1 files changed, 604 insertions, 0 deletions
diff --git a/src/sticker/StickerDatabase.cxx b/src/sticker/StickerDatabase.cxx
new file mode 100644
index 000000000..93eaa900d
--- /dev/null
+++ b/src/sticker/StickerDatabase.cxx
@@ -0,0 +1,604 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "StickerDatabase.hxx"
+#include "fs/Path.hxx"
+#include "Idle.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "util/Macros.hxx"
+#include "Log.hxx"
+
+#include <string>
+#include <map>
+
+#include <sqlite3.h>
+#include <assert.h>
+
+#if SQLITE_VERSION_NUMBER < 3003009
+#define sqlite3_prepare_v2 sqlite3_prepare
+#endif
+
+struct sticker {
+	std::map<std::string, std::string> table;
+};
+
+enum sticker_sql {
+	STICKER_SQL_GET,
+	STICKER_SQL_LIST,
+	STICKER_SQL_UPDATE,
+	STICKER_SQL_INSERT,
+	STICKER_SQL_DELETE,
+	STICKER_SQL_DELETE_VALUE,
+	STICKER_SQL_FIND,
+};
+
+static const char *const sticker_sql[] = {
+	//[STICKER_SQL_GET] =
+	"SELECT value FROM sticker WHERE type=? AND uri=? AND name=?",
+	//[STICKER_SQL_LIST] =
+	"SELECT name,value FROM sticker WHERE type=? AND uri=?",
+	//[STICKER_SQL_UPDATE] =
+	"UPDATE sticker SET value=? WHERE type=? AND uri=? AND name=?",
+	//[STICKER_SQL_INSERT] =
+	"INSERT INTO sticker(type,uri,name,value) VALUES(?, ?, ?, ?)",
+	//[STICKER_SQL_DELETE] =
+	"DELETE FROM sticker WHERE type=? AND uri=?",
+	//[STICKER_SQL_DELETE_VALUE] =
+	"DELETE FROM sticker WHERE type=? AND uri=? AND name=?",
+	//[STICKER_SQL_FIND] =
+	"SELECT uri,value FROM sticker WHERE type=? AND uri LIKE (? || '%') AND name=?",
+};
+
+static const char sticker_sql_create[] =
+	"CREATE TABLE IF NOT EXISTS sticker("
+	"  type VARCHAR NOT NULL, "
+	"  uri VARCHAR NOT NULL, "
+	"  name VARCHAR NOT NULL, "
+	"  value VARCHAR NOT NULL"
+	");"
+	"CREATE UNIQUE INDEX IF NOT EXISTS"
+	" sticker_value ON sticker(type, uri, name);"
+	"";
+
+static sqlite3 *sticker_db;
+static sqlite3_stmt *sticker_stmt[ARRAY_SIZE(sticker_sql)];
+
+static constexpr Domain sticker_domain("sticker");
+
+static void
+LogError(sqlite3 *db, const char *msg)
+{
+	FormatError(sticker_domain, "%s: %s", msg, sqlite3_errmsg(db));
+}
+
+static sqlite3_stmt *
+sticker_prepare(const char *sql, Error &error)
+{
+	int ret;
+	sqlite3_stmt *stmt;
+
+	ret = sqlite3_prepare_v2(sticker_db, sql, -1, &stmt, nullptr);
+	if (ret != SQLITE_OK) {
+		error.Format(sticker_domain, ret,
+			     "sqlite3_prepare_v2() failed: %s",
+			     sqlite3_errmsg(sticker_db));
+		return nullptr;
+	}
+
+	return stmt;
+}
+
+bool
+sticker_global_init(Path path, Error &error)
+{
+	assert(!path.IsNull());
+
+	int ret;
+
+	/* open/create the sqlite database */
+
+	ret = sqlite3_open(path.c_str(), &sticker_db);
+	if (ret != SQLITE_OK) {
+		const std::string utf8 = path.ToUTF8();
+		error.Format(sticker_domain, ret,
+			    "Failed to open sqlite database '%s': %s",
+			    utf8.c_str(), sqlite3_errmsg(sticker_db));
+		return false;
+	}
+
+	/* create the table and index */
+
+	ret = sqlite3_exec(sticker_db, sticker_sql_create,
+			   nullptr, nullptr, nullptr);
+	if (ret != SQLITE_OK) {
+		error.Format(sticker_domain, ret,
+			     "Failed to create sticker table: %s",
+			     sqlite3_errmsg(sticker_db));
+		return false;
+	}
+
+	/* prepare the statements we're going to use */
+
+	for (unsigned i = 0; i < ARRAY_SIZE(sticker_sql); ++i) {
+		assert(sticker_sql[i] != nullptr);
+
+		sticker_stmt[i] = sticker_prepare(sticker_sql[i], error);
+		if (sticker_stmt[i] == nullptr)
+			return false;
+	}
+
+	return true;
+}
+
+void
+sticker_global_finish(void)
+{
+	if (sticker_db == nullptr)
+		/* not configured */
+		return;
+
+	for (unsigned i = 0; i < ARRAY_SIZE(sticker_stmt); ++i) {
+		assert(sticker_stmt[i] != nullptr);
+
+		sqlite3_finalize(sticker_stmt[i]);
+	}
+
+	sqlite3_close(sticker_db);
+}
+
+bool
+sticker_enabled(void)
+{
+	return sticker_db != nullptr;
+}
+
+std::string
+sticker_load_value(const char *type, const char *uri, const char *name)
+{
