added writing metadata to file

friend.c

@@ -47,12 +47,15 @@ void friend_set_alias(FRIEND *f, char_t *alias, STRING_IDX length){
     if(length == 0) {
         f->alias = NULL;
         f->alias_length = 0;
+        f->metadata.alias_length = 0;
     } else {
         f->alias = malloc(length + 1);
         memcpy(f->alias, alias, length);
         f->alias_length = length;
+        f->metadata.alias_length = length;
     }
     f->alias[f->alias_length] = 0;
+    utox_write_metadata(f);
 }
 
 void friend_sendimage(FRIEND *f, UTOX_NATIVE_IMAGE *native_image, uint16_t width, uint16_t height, UTOX_PNG_IMAGE png_image, size_t png_size)

friend.h

@@ -1,3 +1,8 @@
+typedef struct friend_meta_data {
+    size_t alias_length;
+    uint8_t data[];
+} FRIEND_META_DATA;
+
 typedef struct friend {
     _Bool online, typing, notify;
     uint8_t calling, status;
@@ -16,12 +21,9 @@ typedef struct friend {
     AVATAR avatar;
 
     uint16_t transfer_count;
-} FRIEND;
 
-typedef struct friend_meta_data {
-    size_t alias_length;
-    uint8_t alias[];
-} FRIEND_META_DATA;
+    FRIEND_META_DATA metadata;
+} FRIEND;
 
 #define MAX_GROUP_PEERS 256
 

tox.c

@@ -228,6 +228,7 @@ void log_read(Tox *tox, int fid)
 
 void friend_meta_data_read(Tox *tox, int friend_id)
 {
+    /* Will need to be rewritten if anything is added to friend's meta data */
     uint8_t path[UTOX_FILE_NAME_LENGTH], *p;
     p = path + datapath(path);
 
@@ -238,15 +239,21 @@ void friend_meta_data_read(Tox *tox, int friend_id)
     }
 
     uint32_t size;
-    void *metadata = file_raw((char*)path, &size);
-    if (!metadata) {
+    void *mdata = file_raw((char*)path, &size);
+    if (!mdata) {
         debug("Meta Data not found (%s)\n", path);
         return;
     }
-    size_t alias_length = 0;
-    memcpy(&alias_length, metadata, sizeof(size_t));
-    if (alias_length) {
-        friend_set_alias(&friend[friend_id], metadata + sizeof(size_t), alias_length);
+    FRIEND_META_DATA *metadata = calloc(1, sizeof(*metadata));
+
+    if (size < sizeof(*metadata)) {
+        debug("Meta Data was incomplete\n");
+        return;
+    }
+
+    memcpy(metadata, mdata, sizeof(*metadata));
+    if (metadata->alias_length) {
+        friend_set_alias(&friend[friend_id], mdata + sizeof(size_t), metadata->alias_length);
     }
 }
 

util.c

@@ -717,3 +717,28 @@ void config_save(UTOX_SAVE *save)
     fwrite(options.proxy_host, strlen(options.proxy_host), 1, file);
     fclose(file);
 }
+
+void utox_write_metadata(FRIEND *f){
+    /* data sizes */
+    size_t data_sz = 0, current_sz = 0;
+    size_t alias_sz = strlen((const char*)f->alias);
+    data_sz += alias_sz;
+
+    /* Create path */
+    uint8_t dest[UTOX_FILE_NAME_LENGTH], *dest_p;
+    dest_p = dest + datapath(dest);
+    cid_to_string(dest_p, f->cid);
+    memcpy((char*)dest_p + (TOX_PUBLIC_KEY_SIZE * 2), ".fmetadata", sizeof(".fmetadata"));
+
+    /* Create data */
+    uint8_t *data = malloc(sizeof(FRIEND_META_DATA) + data_sz + 1);
+    memcpy(data, &f->metadata, sizeof(FRIEND_META_DATA));
+    current_sz = sizeof(FRIEND_META_DATA);
+    /* copy the data */
+        /* alias */
+        memcpy(data + current_sz, f->alias, alias_sz);
+        current_sz += alias_sz;
+
+    /* Write */
+    file_write_raw(dest, data, current_sz);
+}

util.h

@@ -6,6 +6,11 @@
  */
 void* file_raw(char *path, uint32_t *size);
 
+/*
+ * Write *data, of size, to path on disk.
+ */
+void file_write_raw(uint8_t *path, uint8_t *data, size_t size);
+
 //add null terminator to data
 void* file_text(char *path);
 
@@ -91,3 +96,9 @@ void scale_rgbx_image(uint8_t *old_rgbx, uint16_t old_width, uint16_t old_height
  */
 UTOX_SAVE* config_load(void);
 void config_save(UTOX_SAVE *save);
+
+
+/*
+ Saves user meta data to disk
+ */
+void utox_write_metadata(FRIEND *f);