Add sticker list command.

[mk: merged memory leak patch; fixed indentation (tabs); fixed
documentation typo]

doc/protocol.xml

@@ -1222,6 +1222,21 @@ OK
             </para>
           </listitem>
         </varlistentry>
+        <varlistentry id="command_sticker_list">
+          <term>
+            <cmdsynopsis>
+              <command>sticker</command>
+              <arg choice="plain">list</arg>
+              <arg choice="req"><replaceable>TYPE</replaceable></arg>
+              <arg choice="req"><replaceable>URI</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Lists the stickers for the specified object.
+            </para>
+          </listitem>
+        </varlistentry>
       </variablelist>
     </section>
 

src/command.c

@@ -1472,6 +1472,34 @@ handle_sticker_song(struct client *client, int argc, char *argv[])
 		client_printf(client, "sticker: %s=%s\n", argv[4], value);
 		g_free(value);
 
+		return COMMAND_RETURN_OK;
+	} else if (argc == 4 && strcmp(argv[1], "list") == 0) {
+		GList *list;
+		GPtrArray *values;
+		unsigned int x;
+
+		list = sticker_song_list_values(song);
+		if (NULL == list) {
+			command_error(client, ACK_ERROR_NO_EXIST,
+				      "no stickers found");
+			return COMMAND_RETURN_ERROR;
+		}
+
+		for (x = 0; x < g_list_length(list); x++) {
+			values = g_list_nth_data(list, x);
+			if (NULL == values) {
+				g_warning("NULL sticker found");
+				continue;
+			}
+			client_printf(client, "sticker: %s=%s\n",
+				      (char *)g_ptr_array_index(values, 0),
+				      (char *)g_ptr_array_index(values, 1));
+			g_free(g_ptr_array_index(values, 0));
+			g_free(g_ptr_array_index(values, 1));
+			g_ptr_array_free(values, TRUE);
+		}
+		g_list_free(list);
+
 		return COMMAND_RETURN_OK;
 	} else if (argc == 6 && strcmp(argv[1], "set") == 0) {
 		bool ret;
@@ -1479,7 +1507,7 @@ handle_sticker_song(struct client *client, int argc, char *argv[])
 		ret = sticker_song_set_value(song, argv[4], argv[5]);
 		if (!ret) {
 			command_error(client, ACK_ERROR_SYSTEM,
-				      "failed to set sticker vqalue");
+				      "failed to set sticker value");
 			return COMMAND_RETURN_ERROR;
 		}
 

src/song_sticker.c

@@ -39,6 +39,22 @@ sticker_song_get_value(const struct song *song, const char *name)
 	return value;
 }
 
+GList *
+sticker_song_list_values(const struct song *song)
+{
+	char *uri;
+	GList *list;
+
+	assert(song != NULL);
+	assert(song_in_database(song));
+
+	uri = song_get_uri(song);
+	list = sticker_list_values("song", uri);
+	g_free(uri);
+
+	return list;
+}
+
 bool
 sticker_song_set_value(const struct song *song,
 		       const char *name, const char *value)

src/song_sticker.h

@@ -20,6 +20,7 @@
 #define SONG_STICKER_H
 
 #include <stdbool.h>
+#include <glib.h>
 
 struct song;
 
@@ -38,6 +39,15 @@ bool
 sticker_song_set_value(const struct song *song,
 		       const char *name, const char *value);
 
+/**
+ * Returns a list of key value pairs from a song's sticker record.
+ * The caller must free each GPtrArray element of the returned list
+ * with g_ptr_array_free(), as well as the returned GList with
+ * g_list_free().
+ */
+GList *
+sticker_song_list_values(const struct song *song);
+
 /**
  * Deletes a sticker from the database.  All values are deleted.
  */

src/sticker.c

@@ -40,6 +40,9 @@ static const char sticker_sql_create[] =
 static const char sticker_sql_get[] =
 	"SELECT value FROM sticker WHERE type=? AND uri=? AND name=?";
 
+static const char sticker_sql_list[] =
+	"SELECT name,value FROM sticker WHERE type=? AND uri=?";
+
 static const char sticker_sql_update[] =
 	"UPDATE sticker SET value=? WHERE type=? AND uri=? AND name=?";
 
