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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using MediaBrowser.Controller;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Model.IO;
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using Microsoft.Extensions.Logging;
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namespace MediaBrowser.WebDashboard.Api
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{
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public class PackageCreator
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{
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private readonly IFileSystem _fileSystem;
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private readonly ILogger _logger;
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private readonly IServerConfigurationManager _config;
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private readonly string _basePath;
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private IResourceFileManager _resourceFileManager;
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public PackageCreator(string basePath, IFileSystem fileSystem, ILogger logger, IServerConfigurationManager config, IResourceFileManager resourceFileManager)
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{
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_fileSystem = fileSystem;
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_logger = logger;
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_config = config;
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_basePath = basePath;
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_resourceFileManager = resourceFileManager;
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}
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public async Task<Stream> GetResource(string virtualPath,
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string mode,
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string localizationCulture,
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string appVersion)
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{
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var resourceStream = GetRawResourceStream(virtualPath);
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if (resourceStream != null)
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{
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if (IsFormat(virtualPath, "html"))
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{
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if (IsCoreHtml(virtualPath))
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{
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resourceStream = await ModifyHtml(virtualPath, resourceStream, mode, appVersion, localizationCulture).ConfigureAwait(false);
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}
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}
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}
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return resourceStream;
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}
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/// <summary>
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/// Determines whether the specified path is HTML.
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/// </summary>
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/// <param name="path">The path.</param>
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/// <param name="format">The format.</param>
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/// <returns><c>true</c> if the specified path is HTML; otherwise, <c>false</c>.</returns>
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private static bool IsFormat(string path, string format)
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{
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return Path.GetExtension(path).EndsWith(format, StringComparison.OrdinalIgnoreCase);
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}
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public bool IsCoreHtml(string path)
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{
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if (path.IndexOf(".template.html", StringComparison.OrdinalIgnoreCase) != -1)
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{
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return false;
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}
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return IsFormat(path, "html");
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}
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/// <summary>
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/// Modifies the HTML by adding common meta tags, css and js.
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/// </summary>
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/// <returns>Task{Stream}.</returns>
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public async Task<Stream> ModifyHtml(string path, Stream sourceStream, string mode, string appVersion, string localizationCulture)
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{
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var isMainIndexPage = string.Equals(path, "index.html", StringComparison.OrdinalIgnoreCase);
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using (sourceStream)
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{
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string html;
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using (var memoryStream = new MemoryStream())
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{
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await sourceStream.CopyToAsync(memoryStream).ConfigureAwait(false);
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var originalBytes = memoryStream.ToArray();
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html = Encoding.UTF8.GetString(originalBytes, 0, originalBytes.Length);
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if (isMainIndexPage)
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{
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if (!string.IsNullOrWhiteSpace(localizationCulture))
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{
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var lang = localizationCulture.Split('-').FirstOrDefault();
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html = html.Replace("<html", "<html data-culture=\"" + localizationCulture + "\" lang=\"" + lang + "\"");
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}
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}
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}
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if (isMainIndexPage)
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{
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html = html.Replace("<head>", "<head>" + GetMetaTags(mode));
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}
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// Disable embedded scripts from plugins. We'll run them later once resources have loaded
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if (html.IndexOf("<script", StringComparison.OrdinalIgnoreCase) != -1)
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{
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html = html.Replace("<script", "<!--<script");
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html = html.Replace("</script>", "</script>-->");
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}
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if (isMainIndexPage)
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{
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html = html.Replace("</body>", GetCommonJavascript(mode, appVersion) + "</body>");
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}
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var bytes = Encoding.UTF8.GetBytes(html);
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return new MemoryStream(bytes);
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}
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}
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/// <summary>
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/// Gets the meta tags.
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/// </summary>
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/// <returns>System.String.</returns>
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private string GetMetaTags(string mode)
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{
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var sb = new StringBuilder();
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if (string.Equals(mode, "cordova", StringComparison.OrdinalIgnoreCase) ||
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string.Equals(mode, "android", StringComparison.OrdinalIgnoreCase))
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{
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sb.Append("<meta http-equiv=\"Content-Security-Policy\" content=\"default-src * 'self' 'unsafe-inline' 'unsafe-eval' data: gap: file: filesystem: ws: wss:;\">");
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}
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return sb.ToString();
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}
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/// <summary>
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/// Gets the common javascript.
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/// </summary>
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/// <param name="mode">The mode.</param>
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/// <param name="version">The version.</param>
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/// <returns>System.String.</returns>
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private string GetCommonJavascript(string mode, string version)
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{
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var builder = new StringBuilder();
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builder.Append("<script>");
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if (!string.IsNullOrWhiteSpace(mode))
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{
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builder.AppendFormat("window.appMode='{0}';", mode);
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}
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else
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{
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builder.AppendFormat("window.dashboardVersion='{0}';", version);
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}
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builder.Append("</script>");
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var versionString = string.IsNullOrWhiteSpace(mode) ? "?v=" + version : string.Empty;
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var files = new List<string>();
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files.Add("scripts/apploader.js" + versionString);
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if (string.Equals(mode, "cordova", StringComparison.OrdinalIgnoreCase))
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{
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files.Insert(0, "cordova.js");
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}
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var tags = files.Select(s => string.Format("<script src=\"{0}\" defer></script>", s)).ToArray();
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builder.Append(string.Join(string.Empty, tags));
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return builder.ToString();
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}
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/// <summary>
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/// Gets the raw resource stream.
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/// </summary>
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private Stream GetRawResourceStream(string virtualPath)
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{
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return _resourceFileManager.GetResourceFileStream(_basePath, virtualPath);
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}
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}
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}
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