+	sqlite3_stmt *const stmt = sticker_stmt[STICKER_SQL_GET];
+	int ret;
+
+	assert(sticker_enabled());
+	assert(type != nullptr);
+	assert(uri != nullptr);
+	assert(name != nullptr);
+
+	if (*name == 0)
+		return std::string();
+
+	sqlite3_reset(stmt);
+
+	ret = sqlite3_bind_text(stmt, 1, type, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return std::string();
+	}
+
+	ret = sqlite3_bind_text(stmt, 2, uri, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return std::string();
+	}
+
+	ret = sqlite3_bind_text(stmt, 3, name, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return std::string();
+	}
+
+	do {
+		ret = sqlite3_step(stmt);
+	} while (ret == SQLITE_BUSY);
+
+	std::string value;
+	if (ret == SQLITE_ROW) {
+		/* record found */
+		value = (const char*)sqlite3_column_text(stmt, 0);
+	} else if (ret == SQLITE_DONE) {
+		/* no record found */
+	} else {
+		/* error */
+		LogError(sticker_db, "sqlite3_step() failed");
+	}
+
+	sqlite3_reset(stmt);
+	sqlite3_clear_bindings(stmt);
+
+	return value;
+}
+
+static bool
+sticker_list_values(std::map<std::string, std::string> &table,
+		    const char *type, const char *uri)
+{
+	sqlite3_stmt *const stmt = sticker_stmt[STICKER_SQL_LIST];
+	int ret;
+
+	assert(type != nullptr);
+	assert(uri != nullptr);
+	assert(sticker_enabled());
+
+	sqlite3_reset(stmt);
+
+	ret = sqlite3_bind_text(stmt, 1, type, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 2, uri, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	do {
+		ret = sqlite3_step(stmt);
+		switch (ret) {
+			const char *name, *value;
+
+		case SQLITE_ROW:
+			name = (const char*)sqlite3_column_text(stmt, 0);
+			value = (const char*)sqlite3_column_text(stmt, 1);
+
+			table.insert(std::make_pair(name, value));
+			break;
+		case SQLITE_DONE:
+			break;
+		case SQLITE_BUSY:
+			/* no op */
+			break;
+		default:
+			LogError(sticker_db, "sqlite3_step() failed");
+			return false;
+		}
+	} while (ret != SQLITE_DONE);
+
+	sqlite3_reset(stmt);
+	sqlite3_clear_bindings(stmt);
+
+	return true;
+}
+
+static bool
+sticker_update_value(const char *type, const char *uri,
+		     const char *name, const char *value)
+{
+	sqlite3_stmt *const stmt = sticker_stmt[STICKER_SQL_UPDATE];
+	int ret;
+
+	assert(type != nullptr);
+	assert(uri != nullptr);
+	assert(name != nullptr);
+	assert(*name != 0);
+	assert(value != nullptr);
+
+	assert(sticker_enabled());
+
+	sqlite3_reset(stmt);
+
+	ret = sqlite3_bind_text(stmt, 1, value, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 2, type, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 3, uri, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 4, name, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	do {
+		ret = sqlite3_step(stmt);
+	} while (ret == SQLITE_BUSY);
+
+	if (ret != SQLITE_DONE) {
+		LogError(sticker_db, "sqlite3_step() failed");
+		return false;
+	}
+
+	ret = sqlite3_changes(sticker_db);
+
+	sqlite3_reset(stmt);
+	sqlite3_clear_bindings(stmt);
+
+	idle_add(IDLE_STICKER);
+	return ret > 0;
+}
+
+static bool
+sticker_insert_value(const char *type, const char *uri,
+		     const char *name, const char *value)
+{
+	sqlite3_stmt *const stmt = sticker_stmt[STICKER_SQL_INSERT];
+	int ret;
+
+	assert(type != nullptr);
+	assert(uri != nullptr);
+	assert(name != nullptr);
+	assert(*name != 0);
+	assert(value != nullptr);
+
+	assert(sticker_enabled());
+
+	sqlite3_reset(stmt);
+
+	ret = sqlite3_bind_text(stmt, 1, type, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 2, uri, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 3, name, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 4, value, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	do {
+		ret = sqlite3_step(stmt);
+	} while (ret == SQLITE_BUSY);
+
+	if (ret != SQLITE_DONE) {
+		LogError(sticker_db, "sqlite3_step() failed");
+		return false;
+	}
+
+	sqlite3_reset(stmt);
+	sqlite3_clear_bindings(stmt);
+
+
+	idle_add(IDLE_STICKER);
+	return true;
+}
+
+bool
