.db.inc
@@ -82,25 +82,16 @@ function muamba_get_transactions($uid, $type = 'sent', $status = NULL) {
 /**
  * Get a single transaction.
  *
- * @param $data
- *   Transaction id or node object.
+ * @param $mid
+ *   Transaction id.
  *
  * @return
  *   Transaction data.
- *
- * @todo
- *   When a node is provided, duplicate rows might occur.
  */
-function muamba_get_transaction($data) {
+function muamba_get_transaction($mid) {
   $query = db_select('muamba', 'm');
   $query->fields('m', array('mid', 'nid', 'uid', 'owner', 'status', 'thread_id'));
-
-  if (is_object($data)) {
-    $query->condition('m.nid', $data->nid, '=');
-  }
-  else {
-    $query->condition('m.mid', (int) $data, '=');
-  }
+  $query->condition('m.mid', (int) $mid, '=');
 
   $rows    = array();
   $results = $query->execute()->fetchAll();
@@ -115,60 +106,64 @@ function muamba_get_transaction($data) {
   }
 }
 
-/**
- * Check item availability.
- *
- * @param $nid
- *   Item nid.
- *
- * @param $uid
- *   Requester user nid.
- *
- * @return
- *   TRUE if user already requested an item, FALSE otherwise.
- *
- * @todo
- */
-function muamba_check_availability($nid, $uid = NULL) {
-}
-
 /**
  * Get current transaction for an item.
  *
- * @param $nid
- *   Item nid.
+ * @param $data
+ *   Item nid or node object.
  *
  * @return
  *   Transaction nid there's an ongoing transaction.
- *
- * @todo
  */
-function muamba_current_transaction($nid) {
+function muamba_current_transaction($data) {
+  if (is_object($data)) {
+    $nid = (int) $data->nid;
+  }
+  else {
+    $nid = (int) $data;
+  }
+
   $query = db_select('muamba', 'm');
   $query->fields('m', array('mid', 'nid', 'uid', 'owner', 'status', 'thread_id'));
 
-  $query->condition('m.nid', $nid, '=');
-  $query->condition(
-    db_or()
-    ->condition('m.status', MUAMBA_REQUESTED, '=')
-    ->condition('m.status', MUAMBA_ACCEPTED,  '=')
-    ->condition('m.status', MUAMBA_RETURNED,  '=')
-    ->condition('m.status', MUAMBA_LOST,      '=')
-  );
+  $query
+    ->condition('m.nid', $nid, '=')
+    ->condition('m.status', array(muamba_ongoing()), 'IN');
 
   $results = $query->execute()->fetchAll();
 
-  return $results;
+  // Sanitize the data before handing it off to the theme layer.
+  foreach ($results as $entry) {
+    $rows[] = array_map('check_plain', (array) $entry);
+  }
+
+  if (isset($rows[0])) {
+    return $rows[0];
+  }  
 }
 
 /**
- * Define which status belongs to an ongoing transaction.
+ * Check item availability.
+ *
+ * @param $data
+ *   Item nid or node object.
+ *
+ * @return
+ *   TRUE if user already requested an item, FALSE otherwise.
  */
-function muamba_ongoing() {
-  return array(
-    MUAMBA_REQUESTED,
-    MUAMBA_ACCEPTED,
-    MUAMBA_RETURNED,
-    MUAMBA_LOST,
-  );
+function muamba_check_availability($data) {
+  if (is_object($data)) {
+    $nid = (int) $data->nid;
+  }
+  else {
+    $nid = (int) $data;
+  }
+
+  $current = muamba_current_transaction($nid);
+
+  if (empty($current)) {
+    return TRUE;
+  }
+
+  return FALSE;
 }
diff --git a/muamba.module b/muamba.module
index 2835dd9..5a92f35 100644
--- a/muamba.module
+++ b/muamba.module
@@ -18,6 +18,7 @@ define('MUAMBA_RECOVERED', 5);
 define('MUAMBA_LOST',      6);
 
 // Load requirements.
+include_once('muamba.business.inc');
 include_once('muamba.misc.inc');
 include_once('muamba.db.inc');
 
@@ -106,9 +107,6 @@ function muamba_menu() {
 
 /**
  * Implements hook_node_view()
- *
- * @todo
- *   Use muamba_check_availability() before muamba_get_transaction()
  */
 function muamba_node_view($node, $view_mode, $langcode) {
   global $user;
@@ -119,7 +117,7 @@ function muamba_node_view($node, $view_mode, $langcode) {
   }
 
   if ($view_mode == 'full') {
-    $transaction             = muamba_get_transaction($node);
+    $transaction             = muamba_current_transaction($node);
     $node->content['muamba'] = array(
       '#markup' => theme('muamba_widget', array('nid' => $node->nid, 'transaction' => $transaction)),
       '#weight' => 100,
-- 
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