Log file changes

New: Update log files are available in the UI
Fixed: UI error after clearing log files

src/NzbDrone.Api/Logs/LogFileModuleBase.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using NzbDrone.Common.Disk;
+using Nancy;
+using Nancy.Responses;
+using NzbDrone.Core.Configuration;
+
+namespace NzbDrone.Api.Logs
+{
+    public abstract class LogFileModuleBase : NzbDroneRestModule<LogFileResource>
+    {
+        protected const string LOGFILE_ROUTE = @"/(?<filename>[-.a-zA-Z0-9]+?\.txt)";
+
+        private readonly IDiskProvider _diskProvider;
+        private readonly IConfigFileProvider _configFileProvider;
+
+        public LogFileModuleBase(IDiskProvider diskProvider,
+                                 IConfigFileProvider configFileProvider,
+                                 String route)
+            : base("log/file" + route)
+        {
+            _diskProvider = diskProvider;
+            _configFileProvider = configFileProvider;
+            GetResourceAll = GetLogFilesResponse;
+
+            Get[LOGFILE_ROUTE] = options => GetLogFileResponse(options.filename);
+        }
+
+        private List<LogFileResource> GetLogFilesResponse()
+        {
+            var result = new List<LogFileResource>();
+
+            var files = GetLogFiles().ToList();
+
+            for (int i = 0; i < files.Count; i++)
+            {
+                var file = files[i];
+                var filename = Path.GetFileName(file);
+                
+                result.Add(new LogFileResource
+                {
+                    Id = i + 1,
+                    Filename = filename,
+                    LastWriteTime = _diskProvider.FileGetLastWriteUtc(file),
+                    ContentsUrl = String.Format("/api{0}/{1}/{2}", _configFileProvider.UrlBase, Resource, filename),
+                    DownloadUrl = String.Format("{0}/{1}/{2}", _configFileProvider.UrlBase, DownloadUrlRoot, filename)
+                });
+            }
+
+            return result.OrderByDescending(l => l.LastWriteTime).ToList();
+        }
+
+        private Response GetLogFileResponse(String filename)
+        {
+            var filePath = GetLogFilePath(filename);
+
+            if (!_diskProvider.FileExists(filePath))
+                return new NotFoundResponse();
+
+            var data = _diskProvider.ReadAllText(filePath);
+            
+            return new TextResponse(data);
+        }
+
+        protected abstract IEnumerable<String> GetLogFiles();
+        protected abstract String GetLogFilePath(String filename);
+
+        protected abstract String DownloadUrlRoot { get; }
+    }
+}