public Game[] loadFromFile()
{
// 加载文档
XmlDocument document = new XmlDocument();
document.Load(fname);
// 加载根节点
XmlNode root = document.SelectSingleNode(@"/games");
// 日期信息
Game game = null;
Game[] games = null;
XmlNode nodeInfo = root.SelectSingleNode(@"info");
if (nodeInfo != null) {
string date = nodeInfo.SelectSingleNode(@"date").InnerText;
string number = nodeInfo.SelectSingleNode(@"number").InnerText;
game = new Game(date, number);
games = new Game[int.Parse(number) + 50];
games[0] = game;
} else {
throw new Exception("文件格式错误");
}
// 所有游戏开始读入
XmlNodeList glist = root.SelectNodes(@"game");
int c = 1;
foreach (XmlNode gnode in glist) {
string name = gnode.SelectSingleNode("name").InnerText;
string path = gnode.SelectSingleNode("path").InnerText;
string type = gnode.Attributes["type"].Value;
games[c] = new Game(name, path, (GameType)Enum.Parse(typeof(GameType), type));
c++;
}
return games;
}
public bool writeToFile(Game[] games)
{
if (games != null && games.Length > 0) {
XmlTextWriter writer = new XmlTextWriter(fname, Encoding.UTF8);
writer.Formatting = Formatting.Indented; // 设置缩进
writer.WriteStartDocument();
writer.WriteStartElement("games"); // 根节点
// 信息
writer.WriteStartElement("info");
{
// 日期
writer.WriteStartElement("date");
writer.WriteString(games[0].name);
writer.WriteEndElement();
// 数量
writer.WriteStartElement("number");
writer.WriteString(games[0].path);
writer.WriteEndElement();
// 文件格式版本
writer.WriteStartElement("version");
writer.WriteString("1.0");
writer.WriteEndElement();
}
writer.WriteEndElement();
// 写入游戏
for (int i = 1; i < games.Length; i++) {
writer.WriteStartElement("game");
// 类别作为属性
writer.WriteAttributeString("type", games[i].type.ToString());
// 名字
writer.WriteStartElement("name");
writer.WriteString(games[i].name);
writer.WriteEndElement();
// 地址
writer.WriteStartElement("path");
writer.WriteString(games[i].path);
writer.WriteEndElement();
writer.WriteEndElement();
}
// 关闭根节点
writer.WriteEndElement();
writer.WriteEndDocument();
writer.Close();
return true;
} else {
throw new ArgumentNullException("games", "没有输入数组或输入的数组为空");
}
}
public Game[] getGames()
{
// 获取页面
string page = getWikiPage();
// 按行分割页面
string[] lines = page.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
Game[] games = null;
int c = 0;
Regex regTag = new Regex(Tags.TAG_REGEX);
// 遍历每行，提取信息
for (int i = 0; i < lines.Length; i++) {
string line = lines[i];
/*
* 以下代码直接理解可能过于抽象
* 请配合wiki页面代码理解
*/
// 日期标志
if (line.Contains(Tags.DATE)) {
// 第一个用来记录日期和数量
Game game = new Game();
i++;
// 日期
game.name = lines[i];
i++;
// 数量
string number = Regex.Match(lines[i], @"\d+").Value;
game.path = number;
// 建立数组，由于更新的游戏会重复计数，需要预留空间
games = new Game[int.Parse(number) + 50];
games[c] = game;
c++;
continue;
} else if (regTag.IsMatch(line)) { // 匹配到标签
// 确认游戏类型
GameType type = GameType.unknown;
foreach (string tag in Tags.TAGS) {
if (line.Contains(tag)) {
type = (GameType)Enum.Parse(typeof(GameType), tag);
break;
}
}
// 找到开始标记
for (; i < lines.Length; i++) {
if (lines[i].Contains(Tags.TAG_START))
break;
}
// 不停读取游戏直到结束
Regex regContent = new Regex(Tags.CONTENT_REGEX);
for (; i < lines.Length; i++) {
line = lines[i];
// 匹配成功，该行是一个游戏
if (regContent.IsMatch(line)) {
string name = getName(line);
string link = getLink(line);
Game game = new Game(name, link, type);
games[c] = game;
c++;
continue;
} else if (line.Contains(Tags.TAG_END)) { // 结束标记，该类型已结束
break;
}
}
}
}
return games;
}