...

1 files changed, 80 insertions, 6 deletions

diff --git a/Timeline/Services/TimelineService.cs b/Timeline/Services/TimelineService.cs
index d999587a..edd0a0ab 100644
--- a/Timeline/Services/TimelineService.cs
+++ b/Timeline/Services/TimelineService.cs
@@ -32,6 +32,14 @@ namespace Timeline.Services
         public long UserId { get; set; }

     }

 

+    public class DataWithType

+    {

+#pragma warning disable CA1819 // Properties should not return arrays

+        public byte[] Data { get; set; } = default!;

+#pragma warning restore CA1819 // Properties should not return arrays

+        public string Type { get; set; } = default!;

+    }

+

     /// <summary>

     /// This define the common interface of both personal timeline

     /// and normal timeline.

@@ -90,6 +98,21 @@ namespace Timeline.Services
         Task<List<TimelinePostInfo>> GetPosts(string name);

 

         /// <summary>

+        /// Get the data of a post.

+        /// </summary>

+        /// <param name="name">Username or the timeline name. See remarks of <see cref="IBaseTimelineService"/>.</param>

+        /// <param name="postId">The id of the post.</param>

+        /// <returns>The data and its type.</returns>

+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="name"/> is null.</exception>

+        /// <exception cref="ArgumentException">Thrown when <paramref name="name"/> is illegal. It is not a valid timeline name (for normal timeline service) or a valid username (for personal timeline service).</exception>

+        /// <exception cref="TimelinePostNotExistException">Thrown when post of <paramref name="postId"/> does not exist.</exception>

+        /// <exception cref="InvalidOperationException">Thrown when post has no data. See remarks.</exception>

+        /// <remarks>

+        /// Use this method to retrieve the image of image post.

+        /// </remarks>

+        Task<DataWithType> GetPostData(string name, long postId);

+

+        /// <summary>

         /// Create a new text post in timeline.

         /// </summary>

         /// <param name="name">Username or the timeline name. See remarks of <ssee cref="IBaseTimelineService"/>.</param>

@@ -307,10 +330,12 @@ namespace Timeline.Services
 

     public abstract class BaseTimelineService : IBaseTimelineService

     {

-        protected BaseTimelineService(ILoggerFactory loggerFactory, DatabaseContext database, IUserService userService, IMapper mapper, IClock clock)

+        protected BaseTimelineService(ILoggerFactory loggerFactory, DatabaseContext database, IImageValidator imageValidator, IDataManager dataManager, IUserService userService, IMapper mapper, IClock clock)

         {

             Clock = clock;

             Database = database;

+            ImageValidator = imageValidator;

+            DataManager = dataManager;

             UserService = userService;

             Mapper = mapper;

         }

@@ -321,6 +346,8 @@ namespace Timeline.Services
 

         protected DatabaseContext Database { get; }

 

+        protected IImageValidator ImageValidator { get; }

+        protected IDataManager DataManager { get; }

         protected IUserService UserService { get; }

 

         protected IMapper Mapper { get; }

@@ -451,7 +478,54 @@ namespace Timeline.Services
             return new TimelinePostInfo

             {

                 Id = postEntity.LocalId,

-                Content = text,

+                Content = new TextTimelinePostContent(text),

+                Author = author,

+                Time = finalTime,

+                LastUpdated = currentTime

+            };

+        }

+

+        public async Task<TimelinePostInfo> CreateImagePost(string name, long authorId, byte[] data, DateTime? time)

+        {

+            if (name == null)

+                throw new ArgumentNullException(nameof(name));

+            if (data == null)

+                throw new ArgumentNullException(nameof(data));

+

+            var timelineId = await FindTimelineId(name);

+            var timelineEntity = await Database.Timelines.Where(t => t.Id == timelineId).SingleAsync();

+

+            var author = Mapper.Map<UserInfo>(await UserService.GetUserById(authorId));

+

+            var imageFormat = await ImageValidator.Validate(data);

+

+            var imageFormatText = imageFormat.DefaultMimeType;

+

+            var tag = await DataManager.RetainEntry(data);

+

+            var currentTime = Clock.GetCurrentTime();

+            var finalTime = time ?? currentTime;

+

+            timelineEntity.CurrentPostLocalId += 1;

+

+            var postEntity = new TimelinePostEntity

+            {

+                LocalId = timelineEntity.CurrentPostLocalId,

+                ContentType = TimelinePostContentTypes.Image,

+                Content = tag,

+                ExtraContent = imageFormatText,

+                AuthorId = authorId,

+                TimelineId = timelineId,

+                Time = finalTime,

+                LastUpdated = currentTime

+            };

+            Database.TimelinePosts.Add(postEntity);

+            await Database.SaveChangesAsync();

+

+            return new TimelinePostInfo

+            {

+                Id = postEntity.LocalId,

+                Content = new ImageTimelinePostContent(tag),

                 Author = author,

                 Time = finalTime,

                 LastUpdated = currentTime

@@ -658,8 +732,8 @@ namespace Timeline.Services
             }

         }

 

-        public TimelineService(ILoggerFactory loggerFactory, DatabaseContext database, IUserService userService, IMapper mapper, IClock clock)

-            : base(loggerFactory, database, userService, mapper, clock)

+        public TimelineService(ILoggerFactory loggerFactory, DatabaseContext database, IImageValidator imageValidator, IDataManager dataManager, IUserService userService, IMapper mapper, IClock clock)

+            : base(loggerFactory, database, imageValidator, dataManager, userService, mapper, clock)

         {

 

         }

@@ -788,8 +862,8 @@ namespace Timeline.Services
 

     public class PersonalTimelineService : BaseTimelineService, IPersonalTimelineService

     {

-        public PersonalTimelineService(ILoggerFactory loggerFactory, DatabaseContext database, IUserService userService, IMapper mapper, IClock clock)

-            : base(loggerFactory, database, userService, mapper, clock)

+        public PersonalTimelineService(ILoggerFactory loggerFactory, DatabaseContext database, IImageValidator imageValidator, IDataManager dataManager, IUserService userService, IMapper mapper, IClock clock)

+            : base(loggerFactory, database, imageValidator, dataManager, userService, mapper, clock)

         {

 

         }