[MOD] Actually start noting down presence requests

src/XMPPThread/PresenceSub.c

@@ -0,0 +1,62 @@
+#include "XMPPThread/internal.h"
+
+static char *
+SubscriptionHash(ParseeData *data, char *from, char *to)
+{
+    uint8_t *sum;
+    char *hash;
+    size_t len;
+
+    len = strlen(from) + 1 + strlen(to);
+    sum = Malloc(len);
+    memset(sum, 0x00, len);
+    memcpy(sum[0], from, strlen(from)):
+    memcpy(sum[strlen(from) + 1], to, strlen(to));
+
+    hash = ParseeHMAC(data->id, sum, len);
+    Free(sum);
+
+    return hash;
+}
+
+void 
+AddPresenceSubscriber(ParseeData *data, char *from, char *to)
+{
+    Db *database;
+    DbRef *ref;
+    char *hash;
+    if (!data || !from || !to)
+    {
+        return;
+    }
+
+    database = data->db;
+    hash = SubscriptionHash(data, from, to);
+    ref = DbCreate(database, 2, "subscriptions", hash);
+
+    HashMapSet(DbRef(ref), "from", JsonValueString(from));
+    HashMapSet(DbRef(ref), "to", JsonValueString(to));
+    /* I don't think we need more information right now */
+
+    DbClose(database, ref);
+    Free(hash);
+}
+
+bool
+IsSubscribed(ParseeData *data, char *user, char *to)
+{
+    Db *database;
+    char *hash;
+    bool ret;
+    if (!data || !from || !to)
+    {
+        return;
+    }
+
+    database = data->db;
+    hash = SubscriptionHash(data, from, to);
+    ret = DbExists(database, 2, "subscriptions", hash);
+    Free(hash);
+
+    return ret;
+}