+sticker_store_value(const char *type, const char *uri,
+		    const char *name, const char *value)
+{
+	assert(sticker_enabled());
+	assert(type != nullptr);
+	assert(uri != nullptr);
+	assert(name != nullptr);
+	assert(value != nullptr);
+
+	if (*name == 0)
+		return false;
+
+	return sticker_update_value(type, uri, name, value) ||
+		sticker_insert_value(type, uri, name, value);
+}
+
+bool
+sticker_delete(const char *type, const char *uri)
+{
+	sqlite3_stmt *const stmt = sticker_stmt[STICKER_SQL_DELETE];
+	int ret;
+
+	assert(sticker_enabled());
+	assert(type != nullptr);
+	assert(uri != nullptr);
+
+	sqlite3_reset(stmt);
+
+	ret = sqlite3_bind_text(stmt, 1, type, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 2, uri, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	do {
+		ret = sqlite3_step(stmt);
+	} while (ret == SQLITE_BUSY);
+
+	if (ret != SQLITE_DONE) {
+		LogError(sticker_db, "sqlite3_step() failed");
+		return false;
+	}
+
+	sqlite3_reset(stmt);
+	sqlite3_clear_bindings(stmt);
+
+	idle_add(IDLE_STICKER);
+	return true;
+}
+
+bool
+sticker_delete_value(const char *type, const char *uri, const char *name)
+{
+	sqlite3_stmt *const stmt = sticker_stmt[STICKER_SQL_DELETE_VALUE];
+	int ret;
+
+	assert(sticker_enabled());
+	assert(type != nullptr);
+	assert(uri != nullptr);
+
+	sqlite3_reset(stmt);
+
+	ret = sqlite3_bind_text(stmt, 1, type, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 2, uri, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 3, name, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	do {
+		ret = sqlite3_step(stmt);
+	} while (ret == SQLITE_BUSY);
+
+	if (ret != SQLITE_DONE) {
+		LogError(sticker_db, "sqlite3_step() failed");
+		return false;
+	}
+
+	ret = sqlite3_changes(sticker_db);
+
+	sqlite3_reset(stmt);
+	sqlite3_clear_bindings(stmt);
+
+	idle_add(IDLE_STICKER);
+	return ret > 0;
+}
+
+void
+sticker_free(struct sticker *sticker)
+{
+	delete sticker;
+}
+
+const char *
+sticker_get_value(const struct sticker &sticker, const char *name)
+{
+	auto i = sticker.table.find(name);
+	if (i == sticker.table.end())
+		return nullptr;
+
+	return i->second.c_str();
+}
+
+void
+sticker_foreach(const sticker &sticker,
+		void (*func)(const char *name, const char *value,
+			     void *user_data),
+		void *user_data)
+{
+	for (const auto &i : sticker.table)
+		func(i.first.c_str(), i.second.c_str(), user_data);
+}
+
+struct sticker *
+sticker_load(const char *type, const char *uri)
+{
+	sticker s;
+
+	if (!sticker_list_values(s.table, type, uri))
+		return nullptr;
+
+	if (s.table.empty())
+		/* don't return empty sticker objects */
+		return nullptr;
+
+	return new sticker(std::move(s));
+}
+
+bool
+sticker_find(const char *type, const char *base_uri, const char *name,
+	     void (*func)(const char *uri, const char *value,
+			  void *user_data),
+	     void *user_data)
+{
+	sqlite3_stmt *const stmt = sticker_stmt[STICKER_SQL_FIND];
+	int ret;
+
+	assert(type != nullptr);
+	assert(name != nullptr);
+	assert(func != nullptr);
+	assert(sticker_enabled());
+
+	sqlite3_reset(stmt);
+
+	ret = sqlite3_bind_text(stmt, 1, type, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	if (base_uri == nullptr)
+		base_uri = "";
+
+	ret = sqlite3_bind_text(stmt, 2, base_uri, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	ret = sqlite3_bind_text(stmt, 3, name, -1, nullptr);
+	if (ret != SQLITE_OK) {
+		LogError(sticker_db, "sqlite3_bind_text() failed");
+		return false;
+	}
+
+	do {
+		ret = sqlite3_step(stmt);
+		switch (ret) {
+		case SQLITE_ROW:
+			func((const char*)sqlite3_column_text(stmt, 0),
+			     (const char*)sqlite3_column_text(stmt, 1),
+			     user_data);
+			break;
+		case SQLITE_DONE:
+			break;
+		case SQLITE_BUSY:
+			/* no op */
+			break;
+		default:
+			LogError(sticker_db, "sqlite3_step() failed");
+			return false;
+		}
+	} while (ret != SQLITE_DONE);
+
+	sqlite3_reset(stmt);
+	sqlite3_clear_bindings(stmt);
+
+	return true;
+}