@@ -50,8 +53,9 @@ static const char sticker_sql_delete[] =
 	"DELETE FROM sticker WHERE type=? AND uri=?";
 
 static sqlite3 *sticker_db;
-static sqlite3_stmt *sticker_stmt_get, *sticker_stmt_update,
+static sqlite3_stmt *sticker_stmt_get, *sticker_stmt_list,
-	*sticker_stmt_insert, *sticker_stmt_delete;
+	*sticker_stmt_update, *sticker_stmt_insert,
+	*sticker_stmt_delete;
 
 static sqlite3_stmt *
 sticker_prepare(const char *sql)
@@ -93,12 +97,14 @@ sticker_global_init(const char *path)
 	/* prepare the statements we're going to use */
 
 	sticker_stmt_get = sticker_prepare(sticker_sql_get);
+	sticker_stmt_list = sticker_prepare(sticker_sql_list);
 	sticker_stmt_update = sticker_prepare(sticker_sql_update);
 	sticker_stmt_insert = sticker_prepare(sticker_sql_insert);
 	sticker_stmt_delete = sticker_prepare(sticker_sql_delete);
 
 	if (sticker_stmt_get == NULL || sticker_stmt_update == NULL ||
-	    sticker_stmt_insert == NULL || sticker_stmt_delete == NULL)
+	    sticker_stmt_insert == NULL || sticker_stmt_delete == NULL ||
+	    sticker_stmt_list == NULL)
 		g_error("Failed to prepare sqlite statements");
 }
 
@@ -112,6 +118,8 @@ sticker_global_finish(void)
 	sqlite3_finalize(sticker_stmt_delete);
 	sqlite3_finalize(sticker_stmt_update);
 	sqlite3_finalize(sticker_stmt_insert);
+	sqlite3_finalize(sticker_stmt_list);
+	sqlite3_finalize(sticker_stmt_get);
 	sqlite3_close(sticker_db);
 }
 
@@ -181,6 +189,67 @@ sticker_load_value(const char *type, const char *uri, const char *name)
 	return value;
 }
 
+GList *
+sticker_list_values(const char *type, const char *uri)
+{
+	int ret;
+	char *name, *value;
+	GPtrArray *arr;
+	GList *list;
+
+	list = NULL;
+	assert(type != NULL);
+	assert(uri != NULL);
+
+	assert(sticker_enabled());
+
+	sqlite3_reset(sticker_stmt_list);
+
+	ret = sqlite3_bind_text(sticker_stmt_list, 1, type, -1, NULL);
+	if (ret != SQLITE_OK) {
+		g_warning("sqlite3_bind_text() failed: %s",
+			  sqlite3_errmsg(sticker_db));
+		return NULL;
+	}
+
+	ret = sqlite3_bind_text(sticker_stmt_list, 2, uri, -1, NULL);
+	if (ret != SQLITE_OK) {
+		g_warning("sqlite3_bind_text() failed: %s",
+			  sqlite3_errmsg(sticker_db));
+		return NULL;
+	}
+
+	do {
+		ret = sqlite3_step(sticker_stmt_list);
+		switch (ret) {
+		case SQLITE_ROW:
+			name = g_strdup((const char*)sqlite3_column_text(sticker_stmt_list, 0));
+			value = g_strdup((const char*)sqlite3_column_text(sticker_stmt_list, 1));
+			arr = g_ptr_array_new();
+			g_ptr_array_add(arr, name);
+			g_ptr_array_add(arr, value);
+			list = g_list_prepend(list, arr);
+			break;
+		case SQLITE_DONE:
+			break;
+		case SQLITE_BUSY:
+			/* no op */
+			break;
+		default:
+			g_warning("sqlite3_step() failed: %s",
+				  sqlite3_errmsg(sticker_db));
+			return NULL;
+		}
+	} while (ret != SQLITE_DONE);
+
+	list = g_list_reverse(list);
+
+	sqlite3_reset(sticker_stmt_list);
+	sqlite3_clear_bindings(sticker_stmt_list);
+
+	return list;
+}
+
 static bool
 sticker_update_value(const char *type, const char *uri,
 		     const char *name, const char *value)

src/sticker.h

@@ -41,6 +41,8 @@
 #ifndef STICKER_H
 #define STICKER_H
 
+#include <glib.h>
+
 #include <stdbool.h>
 
 /**
@@ -61,6 +63,15 @@ sticker_global_finish(void);
 bool
 sticker_enabled(void);
 
+/**
+ * Populates a GList with GPtrArrays of sticker names and values from
+ * an object's sticker record.  The caller must free each GPtrArray
+ * element of the returned list with g_ptr_array_free(), as well as
+ * the returned GList with g_list_free().
+ */
+GList *
+sticker_list_values(const char *type, const char *uri);
+
 /**
  * Returns one value from an object's sticker record.  The caller must
  * free the return value with g_free().