Adding transactional fields to muamba data model

1 files changed, 111 insertions, 0 deletions

diff --git a/muamba.business.inc b/muamba.business.inc
new file mode 100644
index 0000000..f7b9e05
--- /dev/null
+++ b/muamba.business.inc
@@ -0,0 +1,111 @@
+<?php
+
+/**
+ * @file
+ * Business logic handling functions for Muamba.
+ */
+
+/**
+ * Request an item.
+ *
+ * @param $nid
+ *   Requested item.
+ */
+function muamba_request($nid) {
+  // Sanitize
+  $nid  = (int) $nid;
+  $node = node_load($nid);
+
+  if (!$node || $node->type != MUAMBA_NODE_TYPE) {
+    drupal_not_found();
+  }
+
+  global $user;
+
+  // TODO: check if user has permission to access the node.
+  // TODO: check if user is not blocked by privatemsg?
+
+  // Check if user already requested the item
+  if (muamba_check_user_request($nid, $user->uid)) {
+    // TODO
+  }
+
+  // Notify item owner
+  $thread = privatemsg_new_thread(array(user_load($node->uid)), t('Item request'), 'User has requested an item');
+  $thread_id = $thread['message']['thread_id'];
+
+  // Issue item request
+  // TODO
+
+  // User output
+  return t('You have requested an item');
+}
+
+/**
+ * Check if user already requested an item.
+ *
+ * @param $nid
+ *   Item nid.
+ *
+ * @param $uid
+ *   Requester user nid.
+ *
+ * @return
+ *   TRUE if user already requested an item, FALSE otherwise.
+ */
+function muamba_check_user_request($nid, $uid) {
+  if (!is_int($nid) || !is_int($uid)) {
+    return FALSE;
+  }
+
+  $query = db_select('muamba', 'm');
+
+  $query
+    ->condition('m.nid', $nid, '=')
+    ->condition('m.uid', $uid, '=');
+
+  $result = $query->countQuery()->execute()->fetchField();
+
+  if ($result > 0) {
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+/**
+ * Release an item requested by a given user.
+ *
+ * @param $nid
+ *   Item nid.
+ *
+ * @param $uid
+ *   Requester user uid.
+ *
+ * @todo
+ */
+function muamba_release($nid, $uid) {
+  global $user;
+
+  $nid  = (int) $nid;
+  $node = node_load($nid);
+
+  if (!$node || $node->type != MUAMBA_NODE_TYPE) {
+    drupal_not_found();
+  }
+
+  if ($node->uid != $user->uid) {
+    // TODO: not node owner
+  }
+}
+
+/**
+ * Get the requests sent or received.
+ *
+ * @param $uid
+ *   Requester user uid.
+ *
+ * @todo
+ */
+function muamba_get_requests($nid, $type = 'sent') {
+}