Add comments in function get_mb_id.

The function can now be fed an artist name to be placed in the
MusicBrainz query string. This will allow it to be used in a loop in the
future.

get_artist_art.c

@@ -4,9 +4,10 @@
 #include <stdlib.h>
 #include <unistd.h>
 
+#define version_str "1.0"
 #define conf_file "config.ini"
 #define mb_url                                                                 \
-  "https://musicbrainz.org/ws/2/artist?query=artist:\"Slayer\"&fmt=json"
+  "https://musicbrainz.org/ws/2/artist?query=artist:\"%s\"&fmt=json"
 
 const char *get_conf_str(char set_key[]) {
   const char *prog_conf = malloc(10 * sizeof(char));
@@ -65,21 +66,28 @@ void print_conf(const char m_dir[], const int mb_conf,
   }
 }
 
-const char *get_mb_id() {
+const char *get_mb_id(char *artist_name) {
   int response_code;
   const char *mb_id;
   CURL *curl;
   CURLcode res;
   char *buffer;
   long res_len;
+  char mb_url_full[100];
 
   curl_global_init(CURL_GLOBAL_DEFAULT);
 
   curl = curl_easy_init();
 
   if (curl) {
-    curl_easy_setopt(curl, CURLOPT_URL, mb_url);
-	curl_easy_setopt(curl, CURLOPT_USERAGENT, "get_artist_art.py/1.0");
+	/*Make the artist name URL safe.*/
+	char *artist_name_esc = curl_easy_escape(curl, artist_name, 0);
+	printf("%s", artist_name_esc);
+	/*Format the MB URL to insert the Artist name for the query.*/
+    snprintf(mb_url_full, sizeof(mb_url_full), mb_url, artist_name_esc);
+	printf("%s\n", mb_url_full);
+    curl_easy_setopt(curl, CURLOPT_URL, mb_url_full);
+    curl_easy_setopt(curl, CURLOPT_USERAGENT, "get_artist_art.py/1.0");
 
     res = curl_easy_perform(curl);
 
@@ -133,7 +141,7 @@ int main(int argc, char **argv) {
     }
   }
 
-  get_mb_id();
+  get_mb_id("The Beatles");
 
   return EXIT_SUCCESS;
 }