From b9455efd8430d3578376400f986e62223f1504b3 Mon Sep 17 00:00:00 2001
From: Jin^eLD <jin@mediatomb.cc>
Date: Thu, 5 Sep 2013 00:45:36 +0300
Subject: Function for retreiving a list of friend numbers

This should allow clients to sync the Tox friend list with their UI/etc.
lists.
---
 toxcore/Messenger.c | 34 ++++++++++++++++++++++++++++++++++
 toxcore/Messenger.h |  7 +++++++
 toxcore/tox.c       | 11 +++++++++++
 toxcore/tox.h       |  8 ++++++++
 4 files changed, 60 insertions(+)

(limited to 'toxcore')

diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index f97a3320..90d4e43d 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -1052,3 +1052,37 @@ int Messenger_load(Messenger *m, uint8_t *data, uint32_t length)
 
     return 0;
 }
+
+/* Allocate and return a list of valid friend id's. List must be freed by the
+ * caller.
+ *
+ * retun 0 if success.
+ * return -1 if failure.
+ */
+int get_friendlist(Messenger *m, int **out_list, uint32_t *out_list_length)
+{
+    uint32_t i;
+
+    *out_list_length = 0;
+
+    if (m->numfriends == 0) {
+        *out_list = NULL;
+        return 0;
+    }
+
+    *out_list = malloc(m->numfriends * sizeof(int));
+
+    if (*out_list == NULL) {
+        return -1;
+    }
+
+    for (i = 0; i < m->numfriends; i++) {
+        if (m->friendlist[i].status > 0) {
+            (*out_list)[i] = i;
+            (*out_list_length)++;
+        }
+    }
+
+    return 0;
+}
+
diff --git a/toxcore/Messenger.h b/toxcore/Messenger.h
index fedf2879..649ca894 100644
--- a/toxcore/Messenger.h
+++ b/toxcore/Messenger.h
@@ -377,5 +377,12 @@ void Messenger_save(Messenger *m, uint8_t *data);
 /* Load the messenger from data of size length. */
 int Messenger_load(Messenger *m, uint8_t *data, uint32_t length);
 
+/* Allocate and return a list of valid friend id's. List must be freed by the
+ * caller.
+ *
+ * retun 0 if success.
+ * return -1 if failure.
+ */
+int get_friendlist(Messenger *m, int **out_list, uint32_t *out_list_length);
 
 #endif
diff --git a/toxcore/tox.c b/toxcore/tox.c
index 23ca6572..e55f51ca 100644
--- a/toxcore/tox.c
+++ b/toxcore/tox.c
@@ -247,6 +247,17 @@ void tox_set_sends_receipts(void *tox, int friendnumber, int yesno)
     m_set_sends_receipts(m, friendnumber, yesno);
 }
 
+/* Allocate and return a list of valid friend id's. List must be freed by the
+ * caller.
+ *
+ * retun 0 if success.
+ * return -1 if failure.
+ */
+int tox_get_friendlist(void *tox, int **out_list, uint32_t *out_list_length)
+{
+    Messenger *m = tox;
+    return get_friendlist(m, out_list, out_list_length);
+}
 
 /* Set the function that will be executed when a friend request is received.
  *  Function format is function(uint8_t * public_key, uint8_t * data, uint16_t length)
diff --git a/toxcore/tox.h b/toxcore/tox.h
index b17ca36f..bd13b998 100644
--- a/toxcore/tox.h
+++ b/toxcore/tox.h
@@ -221,6 +221,14 @@ TOX_USERSTATUS tox_get_selfuserstatus(Tox *tox);
  */
 void tox_set_sends_receipts(Tox *tox, int friendnumber, int yesno);
 
+/* Allocate and return a list of valid friend id's. List must be freed by the
+ * caller.
+ *
+ * retun 0 if success.
+ * return -1 if failure.
+ */
+int tox_get_friendlist(void *tox, int **out_list, uint32_t *out_list_length);
+
 /* Set the function that will be executed when a friend request is received.
  *  Function format is function(uint8_t * public_key, uint8_t * data, uint16_t length)
  */
-- 
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