Synnefo » Pithos MS Client

using System;

using System.Diagnostics.Contracts;

using System.IO;

using System.Threading;

using Pithos.Interfaces;

using Pithos.Network;

namespace Pithos.Core.Agents

{

    public enum CloudActionType

    {

        MustSynch,

        UploadUnconditional,

        DownloadUnconditional,

        DeleteLocal,

        DeleteCloud,

        RenameCloud

    }

    public class CloudAction

    {

        public AccountInfo AccountInfo { get; set; }

        public CloudActionType Action { get; set; }

        public FileInfo LocalFile { get; set; }

        public ObjectInfo CloudFile { get; set; }

        public FileState FileState { get; set; }

        public string Container { get; set; }

        public Lazy<string> LocalHash { get; protected set; }

        private Lazy<string> _topHash;

        public Lazy<string> TopHash

        {

            get { return _topHash; }

            set { _topHash = value; }

        }

        [ContractInvariantMethod]

        private void Invariants()

        {

            Contract.Invariant(AccountInfo!=null);

        }

        protected CloudAction(AccountInfo accountInfo,CloudActionType action)

        {

            if (accountInfo==null)

                throw new ArgumentNullException("accountInfo");

            Contract.EndContractBlock();

            Action = action;

            AccountInfo = accountInfo;

        }

        public CloudAction(AccountInfo accountInfo, CloudActionType action, FileInfo localFile, ObjectInfo cloudFile, FileState state, int blockSize, string algorithm)

            : this(accountInfo,action)

        {

            LocalFile = localFile;

            CloudFile = cloudFile;

            FileState = state;

            if (LocalFile != null)

            {

                LocalHash = new Lazy<string>(() => LocalFile.CalculateHash(blockSize,algorithm),

                                             LazyThreadSafetyMode.ExecutionAndPublication);

            }

        }

        //Calculate the download path for the cloud file

        public string GetDownloadPath()

        {

            if (CloudFile == null)

                return String.Empty;

            var filePath = CloudFile.RelativeUrlToFilePath(AccountInfo.UserName);

            return Path.Combine(AccountInfo.AccountPath, filePath);

        }

    }    

    public class CloudDownloadAction:CloudAction

    {

        public CloudDownloadAction(AccountInfo accountInfo, ObjectInfo cloudFile)

            :base(accountInfo,CloudActionType.DownloadUnconditional)

        {            

            CloudFile = cloudFile;

        }

    }

    public class CloudDeleteAction:CloudAction

    {

        public CloudDeleteAction(AccountInfo accountInfo, string fileName, FileState fileState)

            : this(accountInfo,new ObjectInfo { Name = fileName },fileState)

        {

        }

        public CloudDeleteAction(AccountInfo accountInfo, ObjectInfo cloudFile, FileState fileState) 

            : base(accountInfo,CloudActionType.DeleteCloud)

        {

            CloudFile = cloudFile;

            FileState = fileState;

        }

        public CloudDeleteAction(CloudAction action)

            : this(action.AccountInfo,action.CloudFile,action.FileState)

        {}

    }

    public class CloudUploadAction:CloudAction

    {

        public CloudUploadAction(AccountInfo accountInfo, FileInfo fileInfo, FileState state, int blockSize, string algorithm) 

            : base(accountInfo,CloudActionType.UploadUnconditional,fileInfo,ObjectInfo.Empty,state,blockSize,algorithm)

        {

        }

    }

    public class CloudMoveAction:CloudAction

    {

        public string OldFileName { get; set; }

        public string OldPath { get; set; }

        public string NewFileName { get; set; }

        public string NewPath { get; set; }

        public CloudMoveAction(AccountInfo accountInfo, CloudActionType action, string oldPath, string oldFileName, string newFileName, string newPath)

            :base(accountInfo,action)

        {

            OldFileName = oldFileName;

            OldPath = oldPath;

            NewFileName = newFileName;

            NewPath = newPath;

            //This is a rename operation, a hash will not be used

            LocalHash = new Lazy<string>(() => String.Empty, LazyThreadSafetyMode.ExecutionAndPublication);

        }

    }

}