despotify: Add support utilities

Used to connect and authenticate to despotify. Provides a singleton
session and a desptoify-track-to-tags function.

1 files changed, 121 insertions, 0 deletions

diff --git a/src/despotify_utils.c b/src/despotify_utils.c
new file mode 100644
index 000000000..7555d105d
--- /dev/null
+++ b/src/despotify_utils.c
@@ -0,0 +1,121 @@
+#include <glib.h>
+#include <despotify.h>
+
+#include "tag.h"
+#include "conf.h"
+#include "despotify_utils.h"
+
+static struct despotify_session *g_session;
+static void (*registered_callbacks[8])(struct despotify_session *,
+		int, void *, void *);
+static void *registered_callback_data[8];
+
+static void callback(struct despotify_session* ds, int sig,
+		void* data, G_GNUC_UNUSED void* callback_data)
+{
+	size_t i;
+
+	for (i = 0; i < sizeof(registered_callbacks) / sizeof(registered_callbacks[0]); i++) {
+		void (*cb)(struct despotify_session *, int, void *, void *) = registered_callbacks[i];
+		void *cb_data = registered_callback_data[i];
+
+		if (cb)
+			cb(ds, sig, data, cb_data);
+	}
+}
+
+bool mpd_despotify_register_callback(void (*cb)(struct despotify_session *, int, void *, void *),
+		void *cb_data)
+{
+	size_t i;
+
+	for (i = 0; i < sizeof(registered_callbacks) / sizeof(registered_callbacks[0]); i++) {
+
+		if (!registered_callbacks[i]) {
+			registered_callbacks[i] = cb;
+			registered_callback_data[i] = cb_data;
+
+			return true;
+		}
+	}
+
+	return false;
+}
+
+void mpd_despotify_unregister_callback(void (*cb)(struct despotify_session *, int, void *, void *))
+{
+	size_t i;
+
+	for (i = 0; i < sizeof(registered_callbacks) / sizeof(registered_callbacks[0]); i++) {
+
+		if (registered_callbacks[i] == cb) {
+			registered_callbacks[i] = NULL;
+		}
+	}
+}
+
+
+struct tag *mpd_despotify_tag_from_track(struct ds_track *track)
+{
+	char tracknum[20];
+	char comment[80];
+	char date[20];
+	struct tag *tag;
+
+	tag = tag_new();
+
+	if (!track->has_meta_data)
+		return tag;
+
+	g_snprintf(tracknum, sizeof(tracknum), "%d", track->tracknumber);
+	g_snprintf(date, sizeof(date), "%d", track->year);
+	g_snprintf(comment, sizeof(comment), "Bitrate %d Kbps, %sgeo restricted",
+			track->file_bitrate / 1000, track->geo_restricted ? "" : "not ");
+	tag_add_item(tag, TAG_TITLE, track->title);
+	tag_add_item(tag, TAG_ARTIST, track->artist->name);
+	tag_add_item(tag, TAG_TRACK, tracknum);
+	tag_add_item(tag, TAG_ALBUM, track->album);
+	tag_add_item(tag, TAG_DATE, date);
+	tag_add_item(tag, TAG_COMMENT, comment);
+	tag->time = track->length / 1000;
+
+	return tag;
+}
+
+struct despotify_session *mpd_despotify_get_session(void)
+{
+	const char *user;
+	const char *passwd;
+	bool high_bitrate;
+
+	if (g_session)
+		return g_session;
+
+	user = config_get_string(CONF_DESPOTIFY_USER, NULL);
+	passwd = config_get_string(CONF_DESPOTIFY_PASSWORD, NULL);
+	high_bitrate = config_get_bool(CONF_DESPOTIFY_HIGH_BITRATE, true);
+
+	if (user == NULL || passwd == NULL) {
+		g_debug("disabling despotify because account is not configured");
+		return NULL;
+	}
+		if (!despotify_init()) {
+		g_debug("Can't initialize despotify\n");
+		return false;
+	}
+
+	g_session = despotify_init_client(callback, NULL,
+			high_bitrate, true);
+	if (!g_session) {
+		g_debug("Can't initialize despotify client\n");
+		return false;
+	}
+
+    if (!despotify_authenticate(g_session, user, passwd)) {
+    	g_debug("Can't authenticate despotify session\n");
+    	despotify_exit(g_session);
+    	return false;
+    }
+
+	return g_session;
+}